make - recyclerview android design

Reproducción de video usando textureview en recyclerview

Question

Estoy tratando de implementar una lista con videos como vine o aplicación de Instagram. El lugar donde se reproducen los videos cuando se muestra el elemento de la lista o es completamente visible y el video se detiene cuando se oculta el elemento de la lista. Estoy usando textureview con el reproductor de medios para reproducir un video de url y lo agregué como elemento de lista en recyclerview. A continuación es mi código.

VideosAdapter Class:

public class VideosAdapter extends RecyclerView.Adapter<VideosAdapter.ViewHolder> {

Context context;
private ArrayList<String> urls;

public static class ViewHolder extends RecyclerView.ViewHolder {

    public LinearLayout layout;
    public TextView textView;

    public ViewHolder(View v) {
        super(v);
        layout = (LinearLayout) v.findViewById(R.id.linearLayout);
        textView = (TextView) v.findViewById(R.id.textView);
    }
}

public VideosAdapter(Context context, ArrayList<String> urls) {
    this.context = context;
    this.urls = urls;
}

// Create new views (invoked by the layout manager)
@Override
public VideosAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    // create a new view
    View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.view_main, parent, false);
    ViewHolder viewHolder = new ViewHolder(v);
    return viewHolder;
}

// Replace the contents of a view (invoked by the layout manager)
@Override
public void onBindViewHolder(ViewHolder holder, int position) {

    String url = urls.get(position);
    holder.textView.setText(url);
    playVideo(holder, url);
}

@Override
public int getItemCount() {
    return urls.size();
}

private void playVideo(ViewHolder holder, String url)
{
    final CustomVideoPlayer vid = new CustomVideoPlayer(String.valueOf(url), context);
    holder.layout.addView(vid);
    holder.layout.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            vid.changePlayState();
        }
    });
}
}

CustomVideoPlayer Class:

public class CustomVideoPlayer extends  TextureView implements TextureView.SurfaceTextureListener
{

Context context;
String url;
MediaPlayer mp;
Surface surface;
SurfaceTexture s;

public CustomVideoPlayer(Context context, AttributeSet attrs)
{
    super(context, attrs);
    this.context = context;
}

public CustomVideoPlayer(String ur, Context context)
{
    super(context);
    this.setSurfaceTextureListener(this);
    this.url = ur;
    this.context = context;

}

@Override
public void onSurfaceTextureAvailable(final SurfaceTexture surface, int arg1, int arg2) {

    this.s = surface;
    Log.d("url", this.url);
    startVideo(surface);
}
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture arg0) {

    return true;
}
@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture arg0, int arg1,int arg2) {
}
@Override
public void onSurfaceTextureUpdated(SurfaceTexture arg0) {
}

public void setVideo(String url)
{
    this.url = url;
}

public void startVideo(SurfaceTexture t)
{
    this.surface = new Surface(t);
    this.mp = new MediaPlayer();
    this.mp.setSurface(this.surface);
    try {
        Uri uri = Uri.parse(this.url);
        this.mp.setDataSource(url);
        this.mp.prepareAsync();

        this.mp.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            public void onPrepared(MediaPlayer mp) {

                mp.setLooping(true);
                mp.start();

            }
        });
    } catch (IllegalArgumentException e1) {
        e1.printStackTrace();
    } catch (SecurityException e1) {
        e1.printStackTrace();
    } catch (IllegalStateException e1) {
        e1.printStackTrace();
    } catch (IOException e1) {
        e1.printStackTrace();
    }
    try {

    } catch (IllegalArgumentException e) {
        e.printStackTrace();
    } catch (SecurityException e) {
        e.printStackTrace();
    } catch (IllegalStateException e) {
        e.printStackTrace();
    }
    try {

    } catch (IllegalStateException e) {
        e.printStackTrace();
    }


}

public void changePlayState()
{
    if(this.mp.isPlaying())
        this.mp.pause();
    else
        this.mp.start();
}
}

Cuando ejecuto este código hay varios problemas en él.

1) Primero dos buffers de elementos / videos y jugar bien. Pero cuando me desplazo, no se carga el tercer video y el primer video también se elimina de la lista.

2) En los videos de desplazamiento / elementos de la lista se inicia nuevamente el almacenamiento en búfer para el elemento que ya estaba almacenado.

3) En la lista de desplazamiento rápido se retrasa demasiado y se atasca y se bloquea.

Se adjunta la imagen de logcat que obtengo mientras se desplaza la lista y se reproduce el video.

¿Alguien puede guiarme a través de esto? ¿Cuál es la forma correcta de crear una lista como la aplicación de vid?

