问题描述
我的警报项目快要完成了，我有代码可以每秒比较当前时间和目标时间，以查看是否为true，并在警报到期时播放铃声。我的问题是我似乎无法在指定的时间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();
}
});
}
}
铃声可以永远播放，谢谢。我需要一些代码才能签入并管理播放时间。现在可以使用了...
解决方法
您可以使用TimerTask和Timer安排指定的时间来做某事。
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));
}
}
}
然后在 Activity.cs 中，我们可以在方法中调用Ringtone.Play()，例如单击按钮的方法：
private void Button_Click(object sender,EventArgs e)
{
Timer timer = new Timer();
timer.Schedule(new MyTask(timer,r,this),1000);
r.Play();
}