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我正在使用此Java代碼在Android中播放視頻。但它只顯示黑屏。視頻屏幕未在Android中顯示
我該如何解決這個問題？
package org.apache.android.media;
import android.app.Activity;
import android.content.Context;
import android.graphics.PixelFormat;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnBufferingUpdateListener;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaPlayer.OnErrorListener;
import android.os.Bundle;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.webkit.URLUtil;
import android.widget.EditText;
import android.widget.ImageButton;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
public class VideoViewDemo extends Activity implements OnErrorListener,
OnBufferingUpdateListener, OnCompletionListener,
MediaPlayer.OnPreparedListener, SurfaceHolder.Callback {
private static final String TAG = "VideoPlayer";
private MediaPlayer mp;
private SurfaceView mPreview;
private EditText mPath;
private SurfaceHolder holder;
private ImageButton mPlay;
private ImageButton mPause;
private ImageButton mReset;
private ImageButton mStop;
private String current;
private boolean mIsVideoSizeKnown = false;
private boolean mIsVideoReadyToBePlayed = false;
public File cacheDir;
public Context con;
/**
* Called when the activity is first created.
*/
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
cacheDir = this.getCacheDir();
// Set up the play/pause/reset/stop buttons
mPreview = (SurfaceView) findViewById(R.id.surface);
mPath = (EditText) findViewById(R.id.path);
mPlay = (ImageButton) findViewById(R.id.play);
mPause = (ImageButton) findViewById(R.id.pause);
mReset = (ImageButton) findViewById(R.id.reset);
mStop = (ImageButton) findViewById(R.id.stop);
// mPath.setText("http://cityslicker.user.slicker.tech.googlewave.com.s3.amazonaws.com/video.slicker.tech.googlewave.com.3.21.110.9.23.11.914.mp4");
mPath.setText("http://daily3gp.com/vids/747.3gp");
mPlay.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
playVideo();
}
});
mPause.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
if (mp != null) {
mp.pause();
}
}
});
mReset.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
if (mp != null) {
mp.seekTo(0);
}
}
});
mStop.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
if (mp != null) {
mp.stop();
mp.release();
}
}
});
// Set the transparency
getWindow().setFormat(PixelFormat.TRANSPARENT);
// Set a size for the video screen
holder = mPreview.getHolder();
holder.addCallback(this);
// holder.setFixedSize(400, 300);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
// playVideo();
}
private void playVideo() {
try {
final String path = mPath.getText().toString();
Log.v(TAG, "path: " + path);
// If the path has not changed, just start the media player
if (path.equals(current) && mp != null) {
mp.start();
return;
}
current = path;
// Create a new media player and set the listeners
mp = new MediaPlayer();
// setDataSource(path);
// File file = new File(setDataSource(path));
// FileInputStream fis = new FileInputStream(file);
// chk for file is exists or not
if (false) {
File file = new File(this.getCacheDir(),
"mediaplayertmp28220.3gp");
FileInputStream fis = new FileInputStream(file);
// String audioFilePath = getFilesDir().getAbsolutePath() +
// File.separator + "test.mp4";
mp.setDataSource(fis.getFD());
// Set the surface for the video output
mp.setDisplay(holder);
mp.prepareAsync();
} else {
/*
* Runnable r = new Runnable() { public void run() { try {
*
* // setDataSource(path);
*
* } catch (IOException e) { Log.e(TAG, e.getMessage(), e); }
* Log.v(TAG, "Duration: ===>"); //mp.start();
*
* } }; new Thread(r).start();
*/
}
// mp.prepare();
mp.setDataSource(path);
mp.prepare();
mp.setDisplay(holder);
mp.setOnErrorListener(this);
mp.setOnBufferingUpdateListener(this);
mp.setOnCompletionListener(this);
mp.setOnPreparedListener(this);
// holder.setFixedSize(200, 200);
mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
// mp.start();
// mp.setAudioStreamType(2);
/*
