Service Crashes With Nullpointerexception At OnCreate

i wanted to check the actual time every 5 mins in a service and mute or unmute the phone depending on the time. earlier i tried to use a while(true) with thread.sleep(300000) at th

Solution 1:

Timer myTimer = new Timer();
MyTimerTask myTimerTask= new MyTimerTask();
AudioManager audioManager;

public void onCreate()
{
    super.onCreate();
    audioManager = (AudioManager)this.getSystemService(Context.AUDIO_SERVICE);
}

you need to initialize audioManager inside onCreate.

Solution 2:

Insted of this:

AudioManager audioManager = (AudioManager)this.getSystemService(Context.AUDIO_SERVICE);

Do this:

AudioManager audioManager = (AudioManager)getApplicationContext().getSystemService(Context.AUDIO_SERVICE);