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POAndroid: How to create video player?
 

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  1. POAndroid: How to create video player?
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    <p>I am creating a video recorder and would like to create video player to preview the recorded videos. Modifying the code <a href="http://davanum.wordpress.com/2007/12/29/android-videomusic-player-sample-from-local-disk-as-well-as-remote-urls/" rel="noreferrer">from this page</a> I have created a MediaPreview class the following way:</p> <pre><code>public class MediaPreview extends Activity implements OnErrorListener, OnBufferingUpdateListener, OnCompletionListener, OnPreparedListener, SurfaceHolder.Callback{ private static final String TAG = "MediaPreview"; private MediaPlayer mp; private SurfaceView mPreview; private SurfaceHolder holder; private Button btnPlay; private Button btnPause; private Button btnReset; private Button btnStop; private String mPath; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.media_preview); mPreview = (SurfaceView)findViewById(R.id.mPreview); btnPlay = (Button)findViewById(R.id.btnPlay); btnPause = (Button)findViewById(R.id.btnPause); btnReset = (Button)findViewById(R.id.btnReset); btnStop = (Button)findViewById(R.id.btnStop); getPathFromParentDialog(); btnPlay.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View v) { playVideo(); } }); btnPause.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View v) { // TODO Auto-generated method stub if(mp != null){ mp.pause(); } } }); btnReset.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View v) { if(mp != null){ mp.seekTo(0); } } }); btnStop.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View v) { if(mp != null){ mp.stop(); mp.release(); } } }); getWindow().setFormat(PixelFormat.TRANSPARENT); holder = mPreview.getHolder(); holder.addCallback(this); holder.setFixedSize(400, 300); } @Override protected void onResume() { setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); super.onResume(); } @Override public boolean onError(MediaPlayer mp, int what, int extra) { if(mp != null){ mp.stop(); mp.release(); } return false; } @Override public void onBufferingUpdate(MediaPlayer mp, int percent) { // TODO Auto-generated method stub } @Override public void onCompletion(MediaPlayer mp) { // TODO Auto-generated method stub } @Override public void onPrepared(MediaPlayer mp) { // TODO Auto-generated method stub } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { // TODO Auto-generated method stub } @Override public void surfaceCreated(SurfaceHolder holder) { // TODO Auto-generated method stub } @Override public void surfaceDestroyed(SurfaceHolder holder) { // TODO Auto-generated method stub } private void playVideo() { try{ mp = new MediaPlayer(); mp.setOnErrorListener(this); mp.setOnBufferingUpdateListener(this); mp.setOnCompletionListener(this); mp.setOnPreparedListener(this); mp.setAudioStreamType(2); mp.setDisplay(mPreview.getHolder()); Runnable r = new Runnable(){ @Override public void run() { try{ setDataSource(mPath); } catch(Exception ex){ Log.e(TAG, ex.getMessage()); } try { mp.prepare(); Log.v(TAG, "Duration: ===&gt; " + mp.getDuration()); } catch (IllegalStateException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); Log.e(TAG, e.getMessage()); } mp.start(); } }; new Thread(r).start(); } catch(Exception ex){ String sDummy = ex.toString(); if(mp != null){ mp.stop(); mp.release(); } } } private void setDataSource(String path) throws IOException { if(!URLUtil.isNetworkUrl(mPath)){ mp.setDataSource(mPath); } else{ URL url = new URL(mPath); URLConnection cn = url.openConnection(); cn.connect(); InputStream stream = cn.getInputStream(); if(stream == null){ throw new RuntimeException("stream is null"); } File fileTemp = File.createTempFile("mediaplayerTmp", "dat"); String tempPath = fileTemp.getAbsolutePath(); FileOutputStream out = new FileOutputStream(fileTemp); byte buf[] = new byte[128]; do{ int numRead = stream.read(buf); if(numRead &lt;= 0){ break; } out.write(buf, 0, numRead); }while(true); mp.setDataSource(tempPath); try{ stream.close(); } catch(Exception ex){ String sDummy = ex.toString(); } } } private void getPathFromParentDialog() { Intent intent = getIntent(); mPath = intent.getExtras().getString(MediaLibrary.FILENAME); } } </code></pre> <p>The code successfully executes (without any exceptions) <code>until mp.start();</code>, but the screen is blank (there are only buttons on the screen).</p> <p>Does anyone know what could be wrong in the code above or is there any example that works available on the web?</p> <p>I would really appreciate your help</p>
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      1. USNirav Bhandari
 

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