Android Camera 2 Api Example With & Without Preview Android Java by Rajesh Kumar Sahanee - September 11, 2017April 25, 20200 Post Views: 26,852 Hi, Friends today I am going to share code by which you can use android camera 2 api to click picture. I’d created two classes named as CameraControllerV2WithPreview for taking picture with preview and another one is CameraControllerV2WithoutPreview for taking picture without preview. Camera 2 Api is latest Api introduced in android version Lollipop, So Camera 2 Api can be used in Lollipop and higher versions of android. So here is the code, CameraControllerV2WithPreview.java CameraControllerV2WithPreview.java Java package com.zatackcoder.camera2test; import android.Manifest; import android.app.Activity; import android.content.Context; import android.content.pm.PackageManager; import android.content.res.Configuration; import android.graphics.ImageFormat; import android.graphics.Matrix; import android.graphics.Point; import android.graphics.RectF; import android.graphics.SurfaceTexture; import android.hardware.camera2.CameraAccessException; import android.hardware.camera2.CameraCaptureSession; import android.hardware.camera2.CameraCharacteristics; import android.hardware.camera2.CameraDevice; import android.hardware.camera2.CameraManager; import android.hardware.camera2.CameraMetadata; import android.hardware.camera2.CaptureRequest; import android.hardware.camera2.CaptureResult; import android.hardware.camera2.TotalCaptureResult; import android.hardware.camera2.params.StreamConfigurationMap; import android.media.Image; import android.media.ImageReader; import android.os.Build; import android.os.Environment; import android.os.Handler; import android.os.HandlerThread; import android.support.annotation.NonNull; import android.support.annotation.RequiresApi; import android.support.v4.content.ContextCompat; import android.util.Log; import android.util.Size; import android.util.SparseIntArray; import android.view.Surface; import android.view.TextureView; import android.widget.Toast; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.nio.ByteBuffer; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.Comparator; import java.util.Date; import java.util.List; import java.util.concurrent.Semaphore; import java.util.concurrent.TimeUnit; /** * Created by rajesh kumar sahanee on 2/9/17. */ @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP) public class CameraControllerV2WithPreview { Activity activity; /** * Conversion from screen rotation to JPEG orientation. */ private static final SparseIntArray ORIENTATIONS = new SparseIntArray(); static { ORIENTATIONS.append(Surface.ROTATION_0, 90); ORIENTATIONS.append(Surface.ROTATION_90, 0); ORIENTATIONS.append(Surface.ROTATION_180, 270); ORIENTATIONS.append(Surface.ROTATION_270, 180); } private static final String TAG = "CCV2WithPreview"; private static final int STATE_PREVIEW = 0; private static final int STATE_WAITING_LOCK = 1; private static final int STATE_WAITING_PRECAPTURE = 2; private static final int STATE_WAITING_NON_PRECAPTURE = 3; private static final int STATE_PICTURE_TAKEN = 4; private static final int MAX_PREVIEW_WIDTH = 1920; private static final int MAX_PREVIEW_HEIGHT = 1080; private AutoFitTextureView textureView; private String mCameraId; private CameraCaptureSession mCaptureSession; private CameraDevice mCameraDevice; private Size mPreviewSize; private HandlerThread backgroundThread; private Handler backgroundHandler; private ImageReader imageReader; private File file; private CaptureRequest.Builder mPreviewRequestBuilder; private CaptureRequest mPreviewRequest; private int mState = STATE_PREVIEW; private Semaphore mCameraOpenCloseLock = new Semaphore(1); private boolean mFlashSupported; private int mSensorOrientation; public CameraControllerV2WithPreview(Activity activity, AutoFitTextureView textureView) { this.activity = activity; this.textureView = textureView; this.textureView.setSurfaceTextureListener(mSurfaceTextureListener); file = getOutputMediaFile(); } private final TextureView.SurfaceTextureListener mSurfaceTextureListener = new TextureView.SurfaceTextureListener() { @Override public void onSurfaceTextureAvailable(SurfaceTexture texture, int width, int height) { openCamera(width, height); } @Override public void onSurfaceTextureSizeChanged(SurfaceTexture texture, int width, int height) { configureTransform(width, height); } @Override public boolean onSurfaceTextureDestroyed(SurfaceTexture texture) { return true; } @Override public void onSurfaceTextureUpdated(SurfaceTexture texture) { } }; private final CameraDevice.StateCallback mStateCallback = new CameraDevice.StateCallback() { @Override public void onOpened(@NonNull CameraDevice cameraDevice) { // This method is called when the camera is opened. We start camera preview here. mCameraOpenCloseLock.release(); mCameraDevice = cameraDevice; createCameraPreviewSession(); } @Override public void onDisconnected(@NonNull CameraDevice cameraDevice) { mCameraOpenCloseLock.release(); cameraDevice.close(); mCameraDevice = null; } @Override public void onError(@NonNull CameraDevice cameraDevice, int error) { mCameraOpenCloseLock.release(); cameraDevice.close(); mCameraDevice = null; if(activity != null) { activity.finish(); } } }; private final ImageReader.OnImageAvailableListener mOnImageAvailableListener = new ImageReader.OnImageAvailableListener() { @Override public void onImageAvailable(ImageReader reader) { Log.d(TAG, "ImageAvailable"); backgroundHandler.post(new ImageSaver(reader.acquireNextImage(), file)); } }; private CameraCaptureSession.CaptureCallback mCaptureCallback = new CameraCaptureSession.CaptureCallback() { private void process(CaptureResult result) { switch (mState) { case STATE_PREVIEW: { // We have nothing to do when the camera preview is working normally. Log.d(TAG, "STATE_PREVIEW"); break; } case STATE_WAITING_LOCK: { Integer afState = result.get(CaptureResult.CONTROL_AF_STATE); if (afState == null) { captureStillPicture(); } else if (CaptureResult.CONTROL_AF_STATE_FOCUSED_LOCKED == afState || CaptureResult.CONTROL_AF_STATE_NOT_FOCUSED_LOCKED == afState) { // CONTROL_AE_STATE can be null on some devices Integer aeState = result.get(CaptureResult.CONTROL_AE_STATE); if (aeState == null || aeState == CaptureResult.CONTROL_AE_STATE_CONVERGED) { mState = STATE_PICTURE_TAKEN; captureStillPicture(); } else { runPrecaptureSequence(); } } Log.d(TAG, "STATE_WAITING_LOCK"); break; } case STATE_WAITING_PRECAPTURE: { // CONTROL_AE_STATE can be null on some devices Integer aeState = result.get(CaptureResult.CONTROL_AE_STATE); if (aeState == null || aeState == CaptureResult.CONTROL_AE_STATE_PRECAPTURE || aeState == CaptureRequest.CONTROL_AE_STATE_FLASH_REQUIRED) { mState = STATE_WAITING_NON_PRECAPTURE; } Log.d(TAG, "STATE_WAITING_PRECAPTURE"); break; } case STATE_WAITING_NON_PRECAPTURE: { // CONTROL_AE_STATE can be null on some devices Integer aeState = result.get(CaptureResult.CONTROL_AE_STATE); if (aeState == null || aeState != CaptureResult.CONTROL_AE_STATE_PRECAPTURE) { mState = STATE_PICTURE_TAKEN; captureStillPicture(); } Log.d(TAG, "STATE_WAITING_NON_PRECAPTURE"); break; } } } @Override public void onCaptureProgressed(@NonNull CameraCaptureSession session, @NonNull CaptureRequest request, @NonNull CaptureResult partialResult) { process(partialResult); } @Override public void onCaptureCompleted(@NonNull CameraCaptureSession session, @NonNull CaptureRequest request, @NonNull TotalCaptureResult result) { process(result); } }; private static Size chooseOptimalSize(Size[] choices, int textureViewWidth, int textureViewHeight, int maxWidth, int maxHeight, Size aspectRatio) { // Collect the supported resolutions that are at least as big as the preview Surface List<Size> bigEnough = new ArrayList<>(); // Collect the supported resolutions that are smaller than the preview Surface List<Size> notBigEnough = new ArrayList<>(); int w = aspectRatio.getWidth(); int h = aspectRatio.getHeight(); for (Size option : choices) { if (option.getWidth() <= maxWidth && option.getHeight() <= maxHeight && option.getHeight() == option.getWidth() * h / w) { if (option.getWidth() >= textureViewWidth && option.getHeight() >= textureViewHeight) { bigEnough.add(option); } else { notBigEnough.add(option); } } } // Pick the smallest of those big enough. If there is no one big enough, pick the // largest of those not big enough. if (bigEnough.size() > 0) { return Collections.min(bigEnough, new CompareSizesByArea()); } else if (notBigEnough.size() > 0) { return Collections.max(notBigEnough, new CompareSizesByArea()); } else { Log.e(TAG, "Couldn't find any suitable preview size"); return choices[0]; } } private void setUpCameraOutputs(int width, int height) { CameraManager manager = (CameraManager) activity.getSystemService(Context.CAMERA_SERVICE); try { for (String cameraId : manager.getCameraIdList()) { CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraId); // We don't use a front facing camera in this sample. Integer facing = characteristics.get(CameraCharacteristics.LENS_FACING); if (facing != null && facing == CameraCharacteristics.LENS_FACING_FRONT) { continue; } StreamConfigurationMap map = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP); if (map == null) { continue; } // For still image captures, we use the largest available size. Size largest = Collections.max(Arrays.asList(map.getOutputSizes(ImageFormat.JPEG)), new CompareSizesByArea()); imageReader = ImageReader.newInstance(largest.getWidth(), largest.getHeight(), ImageFormat.JPEG, /*maxImages*/2); imageReader.setOnImageAvailableListener(mOnImageAvailableListener, backgroundHandler); // Find out if we need to swap dimension to get the preview size relative to sensor // coordinate. int displayRotation = activity.getWindowManager().getDefaultDisplay().getRotation();//getWindowManager().getDefaultDisplay().getRotation(); //noinspection ConstantConditions mSensorOrientation = characteristics.get(CameraCharacteristics.SENSOR_ORIENTATION); boolean swappedDimensions = false; switch (displayRotation) { case Surface.ROTATION_0: case Surface.ROTATION_180: if (mSensorOrientation == 90 || mSensorOrientation == 270) { swappedDimensions = true; } break; case Surface.ROTATION_90: case Surface.ROTATION_270: if (mSensorOrientation == 0 || mSensorOrientation == 180) { swappedDimensions = true; } break; default: Log.e(TAG, "Display rotation is invalid: " + displayRotation); } Point displaySize = new Point(); activity.getWindowManager().getDefaultDisplay().getSize(displaySize);//getWindowManager().getDefaultDisplay().getSize(displaySize); int rotatedPreviewWidth = width; int rotatedPreviewHeight = height; int maxPreviewWidth = displaySize.x; int maxPreviewHeight = displaySize.y; if (swappedDimensions) { rotatedPreviewWidth = height; rotatedPreviewHeight = width; maxPreviewWidth = displaySize.y; maxPreviewHeight = displaySize.x; } if (maxPreviewWidth > MAX_PREVIEW_WIDTH) { maxPreviewWidth = MAX_PREVIEW_WIDTH; } if (maxPreviewHeight > MAX_PREVIEW_HEIGHT) { maxPreviewHeight = MAX_PREVIEW_HEIGHT; } // Danger, W.R.! Attempting to use too large a preview size could exceed the camera // bus' bandwidth limitation, resulting in gorgeous previews but the storage of // garbage capture data. mPreviewSize = chooseOptimalSize(map.getOutputSizes(SurfaceTexture.class), rotatedPreviewWidth, rotatedPreviewHeight, maxPreviewWidth, maxPreviewHeight, largest); // We fit the aspect ratio of TextureView to the size of preview we picked. int orientation = activity.getResources().getConfiguration().orientation; if (orientation == Configuration.ORIENTATION_LANDSCAPE) { textureView.setAspectRatio(mPreviewSize.getWidth(), mPreviewSize.getHeight()); } else { textureView.setAspectRatio(mPreviewSize.getHeight(), mPreviewSize.getWidth()); } // Check if the flash is supported. Boolean available = characteristics.get(CameraCharacteristics.FLASH_INFO_AVAILABLE); mFlashSupported = available == null ? false : available; mCameraId = cameraId; return; } } catch (CameraAccessException e) { e.printStackTrace(); } catch (NullPointerException e) { // Currently an NPE is thrown when the Camera2API is used but not supported on the // device this code runs. e.printStackTrace(); } } public void openCamera(int width, int height) { if (ContextCompat.checkSelfPermission(activity, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) { return; } setUpCameraOutputs(width, height); configureTransform(width, height); CameraManager manager = (CameraManager) activity.getSystemService(Context.CAMERA_SERVICE); try { if (!mCameraOpenCloseLock.tryAcquire(2500, TimeUnit.MILLISECONDS)) { throw new RuntimeException("Time out waiting to lock camera opening."); } startBackgroundThread(); manager.openCamera(mCameraId, mStateCallback, backgroundHandler); } catch (CameraAccessException e) { e.printStackTrace(); } catch (InterruptedException e) { throw new RuntimeException("Interrupted while trying to lock camera opening.", e); } } public void closeCamera() { try { mCameraOpenCloseLock.acquire(); if (null != mCaptureSession) { mCaptureSession.close(); mCaptureSession = null; } if (null != mCameraDevice) { mCameraDevice.close(); mCameraDevice = null; } if (null != imageReader) { imageReader.close(); imageReader = null; } } catch (InterruptedException e) { throw new RuntimeException("Interrupted while trying to lock camera closing.", e); } finally { mCameraOpenCloseLock.release(); stopBackgroundThread(); } } private void startBackgroundThread() { backgroundThread = new HandlerThread("CameraBackground"); backgroundThread.start(); backgroundHandler = new Handler(backgroundThread.getLooper()); } private void stopBackgroundThread() { backgroundThread.quitSafely(); try { backgroundThread.join(); backgroundThread = null; backgroundHandler = null; } catch (InterruptedException e) { e.printStackTrace(); } } private void createCameraPreviewSession() { try { SurfaceTexture texture = textureView.getSurfaceTexture(); assert texture != null; // We configure the size of default buffer to be the size of camera preview we want. texture.setDefaultBufferSize(mPreviewSize.getWidth(), mPreviewSize.getHeight()); // This is the output Surface we need to start preview. Surface surface = new Surface(texture); // We set up a CaptureRequest.Builder with the output Surface. mPreviewRequestBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW); mPreviewRequestBuilder.addTarget(surface); // Here, we create a CameraCaptureSession for camera preview. mCameraDevice.createCaptureSession(Arrays.asList(surface, imageReader.getSurface()), new CameraCaptureSession.StateCallback() { @Override public void onConfigured(@NonNull CameraCaptureSession cameraCaptureSession) { // The camera is already closed if (null == mCameraDevice) { return; } // When the session is ready, we start displaying the preview. mCaptureSession = cameraCaptureSession; try { // Auto focus should be continuous for camera preview. mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE); // Flash is automatically enabled when necessary. setAutoFlash(mPreviewRequestBuilder); // Finally, we start displaying the camera preview. mPreviewRequest = mPreviewRequestBuilder.build(); mCaptureSession.setRepeatingRequest(mPreviewRequest, mCaptureCallback, backgroundHandler); } catch (CameraAccessException e) { e.printStackTrace(); } } @Override public void onConfigureFailed(@NonNull CameraCaptureSession cameraCaptureSession) { Log.d(TAG, "Configuration Failed"); } }, null ); } catch (CameraAccessException e) { e.printStackTrace(); } } private void configureTransform(int viewWidth, int viewHeight) { if (null == textureView || null == mPreviewSize) { return; } int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();//getWindowManager().getDefaultDisplay().getRotation(); Matrix matrix = new Matrix(); RectF viewRect = new RectF(0, 0, viewWidth, viewHeight); RectF bufferRect = new RectF(0, 0, mPreviewSize.getHeight(), mPreviewSize.getWidth()); float centerX = viewRect.centerX(); float centerY = viewRect.centerY(); if (Surface.ROTATION_90 == rotation || Surface.ROTATION_270 == rotation) { bufferRect.offset(centerX - bufferRect.centerX(), centerY - bufferRect.centerY()); matrix.setRectToRect(viewRect, bufferRect, Matrix.ScaleToFit.FILL); float scale = Math.max( (float) viewHeight / mPreviewSize.getHeight(), (float) viewWidth / mPreviewSize.getWidth()); matrix.postScale(scale, scale, centerX, centerY); matrix.postRotate(90 * (rotation - 2), centerX, centerY); } else if (Surface.ROTATION_180 == rotation) { matrix.postRotate(180, centerX, centerY); } textureView.setTransform(matrix); } public void takePicture() { try { // This is how to tell the camera to lock focus. mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_TRIGGER, CameraMetadata.CONTROL_AF_TRIGGER_START); // Tell #mCaptureCallback to wait for the lock. mState = STATE_WAITING_LOCK; mCaptureSession.capture(mPreviewRequestBuilder.build(), mCaptureCallback, backgroundHandler); } catch (CameraAccessException e) { e.printStackTrace(); } Toast.makeText(activity.getApplicationContext(), file.getAbsolutePath(), Toast.LENGTH_SHORT).show(); } private void runPrecaptureSequence() { try { // This is how to tell the camera to trigger. mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AE_PRECAPTURE_TRIGGER, CaptureRequest.CONTROL_AE_PRECAPTURE_TRIGGER_START); // Tell #mCaptureCallback to wait for the precapture sequence to be set. mState = STATE_WAITING_PRECAPTURE; mCaptureSession.capture(mPreviewRequestBuilder.build(), mCaptureCallback, backgroundHandler); } catch (CameraAccessException e) { e.printStackTrace(); } } private void captureStillPicture() { try { if (null == mCameraDevice) { return; } // This is the CaptureRequest.Builder that we use to take a picture. final CaptureRequest.Builder captureBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE); captureBuilder.addTarget(imageReader.getSurface()); // Use the same AE and AF modes as the preview. captureBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE); setAutoFlash(captureBuilder); // Orientation int rotation = textureView.getDisplay().getRotation();//getWindowManager().getDefaultDisplay().getRotation(); captureBuilder.set(CaptureRequest.JPEG_ORIENTATION, getOrientation(rotation)); CameraCaptureSession.CaptureCallback