我的应用程序仅提供纵向模式。在纵向活动中，我有一个全屏 VideoView。我想要做的是在横向模式下将 VideoView（实际视频、视频缓冲区）旋转 90 度。使活动处于 Lanscape 模式不是一种选择。 扩展 VideoView 和画布旋转将不起作用，因为它是 SurfaceView 而不是实际视图。 有没有办法通过 videoView 实现这一点？
【问题讨论】：
标签： android surfaceview android-videoview
即使合成矩阵设置正确并使用了旋转属性，VideoView也不支持视频旋转。
你可以做的是使用TextureView并设置它的属性rotation="90"（例如）。然后它会旋转帧，但纵横比是你需要自己处理的。为此，您可以使用 textureView.setScaleX((screenHeight * 1.0f) / screenWidth)
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextureView
android:id="@+id/playback_video"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerInParent="true"
android:rotation="90" />
</RelativeLayout>
它也应该处理流式视频。但请把它当作一个例子，而不是发布现成的代码。我重命名了一些内容并删除了其他内容，它们与问题无关，这可能会破坏某些内容，但总的来说这是一个可行的例子。
public class PlaybackActivity extends Activity implements MediaPlayer.OnErrorListener, OnPreparedListener,
OnCompletionListener, OnVideoSizeChangedListener, OnBufferingUpdateListener, OnInfoListener,
SurfaceTextureListener
{
private MediaPlayer mediaPlayer;
private TextureView videoView;
private boolean startedPlayback = false;
private boolean playerReady = false;
public static final int MEDIA_INFO_NETWORK_BANDWIDTH = 703;
private void createMediaPlayer() {
mediaPlayer = new MediaPlayer();
}
private void releaseMediaPlayer() {
if (mediaPlayer != null) {
mediaPlayer.setSurface(null);
mediaPlayer.release();
mediaPlayer = null;
}
}
public void onCompletion(MediaPlayer mp) {
Log.w(TAG, "Video playback finished");
}
@Override
public boolean onError(MediaPlayer player, int what, int extra) {
if (what == MediaPlayer.MEDIA_ERROR_UNKNOWN) {
/*
* Restart play back in case we did not start anything yet. This may
* be the case when we tried to tune in in very first secs of the
* broadcast when there is no data yet.
*/
if (liveBroadcast && mediaPlayer != null && !mediaPlayer.isPlaying() && !startedPlayback) {
if (checkCount-- > 0) {
mediaPlayer.reset();
checkBroadcast();
} else {
Log.w(TAG, "Broadcast finished");
}
} else {
Log.w(TAG, "No media in stream");
}
} else if (what == MediaPlayer.MEDIA_ERROR_SERVER_DIED) {
Log.w(TAG, "Media service died unexpectedly");
} else {
Log.w(TAG, "Unknown media error");
}
return true;
}
@Override
public boolean onInfo(MediaPlayer mp, int what, int extra) {
switch (what) {
case MediaPlayer.MEDIA_INFO_VIDEO_TRACK_LAGGING:
Log.w(TAG, "Media is too complex to decode it fast enough.");
startedPlayback = true;
break;
case MEDIA_INFO_NETWORK_BANDWIDTH:
Log.w(TAG, "Bandwith in recent past.");
break;
case MediaPlayer.MEDIA_INFO_BUFFERING_START:
Log.w(TAG, "Start of media bufferring.");
startedPlayback = true;
break;
case MediaPlayer.MEDIA_INFO_BUFFERING_END:
Log.w(TAG, "End of media bufferring.");
startedPlayback = true;
break;
case MediaPlayer.MEDIA_INFO_BAD_INTERLEAVING:
Log.w(TAG, "Media is not properly interleaved.");
break;
case MediaPlayer.MEDIA_INFO_NOT_SEEKABLE:
Log.w(TAG, "Stream is not seekable.");
break;
case MediaPlayer.MEDIA_INFO_METADATA_UPDATE:
Log.w(TAG, "New set of metadata is available.");
break;
case MediaPlayer.MEDIA_INFO_UNKNOWN:
default:
Log.w(TAG, "Unknown playback info (" + what + ":" + extra + ").");
break;
}
return true;
}
private void startPlayback() {
if (mediaPlayer != null) {
onLoaded(mediaPlayer);
mediaPlayer.start();
}
}
private void pausePlayback() {
if (mediaPlayer != null && mediaPlayer.isPlaying())
mediaPlayer.pause();
}
private void resumePlayback() {
if (mediaPlayer != null && mediaPlayer.isPlaying())
mediaPlayer.start();
}
private void onLoaded(MediaPlayer mp) {
}
public void onPrepared(MediaPlayer mp) {
playerReady = true;
startPlayback();
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
setContentView(R.layout.playback);
