即使我按下停止按钮，闹钟也会响起

Question

我做了一个闹钟，它几乎可以正常工作，只是它永远不会停止。 即使我按下停止警报按钮，它也会一直响。

我有两个按钮，一个 ID 为 setthealarm，另一个 ID 为 stopthealarm。

在公共类MainActivity我定义TimePicker、PendingIntent和AlarmManager

public class activity_mainnew extends Activity {
TimePicker alarmTimePicker;
    PendingIntent pendingIntent;
    AlarmManager alarmManager;



@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_mainnew);
alarmTimePicker = (TimePicker) findViewById(R.id.timePicker);
alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
}

设置时间onClick:

@RequiresApi(api = Build.VERSION_CODES.M)
    public void setthealarm(View view){
        Toast.makeText(activity_mainnew.this, "ALARM ON", Toast.LENGTH_SHORT).show();
        long time;

        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.HOUR_OF_DAY, alarmTimePicker.getHour());
        calendar.set(Calendar.MINUTE, alarmTimePicker.getMinute());

        Intent intent = new Intent(this, AlarmReceiver.class);
        pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);

        alarmTimePicker.setDescendantFocusability(TimePicker.FOCUS_BLOCK_DESCENDANTS);

        time = (calendar.getTimeInMillis()-(calendar.getTimeInMillis()%60000));
        if(System.currentTimeMillis()>time)
        {
            if (calendar.AM_PM == 0)
                time = time + (1000*60*60*12);
            else
                time = time + (1000*60*60*24);
        }
        alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, time, 10000, pendingIntent);
    }

然后停止警报onClick:

@RequiresApi(api = Build.VERSION_CODES.M)
public void stopthealarm(View view){
    Toast.makeText(activity_mainnew.this, "ALARM OFF", Toast.LENGTH_SHORT).show();
    Intent intent = new Intent(this, AlarmReceiver.class);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
    AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
    alarmManager.cancel(pendingIntent);
    pendingIntent.cancel();
}

在我的 AlarmReceiver 类中，我有以下内容：

public class AlarmReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        Uri alarmUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM);

        if (alarmUri == null) {
        alarmUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        }

        Ringtone ringtone = RingtoneManager.getRingtone(context, alarmUri);
        ringtone.play();
    }
}

知道为什么铃声不会停止吗？

Answer 1

要正确取消警报，您需要让 PendingIntent 使用 FLAG_UPDATE_CURRENT 标志。

PendingIntent pendingIntent = PendingIntent.getBroadcast(this, AlarmReceiver.REQUEST_CODE, intent, PendingIntent.FLAG_UPDATE_CURRENT);

还在您的 AlarmReceiver 类的开头，onReceive() 之前添加一个请求代码行：

public static final int REQUEST_CODE = 222;

在点击停止按钮时停止铃声上的来电stop()：

Ringtone ringtone = RingtoneManager.getRingtone(context, alarmUri);
ringtone.stop();

Answer 2

这可能是因为您没有在这个问题中粘贴代码，但我实际上没有看到将 stopthealarm 连接到按钮 onclick 的代码。您确定 stopthealarm 功能会触发吗？

你这样做是为了setthealarm，而不是为了stopthealarm

setthetime onclick:

亲切的问候