Activity is never called

Question

I am working on an android application where an action is triggered after specific interval of time again and again when there is an Intent.FLAG_ACTIVITY_NEW_TASK Broadcast message received. I have the following code in UpdateService.java:

package com.missnoob.screentimeout;

import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;

public class UpdateService extends Service {

    @Override
    public void onCreate() {
        super.onCreate();
        // REGISTER RECEIVER THAT HANDLES SCREEN ON AND SCREEN OFF LOGIC
        IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
        filter.addAction(Intent.ACTION_SCREEN_OFF);
        BroadcastReceiver mReceiver = new ScreenReceiver();
        registerReceiver(mReceiver, filter);
    }

    @Override
    public void onStart(Intent intent, int startId) {
        boolean screenOn = intent.getBooleanExtra("screen_state", false);
        if (!screenOn) {
            Log.v("ScreenTimeOut","Broadcast Received");
            Toast.makeText(getApplicationContext(), "Broadcast Received", Toast.LENGTH_LONG).show();

            //This part is not working
            Intent i = new Intent(this, Notification.class);
            i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            //This part is not working

        } 
        else 
        {
            // YOUR CODE
        }
    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        return null;
    }
}

And the following code in Notification.java:

package com.missnoob.screentimeout;

import java.util.Timer;
import java.util.TimerTask;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;
import com.shadow.screentimeout.R;

public class Notification extends Activity {
/** Called when the activity is first created. */

Timer timer;
Toast toast;

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

    timer = new Timer();
    toast = Toast.makeText(getApplicationContext(), "15 seconds after",Toast.LENGTH_SHORT);

    timer.scheduleAtFixedRate(new TimerTask() 
        {
            @Override
            public void run() {
                toast.show();
                Log.v("ScreenTimeOut","Toast showed");

            }
        }, 0, 5000);

    }

}

In UpdateService.java

Intent i = new Intent(this, Notification.class);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

never gets triggered.

this could of been figured out with a simple google search: `how do i go to a new activity in android` — string.Empty, Apr 29 '14 at 07:55

score 1 · Accepted Answer · edited May 23 '17 at 11:57

1

You are missing startActivity(i)

 Intent i = new Intent(this, Notification.class);
 i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 startActivity(i);

Also you cannot have

 toast.show();

in timer as it runs on a different thread and you can update ui only on the ui thread.

Instead use a Handler. You can find an example @

Android Thread for a timer

edited May 23 '17 at 11:57

Community

1
1

answered Apr 29 '14 at 07:52

Raghunandan

132,755
26
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score 1 · Answer 2 · edited Apr 29 '14 at 07:53

1

You have not called startActivity(i).

See Start Another Activity (android developer website).

edited Apr 29 '14 at 07:53

shkschneider

17,833
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answered Apr 29 '14 at 07:52

Waqar Ahmed

5,005
2
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45

score 1 · Answer 3 · answered Apr 29 '14 at 07:56

1

You are didn't call startActivity(i), thats why your activity is never caled, all you have to do is like this :

 Intent i = new Intent(this, Notification.class);
 i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 startActivity(i);

answered Apr 29 '14 at 07:56

Menma

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Activity is never called

3 Answers3