CaptureCallback = new CameraCaptureSession.CaptureCallback() { @Override public void onCaptureCompleted(@NonNull CameraCaptureSession session, @NonNull CaptureRequest request, @NonNull TotalCaptureResult result) { Log.d(TAG, file.toString()); try { // Reset the auto-focus trigger mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_TRIGGER, CameraMetadata.CONTROL_AF_TRIGGER_CANCEL); setAutoFlash(mPreviewRequestBuilder); mCaptureSession.capture(mPreviewRequestBuilder.build(), mCaptureCallback, backgroundHandler); // After this, the camera will go back to the normal state of preview. mState = STATE_PREVIEW; mCaptureSession.setRepeatingRequest(mPreviewRequest, mCaptureCallback, backgroundHandler); } catch (CameraAccessException e) { e.printStackTrace(); } } }; mCaptureSession.stopRepeating(); mCaptureSession.capture(captureBuilder.build(), CaptureCallback, null); } catch (CameraAccessException e) { e.printStackTrace(); } } private int getOrientation(int rotation) { // Sensor orientation is 90 for most devices, or 270 for some devices (eg. Nexus 5X) // We have to take that into account and rotate JPEG properly. // For devices with orientation of 90, we simply return our mapping from ORIENTATIONS. // For devices with orientation of 270, we need to rotate the JPEG 180 degrees. return (ORIENTATIONS.get(rotation) + mSensorOrientation + 270) % 360; } private void setAutoFlash(CaptureRequest.Builder requestBuilder) { if (mFlashSupported) { requestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest.CONTROL_AE_MODE_ON_AUTO_FLASH); } } private static class ImageSaver implements Runnable { /** * The JPEG image */ private final Image mImage; /** * The file we save the image into. */ private final File mFile; public ImageSaver(Image image, File file) { mImage = image; mFile = file; } @Override public void run() { ByteBuffer buffer = mImage.getPlanes()[0].getBuffer(); byte[] bytes = new byte[buffer.remaining()]; buffer.get(bytes); FileOutputStream output = null; try { output = new FileOutputStream(mFile); output.write(bytes); } catch (IOException e) { e.printStackTrace(); } finally { mImage.close(); if (null != output) { try { output.close(); } catch (IOException e) { e.printStackTrace(); } } } } } static class CompareSizesByArea implements Comparator<Size> { @Override public int compare(Size lhs, Size rhs) { // We cast here to ensure the multiplications won't overflow return Long.signum((long) lhs.getWidth() * lhs.getHeight() - (long) rhs.getWidth() * rhs.getHeight()); } } private File getOutputMediaFile() { // To be safe, you should check that the SDCard is mounted // using Environment.getExternalStorageState() before doing this. File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "Camera2Test"); // This location works best if you want the created images to be shared // between applications and persist after your app has been uninstalled. // Create the storage directory if it does not exist if (!mediaStorageDir.exists()) { if (!mediaStorageDir.mkdirs()) { return null; } } // Create a media file name String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()); File mediaFile; mediaFile = new File(mediaStorageDir.getPath() + File.separator + "IMG_" + timeStamp + ".jpg"); return mediaFile; } } 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662 package com.zatackcoder.camera2test; import android.Manifest;import android.app.Activity;import android.content.Context;import android.content.pm.PackageManager;import android.content.res.Configuration;import android.graphics.ImageFormat;import android.graphics.Matrix;import android.graphics.Point;import android.graphics.RectF;import android.graphics.SurfaceTexture;import android.hardware.camera2.CameraAccessException;import android.hardware.camera2.CameraCaptureSession;import android.hardware.camera2.CameraCharacteristics;import android.hardware.camera2.CameraDevice;import android.hardware.camera2.CameraManager;import android.hardware.camera2.CameraMetadata;import android.hardware.camera2.CaptureRequest;import android.hardware.camera2.CaptureResult;import android.hardware.camera2.TotalCaptureResult;import android.hardware.camera2.params.StreamConfigurationMap;import android.media.Image;import android.media.ImageReader;import android.os.Build;import android.os.Environment;import android.os.Handler;import android.os.HandlerThread;import android.support.annotation.NonNull;import android.support.annotation.RequiresApi;import android.support.v4.content.ContextCompat;import android.util.Log;import android.util.Size;import android.util.SparseIntArray;import android.view.Surface;import android.view.TextureView;import android.widget.Toast; import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.nio.ByteBuffer;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Arrays;import java.util.Collections;import java.util.Comparator;import java.util.Date;import java.util.List;import java.util.concurrent.Semaphore;import java.util.concurrent.TimeUnit; /** * Created by rajesh kumar sahanee on 2/9/17. */ @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)public class CameraControllerV2WithPreview { Activity activity; /** * Conversion from screen rotation to JPEG orientation. */ private static final SparseIntArray ORIENTATIONS = new SparseIntArray(); static { ORIENTATIONS.append(Surface.ROTATION_0, 90); ORIENTATIONS.append(Surface.ROTATION_90, 0); ORIENTATIONS.append(Surface.ROTATION_180, 270); ORIENTATIONS.append(Surface.ROTATION_270, 180); } private static final String TAG = "CCV2WithPreview"; private static final int STATE_PREVIEW = 0; private static final int STATE_WAITING_LOCK = 1; private static final int STATE_WAITING_PRECAPTURE = 2; private static final int STATE_WAITING_NON_PRECAPTURE = 3; private static final int STATE_PICTURE_TAKEN = 4; private static final int MAX_PREVIEW_WIDTH = 1920; private static final int MAX_PREVIEW_HEIGHT = 1080; private AutoFitTextureView textureView; private String mCameraId; private CameraCaptureSession mCaptureSession; private CameraDevice mCameraDevice; private Size mPreviewSize; private HandlerThread backgroundThread; private Handler backgroundHandler; private ImageReader imageReader; private File file; private CaptureRequest.Builder mPreviewRequestBuilder; private CaptureRequest mPreviewRequest; private int mState = STATE_PREVIEW; private Semaphore mCameraOpenCloseLock = new Semaphore(1); private boolean mFlashSupported; private int mSensorOrientation; public CameraControllerV2WithPreview(Activity activity, AutoFitTextureView textureView) { this.activity = activity; this.textureView = textureView; this.textureView.setSurfaceTextureListener(mSurfaceTextureListener); file = getOutputMediaFile(); } private final TextureView.SurfaceTextureListener mSurfaceTextureListener = new TextureView.SurfaceTextureListener() { @Override public void onSurfaceTextureAvailable(SurfaceTexture texture, int width, int height) { openCamera(width, height); } @Override public void onSurfaceTextureSizeChanged(SurfaceTexture texture, int width, int height) { configureTransform(width, height); } @Override public boolean onSurfaceTextureDestroyed(SurfaceTexture texture) { return true; } @Override public void onSurfaceTextureUpdated(SurfaceTexture texture) { } }; private final CameraDevice.StateCallback mStateCallback = new CameraDevice.StateCallback() { @Override public void onOpened(@NonNull CameraDevice cameraDevice) { // This method is called when the camera is opened. We start camera preview here. mCameraOpenCloseLock.release(); mCameraDevice = cameraDevice; createCameraPreviewSession(); } @Override public void onDisconnected(@NonNull CameraDevice cameraDevice) { mCameraOpenCloseLock.release(); cameraDevice.close(); mCameraDevice = null; } @Override public void onError(@NonNull CameraDevice cameraDevice, int error) { mCameraOpenCloseLock.release(); cameraDevice.close(); mCameraDevice = null; if(activity != null) { activity.finish(); } } }; private final ImageReader.OnImageAvailableListener mOnImageAvailableListener = new ImageReader.OnImageAvailableListener() { @Override public void onImageAvailable(ImageReader reader) { Log.d(TAG, "ImageAvailable"); backgroundHandler.post(new ImageSaver(reader.acquireNextImage(), file)); } }; private CameraCaptureSession.CaptureCallback mCaptureCallback = new CameraCaptureSession.CaptureCallback() { private void process(CaptureResult result) { switch (mState) { case STATE_PREVIEW: { // We have nothing to do when the camera preview is working normally. Log.d(TAG, "STATE_PREVIEW"); break; } case STATE_WAITING_LOCK: { Integer afState = result.get(CaptureResult.CONTROL_AF_STATE); if (afState == null) { captureStillPicture(); } else if (CaptureResult.CONTROL_AF_STATE_FOCUSED_LOCKED == afState || CaptureResult.CONTROL_AF_STATE_NOT_FOCUSED_LOCKED == afState) { // CONTROL_AE_STATE can be null on some devices Integer aeState = result.get(CaptureResult.CONTROL_AE_STATE); if (aeState == null || aeState == CaptureResult.CONTROL_AE_STATE_CONVERGED) { mState = STATE_PICTURE_TAKEN; captureStillPicture(); } else { runPrecaptureSequence(); } } Log.d(TAG, "STATE_WAITING_LOCK"); break; } case