WebView Based Android App

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Hello Friends, Today I am going to share how to create WebView based Android App. WebView based app is nothing but a App in which we call website url in WebView. You can create WebView based app in just few minutes but the condition is website should be responsive to make it look like an App. So, here is the code.

MainActivity.java

package com.zatackcoder.webviewapp;

import android.app.ProgressDialog;
import android.content.Context;
import android.graphics.Bitmap;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    WebView webView;
    ProgressDialog progressDialog;
    String url = "https://zatackcoder.com";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initControls();
    }

    private void initControls() {
        webView = findViewById(R.id.webview);
        progressDialog = ProgressDialog.show(MainActivity.this, "", "Please Wait ...", true);

        webView.setWebViewClient(new WebViewClient() {

            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                //To open hyperlink in existing WebView
                view.loadUrl(url);
                return false;
            }

            @Override
            public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
                Toast.makeText(getApplicationContext(), description, Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onPageStarted(WebView view, String url, Bitmap favicon) {
                if (progressDialog != null) {
                    progressDialog.show();
                }
            }

            @Override
            public void onPageFinished(WebView view, String url) {
                if (progressDialog != null) {
                    progressDialog.dismiss();
                }
            }
        });

        webView.getSettings().setJavaScriptEnabled(true);
        webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
        webView.getSettings().setBuiltInZoomControls(false);

        if (!isNetworkConnected()) {
            webView.loadData("<html><body style='text-align:center;'><h1>Connection Error ...</h1><h2>Check Your Connection ... </h2></body></html>", "text/html", null);
        } else {
            webView.loadData("<html><body style='text-align:center;'><h1>Loading ...</h1></body></html>", "text/html", null);
            webView.loadUrl(url);
        }
    }

    private boolean isNetworkConnected() {
        ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo ni = cm.getActiveNetworkInfo();
        return ni == null ? false : true;
    }

    @Override
    public void onBackPressed() {
        if (webView.canGoBack()) {
            webView.goBack();
        }
        super.onBackPressed();
    }
}

package com.zatackcoder.webviewapp;

import android.app.ProgressDialog;

import android.content.Context;

import android.graphics.Bitmap;

import android.net.ConnectivityManager;

import android.net.NetworkInfo;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.webkit.WebChromeClient;

import android.webkit.WebView;

import android.webkit.WebViewClient;

import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

WebView webView;

ProgressDialog progressDialog;

String url = "https://zatackcoder.com";

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

initControls();

}

private void initControls() {

webView = findViewById(R.id.webview);

progressDialog = ProgressDialog.show(MainActivity.this, "", "Please Wait ...", true);

webView.setWebViewClient(new WebViewClient() {

@Override

public boolean shouldOverrideUrlLoading(WebView view, String url) {

//To open hyperlink in existing WebView

view.loadUrl(url);

return false;

}

@Override

public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {

Toast.makeText(getApplicationContext(), description, Toast.LENGTH_SHORT).show();

}

@Override

public void onPageStarted(WebView view, String url, Bitmap favicon) {

if (progressDialog != null) {

progressDialog.show();

}

@Override

public void onPageFinished(WebView view, String url) {

if (progressDialog != null) {

progressDialog.dismiss();

}

});

webView.getSettings().setJavaScriptEnabled(true);

webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);

webView.getSettings().setBuiltInZoomControls(false);

if (!isNetworkConnected()) {

webView.loadData("<html><body style='text-align:center;'><h1>Connection Error ...</h1><h2>Check Your Connection ... </h2></body></html>", "text/html", null);

} else {

webView.loadData("<html><body style='text-align:center;'><h1>Loading ...</h1></body></html>", "text/html", null);

webView.loadUrl(url);

}

private boolean isNetworkConnected() {

ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);

NetworkInfo ni = cm.getActiveNetworkInfo();

return ni == null ? false : true;

}

@Override

public void onBackPressed() {

if (webView.canGoBack()) {

webView.goBack();

}

super.onBackPressed();

}

activity_main.xml

<?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"
    tools:context=".MainActivity">

    <WebView
        android:id="@+id/webview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:layout_editor_absoluteX="8dp"
        tools:layout_editor_absoluteY="8dp" />

</android.support.constraint.ConstraintLayout>

<?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"

tools:context=".MainActivity">

<WebView

android:id="@+id/webview"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:layout_editor_absoluteX="8dp"

tools:layout_editor_absoluteY="8dp" />

</android.support.constraint.ConstraintLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.zatackcoder.webviewapp">

    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity
            android:name=".MainActivity"
            android:configChanges="orientation|screenSize"><!-- To Stop Reload of WebView on Screen Rotation -->
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.zatackcoder.webviewapp">

<uses-permission android:name="android.permission.INTERNET"/>

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

<application

android:allowBackup="true"

android:icon="@mipmap/ic_launcher"

android:label="@string/app_name"

android:roundIcon="@mipmap/ic_launcher_round"

android:supportsRtl="true"

android:theme="@style/AppTheme">

<activity

android:name=".MainActivity"

android:configChanges="orientation|screenSize">

<intent-filter>

</intent-filter>

</activity>

</application>

</manifest>

Screenshots

AndroidStudio Project Download