* mMediaPlayer.setDisplay(holder); mMediaPlayer.prepare();
* mMediaPlayer.setOnBufferingUpdateListener(this);
* mMediaPlayer.setOnCompletionListener(this);
* mMediaPlayer.setOnPreparedListener(this);
* mMediaPlayer.setOnVideoSizeChangedListener(this);
* mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
*/
// Set the data source in another thread
// which actually downloads the mp3 or videos
// to a temporary location
} catch (Exception e) {
Log.e(TAG, "error: " + e.getMessage(), e);
if (mp != null) {
mp.stop();
mp.release();
}
}
}
/**
* If the user has specified a local url, then we download the url stream to
* a temporary location and then call the setDataSource for that local file
*
* @param path
* @throws IOException
*/
private void setDataSource(String path) throws IOException {
String tempPath = null;
FileInputStream fis;
InputStream stream;
{
URL url = new URL(path);
URLConnection cn = url.openConnection();
cn.connect();
stream = cn.getInputStream();
if (stream == null)
throw new RuntimeException("stream is null");
File temp = File.createTempFile("mediaplayertmp", ".mp4",
this.getCacheDir());
tempPath = temp.getAbsolutePath();
fis = new FileInputStream(temp);
FileOutputStream out = new FileOutputStream(temp);
byte buf[] = new byte[1024];
do {
int numread = stream.read(buf);
if (numread <= 0)
break;
out.write(buf, 0, numread);
} while (true);
}
mp.setDataSource(fis.getFD());
mp.setDisplay(holder);
mp.prepareAsync();
try {
stream.close();
} catch (IOException ex) {
Log.e(TAG, "error: " + ex.getMessage(), ex);
}
}
public boolean onError(MediaPlayer mediaPlayer, int what, int extra) {
Log.e(TAG, "onError---> what:" + what + " extra:" + extra);
if (mediaPlayer != null) {
mediaPlayer.stop();
mediaPlayer.release();
return true;
}
return false;
}
public void onBufferingUpdate(MediaPlayer arg0, int percent) {
Log.d(TAG, "onBufferingUpdate called ---> percent:" + percent
+ " pos:" + arg0.getCurrentPosition());
}
public void onCompletion(MediaPlayer arg0) {
Log.d(TAG, "onCompletion called");
mp.stop();
mp.release();
}
public void onPrepared(MediaPlayer mediaplayer) {
Log.d(TAG, "onPrepared called");
mIsVideoReadyToBePlayed = true;
mIsVideoSizeKnown = true;
if (mIsVideoReadyToBePlayed && mIsVideoSizeKnown) {
startVideoPlayback();
}
}
private void startVideoPlayback() {
Log.v(TAG, "startVideoPlayback");
holder.setFixedSize(200, 200);
mp.start();
}
public void surfaceCreated(SurfaceHolder surfaceholder) {
Log.d(TAG, "surfaceCreated called");
}
public void surfaceChanged(SurfaceHolder surfaceholder, int i, int j, int k) {
Log.d(TAG, "surfaceChanged called");
}
public void surfaceDestroyed(SurfaceHolder surfaceholder) {
Log.d(TAG, "surfaceDestroyed called");
}
}
我logcat的有 -
所有的08-22 11:26:42.566: DEBUG/AndroidRuntime(487): >>>>>>>>>>>>>> AndroidRuntime START /data/dalvik-cache/[email protected]@[email protected] 08-22 11:26:45.326: DEBUG/PackageManager(58): New package installed in /data/app/org.apache.android.media-2.apk 08-22 11:26:45.507: INFO/ActivityManager(58): Force stopping package org.apache.android.media uid=10048 08-22 11:26:45.656: DEBUG/dalvikvm(58): GC_EXPLICIT freed 7280 objects/478776 bytes in 135ms 08-22 11:26:45.856: WARN/RecognitionManagerService(58): no available voice recognition services found 08-22 11:26:46.236: DEBUG/dalvikvm(58): GC_EXPLICIT freed 4010 objects/223072 bytes in 155ms 08-22 11:26:46.286: INFO/installd(34): unlink /data/dalvik-cache/[email protected]@[email protected] 08-22 11:26:46.297: DEBUG/AndroidRuntime(487): Shutting down VM 08-22 11:26:46.307: DEBUG/dalvikvm(487): Debugger has detached; object registry had 1 entries 08-22 11:26:46.336: INFO/AndroidRuntime(487): NOTE: attach of thread 'Binder Thread #3' failed 08-22 11:26:47.426: DEBUG/AndroidRuntime(500): >>>>>>>>>>>>>> AndroidRuntime START prepare() 08-22 11:27:12.644: INFO/Prefetcher(33): [0x14090] cache below low water mark, filling cache. 