我一直在爲此苦苦掙扎2天... 遵循這個問題:https://stackoverflow.com/a/2006454/444324 - 提到可以通過改變MediaPlayerDemo_Video例子來播放GLSurfaceView中的視頻在API演示:在GLSurfaceView而不是SurfaceView中播放視頻
所有你需要做的還有一個 GLSurfaceView更換SurfaceView中均MediaPlayerDemo_Video.java在相應的佈局文件(mediaplayer_2.xml)文件以及 。
此外,您還需要創建一個自定義Renderer類(一個實現 GLSurfaceView.Renderer接口)並將其設置爲您的 GLSurfaceView。
我試着更換SurfaceView到GLSurfaceView的建議,也using this但它只是崩潰的開始:
07-11 14:54:22.086: E/AndroidRuntime(12373): FATAL EXCEPTION: main
07-11 14:54:22.086: E/AndroidRuntime(12373): java.lang.NullPointerException
07-11 14:54:22.086: E/AndroidRuntime(12373): at android.opengl.GLSurfaceView.surfaceCreated(GLSurfaceView.java:512)
07-11 14:54:22.086: E/AndroidRuntime(12373): at android.view.SurfaceView.updateWindow(SurfaceView.java:533)
07-11 14:54:22.086: E/AndroidRuntime(12373): at android.view.SurfaceView.access$000(SurfaceView.java:81)
07-11 14:54:22.086: E/AndroidRuntime(12373): at android.view.SurfaceView$3.onPreDraw(SurfaceView.java:169)
07-11 14:54:22.086: E/AndroidRuntime(12373): at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:590)
07-11 14:54:22.086: E/AndroidRuntime(12373): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1617)
07-11 14:54:22.086: E/AndroidRuntime(12373): at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2442)
07-11 14:54:22.086: E/AndroidRuntime(12373): at android.os.Handler.dispatchMessage(Handler.java:99)
07-11 14:54:22.086: E/AndroidRuntime(12373): at android.os.Looper.loop(Looper.java:137)
07-11 14:54:22.086: E/AndroidRuntime(12373): at android.app.ActivityThread.main(ActivityThread.java:4575)
07-11 14:54:22.086: E/AndroidRuntime(12373): at java.lang.reflect.Method.invokeNative(Native Method)
07-11 14:54:22.086: E/AndroidRuntime(12373): at java.lang.reflect.Method.invoke(Method.java:511)
07-11 14:54:22.086: E/AndroidRuntime(12373): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
07-11 14:54:22.086: E/AndroidRuntime(12373): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
07-11 14:54:22.086: E/AndroidRuntime(12373): at dalvik.system.NativeStart.main(Native Method)
我知道我可以使用一個VideoView播放視頻,或只是留在SurfaceView與MediaPlayer,但我必須使用GLSurfaceView,因爲我需要此視頻在相機表面視圖頂部播放。
謝謝!
相關代碼: 我的XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<com.commonsware.android.camera.MyGLSurfaceView
android:id="@+id/surface"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center" />
</LinearLayout>
我的班級:
public class MediaPlayerDemo_Video extends Activity implements
OnBufferingUpdateListener, OnCompletionListener,
OnPreparedListener, OnVideoSizeChangedListener, SurfaceHolder.Callback {
private MediaPlayer mMediaPlayer;
private MyGLSurfaceView mPreview;
private SurfaceHolder holder;
/**
*
* Called when the activity is first created.
*/
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.mediaplayer_2);
mPreview = (MyGLSurfaceView) findViewById(R.id.surface);
holder = mPreview.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
}
MyGLSurfaceView類:
class MyGLSurfaceView extends android.opengl.GLSurfaceView {
public MyGLSurfaceView(Context context, AttributeSet attrs) {
super(context, attrs);
}
}
正如我所提到的「看起來像一個相當簡單的鑄造錯誤,但我找不到任何理由......」我不知道爲什麼它打印此錯誤消息。因爲我只用我的GLSurfaceView直接...在XML中我使用:com.commonsware.android.camera.GLSurfaceView和在Java中我導入我的類和導入是好的... – 2012-07-11 11:38:15
更新了我的問題與相關的代碼 – 2012-07-11 11:44:55