How to Start an Application at Device Bootup in Android

This tutorial will explain how to start an application while the Android device bootup. For this, we need to listen to the BOOT_COMPLETED action and react to it. The BOOT_COMPLETED is a Broadcast Action that is broadcast once after the system has finished booting. You can listen to this action by creating a BroadcastReceiver that then starts your launch Activity when it receives an intent with the BOOT_COMPLETED action.

Here's a step-by-step guide:

Add permission to your manifest

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

Create a Custom BroadcastReceiver

Secondly, create a custom BroadcastReceiver in your project to receive boot up event.

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

public class BootReceiver extends BroadcastReceiver{

	@Override
	public void onReceive(Context context, Intent intent) {
		Intent i = new Intent(context, MainActivity.class);  
                i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                context.startActivity(i);  
	}
}

Adding BroadCastReceiver to the Android Manifest

<receiver android:name=".BootReceiver" android:enabled="true" 
    android:permission="android.permission.RECEIVE_BOOT_COMPLETED">
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</receiver>

Install the application, and then restart the device. You can see the application will start after the device restarts.