Question

嗨所有我是Android的新手，我尝试从Access Folder Android访问图像它的工作正常。以下是代码。

public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View v = inflater.inflate(R.layout.fragment_picturedetail, container, false);
    Bundle b = getArguments();
    Drawable d;
    am = getActivity().getAssets();
    PictDictDetails pd = (PictDictDetails) b.getSerializable("pictobj");
    ImageView iv = (ImageView)v.findViewById(R.id.iv_picture);
    TextView tv = (TextView)v.findViewById(R.id.tv_picture_name);
    String path = pd.getPath();
    String name = pd.getName();
    try
    {
        InputStream ims = am.open(path);
        d = Drawable.createFromStream(ims, null);
        iv.setImageDrawable(d);
    }
    catch(IOException e)
    {
        e.printStackTrace();
    }
}

现在我正在尝试使用完全相同的逻辑BUt在VideoView中播放视频它无法正常工作请找到以下代码，并帮助我在哪里错了？感谢您的帮助。

public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View v = inflater.inflate(R.layout.videofragment, container, false);
    Bundle b = getArguments();
    // Drawable d;
    am = getActivity().getAssets();
    PictDictDetails pd = (PictDictDetails) b.getSerializable("pictobj");
    VideoView iv = (VideoView)v.findViewById(R.id.iv_video);
    TextView tv = (TextView)v.findViewById(R.id.tv_picture_name);
    String path = pd.getPath();
    String name = pd.getName();

    SurfaceHolder holder = iv.getHolder();
    holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
    MediaPlayer player = new MediaPlayer();
    player.setDisplay(holder);
    //AssetFileDescriptor afd;

    try
    {
        //InputStream ims = am.open(path);
        // d = Drawable.createFromStream(ims, null);
        //iv.setImageDrawable(d);

        // AssetFileDescriptor descriptor = am.openFd(path);
        // long start = descriptor.getStartOffset();
        // long end = descriptor.getLength();

        /// mediaPlayer.setDataSource(descriptor.getFileDescriptor(),descriptor.getStartOffset(),descriptor.getLength());
        // MediaController mediaController= new MediaController();
        // mediaController.setAnchorView(iv);
        // iv.setMediaController(mediaController);
        AssetFileDescriptor afd = am.openFd(path);
        player.setDataSource(afd.getFileDescriptor(),afd.getStartOffset(), afd.getLength());
        player.prepareAsync();
        player.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
        @Override
        public void onPrepared(MediaPlayer mp) {
            mp.start();
        }
    });
}

Answer 1

注意：

1）您必须将视频复制到项目的res / raw文件夹中，而不是资产。

2）支持的格式（3gp，wmv，mp4），并在文件名中以小写，数字，下划线和点命名： video_file.mp4

VideoView videoView = (VideoView)this.findViewById(R.id.videoView)
String uri = "android.resource://" + getPackageName() + "/" + R.raw.video_file;
videoView.setVideoURI(Uri.parse(uri));
videoView.start();

您可以使用活动助手方法getPackageName()，在构建视频的正确URI时，代码可以使用该方法。

如何从Asset Folder Android 11播放mp4视频？

1 个答案: