Android AlarmManager to Start Background Service Periodically

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Hello Friends, Today I am going to share how to use Android AlarmManager to Start Background Service Periodically. The Alarm Manager holds a CPU wake lock which guarantees that the phone will not sleep until you have finished handling the broadcast. It can also be used to perform some repetitive task outside the lifetime of your application, which means even if your app is not running, you can initiate long-running operation. such as downloading weather forecast once a day or once every fifteen minutes.

So, here is the code

MainActivity.java

package com.zatackcoder.alarmmanagertest;

import androidx.appcompat.app.AppCompatActivity;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    Button btn;

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

        btn = findViewById(R.id.btn);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                setAlarm();
            }
        });
    }

    private void setAlarm() {
        Intent intent = new Intent(this, MyService.class);
        PendingIntent pendingIntent = PendingIntent.getService(getApplicationContext(), 1, intent, 0);
        AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
        alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), AlarmManager.INTERVAL_FIFTEEN_MINUTES, pendingIntent);
        Toast.makeText(this, "Alarm will ring after every 15 minutes interval",Toast.LENGTH_LONG).show();
    }
}

package com.zatackcoder.alarmmanagertest;

import androidx.appcompat.app.AppCompatActivity;

import android.app.AlarmManager;

import android.app.PendingIntent;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

Button btn;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

btn = findViewById(R.id.btn);

btn.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

setAlarm();

}

});

}

private void setAlarm() {

Intent intent = new Intent(this, MyService.class);

PendingIntent pendingIntent = PendingIntent.getService(getApplicationContext(), 1, intent, 0);

AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);

alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), AlarmManager.INTERVAL_FIFTEEN_MINUTES, pendingIntent);

Toast.makeText(this, "Alarm will ring after every 15 minutes interval",Toast.LENGTH_LONG).show();

}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    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"
    android:orientation="vertical"
    android:gravity="center"
    android:padding="30dp">

    <Button
        android:id="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Set Repeating Alarm"/>

</LinearLayout>

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

<LinearLayout

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"

android:orientation="vertical"

android:gravity="center"

android:padding="30dp">

<Button

android:id="@+id/btn"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Set Repeating Alarm"/>

</LinearLayout>

MyService.java

package com.zatackcoder.alarmmanagertest;

import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.IBinder;
import android.provider.Settings;
import android.widget.Toast;

public class MyService extends Service {

    MediaPlayer mp;

    @Override
    public void onCreate() {
        super.onCreate();
        mp = MediaPlayer.create(getApplicationContext(), Settings.System.DEFAULT_ALARM_ALERT_URI);
        mp.start();
        Toast.makeText(getApplicationContext(), "Hi, I am service see you again after 15 minutes", Toast.LENGTH_LONG).show();
    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO: Return the communication channel to the service.
        throw new UnsupportedOperationException("Not yet implemented");
    }
}

package com.zatackcoder.alarmmanagertest;

import android.app.Service;

import android.content.Intent;

import android.media.MediaPlayer;

import android.os.IBinder;

import android.provider.Settings;

import android.widget.Toast;

public class MyService extends Service {

MediaPlayer mp;

@Override

public void onCreate() {

super.onCreate();

mp = MediaPlayer.create(getApplicationContext(), Settings.System.DEFAULT_ALARM_ALERT_URI);

mp.start();

Toast.makeText(getApplicationContext(), "Hi, I am service see you again after 15 minutes", Toast.LENGTH_LONG).show();

}

@Override

public IBinder onBind(Intent intent) {

// TODO: Return the communication channel to the service.

throw new UnsupportedOperationException("Not yet implemented");

}

AndroidManifest.xml

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

    <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">
        <service
            android:name=".MyService"
            android:enabled="true"
            android:exported="true"></service>

        <activity android:name=".MainActivity">
            <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.alarmmanagertest">

<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">

<service

android:name=".MyService"

android:enabled="true"

android:exported="true"></service>

<intent-filter>

</intent-filter>

</activity>

</application>

</manifest>

Screenshot

alarm-manager-test-2 alarm-manager-test-1

AndroidStudio Project Download

Using Android AlarmManager to Start Background Service Periodically

1 file(s) 8.92 MB

Download

Reference

https://developer.android.com/training/scheduling/alarms

Thanks for Stoping by
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Android AlarmManager to Start Background Service Periodically

MainActivity.java

activity_main.xml

MyService.java

AndroidManifest.xml

Screenshot

AndroidStudio Project Download

Using Android AlarmManager to Start Background Service Periodically

Reference

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