当surfaceview被破坏时，MediaPlayer会向前跳过几秒钟

Question

当表面视图被破坏时，我的媒体播放器会向前跳过几秒钟。 它是一个视频播放器，由 2 个片段组成。在每个片段中都有一个可以看到视频的表面视图。如果我在两个片段之间切换，我必须调用'mPlayer.setDisplay(surfaceHolder);'。否则不会显示视频。但是有一个问题是玩家向前跳了几秒钟。原因是当调用surfaceDestroyed 方法时视频缓冲区被转储。根据this

我已经对surfacetexture 和textureview 进行了一些尝试。 因此，我在我的 mainActivity 中声明了一个静态 SurfaceTexture 变量，当我在片段之间切换时我持有我的 surfaceTexture。切换后，我将表面纹理设置为纹理视图。

textureView.setSurfaceTexture(MainActivity.getSurfaceTexture());

这甚至在我第一次切换时也有效，而不会向前跳过或中断。但是当我第二次切换时，会抛出运行时异常..

attachToContext: GLConsumer is already attached to a context     
Shutting down VM   
W/dalvikvm(8400): threadid=1: thread exiting with uncaught exception (group=0xa4d25b20)   
FATAL EXCEPTION: main   
Process: info.androidhive.slidingmenu, PID: 8400   
java.lang.RuntimeException: Error during attachToGLContext (see logcat for details)   
at android.graphics.SurfaceTexture.attachToGLContext(SurfaceTexture.java:215)   
at android.view.GLES20TextureLayer.setSurfaceTexture(GLES20TextureLayer.java:86)    
at android.view.HardwareRenderer$Gl20Renderer.setSurfaceTexture(HardwareRenderer.java:2221)
at android.view.TextureView.getHardwareLayer(TextureView.java:401)   
at android.view.View.getDisplayList(View.java:13328)   
at android.view.View.getDisplayList(View.java:13404)   
at android.view.View.draw(View.java:14182)   
at android.view.ViewGroup.drawChild(ViewGroup.java:3103)   
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2940)   
at android.view.View.getDisplayList(View.java:13357)   
at android.view.View.getDisplayList(View.java:13404)   
at android.view.View.draw(View.java:14182)   
at android.view.ViewGroup.drawChild(ViewGroup.java:3103)   
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2940)   
at android.view.View.draw(View.java:14468)   
at android.view.View.getDisplayList(View.java:13362)   
at android.view.View.getDisplayList(View.java:13404)   
at android.view.View.draw(View.java:14182)   
at android.view.ViewGroup.drawChild(ViewGroup.java:3103)   
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2940)    
at android.view.View.getDisplayList(View.java:13357)   
at android.view.View.getDisplayList(View.java:13404)   
at android.view.View.draw(View.java:14182)   
at android.view.ViewGroup.drawChild(ViewGroup.java:3103)   
at android.support.v4.widget.DrawerLayout.drawChild(DrawerLayout.java:804)   
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2940)   
at android.view.View.getDisplayList(View.java:13357)    
at android.view.View.getDisplayList(View.java:13404)   
at android.view.View.draw(View.java:14182)   
at android.view.ViewGroup.drawChild(ViewGroup.java:3103)   
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2940)   
at android.view.View.getDisplayList(View.java:13357)    
at android.view.View.getDisplayList(View.java:13404)   
at android.view.View.draw(View.java:14182)   
at android.view.ViewGroup.drawChild(ViewGroup.java:3103)   
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2940)   
at android.view.View.draw(View.java:14468)    
at com.android.internal.widget.ActionBarOverlayLayout.draw(ActionBarOverlayLayout.java:381)
at android.view.View.getDisplayList(View.java:13362)   
at android.view.View.getDisplayList(View.java:13404)   
at android.view.View.draw(View.java:14182)   
at android.view.ViewGroup.drawChild(ViewGroup.java:3103)   
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2940)   
at android.view.View.draw(View.java:14468)   
at android.widget.FrameLayout.draw(FrameLayout.java:472)   
at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2326)   
at android.view.View.getDisplayList(View.java:13362)   
at android.view.View.getDisplayList(View.java:13404)   
at android.view.HardwareRenderer$GlRenderer.buildDisplayList(HardwareRenderer.java:1570)   
at android.view.HardwareRenderer$GlRenderer.draw(HardwareRenderer.java:1449)   
at android.view.ViewRootImpl.draw(ViewRootImpl.java:2377)    
at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2249)     
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1879)    
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:996)   
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5600)   
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)    
at android.view.Choreographer.doCallbacks(Choreographer.java:574)    
at android.view.Choreographer.doFrame(Choreographer.java:544)    
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)   
at android.os.Handler.handleCallback(Handler.java:733)   
at android.os.Handler.dispatchMessage(Handler.java:95)   
at android.os.Looper.loop(Looper.java:136)   
at android.app.ActivityThread.main(ActivityThread.java:5001)   
at java.lang.reflect.Method.invokeNative(Native Method)   
at java.lang.reflect.Method.invoke(Method.java:515)   
at com. 

有人知道为什么会调用这个异常吗？

Answer 1

当您尝试附加到仍然附加到不同视图的纹理时，会发生这种情况。您必须等待视图分离。这将在onDetachedFromWindow() 调用中发生。我知道这并不理想（我们一直在努力解决共享表面的视图之间的同步问题），但这是我唯一能真正想到的事情，除非 Android 决定让这种情况变得非致命。

您可以考虑将您的SurfaceTexture 的引用包装在一个跟踪它是否附加的类中（使用您对setSurfaceTexture() 和onDetachedFromWindow() 的调用，并且仅在包装后将您的第二个视图添加到层​​次结构中纹理知道它是分离的。