08-22 11:27:13.996: INFO/AwesomePlayer(33): prefetcher is done preparing 08-22 11:27:14.006: VERBOSE/MediaPlayerDemo(506): onVideoSizeChanged called 08-22 11:27:14.016: DEBUG/MediaPlayerDemo(506): onPrepared called 08-22 11:27:14.016: VERBOSE/MediaPlayerDemo(506): startVideoPlayback 08-22 11:27:14.036: DEBUG/AudioSink(33): bufferCount (4) is too small and increased to 12 08-22 11:27:14.066: ERROR/MemoryHeapBase(33): error opening /dev/pmem_adsp: No such file or directory 08-22 11:27:14.066: INFO/SoftwareRenderer(33): Creating physical memory heap failed, reverting to regular heap. 08-22 11:27:14.347: WARN/AudioFlinger(33): write blocked for 108 msecs, 1461 delayed writes, thread 0xb3f0 08-22 11:27:15.126: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:7 08-22 11:27:16.066: DEBUG/dalvikvm(291): GC_EXPLICIT freed 30 objects/1472 bytes in 797ms 08-22 11:27:16.226: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:34 08-22 11:27:17.326: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:34 08-22 11:27:18.386: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:32 08-22 11:27:18.477: DEBUG/SntpClient(58): request time failed: java.net.SocketException: Address family not supported by protocol 08-22 11:27:19.362: WARN/AudioFlinger(33): write blocked for 74 msecs, 1497 delayed writes, thread 0xb3f0 08-22 11:27:19.426: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:30 08-22 11:27:20.346: DEBUG/dalvikvm(373): GC_EXPLICIT freed 409 objects/23448 bytes in 108ms 08-22 11:27:20.486: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:30 08-22 11:27:21.586: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:29 08-22 11:27:22.607: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:33 08-22 11:27:23.747: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:34 08-22 11:27:24.427: WARN/AudioFlinger(33): write blocked for 87 msecs, 1537 delayed writes, thread 0xb3f0 08-22 11:27:24.817: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:34 08-22 11:27:25.856: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:39 08-22 11:27:26.907: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:40 08-22 11:27:27.996: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:41 08-22 11:27:29.107: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:41 08-22 11:27:29.437: WARN/AudioFlinger(33): write blocked for 95 msecs, 1577 delayed writes, thread 0xb3f0 08-22 11:27:30.217: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:42 08-22 11:27:31.288: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:44 08-22 11:27:32.416: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:45 08-22 11:27:33.466: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:45 08-22 11:27:34.536: WARN/AudioFlinger(33): write blocked for 98 msecs, 1619 delayed writes, thread 0xb3f0 08-22 11:27:34.587: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:46 08-22 11:27:35.676: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:48 08-22 11:27:36.796: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:50 08-22 11:27:37.866: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:51 08-22 11:27:38.976: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:52 08-22 11:27:39.556: WARN/AudioFlinger(33): write blocked for 81 msecs, 1660 delayed writes, thread 0xb3f0 08-22 11:27:40.076: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:53 08-22 11:27:41.196: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:52 08-22 11:27:42.326: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:50 08-22 11:27:43.406: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:48 08-22 11:27:44.427: DEBUG/MediaPlayerDemo(506): onBufferingUpdate percent:46 08-22 11:27:44.636: WARN/AudioFlinger(33): write blocked for 86 msecs, 1700 delayed writes, thread 0xb3f0 08-22 11:27:44.926: DEBUG/MediaPlayerDemo(506): onCompletion called 08-22 11:27:44.946: WARN/TimedEventQueue(33): Event 627 was not found in the queue, already cancelled?
這是模擬器還是實際手機？ – Kev
我已經在仿真器和手機上測試過它。 –
這條線在你的logcat中：'08-20 15：32：23.122：DEBUG/MediaPlayerDemo（447）：onBufferingUpdate percent：37'它只是在那裏堅持下去，如果是這樣的話多久？ – Kev