Answer 1

¿Por qué no agrega la vista de video personalizada en el archivo de diseño ''view_main''? Verifique la visibilidad de la vista de video y reproduzca solo si la vista es visible.

public static boolean isViewVisible(View subView, View parentView) {
    Rect scrollBounds = new Rect();
    parentView.getHitRect(scrollBounds);
    if (subView.getLocalVisibleRect(scrollBounds)) {
        return true;
    }
    return false;
}

Código de comprobación de visibilidad. Llamar a esto en estado de desplazamiento. Se ha cambiado la escucha cuando el estado de desplazamiento está inactivo.

También tendrá que usar una AsyncTask para descargar videos, pero solo descargar un video a la vez o podría salir de un error de memoria.

Answer 2

Debería mantener un caché de videos localmente descargándolos en el backend y reproduciendo un video a la vez desde la memoria local para que la lista se desplace sin problemas.

Answer 3

Pude lograrlo al descargar primero los videos de la URL y luego reproducirlos con un reproductor personalizado. Así es como lo hice en caso de que alguien más lo necesitara:

1) Obtener todas las necesidades de url para ser jugado

2) Comience a descargar videos (en la cola) de las URL en el almacenamiento local y mantenga una marca en las preferencias (que un video ya está descargado)

3) Asigne URL al adaptador en el que inicialice el objeto del controlador del reproductor de video que maneja las reproducciones de video

4) Establezca addOnScrollListener para verificar qué posición / video está visible actualmente y verifique si el video ya está descargado o no, si sí, reprodúzcalo.

El siguiente es el código completo:

Actividad principal

public class MainActivity extends ActionBarActivity implements IVideoDownloadListener {

private static String TAG = "MainActivity";

private Context context;
private RecyclerView mRecyclerView;
private ProgressBar progressBar;
private VideosAdapter mAdapter;
private RecyclerView.LayoutManager mLayoutManager;
private ArrayList<Video> urls;
VideosDownloader videosDownloader;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    context = MainActivity.this;
    mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);
    progressBar = (ProgressBar) findViewById(R.id.progressBar);
    urls = new ArrayList<Video>();
    mRecyclerView.setHasFixedSize(true);
    mLayoutManager = new LinearLayoutManager(this);
    mRecyclerView.setLayoutManager(mLayoutManager);
    mAdapter = new VideosAdapter(MainActivity.this, urls);
    mRecyclerView.setAdapter(mAdapter);

    videosDownloader = new VideosDownloader(context);
    videosDownloader.setOnVideoDownloadListener(this);

    if(Utils.hasConnection(context))
    {
        getVideoUrls();

        mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);
            }

            @Override
            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                super.onScrollStateChanged(recyclerView, newState);

                if (newState == RecyclerView.SCROLL_STATE_IDLE) {

                    LinearLayoutManager layoutManager = ((LinearLayoutManager) recyclerView.getLayoutManager());
                    int firstVisiblePosition = layoutManager.findFirstVisibleItemPosition();
                    int findFirstCompletelyVisibleItemPosition = layoutManager.findFirstCompletelyVisibleItemPosition();

                    Video video;
                    if (urls != null && urls.size() > 0)
                    {
                        if (findFirstCompletelyVisibleItemPosition >= 0) {
                            video = urls.get(findFirstCompletelyVisibleItemPosition);
                            mAdapter.videoPlayerController.setcurrentPositionOfItemToPlay(findFirstCompletelyVisibleItemPosition);
                            mAdapter.videoPlayerController.handlePlayBack(video);
                        }
                        else
                        {
                            video = urls.get(firstVisiblePosition);
                            mAdapter.videoPlayerController.setcurrentPositionOfItemToPlay(firstVisiblePosition);
                            mAdapter.videoPlayerController.handlePlayBack(video);
                        }
                    }
                }
            }
        });
    }
    else
        Toast.makeText(context, "No internet available", Toast.LENGTH_LONG).show();
}

