onReceive never called

Question

I have the following code I want to detect the screen off of the phone But the function onReceive never is never called can anyone give me a solution. Please help. if anyone has anyother working code please help. Thank you

package com.pack;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;

public class Screen extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        IntentFilter filter = new IntentFilter();
        filter.addAction(Intent.ACTION_SCREEN_OFF);
     Context con = this;
        this.registerReceiver(new BroadcastReceiver() {

              @Override
              public void onReceive(Context context, Intent intent) {
               System.out.println("Screen off...................");
              }
            }, new IntentFilter(Intent.ACTION_SCREEN_OFF));
    }

}

Answer 1

Your code works for me. I modified the code so it's easier to read and added some sysouts, but it works the way you wrote it:

public class Test extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_OFF);
    registerReceiver(new BroadcastReceiver() {

        @Override
        public void onReceive(Context context, Intent intent) {
            System.out.println("Screen off...................");
        }

    }, filter);
}

@Override
protected void onResume() {
    super.onResume();
    System.out.println("onResume()");
}

@Override
protected void onDestroy() {
    super.onDestroy();
    System.out.println("onDestroy()");
}

@Override
protected void onPause() {
    super.onPause();
    System.out.println("onPause()");
}

It prints the following if I do (start activity, turn screen off, turn screen on, press back button):

onResume()
onPause()
Screen off...................
onResume()
onPause()
onDestroy()

After this the activity is destroyed and therefore no events are displayed. Maybe you want to register your BroadcastReceiver in the AndroidManifest instead.