STATE_WAITING_PRECAPTURE: { // CONTROL_AE_STATE can be null on some devices Integer aeState = result.get(CaptureResult.CONTROL_AE_STATE); if (aeState == null || aeState == CaptureResult.CONTROL_AE_STATE_PRECAPTURE || aeState == CaptureRequest.CONTROL_AE_STATE_FLASH_REQUIRED) { mState = STATE_WAITING_NON_PRECAPTURE; } Log.d(TAG, "STATE_WAITING_PRECAPTURE"); break; } case STATE_WAITING_NON_PRECAPTURE: { // CONTROL_AE_STATE can be null on some devices Integer aeState = result.get(CaptureResult.CONTROL_AE_STATE); if (aeState == null || aeState != CaptureResult.CONTROL_AE_STATE_PRECAPTURE) { mState = STATE_PICTURE_TAKEN; captureStillPicture(); } Log.d(TAG, "STATE_WAITING_NON_PRECAPTURE"); break; } } } @Override public void onCaptureProgressed(@NonNull CameraCaptureSession session, @NonNull CaptureRequest request, @NonNull CaptureResult partialResult) { process(partialResult); } @Override public void onCaptureCompleted(@NonNull CameraCaptureSession session, @NonNull CaptureRequest request, @NonNull TotalCaptureResult result) { process(result); } }; private static Size chooseOptimalSize(Size[] choices, int textureViewWidth, int textureViewHeight, int maxWidth, int maxHeight, Size aspectRatio) { // Collect the supported resolutions that are at least as big as the preview Surface List<Size> bigEnough = new ArrayList<>(); // Collect the supported resolutions that are smaller than the preview Surface List<Size> notBigEnough = new ArrayList<>(); int w = aspectRatio.getWidth(); int h = aspectRatio.getHeight(); for (Size option : choices) { if (option.getWidth() <= maxWidth && option.getHeight() <= maxHeight && option.getHeight() == option.getWidth() * h / w) { if (option.getWidth() >= textureViewWidth && option.getHeight() >= textureViewHeight) { bigEnough.add(option); } else { notBigEnough.add(option); } } } // Pick the smallest of those big enough. If there is no one big enough, pick the // largest of those not big enough. if (bigEnough.size() > 0) { return Collections.min(bigEnough, new CompareSizesByArea()); } else if (notBigEnough.size() > 0) { return Collections.max(notBigEnough, new CompareSizesByArea()); } else { Log.e(TAG, "Couldn't find any suitable preview size"); return choices[0]; } } private void setUpCameraOutputs(int width, int height) { CameraManager manager = (CameraManager) activity.getSystemService(Context.CAMERA_SERVICE); try { for (String cameraId : manager.getCameraIdList()) { CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraId); // We don't use a front facing camera in this sample. Integer facing = characteristics.get(CameraCharacteristics.LENS_FACING); if (facing != null && facing == CameraCharacteristics.LENS_FACING_FRONT) { continue; } StreamConfigurationMap map = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP); if (map == null) { continue; } // For still image captures, we use the largest available size. Size largest = Collections.max(Arrays.asList(map.getOutputSizes(ImageFormat.JPEG)), new CompareSizesByArea()); imageReader = ImageReader.newInstance(largest.getWidth(), largest.getHeight(), ImageFormat.JPEG, /*maxImages*/2); imageReader.setOnImageAvailableListener(mOnImageAvailableListener, backgroundHandler); // Find out if we need to swap dimension to get the preview size relative to sensor // coordinate. int displayRotation = activity.getWindowManager().getDefaultDisplay().getRotation();//getWindowManager().getDefaultDisplay().getRotation(); //noinspection ConstantConditions mSensorOrientation = characteristics.get(CameraCharacteristics.SENSOR_ORIENTATION); boolean swappedDimensions = false; switch (displayRotation) { case Surface.ROTATION_0: case Surface.ROTATION_180: if (mSensorOrientation == 90 || mSensorOrientation == 270) { swappedDimensions = true; } break; case Surface.ROTATION_90: case Surface.ROTATION_270: if (mSensorOrientation == 0 || mSensorOrientation == 180) { swappedDimensions = true; } break; default: Log.e(TAG, "Display rotation is invalid: " + displayRotation); } Point displaySize = new Point(); activity.getWindowManager().getDefaultDisplay().getSize(displaySize);//getWindowManager().getDefaultDisplay().getSize(displaySize); int rotatedPreviewWidth = width; int rotatedPreviewHeight = height; int maxPreviewWidth = displaySize.x; int maxPreviewHeight = displaySize.y; if (swappedDimensions) { rotatedPreviewWidth = height; rotatedPreviewHeight = width; maxPreviewWidth = displaySize.y; maxPreviewHeight = displaySize.x; } if (maxPreviewWidth > MAX_PREVIEW_WIDTH) { maxPreviewWidth = MAX_PREVIEW_WIDTH; } if (maxPreviewHeight > MAX_PREVIEW_HEIGHT) { maxPreviewHeight = MAX_PREVIEW_HEIGHT; } // Danger, W.R.! Attempting to use too large a preview size could exceed the camera // bus' bandwidth limitation, resulting in gorgeous previews but the storage of // garbage capture data. mPreviewSize = chooseOptimalSize(map.getOutputSizes(SurfaceTexture.class), rotatedPreviewWidth, rotatedPreviewHeight, maxPreviewWidth, maxPreviewHeight, largest); // We fit the aspect ratio of TextureView to the size of preview we picked. int orientation = activity.getResources().getConfiguration().orientation; if (orientation == Configuration.ORIENTATION_LANDSCAPE) { textureView.setAspectRatio(mPreviewSize.getWidth(), mPreviewSize.getHeight()); } else { textureView.setAspectRatio(mPreviewSize.getHeight(), mPreviewSize.getWidth()); } // Check if the flash is supported. Boolean available = characteristics.get(CameraCharacteristics.FLASH_INFO_AVAILABLE); mFlashSupported = available == null ? false : available; mCameraId = cameraId; return; } } catch (CameraAccessException e) { e.printStackTrace(); } catch (NullPointerException e) { // Currently an NPE is thrown when the Camera2API is used but not supported on the // device this code runs. e.printStackTrace(); } } public void openCamera(int width, int height) { if (ContextCompat.checkSelfPermission(activity, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) { return; } setUpCameraOutputs(width, height); configureTransform(width, height); CameraManager manager = (CameraManager) activity.getSystemService(Context.CAMERA_SERVICE); try { if (!mCameraOpenCloseLock.tryAcquire(2500, TimeUnit.MILLISECONDS)) { throw new RuntimeException("Time out waiting to lock camera opening."); } startBackgroundThread(); manager.openCamera(mCameraId, mStateCallback, backgroundHandler); } catch (CameraAccessException e) { e.printStackTrace(); } catch (InterruptedException e) { throw new RuntimeException("Interrupted while trying to lock camera opening.", e); } } public void closeCamera() { try { mCameraOpenCloseLock.acquire(); if (null != mCaptureSession) { mCaptureSession.close(); mCaptureSession = null; } if (null != mCameraDevice) { mCameraDevice.close(); mCameraDevice = null; } if (null != imageReader) { imageReader.close(); imageReader = null; } } catch (InterruptedException e) { throw new RuntimeException("Interrupted while trying to lock camera closing.", e); } finally { mCameraOpenCloseLock.release(); stopBackgroundThread(); } } private void startBackgroundThread() { backgroundThread = new HandlerThread("CameraBackground"); backgroundThread.start(); backgroundHandler = new Handler(backgroundThread.getLooper()); } private void stopBackgroundThread() { backgroundThread.quitSafely(); try { backgroundThread.join(); backgroundThread = null; backgroundHandler = null; } catch (InterruptedException e) { e.printStackTrace(); } } private void createCameraPreviewSession() { try { SurfaceTexture texture = textureView.getSurfaceTexture(); assert texture != null; // We configure the size of default buffer to be the size of camera preview we want. texture.setDefaultBufferSize(mPreviewSize.getWidth(), mPreviewSize.getHeight()); // This is the output Surface we need to start preview. Surface surface = new Surface(texture); // We set up a CaptureRequest.Builder with the output Surface. mPreviewRequestBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW); mPreviewRequestBuilder.addTarget(surface); // Here, we create a CameraCaptureSession for camera preview. mCameraDevice.createCaptureSession(Arrays.asList(surface, imageReader.getSurface()), new CameraCaptureSession.StateCallback() { @Override public void onConfigured(@NonNull CameraCaptureSession cameraCaptureSession) { // The camera is already closed if (null == mCameraDevice) { return; } // When the session is ready, we start displaying the preview. mCaptureSession = cameraCaptureSession; try { // Auto focus should be continuous for camera preview. mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE); // Flash is automatically enabled when necessary. setAutoFlash(mPreviewRequestBuilder); // Finally, we start displaying the camera preview. mPreviewRequest = mPreviewRequestBuilder.build(); mCaptureSession.setRepeatingRequest(mPreviewRequest, mCaptureCallback, backgroundHandler); } catch (CameraAccessException e) { e.printStackTrace(); } } @Override public void onConfigureFailed(@NonNull CameraCaptureSession cameraCaptureSession) { Log.d(TAG, "Configuration Failed"); } }, null ); } catch (CameraAccessException e) { e.printStackTrace(); } } private void configureTransform(int viewWidth, int viewHeight) { if (null == textureView || null == mPreviewSize) { return; } int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();//getWindowManager().getDefaultDisplay().getRotation(); Matrix matrix = new Matrix(); RectF viewRect = new RectF(0, 0, viewWidth, viewHeight); RectF bufferRect = new RectF(0, 0, mPreviewSize.getHeight(), mPreviewSize.getWidth()); float centerX = viewRect.centerX(); float centerY = viewRect.centerY(); if (Surface.ROTATION_90 == rotation || Surface.ROTATION_270 == rotation) { bufferRect.offset(centerX - bufferRect.centerX(), centerY - bufferRect.centerY()); matrix.setRectToRect(viewRect, bufferRect, Matrix.ScaleToFit.FILL); float scale = Math.max( (float) viewHeight / mPreviewSize.getHeight(), (float) viewWidth / mPreviewSize.getWidth()); matrix.postScale(scale, scale, centerX, centerY); matrix.postRotate(90 * (rotation - 2), centerX, centerY); } else if (Surface.ROTATION_180 == rotation) { matrix.postRotate(180, centerX, centerY); } textureView.setTransform(matrix); } public void takePicture() { try { // This is how to tell the camera to lock focus. mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_TRIGGER, CameraMetadata.CONTROL_AF_TRIGGER_START); // Tell #mCaptureCallback to wait for the lock. mState = STATE_WAITING_LOCK; mCaptureSession.capture(mPreviewRequestBuilder.build(), mCaptureCallback, backgroundHandler); } catch (CameraAccessException e) { e.printStackTrace(); } Toast.makeText(activity.getApplicationContext(), file.getAbsolutePath(), Toast.LENGTH_SHORT).show(); } private void runPrecaptureSequence() { try { // This is how to tell the camera to trigger. mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AE_PRECAPTURE_TRIGGER, CaptureRequest.CONTROL_AE_PRECAPTURE_TRIGGER_START); // Tell #mCaptureCallback to wait for the precapture sequence to be set. mState = STATE_WAITING_PRECAPTURE; mCaptureSession.capture(mPreviewRequestBuilder.build(), mCaptureCallback, backgroundHandler); } catch (CameraAccessException e) { e.printStackTrace(); } } private void captureStillPicture() { try { if (null == mCameraDevice) { return; } // This is the CaptureRequest.Builder that we use to take a picture. final CaptureRequest.Builder captureBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE); captureBuilder.addTarget(imageReader.getSurface()); // Use the same AE and AF modes as the preview. captureBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE); setAutoFlash(captureBuilder); // Orientation int rotation = textureView.getDisplay().getRotation();//getWindowManager().getDefaultDisplay().getRotation(); captureBuilder.set(CaptureRequest.JPEG_ORIENTATION, getOrientation(rotation)); CameraCaptureSession.CaptureCallback CaptureCallback = new CameraCaptureSession.CaptureCallback() { @Override public void onCaptureCompleted(@NonNull CameraCaptureSession session, @NonNull CaptureRequest request, @NonNull TotalCaptureResult result) { Log.d(TAG, file.toString()); try { // Reset the auto-focus trigger mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_TRIGGER, CameraMetadata.CONTROL_AF_TRIGGER_CANCEL); setAutoFlash(mPreviewRequestBuilder); mCaptureSession.capture(mPreviewRequestBuilder.build(), mCaptureCallback, backgroundHandler); // After this, the camera will go back to the normal state of preview. mState = STATE_PREVIEW; mCaptureSession.setRepeatingRequest(mPreviewRequest, mCaptureCallback, backgroundHandler); } catch (CameraAccessException e) { e.printStackTrace(); } } }; mCaptureSession.stopRepeating(); mCaptureSession.capture(captureBuilder.build(), CaptureCallback, null); } catch (CameraAccessException e) { e.printStackTrace(); } } private int getOrientation(int rotation) { // Sensor orientation is 90 for most devices, or 270 for some devices (eg. Nexus 5X) // We have to take that into account and rotate JPEG properly. // For devices with orientation of 90, we simply return our mapping from ORIENTATIONS. // For devices with orientation of 270, we need to rotate the JPEG 180 degrees. return (ORIENTATIONS.get(rotation) + mSensorOrientation + 270) % 360; } private void setAutoFlash(CaptureRequest.Builder requestBuilder) { if (mFlashSupported) { requestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest.CONTROL_AE_MODE_ON_AUTO_FLASH); } } private static class ImageSaver implements Runnable { /** * The JPEG image */ private final Image mImage; /** * The file we save the image into. */ private final File mFile; public ImageSaver(Image image, File file) { mImage = image; mFile = file; } @Override public void run() { ByteBuffer buffer = mImage.getPlanes()[0].getBuffer(); byte[] bytes = new byte[buffer.remaining()]; buffer.get(bytes); FileOutputStream output = null; try { output = new FileOutputStream(mFile); output.write(bytes); } catch (IOException e) { e.printStackTrace(); } finally { mImage.close(); if (null != output) { try { output.close(); } catch (IOException e) { e.printStackTrace(); } } } } } static class CompareSizesByArea implements Comparator<Size> { @Override public int compare(Size lhs, Size rhs) { // We cast here to ensure the multiplications won't overflow return Long.signum((long) lhs.getWidth() * lhs.getHeight() - (long) rhs.getWidth() * rhs.getHeight()); } } private File getOutputMediaFile() { // To be safe, you should check that the SDCard is mounted // using Environment.getExternalStorageState() before doing this. File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "Camera2Test"); // This location works best if you want the created images to be shared // between applications and persist after your app has been uninstalled. // Create the storage directory if it does not exist if (!mediaStorageDir.exists()) { if (!mediaStorageDir.mkdirs()) { return null; } } // Create a media file name String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()); File mediaFile; mediaFile = new File(mediaStorageDir.getPath() + File.separator + "IMG_" + timeStamp + ".jpg"); return mediaFile; } } CameraControllerV2WithoutPreview.java CameraControllerV2WithoutPreview.java Java package com.zatackcoder.camera2test; import android.Manifest; import android.content.Context; import android.content.pm.PackageManager; import android.graphics.ImageFormat; import android.hardware.camera2.CameraAccessException; import android.hardware.camera2.CameraCaptureSession; import android.hardware.camera2.CameraCharacteristics; import android.hardware.camera2.CameraDevice; import android.hardware.camera2.CameraManager; import android.hardware.camera2.CaptureRequest; import android.hardware.camera2.TotalCaptureResult; import android.hardware.camera2.params.StreamConfigurationMap; import android.media.Image; import android.media.ImageReader; import android.os.Build; import android.os.Environment; import android.os.Handler; import android.os.HandlerThread; import android.support.annotation.NonNull; import android.support.annotation.RequiresApi; import android.support.v4.content.ContextCompat; import android.util.Log; import android.util.Size; import android.widget.Toast; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.nio.ByteBuffer; import java.text.SimpleDateFormat; import java.util.Arrays; import java.util.Collections; import java.util.Comparator; import java.util.Date; import java.util.concurrent.Semaphore; import java.util.concurrent.TimeUnit; /** * Created by rajesh kumar sahanee on 2/9/17. */ @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP) public class CameraControllerV2WithoutPreview { Context context; private static final String TAG = "CCV2WithoutPreview"; private String mCameraId; private CameraCaptureSession mCaptureSession; private CameraDevice mCameraDevice; private HandlerThread backgroundThread; private Handler backgroundHandler; private ImageReader imageReader; private File file; private Semaphore mCameraOpenCloseLock = new Semaphore(1); public CameraControllerV2WithoutPreview(Context context) { this.context = context; } public void openCamera() { if (ContextCompat.checkSelfPermission(context, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) { return; } setUpCameraOutputs(); CameraManager manager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE); try { if (!mCameraOpenCloseLock.tryAcquire(2500, TimeUnit.MILLISECONDS)) { throw new RuntimeException("Time out waiting to lock camera opening."); } startBackgroundThread(); manager.openCamera(mCameraId, mStateCallback, backgroundHandler); } catch (CameraAccessException e) { e.printStackTrace(); } catch (InterruptedException e) { throw new RuntimeException("Interrupted while trying to lock camera opening.", e); } } private void setUpCameraOutputs() { CameraManager manager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE); try { for (String cameraId : manager.getCameraIdList()) { CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraId); // We don't use a front facing camera in this sample. Integer facing = characteristics.get(CameraCharacteristics.LENS_FACING); if (facing != null && facing == CameraCharacteristics.LENS_FACING_FRONT) { continue; } StreamConfigurationMap map = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP); if (map == null) { continue; } // For still image captures, we use the largest available size. Size largest = Collections.max(Arrays.asList(map.getOutputSizes(ImageFormat.JPEG)), new CompareSizesByArea()); imageReader = ImageReader.newInstance(largest.getWidth(), largest.getHeight(), ImageFormat.JPEG, /*maxImages*/2); imageReader.setOnImageAvailableListener(mOnImageAvailableListener, backgroundHandler); mCameraId = cameraId; return; } } catch (CameraAccessException e) { e.printStackTrace(); } catch (NullPointerException e) { // Currently an NPE is thrown when the Camera2API is used but not supported on the // device this code runs. e.printStackTrace(); } } private final CameraDevice.StateCallback mStateCallback = new CameraDevice.StateCallback() { @Override public void onOpened(@NonNull CameraDevice cameraDevice) { // This method is called when the camera is opened. We start camera preview here. mCameraOpenCloseLock.release(); mCameraDevice = cameraDevice; createCameraCaptureSession(); } @Override public void onDisconnected(@NonNull CameraDevice cameraDevice) { mCameraOpenCloseLock.release(); cameraDevice.close(); mCameraDevice = null; } @Override public void onError(@NonNull CameraDevice cameraDevice, int error) { mCameraOpenCloseLock.release(); cameraDevice.close(); mCameraDevice = null; } }; private final ImageReader.OnImageAvailableListener mOnImageAvailableListener = new ImageReader.OnImageAvailableListener() { @Override public void onImageAvailable(ImageReader reader) { Log.d(TAG, "ImageAvailable"); backgroundHandler.post(new ImageSaver(reader.acquireNextImage(), file)); } }; public void closeCamera() { try { mCameraOpenCloseLock.acquire(); if (null != mCaptureSession) { mCaptureSession.close(); mCaptureSession = null; } if (null != mCameraDevice) { mCameraDevice.close(); mCameraDevice = null; } if (null != imageReader) { imageReader.close(); imageReader = null; } } catch (InterruptedException e) { throw new RuntimeException("Interrupted while trying to lock camera closing.", e); } finally { mCameraOpenCloseLock.release(); stopBackgroundThread(); } } private void startBackgroundThread() { backgroundThread = new HandlerThread("CameraBackground"); backgroundThread.start(); backgroundHandler = new Handler(backgroundThread.getLooper()); } private void stopBackgroundThread() { backgroundThread.quitSafely(); try { backgroundThread.join(); backgroundThread = null; backgroundHandler = null; } catch (InterruptedException e) { e.printStackTrace(); } } private void createCameraCaptureSession() { try { // Here, we create a CameraCaptureSession for camera preview. mCameraDevice.createCaptureSession(Arrays.asList(imageReader.getSurface()), new CameraCaptureSession.StateCallback() { @Override public void onConfigured(@NonNull CameraCaptureSession cameraCaptureSession) { // The camera is already closed if (null == mCameraDevice) { return; } // When the session is ready, we start displaying the preview. mCaptureSession = cameraCaptureSession; } @Override public void onConfigureFailed(@NonNull CameraCaptureSession cameraCaptureSession) { Log.d(TAG, "Configuration Failed"); } }, null ); } catch (CameraAccessException e) { e.printStackTrace(); } } public void takePicture() { file = getOutputMediaFile(); try { if (null == mCameraDevice) { return; } // This is the CaptureRequest.Builder that we use to take a picture. final CaptureRequest.Builder captureBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE); captureBuilder.addTarget(imageReader.getSurface()); // Use the same AE and AF modes as the preview. captureBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE); CameraCaptureSession.CaptureCallback CaptureCallback = new CameraCaptureSession.CaptureCallback() { @Override public void onCaptureCompleted(@NonNull CameraCaptureSession session, @NonNull CaptureRequest request, @NonNull TotalCaptureResult result) { Log.d(TAG, file.toString()); } }; mCaptureSession.stopRepeating(); mCaptureSession.capture(captureBuilder.build(), CaptureCallback, null); } catch (CameraAccessException e) { e.printStackTrace(); } Toast.makeText(context, file.getAbsolutePath(), Toast.LENGTH_SHORT).show(); } private static class ImageSaver implements Runnable { /** * The JPEG image */ private final Image mImage; /** * The file we save the image into. */ private final File mFile; public ImageSaver(Image image, File file) { mImage = image; mFile = file; } @Override public void run() { ByteBuffer buffer = mImage.getPlanes()[0].getBuffer(); byte[] bytes = new byte[buffer.remaining()]; buffer.get(bytes); FileOutputStream output = null; try { output = new FileOutputStream(mFile); output.write(bytes); } catch (IOException e) { e.printStackTrace(); } finally { mImage.close(); if (null != output) { try { output.close(); } catch (IOException e) { e.printStackTrace(); } } } } } static class CompareSizesByArea implements Comparator<Size> { @Override public int compare(Size lhs, Size rhs) { // We cast here to ensure the multiplications won't overflow return Long.signum((long) lhs.getWidth() * lhs.getHeight() - (long) rhs.getWidth() * rhs.getHeight()); } } private File getOutputMediaFile() { // To be safe, you should check that the SDCard is mounted // using Environment.getExternalStorageState() before doing this. File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "Camera2Test"); // This location works best if you want the created images to be shared // between applications and persist after your app has been uninstalled. // Create the storage directory if it does not exist if (!mediaStorageDir.exists()) { if (!mediaStorageDir.mkdirs()) { return null; } } // Create a media file name String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()); File mediaFile; mediaFile = new File(mediaStorageDir.getPath() + File.separator + "IMG_" + timeStamp + ".jpg"); return mediaFile; } } 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331 package com.zatackcoder.camera2test; import android.Manifest;import android.content.Context;import android.content.pm.PackageManager;import android.graphics.ImageFormat;import android.hardware.camera2.CameraAccessException;import android.hardware.camera2.CameraCaptureSession;import android.hardware.camera2.CameraCharacteristics;import android.hardware.camera2.CameraDevice;import android.hardware.camera2.CameraManager;import android.hardware.camera2.CaptureRequest;import android.hardware.camera2.TotalCaptureResult;import android.hardware.camera2.params.StreamConfigurationMap;import android.media.Image;import android.media.ImageReader;import android.os.Build;import android.os.Environment;import android.os.Handler;import android.os.HandlerThread;import android.support.annotation.NonNull;import android.support.annotation.RequiresApi;import android.support.v4.content.ContextCompat;import android.util.Log;import android.util.Size;import android.widget.Toast; import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.nio.ByteBuffer;import java.text.SimpleDateFormat;import java.util.Arrays;import java.util.Collections;import java.util.Comparator;import java.util.Date;import java.util.concurrent.Semaphore;import java.util.concurrent.TimeUnit; /** * Created by rajesh kumar sahanee on 2/9/17. */ @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)public class CameraControllerV2WithoutPreview { Context context; private static final String TAG = "CCV2WithoutPreview"; private String mCameraId; private CameraCaptureSession mCaptureSession; private CameraDevice mCameraDevice; private HandlerThread backgroundThread; private Handler backgroundHandler; private ImageReader imageReader; private File file; private Semaphore mCameraOpenCloseLock = new Semaphore(1); public CameraControllerV2WithoutPreview(Context context) { this.context = context; } public void openCamera() { if (ContextCompat.checkSelfPermission(context, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) { return; } setUpCameraOutputs(); CameraManager manager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE); try { if (!mCameraOpenCloseLock.tryAcquire(2500, TimeUnit.MILLISECONDS)) { throw new RuntimeException("Time out waiting to lock camera opening."); } startBackgroundThread(); manager.openCamera(mCameraId, mStateCallback, backgroundHandler); } catch (CameraAccessException e) { e.printStackTrace(); } catch (InterruptedException e) { throw new RuntimeException("Interrupted while trying to lock camera opening.", e); } } private void setUpCameraOutputs() { CameraManager manager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE); try { for (String cameraId : manager.getCameraIdList()) { CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraId); // We don't use a front facing camera in this sample. Integer facing = characteristics.get(CameraCharacteristics.LENS_FACING); if (facing != null && facing == CameraCharacteristics.LENS_FACING_FRONT) { continue; } StreamConfigurationMap map = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP); if (map == null) { continue; } // For still image captures, we use the largest available size. Size largest = Collections.max(Arrays.asList(map.getOutputSizes(ImageFormat.JPEG)), new CompareSizesByArea()); imageReader = ImageReader.newInstance(largest.getWidth(), largest.getHeight(), ImageFormat.JPEG, /*maxImages*/2); imageReader.setOnImageAvailableListener(mOnImageAvailableListener, backgroundHandler); mCameraId = cameraId; return; } } catch (CameraAccessException e) { e.printStackTrace(); } catch (NullPointerException e) { // Currently an NPE is thrown when the Camera2API is used but not supported on the // device this code runs. e.printStackTrace(); } } private final CameraDevice.StateCallback mStateCallback = new CameraDevice.StateCallback() { @Override public void onOpened(@NonNull CameraDevice cameraDevice) { // This method is called when the camera is opened. We start camera preview here. mCameraOpenCloseLock.release(); mCameraDevice = cameraDevice; createCameraCaptureSession(); } @Override public void onDisconnected(@NonNull CameraDevice cameraDevice) { mCameraOpenCloseLock.release(); cameraDevice.close(); mCameraDevice = null; } @Override public void onError(@NonNull CameraDevice cameraDevice, int error) { mCameraOpenCloseLock.release(); cameraDevice.close(); mCameraDevice = null; } }; private final ImageReader.OnImageAvailableListener mOnImageAvailableListener = new ImageReader.OnImageAvailableListener() { @Override public void onImageAvailable(ImageReader reader) { Log.d(TAG, "ImageAvailable"); backgroundHandler.post(new ImageSaver(reader.acquireNextImage(), file)); } }; public void closeCamera() { try { mCameraOpenCloseLock.acquire(); if (null != mCaptureSession) { mCaptureSession.close(); mCaptureSession = null; } if (null != mCameraDevice) { mCameraDevice.close(); mCameraDevice = null; } if (null != imageReader) { imageReader.close(); imageReader = null; } } catch (InterruptedException e) { throw new RuntimeException("Interrupted while trying to lock camera closing.", e); } finally { mCameraOpenCloseLock.release(); stopBackgroundThread(); } } private void startBackgroundThread() { backgroundThread = new HandlerThread("CameraBackground"); backgroundThread.start(); backgroundHandler = new Handler(backgroundThread.getLooper()); } private void stopBackgroundThread() { backgroundThread.quitSafely(); try { backgroundThread.join(); backgroundThread = null; backgroundHandler = null; } catch (InterruptedException e) { e.printStackTrace(); } } private void createCameraCaptureSession() { try { // Here, we create a CameraCaptureSession for camera preview. mCameraDevice.createCaptureSession(Arrays.asList(imageReader.getSurface()), new CameraCaptureSession.StateCallback() { @Override public void onConfigured(@NonNull CameraCaptureSession cameraCaptureSession) { // The camera is already closed if (null == mCameraDevice) { return; } // When the session is ready, we start displaying the preview. mCaptureSession = cameraCaptureSession; } @Override public void onConfigureFailed(@NonNull CameraCaptureSession cameraCaptureSession) { Log.d(TAG, "Configuration Failed"); } }, null ); } catch (CameraAccessException e) { e.printStackTrace(); } } public void takePicture() { file = getOutputMediaFile(); try { if (null == mCameraDevice) { return; } // This is the CaptureRequest.Builder that we use to take a picture. final CaptureRequest.Builder captureBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE); captureBuilder.addTarget(imageReader.getSurface()); // Use the same AE and AF modes as the preview. captureBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE); CameraCaptureSession.CaptureCallback CaptureCallback = new CameraCaptureSession.CaptureCallback() { @Override public void onCaptureCompleted(@NonNull CameraCaptureSession session, @NonNull CaptureRequest request, @NonNull TotalCaptureResult result) { Log.d(TAG, file.toString()); } }; mCaptureSession.stopRepeating(); mCaptureSession.capture(captureBuilder.build(), CaptureCallback, null); } catch (CameraAccessException e) { e.printStackTrace(); } Toast.makeText(context, file.getAbsolutePath(), Toast.LENGTH_SHORT).show(); } private static class ImageSaver implements Runnable { /** * The JPEG image */ private final Image mImage; /** * The file we save the image into. */ private final File mFile; public ImageSaver(Image image, File file) { mImage = image; mFile = file; } @Override public void run() { ByteBuffer buffer = mImage.getPlanes()[0].getBuffer(); byte[] bytes = new byte[buffer.remaining()]; buffer.get(bytes); FileOutputStream output = null; try { output = new FileOutputStream(mFile); output.write(bytes); } catch (IOException e) { e.printStackTrace(); } finally { mImage.close(); if (null != output) { try { output.close(); } catch (IOException e) { e.printStackTrace(); } } } } } static class CompareSizesByArea implements Comparator<Size> { @Override public int compare(Size lhs, Size rhs) { // We cast here to ensure the multiplications won't overflow return Long.signum((long) lhs.getWidth() * lhs.getHeight() - (long) rhs.getWidth() * rhs.getHeight()); } } private File getOutputMediaFile() { // To be safe, you should check that the SDCard is mounted // using Environment.getExternalStorageState() before doing this. File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "Camera2Test"); // This location works best if you want the created images to be shared // between applications and persist after your app has been uninstalled. // Create the storage directory if it does not exist if (!mediaStorageDir.exists()) { if (!mediaStorageDir.mkdirs()) { return null; } } // Create a media file name String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()); File mediaFile; mediaFile = new File(mediaStorageDir.getPath() + File.separator + "IMG_" + timeStamp + ".jpg"); return mediaFile; } } AutoFitTextureView.java AutoFitTextureView.java Java package com.zatackcoder.camera2test; import android.content.Context; import android.util.AttributeSet; import android.view.TextureView; /** * Created by rajesh on 6/9/17. */ public class AutoFitTextureView extends TextureView { private int mRatioWidth = 0; private int mRatioHeight = 0; public AutoFitTextureView(Context context) { this(context, null); } public AutoFitTextureView(Context context, AttributeSet attrs) { this(context, attrs, 0); } public AutoFitTextureView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } /** * Sets the aspect ratio for this view. The size of the view will be measured based on the ratio * calculated from the parameters. Note that the actual sizes of parameters don't matter, that * is, calling setAspectRatio(2, 3) and setAspectRatio(4, 6) make the same result. * * @param width Relative horizontal size * @param height Relative vertical size */ public void setAspectRatio(int width, int height) { if (width < 0 || height < 0) { throw new IllegalArgumentException("Size cannot be negative."); } mRatioWidth = width; mRatioHeight = height; requestLayout(); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); int width = MeasureSpec.getSize(widthMeasureSpec); int height = MeasureSpec.getSize(heightMeasureSpec); if (0 == mRatioWidth || 0 == mRatioHeight) { setMeasuredDimension(width, height); } else { if (width < height * mRatioWidth / mRatioHeight) { setMeasuredDimension(width, width * mRatioHeight / mRatioWidth); } else { setMeasuredDimension(height * mRatioWidth / mRatioHeight, height); } } } } 12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061 package com.zatackcoder.camera2test; import android.content.Context;import android.util.AttributeSet;import android.view.TextureView; /** * Created by rajesh on 6/9/17. */ public class AutoFitTextureView extends TextureView { private int mRatioWidth = 0; private int mRatioHeight = 0; public AutoFitTextureView(Context context) { this(context, null); } public AutoFitTextureView(Context context, AttributeSet attrs) { this(context, attrs, 0); } public AutoFitTextureView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } /** * Sets the aspect ratio for this view. The size of the view will be measured based on the ratio * calculated from the parameters. Note that the actual sizes of parameters don't matter, that * is, calling setAspectRatio(2, 3) and setAspectRatio(4, 6) make the same result. * * @param width Relative horizontal size * @param height Relative vertical size */ public void setAspectRatio(int width, int height) { if (width < 0 || height < 0) { throw new IllegalArgumentException("Size cannot be negative."); } mRatioWidth = width; mRatioHeight = height; requestLayout(); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); int width = MeasureSpec.getSize(widthMeasureSpec); int height = MeasureSpec.getSize(heightMeasureSpec); if (0 == mRatioWidth || 0 == mRatioHeight) { setMeasuredDimension(width, height); } else { if (width < height * mRatioWidth / mRatioHeight) { setMeasuredDimension(width, width * mRatioHeight / mRatioWidth); } else { setMeasuredDimension(height * mRatioWidth / mRatioHeight, height); } } } } MainActivity.java MainActivity.java Java package com.zatackcoder.camera2test; import android.Manifest; import android.content.Intent; import android.content.pm.PackageManager; import android.os.Build; import android.os.Bundle; import android.support.annotation.RequiresApi; import android.support.v4.app.ActivityCompat; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.view.View; import android.widget.Switch; import android.widget.Toast; @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP) public class MainActivity extends AppCompatActivity implements ActivityCompat.OnRequestPermissionsResultCallback { CameraControllerV2WithPreview ccv2WithPreview; CameraControllerV2WithoutPreview ccv2WithoutPreview; AutoFitTextureView textureView; Switch startstoppreview; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); final Intent intent = getIntent(); boolean showpreview = intent.getBooleanExtra("showpreview", false); textureView = (AutoFitTextureView)findViewById(R.id.textureview); startstoppreview = (Switch) findViewById(R.id.startstoppreview); if(showpreview) { ccv2WithPreview = new CameraControllerV2WithPreview(MainActivity.this, textureView); startstoppreview.setChecked(true); } else { ccv2WithoutPreview = new CameraControllerV2WithoutPreview(getApplicationContext()); startstoppreview.setChecked(false); } startstoppreview.