@Override
public void onVideoDownloaded(Video video) {
    mAdapter.videoPlayerController.handlePlayBack(video);
}

private void getVideoUrls()
{
    Video video1 = new Video("0", "1", "http://techslides.com/demos/sample-videos/small.mp4");
    urls.add(video1);
    Video video2 = new Video("1", "2", "http://www.quirksmode.org/html5/videos/big_buck_bunny.mp4");
    urls.add(video2);
    Video video3 = new Video("2", "3", "http://sample-videos.com/video/mp4/720/big_buck_bunny_720p_1mb.mp4");
    urls.add(video3);
    Video video4 = new Video("3", "4", "http://dev.exiv2.org/attachments/341/video-2012-07-05-02-29-27.mp4");
    urls.add(video4);
    Video video5 = new Video("4", "5", "http://techslides.com/demos/sample-videos/small.mp4");
    urls.add(video5);
    Video video6 = new Video("5", "6", "http://www.quirksmode.org/html5/videos/big_buck_bunny.mp4");
    urls.add(video6);
    Video video7 = new Video("6", "7", "http://sample-videos.com/video/mp4/720/big_buck_bunny_720p_1mb.mp4");
    urls.add(video7);

    mAdapter.notifyDataSetChanged();
    progressBar.setVisibility(View.GONE);
    videosDownloader.startVideosDownloading(urls);
 }
}

VideosAdapter

public class VideosAdapter extends RecyclerView.Adapter<VideosAdapter.ViewHolder> {

private static String TAG = "VideosAdapter";

Context context;
private ArrayList<Video> urls;
public VideoPlayerController videoPlayerController;

public static class ViewHolder extends RecyclerView.ViewHolder {

    public TextView textView;
    public ProgressBar progressBar;
    public RelativeLayout layout;

    public ViewHolder(View v) {
        super(v);
        layout = (RelativeLayout) v.findViewById(R.id.layout);
        textView = (TextView) v.findViewById(R.id.textView);
        progressBar = (ProgressBar) v.findViewById(R.id.progressBar);

    }
}

public VideosAdapter(Context context, final ArrayList<Video> urls) {

    this.context = context;
    this.urls = urls;
    videoPlayerController = new VideoPlayerController(context);
}

// Create new views (invoked by the layout manager)
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    // create a new view
    View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.view_main, parent, false);

    Configuration configuration = context.getResources().getConfiguration();
    int screenWidthDp = configuration.screenWidthDp; //The current width of the available screen space, in dp units, corresponding to screen width resource qualifier.
    int smallestScreenWidthDp = configuration.smallestScreenWidthDp; //The smallest screen size an application will see in normal operation, corresponding to smallest screen width resource qualifier.

    ViewHolder viewHolder = new ViewHolder(v);

    int screenWidthPixels = Utils.convertDpToPixel(screenWidthDp, context);
    RelativeLayout.LayoutParams rel_btn = new RelativeLayout.LayoutParams(
            ViewGroup.LayoutParams.MATCH_PARENT, screenWidthPixels);
    viewHolder.layout.setLayoutParams(rel_btn);

    return viewHolder;
}

// Replace the contents of a view (invoked by the layout manager)
@Override
public void onBindViewHolder(final ViewHolder holder, int position) {

    Video video = urls.get(position);
    holder.textView.setText("Video " + video.getId());

    final VideoPlayer videoPlayer = new VideoPlayer(context);
    RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);
    videoPlayer.setLayoutParams(params);

    holder.layout.addView(videoPlayer);
    videoPlayerController.loadVideo(video, videoPlayer, holder.progressBar);
    videoPlayer.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            videoPlayer.changePlayState();
        }
    });
}

@Override
public void onViewRecycled(ViewHolder holder) {
    super.onViewRecycled(holder);
    Log.d(TAG, "onViewRecycledCalled");
    holder.layout.removeAllViews();

}

@Override
public int getItemCount() {
    return urls.size();
}

}

VideosDescargador

public class VideosDownloader {

private static String TAG = "VideosDownloader";

Context context;
FileCache fileCache;
IVideoDownloadListener iVideoDownloadListener;

public VideosDownloader(Context context) {
    this.context = context;
    fileCache = new FileCache(context);
}

/////////////////////////////////////////////////////////////////
// Start downloading all videos from given urls

public void startVideosDownloading(final ArrayList<Video> videosList)
{
    Thread thread = new Thread(new Runnable() {
        @Override
        public void run()
        {
            for(int i=0; i<videosList.size(); i++)
            {
                final Video video = videosList.get(i);
                String id = video.getId();
                String url = video.getUrl();

                String isVideoDownloaded = Utils.readPreferences(context, video.getUrl(), "false");
                boolean isVideoAvailable = Boolean.valueOf(isVideoDownloaded);
                if(!isVideoAvailable)
                {
                    //Download video from url
                    String downloadedPath = downloadVideo(url);
                    //Log.i(TAG, "Vides downloaded at: " + downloadedPath);
                    Activity activity = (Activity) context;
                    activity.runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            Utils.savePreferences(context, video.getUrl(), "true");
                             iVideoDownloadListener.onVideoDownloaded(video);
                        }
                    });
                }

