如何检查一番定期？ [英] How to check something at regular intervals?

问题描述

新手在这里，我有一个简单的问题。

Beginner here, I have a simple question.

在Android的什么是最好的东西来定期检查些什么呢？

In Android what would be the best what to check for something at regular intervals?

请多多包涵，我会尽力解释尽我所能 -

Please bear with me, I'll try to explain the best I can --

例如我的音乐应用程序是非常简单的，主要活动和服务。主要活动有两个按钮，启动和停止音频的UI。我preSS启动和音频服务启动。同样，当我点击停止服务停止，音频结束。如果 isLooping（）是硬coded到真正有没有问题，因为声音永远不会结束，除非我打了停止按钮，用于停止音频服务，并重置按钮状态。

For example my audio app is very simple, a main activity and a service. The main activity has a UI with two buttons, start and stop audio. I press start and the audio service starts. Likewise when I click Stop the service stops and the audio ends. If isLooping() is hard-coded to true there is no issue because the audio never ends unless I hit stop button, which stops the audio service and also resets the button states.

这是一个问题，因为我设置 isLooping（）为false，这样的声音不循环。因此，音频将停止播放，但服务仍然在运行。

This is an issue now because I set isLooping() to false so the audio doesn't loop. So the audio will stop playing but the service is still running.

我希望能够检测到时，音频停止，所以我可以设置的UI按钮的状态。所以，我需要的东西，总是检查是否音频播放（即检查 player.isPlaying（）这样我就可以结束服务，设置启动/关闭按钮的状态。

I want to be able to detect when the audio stops so I can set the states of the UI buttons. So I need something that is always checking whether audio is playing (i.e. check player.isPlaying() so I can end the service and set the enable/disable state of the buttons.

我想通了绑定到该服务，所以我可以通过我的主要活动访问的MediaPlayer 控制，所以我知道的code，以检查它是否发挥，但如果我把这个code所以它检查了所有的时间呢？

I figured out binding to the service so I can access the MediaPlayer controls via my main activity so I know the code to check if it's playing, but WHERE do I put this code so it's checked all the time?

我是不是做有意义吗？我知道这可能是很简单的。感谢您的帮助。

Am I making sense? I know this is probably very simple. Thanks for any help.

推荐答案

您可以使用一个TimerTask和Timer重复。低于code：

You can repeat it with the TimerTask and Timer. Code below:

public final void RepeatSoundFunction(){ 

      t = new Timer();
      tt = new TimerTask() {

          @Override
          public void run() {
              mp.seekTo(0); //Reset sound to beginning position
              mp.start();  //Start the sound
              t.purge();  //Purge the sound
          }

      };
      t.schedule(tt, 10*1000); //Schedule to run tt (TimerTask) again after 10 seconds         
}

然后设置一个MediaPlayer的onCompletionListener，并在那里你把这个。

then you set a MediaPlayer onCompletionListener and in there you put this.

在运行 - code，你可以检查比其他的东西 音乐，我只显示与音频的例子。

Inside the run-code you can check for other things than music, I just show an example with the audio.

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