Android：在活动屏幕方向更新期间保持 MediaPlayer 运行
我使用 MediaPlayer 来播放 MP3。目前，我通过
android:screenOrientation="portrait"
android:configChanges="keyboardHidden|orientation"
在清单中使用禁用了屏幕方向更改。我现在确实想支持横向模式 - 即删除了这些标签 - 但有一个问题，在销毁/创建周期期间，播放器停止然后重新启动。这没关系，实际上我什至在 onPause() 中手动执行此操作，以在活动进入后台时停止播放器。
现在，为了使其在方向更改期间保持运行，我尝试将其设为静态（并使用应用程序上下文创建一次）。当然，当我现在删除 onPause() 中的 player.stop() 时，它会执行我想要的操作 - 好吧，直到 Activity进入后台。
因此，有两个问题：
- 如何确定在调用
onStop()之后是否会直接重新创建 Activity - 或者：如何在该周期内保持
MediaPlayer运行，但当应用程序进入后台时停止它？
I use a MediaPlayer to play an MP3. Currently I disabled screen orientation changes by using
android:screenOrientation="portrait"
android:configChanges="keyboardHidden|orientation"
in the manifest. I do want to support landscape mode now - i.e. removed those tags - but have the problem that during the destroy/create cycle the player gets stopped and then restarted. This is okay and I actually do this even manually in onPause() to stop the player when the activity goes in the background.
To keep it running during orientation changes now, I tried making it static (and using the Application Context to create it once). Of course, when I remove the player.stop() in onPause() now, it does what I want - well, until the Activity goes in the background.
So, two questions:
- How can I determine if the Activity will be recreated directly after the call to
onStop() - Or: How can I keep the
MediaPlayerrunning during that cycle, yet stop it when the App goes in the background?
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您是否看过使用 onConfigurationChanged () 回调来处理一些这样的逻辑？
Have you looked at using the onConfigurationChanged() callback to handle some of this logic?
关于您的问题如何可靠地确定您的 Activity 是否由于配置更改而被销毁，请参阅我的答案：如何在屏幕期间保存/恢复（更新）对话框的引用旋转？（我需要在活动的 onCreate 方法中引用。）
有了这个，你的第二个问题的答案应该很容易。
Regarding your question how you can reliably determine whether your Activity is destroyed due to a configuration change, see my answer here: How to save/restore(update) ref to the dialog during screen rotation?(I need ref in onCreate method of activity.)
With this, the answer to your second question should be easy.
尝试在不同的线程中运行
MediaPlayer。您可以向该线程添加一个更复杂的 API，您可以从
onCreate/onStop/on*调用该 APITry running
MediaPlayerin different Thread.You can add to this thread a more complex API to which you can call from
onCreate/onStop/on*如果您正在使用片段（您应该：P），那么在片段 onCreate() 调用中调用
setRetainInstance(true)将使这个问题完全消失。If you are using fragments (and you should :P), then calling
setRetainInstance(true)inside your fragments onCreate() call will make this problem go completely go away.请参阅以下答案： https://stackoverflow.com/a/31466602/994021
这是我的一个 POC为此目的而创建。厌倦了为不同的项目一遍又一遍地解决这个问题。我希望它有帮助。
我真的建议切换到第三方播放器，例如 Google 的 ExoPlayer： https://github.com/google/ Exo播放器
Please see the following answer: https://stackoverflow.com/a/31466602/994021
It is a POC I've created for this purpose. Tired of solving this issue over and over again for different projects. I hope it helps.
I really recommend to switch to a third party player like ExoPlayer from google guys: https://github.com/google/ExoPlayer