Android 在广播接收器中弹出对话框

 1 public class ForceOfflineReceiver extends BroadcastReceiver{
 2     @Override
 3     public void onReceive(final Context context, Intent intent) {
 4 
 5         AlertDialog.Builder dialogBuilder =  new AlertDialog.Builder(context);
 6         dialogBuilder.setTitle("下线通知");
 7         dialogBuilder.setMessage("你的账户在其他地方登录 Over");
 8         dialogBuilder.setCancelable(false);
 9         dialogBuilder.setPositiveButton("重新登录",
10                 new DialogInterface.OnClickListener() {
11                     @Override
12                     public void onClick(DialogInterface dialog, int which) {
13                         ActivityCollector.finishAll();//摧毁所有活动
14                         Intent intent1 = new Intent(context, LoginActivity.class);
15                         //在广播接受者中启动活动需要添加FLAG_ACTIVITY_NEW_TASK标志
16                         intent1.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
17                         context.startActivity(intent1);
18                     }
19                 });
20         AlertDialog alertDialog = dialogBuilder.create();
21         alertDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
22         alertDialog.show();
23     }
24 }