How to Start an service at boot time in android app?

This example demonstrates how do I in android.

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/activity_main.xml.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="https://schemas.android.com/apk/res/android"
   xmlns:tools="https://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:padding="4dp"
   tools:context=".MainActivity">
   <TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Hello World"
      android:textSize="24sp"
      android:layout_centerInParent="true"
      android:textStyle="bold"/>
</RelativeLayout>

Step 3 – Create a new Java class (StartAppOnBoot.java) and add the following code −

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
public class StartAppOnBoot 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);
      }
   }
}

Step 4 – Create a new Service (RunServiceOnBoot.java) and add the following code −

import android.content.Intent;
import android.os.Handler;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;
public class RunServiceOnBoot extends android.app.Service {
   private static String TAG = "MyService";
   private Handler handler;
   private Runnable runnable;
   private final int runTime = 5000;
   @Override
   public void onCreate() {
      super.onCreate();
      Toast.makeText(this, "Service Started", Toast.LENGTH_SHORT).show();
      Log.i(TAG, "onCreate");
      handler = new Handler();
      runnable = new Runnable() {
         @Override
         public void run() {
            handler.postDelayed(runnable, runTime);
         }
      };
      handler.post(runnable);
   }
   @Override
   public IBinder onBind(Intent intent) {
      return null;
   }
   @Override
   public void onDestroy() {
      if (handler != null) {
         handler.removeCallbacks(runnable);
      }
      super.onDestroy();
   }
   @Override
   public int onStartCommand(Intent intent, int flags, int startId) {
      return START_STICKY;
   }
   @SuppressWarnings("deprecation")
   @Override
   public void onStart(Intent intent, int startId) {
      super.onStart(intent, startId);
      Log.i(TAG, "onStart");
   }
}

Step 5 − Add the following code to src/MainActivity.java

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {
   @Override
   public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      Intent intent1 = new Intent(MainActivity.this, RunServiceOnBoot.class);
      startService(intent1);
   }
}

Step 6 – Add the following code to androidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="https://schemas.android.com/apk/res/android" package="app.com.sample">
   <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=".StartAppOnBoot" >
         <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED" />
            <action android:name="android.intent.action.QUICKBOOT_POWERON" />
         </intent-filter>
      </receiver>
   <service android:name=".RunServiceOnBoot" />
</application>
</manifest>

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen –