Kód MainActivity.java :

package eu.projectik.helloworld;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;


public class MainActivity extends Activity {

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


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

Následne do projektu pridáme ďalšie triedy, ktoré su potrebné na to, aby sa aplikácia spustila hneď po štarte telefónu. Tie  si nazveme AutoStart.java  a StartServiceOnBoot.java.

Kód StartServiceOnBoot.java :

package eu.projectik.helloworld;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;

public class StartServiceOnBoot extends Service {	 
    
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
    public void onDestroy() {
    	
    }

    @Override
    public void onStart(Intent intent, int startid)
    {
        Intent intents = new Intent(getBaseContext(),MainActivity.class);
        intents.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        startActivity(intents);
    }   
}

Kód AutoStart.java :

package eu.projectik.helloworld;

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

public class AutoStart extends BroadcastReceiver 
{
    public void onReceive(Context arg0, Intent arg1) 
    {
        Intent intent = new Intent(arg0,StartServiceOnBoot.class);
        arg0.startService(intent);       
    }
}

Následne je potrebné pridať do AndroidManifest.xml riadok :

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

A výsledný AndroidManifest.xml bude vyzerať takto:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="eu.projectik.helloworld"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="14"
        android:targetSdkVersion="21" />
	<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        
    <receiver
       android:name=".AutoStart"
       android:enabled="true"
       android:exported="false" >
       <intent-filter>
          <action android:name="android.intent.action.BOOT_COMPLETED" />
       </intent-filter>
    </receiver>  
    <service android:name=".StartServiceOnBoot" ></service>
    
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>