Android SurfaceView播放视频时横竖屏的调整

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对于横屏录制的视频就横屏播放，对于竖屏录制的视频就竖屏播放。

在mainifest文件里对负责播放的Activity添加以下属性“

android:configChanges="orientation|keyboardHidden|screenSize"

重写Acitivity的onConfigurationChanged方法：

@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig); }

根据视频的属性来区分：

@Override
public void onVideoSizeChanged(MediaPlayer mp, int width, int height) {
if (width == || height == ) {
Log.e(TAG, "invalid video width(" + width + ") or height(" + height
+ ")");
return;
}
Logger.d(TAG, "onVideoSizeChanged width:" + width + " height:" + height);
mIsVideoSizeKnown = true;
mVideoHeight = height;
mVideoWidth = width;
int wid = mMediaPlayer.getVideoWidth();
int hig = mMediaPlayer.getVideoHeight();
// 根据视频的属性调整其显示的模式 if (wid > hig) {
if (getRequestedOrientation() != ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE) {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
}
} else {
if (getRequestedOrientation() != ActivityInfo.SCREEN_ORIENTATION_PORTRAIT) {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}
}
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
mSurfaceViewWidth = dm.widthPixels;
mSurfaceViewHeight = dm.heightPixels;
if (width > height) {
// 竖屏录制的视频，调节其上下的空余 int w = mSurfaceViewHeight * width / height;
int margin = (mSurfaceViewWidth - w) / ;
Logger.d(TAG, "margin:" + margin);
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.MATCH_PARENT,
RelativeLayout.LayoutParams.MATCH_PARENT);
lp.setMargins(margin, , margin, );
mSurfaceView.setLayoutParams(lp);
} else {
// 横屏录制的视频，调节其左右的空余 int h = mSurfaceViewWidth * height / width;
int margin = (mSurfaceViewHeight - h) / ;
Logger.d(TAG, "margin:" + margin);
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.MATCH_PARENT,
RelativeLayout.LayoutParams.MATCH_PARENT);
lp.setMargins(, margin, , margin);
mSurfaceView.setLayoutParams(lp);
}
}