startActivity() from BroadcastReceiver

Question

I am trying to autostart my nightclock application on charging using the following BroadcastReceiver implemented in the onPause() method:

BroadcastReceiver test = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        unregisterReceiver(this);
        Intent i = new Intent(context, NightClock.class);
        i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        context.startActivity(i);   
    }           
};
registerReceiver(test, new IntentFilter(Intent.ACTION_POWER_CONNECTED));

The onReceive() method is fired when the USB-cable is plugged in, but the activity doesn't start. However the log shows this:

I/ActivityManager(   79): Starting activity: Intent { flg=0x10000000 cmp=com.meins.nightclock/.NightClock }

Any ideas why the log says the activity is started, but nothing happens?

Answer 1

You have context passed as parameter to onRecieve() method, so just use:

 @Override
public void onReceive(Context context, Intent intent) {
    //start activity
    Intent i = new Intent();
    i.setClassName("com.test", "com.test.MainActivity");
    i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    context.startActivity(i);
}

It works, of course you have to change package and activity class name to your own.