Calling an application with a lock screen

• To start the app when the screen is locked, you need to register a BroadcastReceiver for the Intent.ACTION_SCREEN_OFF for details see example http://thinkandroid.wordpress.com/2010/01/24/handling-screen-off-and-screen-on-intents /

• To launch the application at boot time you need a broadcast receiver that listens for the BOOT_COMPLETED action, please refer to How to start the application on startup?

First you need permission in your manifest:

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

      

        
        
        
      

    

Also, in your manifest, define your service and listen for the loading completed action:

<service android:name=".MyService" android:label="My Service">
    <intent-filter>
        <action android:name="com.myapp.MyService" />
    </intent-filter>
</service>

<receiver
    android:name=".receiver.StartMyServiceAtBootReceiver"
    android:enabled="true"
    android:exported="true"
    android:label="StartMyServiceAtBootReceiver">
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED" />
    </intent-filter>
</receiver>

      

        
        
        
      

    

Next, you need to define a recipient who will receive the BOOT_COMPLETED action and start your service.

public class StartMyServiceAtBootReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        if ("android.intent.action.BOOT_COMPLETED".equals(intent.getAction())) {
            Intent serviceIntent = new Intent("com.myapp.MySystemService");
            context.startService(serviceIntent);
        }
    }
}

      

        
        
        
      

    

And now your service should start when your phone starts.