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View view) { if(startstoppreview.isChecked()) { intent.putExtra("showpreview", true); finish(); startActivity(intent); } else { intent.putExtra("showpreview", false); finish(); startActivity(intent); } } }); findViewById(R.id.getpicture).setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View view) { if(startstoppreview.isChecked() && ccv2WithPreview != null) { ccv2WithPreview.takePicture(); } else if(ccv2WithoutPreview != null){ ccv2WithoutPreview.openCamera(); try { Thread.sleep(20); } catch (InterruptedException e) {} ccv2WithoutPreview.takePicture(); } Toast.makeText(getApplicationContext(), "Picture Clicked", Toast.LENGTH_SHORT).show(); } }); getPermissions(); } @Override protected void onDestroy() { super.onDestroy(); // if(ccv2WithPreview != null) { // ccv2WithPreview.closeCamera(); // } // if(ccv2WithoutPreview != null) { // ccv2WithoutPreview.closeCamera(); // } } private void getPermissions(){ if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { if(checkSelfPermission(Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED || checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED){ //Requesting permission. ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1); } } } @Override //Override from ActivityCompat.OnRequestPermissionsResultCallback Interface public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) { switch (requestCode) { case 1: { // If request is cancelled, the result arrays are empty. if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { // permission granted } return; } } } } 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115 package com.zatackcoder.camera2test; import android.Manifest;import android.content.Intent;import android.content.pm.PackageManager;import android.os.Build;import android.os.Bundle;import android.support.annotation.RequiresApi;import android.support.v4.app.ActivityCompat;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.Toolbar;import android.view.View;import android.widget.Switch;import android.widget.Toast; @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)public class MainActivity extends AppCompatActivity implements ActivityCompat.OnRequestPermissionsResultCallback { CameraControllerV2WithPreview ccv2WithPreview; CameraControllerV2WithoutPreview ccv2WithoutPreview; AutoFitTextureView textureView; Switch startstoppreview; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); final Intent intent = getIntent(); boolean showpreview = intent.getBooleanExtra("showpreview", false); textureView = (AutoFitTextureView)findViewById(R.id.textureview); startstoppreview = (Switch) findViewById(R.id.startstoppreview); if(showpreview) { ccv2WithPreview = new CameraControllerV2WithPreview(MainActivity.this, textureView); startstoppreview.setChecked(true); } else { ccv2WithoutPreview = new CameraControllerV2WithoutPreview(getApplicationContext()); startstoppreview.setChecked(false); } startstoppreview.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View view) { if(startstoppreview.isChecked()) { intent.putExtra("showpreview", true); finish(); startActivity(intent); } else { intent.putExtra("showpreview", false); finish(); startActivity(intent); } } }); findViewById(R.id.getpicture).setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View view) { if(startstoppreview.isChecked() && ccv2WithPreview != null) { ccv2WithPreview.takePicture(); } else if(ccv2WithoutPreview != null){ ccv2WithoutPreview.openCamera(); try { Thread.sleep(20); } catch (InterruptedException e) {} ccv2WithoutPreview.takePicture(); } Toast.makeText(getApplicationContext(), "Picture Clicked", Toast.LENGTH_SHORT).show(); } }); getPermissions(); } @Override protected void onDestroy() { super.onDestroy();// if(ccv2WithPreview != null) {// ccv2WithPreview.closeCamera();// }// if(ccv2WithoutPreview != null) {// ccv2WithoutPreview.closeCamera();// } } private void getPermissions(){ if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { if(checkSelfPermission(Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED || checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED){ //Requesting permission. ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1); } } } @Override //Override from ActivityCompat.OnRequestPermissionsResultCallback Interface public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) { switch (requestCode) { case 1: { // If request is cancelled, the result arrays are empty. if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { // permission granted } return; } } }} activity_main.xml activity_main.xml XHTML <?xml version="1.0" encoding="utf-8"?> <android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.zatackcoder.camera2test.MainActivity"> <android.support.design.widget.AppBarLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:theme="@style/AppTheme.AppBarOverlay"> <android.support.v7.widget.Toolbar android:id="@+id/toolbar" android:layout_width="match_parent" android:layout_height="?attr/actionBarSize" android:background="?attr/colorPrimary" app:popupTheme="@style/AppTheme.PopupOverlay" /> </android.support.design.widget.AppBarLayout> <include layout="@layout/content_main" /> </android.support.design.widget.CoordinatorLayout> 12345678910111213141516171819202122232425 <?xml version="1.0" encoding="utf-8"?><android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.zatackcoder.camera2test.MainActivity"> <android.support.design.widget.AppBarLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:theme="@style/AppTheme.AppBarOverlay"> <android.support.v7.widget.Toolbar android:id="@+id/toolbar" android:layout_width="match_parent" android:layout_height="?attr/actionBarSize" android:background="?attr/colorPrimary" app:popupTheme="@style/AppTheme.PopupOverlay" /> </android.support.design.widget.AppBarLayout> <include layout="@layout/content_main" /> </android.support.design.widget.CoordinatorLayout> content_main.xml content_main.xml XHTML <?xml version="1.0" encoding="utf-8"?> <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" app:layout_behavior="@string/appbar_scrolling_view_behavior" tools:context="com.zatackcoder.camera2test.MainActivity" tools:showIn="@layout/activity_main"> <RelativeLayout android:layout_width="0dp" android:layout_height="0dp" android:orientation="vertical" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" android:layout_margin="5dp"> <com.zatackcoder.camera2test.AutoFitTextureView android:id="@+id/textureview" android:layout_width="match_parent" android:layout_height="wrap_content" /> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:orientation="vertical"> <Switch android:id="@+id/startstoppreview" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Start Preview" /> <Button android:id="@+id/getpicture" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="getPicture" /> </LinearLayout> </RelativeLayout> </android.support.constraint.ConstraintLayout> 123456789101112131415161718192021222324252627282930313233343536373839404142434445 <?xml version="1.0" encoding="utf-8"?><android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" app:layout_behavior="@string/appbar_scrolling_view_behavior" tools:context="com.zatackcoder.camera2test.MainActivity" tools:showIn="@layout/activity_main"> <RelativeLayout android:layout_width="0dp" android:layout_height="0dp" android:orientation="vertical" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" android:layout_margin="5dp"> <com.zatackcoder.camera2test.AutoFitTextureView android:id="@+id/textureview" android:layout_width="match_parent" android:layout_height="wrap_content" /> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:orientation="vertical"> <Switch android:id="@+id/startstoppreview" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Start Preview" /> <Button android:id="@+id/getpicture" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="getPicture" /> </LinearLayout> </RelativeLayout></android.support.constraint.ConstraintLayout> Output Android Studio Project Download Android Camera 2 Api Example 1 file(s) 23.96 MB Download Thanks Please share if you like and if you have any question you can ask in comment
