java - Android - 如何重新显示主要 Activity

Question

我一直在寻找解决此问题的方法，但一直找不到。

我遇到的问题是警报听起来正常，但是 MainActivity 已关闭并且未重新显示。

如何在以下代码中重新显示 MainActivity:

public class AlarmReceiver extends WakefulBroadcastReceiver {

@Override
public void onReceive(final Context context, Intent intent) {
    //this will update the UI with message
    AlarmActivity inst = AlarmActivity.instance();
    inst.setAlarmText("Alarm! Wake up! Wake up!");

    //this will sound the alarm tone
    //this will sound the alarm once, if you wish to
    //raise alarm in loop continuously then use MediaPlayer and setLooping(true)
    Uri alarmUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM);
    if (alarmUri == null) {
        alarmUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
    }
    Ringtone ringtone = RingtoneManager.getRingtone(context, alarmUri);
    ringtone.play();

    //this will send a notification message
    ComponentName comp = new ComponentName(context.getPackageName(),
            AlarmService.class.getName());
    startWakefulService(context, (intent.setComponent(comp)));
    setResultCode(Activity.RESULT_OK);
}

}

该代码是我从 JavaPapers 下载的示例代码

http://javapapers.com/android/android-alarm-clock-tutorial/

Answer 1

我的建议 发送广播并让接收者/或服务为您启动 Activity