videoView = (TextureView) findViewById(R.id.playback_video);
videoView.setOnClickListener(videoViewClickHandler);
videoView.setSurfaceTextureListener(this);
createMediaPlayer();
}
@Override
protected void onDestroy() {
releaseMediaPlayer();
if (surface != null) {
surface.release();
surface = null;
}
super.onDestroy();
}
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
this.surface = new Surface(surface);
loadMedia(someurl);
}
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
if (this.surface != null) {
releaseMediaPlayer();
this.surface.release();
this.surface = null;
}
return true;
}
@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
}
@Override
public void onSurfaceTextureUpdated(SurfaceTexture surface) {
}
@Override
public void onVideoSizeChanged(MediaPlayer mp, int w, int h) {
if (w > 0 && h > 0 && !videoSizeSetupDone) {
Log.w(TAG, "Video size changed: " + w + "x" + h);
changeVideoSize(w, h);
}
}
private boolean videoSizeSetupDone = false;
private void changeVideoSize(int width, int height) {
DisplayMetrics metrics = new DisplayMetrics();
RelativeLayout.LayoutParams params;
Utils.getScreenMetrics(this, metrics);
VideoOrientation orientation = someVideoSource.getVideoOrientation();
if (orientation == LANDSCAPE) {
params = new RelativeLayout.LayoutParams(metrics.widthPixels, metrics.heightPixels);
} else {
float rotation = orientation == BroadcastVideoOrientation.BroadcastVideoFrontCamera ? -90.0f : 90.0f;
params = new RelativeLayout.LayoutParams(metrics.heightPixels, metrics.widthPixels);
float scale = (width * 1.0f) / (height * 1.0f);
videoView.setRotation(rotation);
videoView.setScaleX(scale);
}
params.addRule(RelativeLayout.CENTER_IN_PARENT, -1);
videoView.setLayoutParams(params);
videoSizeSetupDone = true;
}
private void loadMedia(String url) {
if (surface == null)
return;
Log.d(App.TAG, "Loading url: " + url);
startedPlayback = false;
try {
mediaPlayer.reset();
mediaPlayer.setSurface(surface);
mediaPlayer.setDataSource(url);
mediaPlayer.setOnPreparedListener(this);
mediaPlayer.setOnCompletionListener(this);
mediaPlayer.setOnErrorListener(this);
mediaPlayer.setOnVideoSizeChangedListener(this);
mediaPlayer.setScreenOnWhilePlaying(true);
mediaPlayer.setOnBufferingUpdateListener(this);
mediaPlayer.setOnInfoListener(this);
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.prepareAsync();
} catch (Exception e) {
Log.w(TAG, "Media load failed");
Utils.alert(this, "Playback Error", e.getMessage(), finishHandler);
}
}
}
希望这会有所帮助。我一直在寻找这个解决方案。几乎尝试了所有方法，这似乎是唯一的方法。
【讨论】：
<TextureView
android:id="@+id/VideoViewfull"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:rotation="90"
/>
mMediaPlayer.setOnVideoSizeChangedListener(newMediaPlayer.OnVideoSizeChangedListener() {
@Override
public void onVideoSizeChanged(MediaPlayer mp, int width, int height) {
if (width < height) {
// orientation = "vertical";
mTextureView.setRotation(90f);
} else {
DisplayMetrics displayMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
int sHeight = displayMetrics.heightPixels;
int sntWidth = displayMetrics.widthPixels;
FrameLayout.LayoutParams parms =
new FrameLayout.LayoutParams(sHeight,sHeight);
mTextureView.setLayoutParams(parms);
}
}
});
【讨论】：
VideoView 不支持旋转
你可以使用
<com.warnyul.android.widget.FastVideoView
android:rotation="45"
android:layout_above="@+id/controller"
android:id="@+id/video2"
android:foregroundGravity="center"
android:layout_centerHorizontal="true"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
并且必须在 gradle 中的依赖项中添加以下行
implementation 'com.warnyul.android.fast-video-view:fast-video-view:1.0.2'
【讨论】：
您可以在清单中单独设置活动的方向，以便您的视频可以横向（和纵向）显示，而应用程序的其余部分则为纵向。请参阅我的回答 here 以获取解决方案。
【讨论】：