创建弹出窗口，而不是来自BroadcastReceiver的通知

Question

i need to display pop up message in the center of screen , after reading in few forums i found out that it can be achieved by starting a new transparent activity .

this is my code :

@Override
public void onReceive(Context context, Intent intent) {

    Intent i = new Intent();
    i.setClassName(context,
            "com.ui.activity.NotificationActivity");
    i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    context.startActivity(i);

}

this work's but :

if application is in background than the application will come to the foreground with the pop up on it (if the application is not on background this work's great ).

Answer 1

If you don't want your app to be brought to the foreground when this popup is shown, you need to ensure that NotificationActivity has a different task affinity than the rest of your application.

In the manifest, add this to the <activity> definition for NotificationActivity :

android:taskAffinity=""

Without this, the default task affinity for all Activities is the same, so that when Android looks for a task to launch NotificationActivity into, and your app is already running, Android launches NotificationActivity into that task and brings it to the foreground.

If you change the task affinity, Android won't look for an existing task to launch NotificationActivity into, and will just create a new task.