            }
        }
    });
    thread.start();
}

/////////////////////////////////////////////////////////////////

private String downloadVideo(String urlStr)
{
    URL url = null;
    File file = null;
    try
    {
        file = fileCache.getFile(urlStr);
        url = new URL(urlStr);
        long startTime = System.currentTimeMillis();
        URLConnection ucon = null;
        ucon = url.openConnection();
        InputStream is = ucon.getInputStream();
        BufferedInputStream inStream = new BufferedInputStream(is, 1024 * 5);
        FileOutputStream outStream = new FileOutputStream(file);
        byte[] buff = new byte[5 * 1024];

        //Read bytes (and store them) until there is nothing more to read(-1)
        int len;
        while ((len = inStream.read(buff)) != -1) {
            outStream.write(buff, 0, len);
        }

        //clean up
        outStream.flush();
        outStream.close();
        inStream.close();

    }
    catch (MalformedURLException e) {
        e.printStackTrace();
    }
    catch (IOException e) {
        e.printStackTrace();
    }
    return file.getAbsolutePath();
}


public void setOnVideoDownloadListener(IVideoDownloadListener iVideoDownloadListener) {
    this.iVideoDownloadListener = iVideoDownloadListener;
}
}

VideoPlayerController

public class VideoPlayerController {

private static String TAG = "VideoPlayerController";

Context context;
FileCache fileCache;
int currentPositionOfItemToPlay = 0;
Video currentPlayingVideo;

private Map<String, VideoPlayer> videos = Collections.synchronizedMap(new WeakHashMap<String, VideoPlayer>());
private Map<String, ProgressBar> videosSpinner = Collections.synchronizedMap(new WeakHashMap<String, ProgressBar>());

public VideoPlayerController(Context context) {

    this.context = context;
    fileCache = new FileCache(context);
}

public void loadVideo(Video video, VideoPlayer videoPlayer, ProgressBar progressBar) {

    //Add video to map
    videos.put(video.getIndexPosition(), videoPlayer);
    videosSpinner.put(video.getIndexPosition(), progressBar);

    handlePlayBack(video);
}

//This method would check two things
//First if video is downloaded or its local path exist
//Second if the videoplayer of this video is currently showing in the list or visible

public void handlePlayBack(Video video)
{
    //Check if video is available
    if(isVideoDownloaded(video))
    {

        // then check if it is currently at a visible or playable position in the listview
        if(isVideoVisible(video))
        {
            //IF yes then playvideo
            playVideo(video);
        }
    }
}

private void playVideo(final Video video)
{
    //Before playing it check if this video is already playing

    if(currentPlayingVideo != video)
    {
        //Start playing new url
        if(videos.containsKey(video.getIndexPosition()))
        {
            final VideoPlayer videoPlayer2 = videos.get(video.getIndexPosition());
            String localPath = fileCache.getFile(video.getUrl()).getAbsolutePath();
            if(!videoPlayer2.isLoaded)
            {
                videoPlayer2.loadVideo(localPath, video);
                videoPlayer2.setOnVideoPreparedListener(new IVideoPreparedListener() {
                    @Override
                    public void onVideoPrepared(Video mVideo) {

                        //Pause current playing video if any
                        if(video.getIndexPosition() == mVideo.getIndexPosition())
                        {
                            if(currentPlayingVideo!=null)
                            {
                                VideoPlayer videoPlayer1 = videos.get(currentPlayingVideo.getIndexPosition());
                                videoPlayer1.pausePlay();
                            }
                            videoPlayer2.mp.start();
                            currentPlayingVideo = mVideo;
                        }


                    }
                });
            }
            else
            {
                //Pause current playing video if any
                if(currentPlayingVideo!=null)
                {
                    VideoPlayer videoPlayer1 = videos.get(currentPlayingVideo.getIndexPosition());
                    videoPlayer1.pausePlay();
                }

                boolean isStarted = videoPlayer2.startPlay();
                {
                    //Log.i(TAG, "Started playing Video Index: " + video.getIndexPosition());
                    //Log.i(TAG, "Started playing Video: " + video.getUrl());
                }
                currentPlayingVideo = video;
            }
        }
    }
    else
    {
        //Log.i(TAG, "Already playing Video: " + video.getUrl());
    }

