android - 扩展文件中 VideoView 的 MediaPlayer.prepareAsync() 中的 IllegalStateException

Question

我有一个包含 mp4 视频的扩展文件 (zip)，我想用 VideoView 播放这些视频。当调用 videoView.setVideoURI() 时，它会在我的 VideoView 的 openVideo() 中抛出 IllegalStateException(在状态 1 中调用 prepareAsync)。我从扩展的 APEZProvider 类中检索视频的 URI。

扩展文件如下打包并重命名为“main.3.com.my.application.obb”

zip -r -0 [desiredZipFileName.obb] [folderWithVideos]

视频 View :

Uri uri = ExpansionAPEZProvider.buildUri("vid_intro.mp4");
videoView = (VideoView) activity.findViewById(R.id.videoview);
videoView.setVideoURI(uri);
videoView.requestFocus();
videoView.start();

自定义 APEZ 提供程序类。

public class ExpansionAPEZProvider extends APEZProvider {

private static final String AUTHORITY = AndroidApplication.getApplication().getPackageName() + ".provider." + ExpansionAPEZProvider.class.getSimpleName();

    @Override
    public String getAuthority() {
        return AUTHORITY;
    }

    public static Uri buildUri(String path) {
        StringBuilder contentPath = new StringBuilder("content://");
        contentPath.append(AUTHORITY);
        contentPath.append(File.separator);
        contentPath.append(path);

        String newPath = contentPath.toString();

        return Uri.parse(newPath);
    }
}

buildUri() 返回这样的 URI

"content://com.my.application.provider.ExpansionAPEZProvider/vid_intro.mp4"

list 中的提供者:

<provider android:name=".ExpansionAPEZProvider"
        android:authorities="com.my.application.provider.ExpansionAPEZProvider"
        android:exported="false"
        android:multiprocess="true">

        <meta-data
            android:name="mainVersion"
            android:value="3"/>
    </provider>

堆栈跟踪

    V/WindowManager(  749): Adding window Window{683bb62 u0 SurfaceView} at 13 of 21 (before Window{22e3dff1 u0 com.my.application/com.my.application.activity.StartActivity})
    I/MediaFocusControl(  749):  AudioFocus  requestAudioFocus() from android.media.AudioManager@2335d19 req=1flags=0x0
    E/MediaPlayer(15769): prepareAsync called in state 1
    D/AndroidRuntime(15769): Shutting down VM
    E/AndroidRuntime(15769): FATAL EXCEPTION: main
    E/AndroidRuntime(15769): Process: com.my.application, PID: 15769
    E/AndroidRuntime(15769): java.lang.IllegalStateException
    E/AndroidRuntime(15769):    at android.media.MediaPlayer.prepareAsync(Native Method)
    E/AndroidRuntime(15769):    at android.widget.VideoView.openVideo(VideoView.java:356)
    E/AndroidRuntime(15769):    at android.widget.VideoView.access$2100(VideoView.java:72)
    E/AndroidRuntime(15769):    at android.widget.VideoView$7.surfaceCreated(VideoView.java:628)
    E/AndroidRuntime(15769):    at android.view.SurfaceView.updateWindow(SurfaceView.java:580)
    E/AndroidRuntime(15769):    at android.view.SurfaceView$3.onPreDraw(SurfaceView.java:176)
    E/AndroidRuntime(15769):    at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:944)
    E/AndroidRuntime(15769):    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1970)
    E/AndroidRuntime(15769):    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1061)
    E/AndroidRuntime(15769):    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5885)
    E/AndroidRuntime(15769):    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
    E/AndroidRuntime(15769):    at android.view.Choreographer.doCallbacks(Choreographer.java:580)
    E/AndroidRuntime(15769):    at android.view.Choreographer.doFrame(Choreographer.java:550)
    E/AndroidRuntime(15769):    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
    E/AndroidRuntime(15769):    at android.os.Handler.handleCallback(Handler.java:739)
    E/AndroidRuntime(15769):    at android.os.Handler.dispatchMessage(Handler.java:95)
    E/AndroidRuntime(15769):    at android.os.Looper.loop(Looper.java:135)
    E/AndroidRuntime(15769):    at android.app.ActivityThread.main(ActivityThread.java:5254)
    E/AndroidRuntime(15769):    at java.lang.reflect.Method.invoke(Native Method)
    E/AndroidRuntime(15769):    at java.lang.reflect.Method.invoke(Method.java:372)
    E/AndroidRuntime(15769):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
    E/AndroidRuntime(15769):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
    W/ActivityManager(  749):   Force finishing activity 1 com.my.application/.activity.StartActivity
    W/DropBoxManagerService(  749): Dropping: data_app_crash (1630 > 0 bytes)
    I/WindowManager(  749): Screenshot max retries 4 of Token{2d07c562 ActivityRecord{3b01f344 u0 com.my.application/.activity.StartActivity t8900 f}} appWin=Window{683bb62 u0 SurfaceView} drawState=3

谢谢你的帮助

Answer 1

我修好了。 zip/obb 文件一定已经损坏。我按照上面帖子中的描述通过终端再次打包它，现在它可以工作了。我花了很长时间才找到问题所在。FileNotFoundException 或 IOException 而不是 IllegalStateException 对我定位问题更有帮助。