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.

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