}

private boolean isVideoVisible(Video video) {

    //To check if the video is visible in the listview or it is currently at a playable position
    //we need the position of this video in listview and current scroll position of the listview
    int positionOfVideo = Integer.valueOf(video.getIndexPosition());

    if(currentPositionOfItemToPlay == positionOfVideo)
        return true;

    return false;
}

private boolean isVideoDownloaded(Video video) {

    String isVideoDownloaded = Utils.readPreferences(context, video.getUrl(), "false");
    boolean isVideoAvailable = Boolean.valueOf(isVideoDownloaded);
    if(isVideoAvailable)
    {
        //If video is downloaded then hide its progress
        hideProgressSpinner(video);
        return true;
    }

    showProgressSpinner(video);
    return false;
}

private void showProgressSpinner(Video video) {
    ProgressBar progressBar = videosSpinner.get(video.getIndexPosition());
    if(progressBar!=null)
        progressBar.setVisibility(View.VISIBLE);
}

private void hideProgressSpinner(Video video) {

    ProgressBar progressBar = videosSpinner.get(video.getIndexPosition());
    if(progressBar!=null && progressBar.isShown())
    {
        progressBar.setVisibility(View.GONE);
        Log.i(TAG, "ProgressSpinner Hided Index: " + video.getIndexPosition());
    }
}

public void setcurrentPositionOfItemToPlay(int mCurrentPositionOfItemToPlay) {
    currentPositionOfItemToPlay = mCurrentPositionOfItemToPlay;
}
}

Reproductor de video

public class VideoPlayer extends TextureView implements TextureView.SurfaceTextureListener {

private static String TAG = "VideoPlayer";

/**This flag determines that if current VideoPlayer object is first item of the list if it is first item of list*/
boolean isFirstListItem;

boolean isLoaded;
boolean isMpPrepared;

IVideoPreparedListener iVideoPreparedListener;

Video video;
String url;
MediaPlayer mp;
Surface surface;
SurfaceTexture s;

public VideoPlayer(Context context) {
    super(context);
}

public VideoPlayer(Context context, AttributeSet attrs)
{
    super(context, attrs);
}

public void loadVideo(String localPath, Video video) {

    this.url = localPath;
    this.video = video;
    isLoaded = true;

    if (this.isAvailable()) {
        prepareVideo(getSurfaceTexture());
    }

    setSurfaceTextureListener(this);
}

@Override
public void onSurfaceTextureAvailable(final SurfaceTexture surface, int width, int height) {
    isMpPrepared = false;
    prepareVideo(surface);
}

@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {

}

@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {

    if(mp!=null)
    {
        mp.stop();
        mp.reset();
        mp.release();
        mp = null;
    }

    return false;
}

@Override
public void onSurfaceTextureUpdated(SurfaceTexture surface) {
}

public void prepareVideo(SurfaceTexture t)
{

    this.surface = new Surface(t);
    mp = new MediaPlayer();
    mp.setSurface(this.surface);

    try {
        mp.setDataSource(url);
        mp.prepareAsync();

        mp.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            public void onPrepared(MediaPlayer mp) {
                isMpPrepared = true;
                mp.setLooping(true);
                iVideoPreparedListener.onVideoPrepared(video);
            }


        });
    } catch (IllegalArgumentException e1) {
        e1.printStackTrace();
    } catch (SecurityException e1) {
        e1.printStackTrace();
    } catch (IllegalStateException e1) {
        e1.printStackTrace();
    } catch (IOException e1) {
        e1.printStackTrace();
    }
    try {

    } catch (IllegalArgumentException e) {
        e.printStackTrace();
    } catch (SecurityException e) {
        e.printStackTrace();
    } catch (IllegalStateException e) {
        e.printStackTrace();
    }
    try {

    } catch (IllegalStateException e) {
        e.printStackTrace();
    }

}

@Override
protected void onAttachedToWindow() {
    super.onAttachedToWindow();
}

@Override
protected void onVisibilityChanged(View changedView, int visibility) {
    super.onVisibilityChanged(changedView, visibility);
}

public boolean startPlay()
{
    if(mp!=null)
        if(!mp.isPlaying())
        {
            mp.start();
            return true;
        }

    return false;
}

public void pausePlay()
{
    if(mp!=null)
        mp.pause();
}

public void stopPlay()
{
    if(mp!=null)
        mp.stop();
}

public void changePlayState()
{
    if(mp!=null)
    {
        if(mp.isPlaying())
            mp.pause();
        else
            mp.start();
    }

}

public void setOnVideoPreparedListener(IVideoPreparedListener iVideoPreparedListener) {
    this.iVideoPreparedListener = iVideoPreparedListener;
}
}

IVideoDownloadListener

public interface IVideoDownloadListener {
public void onVideoDownloaded(Video video);
}

IVideoPreparedListener

public interface IVideoPreparedListener {

public void onVideoPrepared(Video video);
}