Start App on Boot – Coding in Flow

[embedyt] https://www.youtube.com/watch?v=4_CkU9L2mCo[/embedyt]

In this video we will learn how to automatically start an activity when we boot up the device, by registering a BOOT_COMPLETED broadcast receiver and starting a new intent in it’s onReceive method.
On this intent we have to set the FLAG_ACTIVITY_NEW_TASK because we want to call startActivity from outside of an activity context.
To receive the boot broadcasts we have to add the RECEIVE_BOOT_COMPLETED permission into the manifest file.
On some devices, BOOT_COMPLETED will not be triggered when the device gets restarted, so we will also add the QUICKBOOT_POWERON intent filter.

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StartActivityOnBootReceiver.javaAndroidManifest.xml

package com.codinginflow.onbootreceiverexample;

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


public class StartActivityOnBootReceiver extends BroadcastReceiver {

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

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

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

    <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">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

        <receiver android:name=".StartActivityOnBootReceiver">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" />
                <action android:name="android.intent.action.QUICKBOOT_POWERON" />
            </intent-filter>
        </receiver>
    </application>

</manifest>