startActivity() from outside of an Activity context requires the FLAG_ACTIVITY_NEW flag

startActivity() from outside of an Activity context requires the FLAG_ACTIVITY_NEW flag,is this really what you want?

在制作闹钟，复写BroadcastReceiver的onrecieve时，用Intent intent 连接AlartDialog时出现了以上问题

@Override
public void onReceive(Context arg0, Intent arg1) {
  System.out.print("CallAlarm");
  Intent intent = new Intent(arg0,AlarmAlert.class);
   arg0.startActivity(intent);
}

添加intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);