在 Xamarin 中播放一分钟铃声 Android

Question

我的闹钟项目几乎完成，我有代码每秒比较当前时间和目标时间，看看是否为真，并在闹钟成熟时播放铃声。我的问题是我似乎无法在指定的时间段内播放铃声然后停止这是我的源文件...

 class SecondActivity : AppCompatActivity{
//System Timer defintion with interval of one second in class
 System.Timers.Timer _stopringtone = new System.Timers.Timer(1000);

               protected override void OnCreate(Bundle savedInstanceState){
  //Defining path for Ringtone's default uri
   path = RingtoneManager.GetDefaultUri(RingtoneType.Ringtone);
  //Ringtone instance
   r = RingtoneManager.GetRingtone(Application.Context, path);
//Timer elpase event handler 
  _stopringtone.Elapsed += _stopringtone_Elapsed;
//Timer disabled by default will be enabled by alarm maturity event
 _stopringtone.Enabled = false;
   
}
//This event checks every second if the two time variables are equal and plays a ringtone alongside a vibration pattern 
 private void OnTimedEvent(object sender, System.Timers.ElapsedEventArgs e)
        {
            RunOnUiThread(() =>
           {
             //Code to check current time and target time defined here
             
               
             //Logic to compare the two variables
            if (span == span1){
            //Event Elapse method returns true so alarm time has matured, play some music and vibration
            
             //Vibration definition
                 Vibrator vibrator = (Vibrator)GetSystemService(Context.VibratorService);
              //Vibration pattern definition
              long[] pattern = { 0, 2000, 2000 };
              //Play vibration
              vibrator.Vibrate(pattern,0);
              //Play Ringtone Uri,This is where I need code to play the ringtone for interval 60 seconds
               r.Play();
          //Alarm matured so enable timer to count down 20 seconds and shut off music
            _stopringtone.Enabled = true;

                 }
           }
//CountDown Logic method
  private void _stopringtone_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
            RunOnUiThread(() =>
            {
                int a = 0;
                int b = a++;
                if (b == 10)
                {
                    r.Stop();
                }
            });
        }
}

铃声一直播放，我需要一些代码来登记和管理播放时间，谢谢。现在可以使用了...

Answer 1

您可以使用 TimerTask 和 Timer 来安排指定的时间段做某事。

例如，每秒创建一个 TimerTask 来计数并停止计时器任务，直到 60 秒。

class MyTask : TimerTask
{
    Timer mTimer;
    Ringtone ringtone;
    MainActivity mainActivity;

    public MyTask(Timer timer, Ringtone r, MainActivity mainActivity)
    {
        this.mTimer = timer;
        this.ringtone = r;
        this.mainActivity = mainActivity;
    }
    int i;
    public override void Run()
    {
        if (i < 60)
        {
            i++;
        }
        else
        {
            mTimer.Cancel();
            ringtone.Stop();
            mainActivity.StartActivity(typeof(NextActivity));
        }

           
    }
}

那么在Activity.cs中，我们可以在方法中调用Ringtone.Play()，比如按钮点击的方法：

private void Button_Click(object sender, EventArgs e)
{
    Timer timer = new Timer();
    timer.Schedule(new MyTask(timer,r,this), 0, 1000);
    r.Play();
}

在 Xamarin 中播放一分钟铃声 Android

Play Ringtone for One minute in Xamarin Android

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