Close Activity Using BroadcastReceiver

问题

i have one activity Main.java is open in my application, i want to close the activity using broadcast receiver , how to close the activity?

回答1:

Firstly your Main.java needs to be registered as a receiver. You could register it in Main.java's onResume():

@Override
public void onResume() {
    registerReceiver(broadcastReceiver, new IntentFilter(BroadcasterClassName.NAME_OF_ACTION));
}

Then handle the broadcast and finish your activity:

private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(BroadcasterClassName.NAME_OF_ACTION)) {
            finish();
        }
    }
}

回答2:

You could send a message to the activity which implements Handler.Callback, and handle it there to close the activity.

Quick example:

class Act1 extends Activity implements Handler.Callback {
 public static final int CLOSE_ACTIVITY = 54212;
 public boolean handleMessage(Message msg) {
   if(msg.what == CLOSE_ACTIVITY) {
    finish();
   }
 }
}

And then, since you BroadcastReceiver runs on main thread, in most of the cases. Just send the message via Handler.

new Handler().sendMessage(MessageFactory.createShutdownMsg()).

回答3:

you could do this: in your main have:

private static Main mInstance;

onCreate()
{
   ...
   mInstance = this;
}

public static boolean closeActivity()
{
   if (mInstance != null)
   {
      mInstance.finish();
      return true;
   }
   return false;
}

although, this implies only one Main exists at any one time. I think you can achieve that by adding android:noHistory="true" or something similar in the manifest.

来源：https://stackoverflow.com/questions/13971348/close-activity-using-broadcastreceiver

标签

android

broadcastreceiver