Android VideoView以匹配父级高度并保持纵横比
我有一个视频视图,设置如下:Android VideoView以匹配父级高度并保持纵横比,android,android-videoview,dimensions,aspect-ratio,Android,Android Videoview,Dimensions,Aspect Ratio,我有一个视频视图,设置如下: <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/player" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <VideoVi
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/player"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<VideoView
android:id="@+id/video"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_centerInParent="true"
android:layout_centerVertical="true" />
<ProgressBar
android:id="@+id/loader"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true" />
</RelativeLayout>
MediaController controllers = new MediaController(this) {
@Override
public void hide() {
if (state != State.Hidden) {
this.show();
}
else {
super.hide();
}
}
};
controllers.setAnchorView(videoView);
videoView.setMediaController(controllers);
videoView.setOnPreparedListener(new OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mediaPlayer) {
controllers.show();
}
});
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/video_holder"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:clipToPadding="false">
<VideoView
android:id="@+id/videoView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true" />
</RelativeLayout>
int i = videoView.getHeight() > videoView.getWidth() ? videoView.getHeight() : videoView.getWidth();
video_holder.setLayoutParams(new ConstraintLayout.LayoutParams(i, i));
这非常有效,控制器始终保持打开状态,但在计算视频放置位置时,没有考虑控制器的高度(因为它是垂直居中的)
我的两个问题是:
谢谢。您应该扩展内置视频视图 在显示视频视图之前,请调用
setVideoSize
,您可以从视频中提取的缩略图中获取视频大小
因此,当调用视频视图的onMeasure
时,mvideowith
和mvideowith
都大于0
如果您想计算控制器的高度,您可以在onMeasure
方法中自己计算
希望会有所帮助
public class MyVideoView extends VideoView {
private int mVideoWidth;
private int mVideoHeight;
public MyVideoView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public MyVideoView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public MyVideoView(Context context) {
super(context);
}
public void setVideoSize(int width, int height) {
mVideoWidth = width;
mVideoHeight = height;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// Log.i("@@@", "onMeasure");
int width = getDefaultSize(mVideoWidth, widthMeasureSpec);
int height = getDefaultSize(mVideoHeight, heightMeasureSpec);
if (mVideoWidth > 0 && mVideoHeight > 0) {
if (mVideoWidth * height > width * mVideoHeight) {
// Log.i("@@@", "image too tall, correcting");
height = width * mVideoHeight / mVideoWidth;
} else if (mVideoWidth * height < width * mVideoHeight) {
// Log.i("@@@", "image too wide, correcting");
width = height * mVideoWidth / mVideoHeight;
} else {
// Log.i("@@@", "aspect ratio is correct: " +
// width+"/"+height+"="+
// mVideoWidth+"/"+mVideoHeight);
}
}
// Log.i("@@@", "setting size: " + width + 'x' + height);
setMeasuredDimension(width, height);
}
}
公共类MyVideoView扩展了VideoView{
私有整数宽度;
私人身高;
公共MyVideoView(上下文、属性集属性){
超级(上下文,attrs);
}
公共MyVideoView(上下文、属性集属性、int-defStyle){
超级(上下文、属性、定义样式);
}
公共MyVideoView(上下文){
超级(上下文);
}
公共空间设置VideoSize(整数宽度、整数高度){
mVideoWidth=宽度;
mVideoHeight=高度;
}
@凌驾
测量时的保护空隙(内部宽度测量等级、内部高度测量等级){
//Log.i(“@@@1”,“测量时”);
int-width=getDefaultSize(MVideWidth,widthMeasureSpec);
int height=getDefaultSize(MVideHeight、heightMeasureSpec);
如果(mvideowitch>0&&mvideowitch>0){
如果(MVideWidth*height>width*MVideHeight){
//Log.i(“@@@@1”,“图像太高,正在更正”);
高度=宽度*mVideoHeight/mVideoWidth;
}else if(MVideWidth*height
我用布局解决了这个问题。当它被固定在角落时,它似乎工作得很好,但它导致了视频倾斜。为了进行测试,我将相对布局的背景更改为#990000,以便看到红色的背景
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/relative_parent"
android:background="#000000">
<VideoView
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:focusable="false"
android:focusableInTouchMode="false"
android:id="@+id/videoView" />
</RelativeLayout>
公共类MyVideoView扩展了VideoView{
私有整数宽度;
私人身高;
公共MyVideoView(上下文、属性集属性){
超级(上下文,attrs);
}
公共MyVideoView(上下文、属性集属性、int-defStyle){
超级(上下文、属性、定义样式);
}
公共MyVideoView(上下文){
超级(上下文);
}
@凌驾
公共void setVideoURI(Uri){
MediaMetadataRetriever retriever=新的MediaMetadataRetriever();
retriever.setDataSource(this.getContext(),uri);
mVideoWidth=Integer.parseInt(retriever.extractMetadata(MediaMetadataRetriever.METADATA\u KEY\u VIDEO\u WIDTH));
mVideoHeight=Integer.parseInt(retriever.extractMetadata(MediaMetadataRetriever.METADATA\u KEY\u VIDEO\u HEIGHT));
super.setVideoURI(uri);
}
@凌驾
测量时的保护空隙(内部宽度测量等级、内部高度测量等级){
//Log.i(“@@@1”,“测量时”);
int-width=getDefaultSize(MVideWidth,widthMeasureSpec);
int height=getDefaultSize(MVideHeight、heightMeasureSpec);
如果(mvideowitch>0&&mvideowitch>0){
如果(MVideWidth*height>width*MVideHeight){
//Log.i(“@@@@1”,“图像太高,正在更正”);
高度=宽度*mVideoHeight/mVideoWidth;
}else if(MVideWidth*height
关于问题1,我很惊讶没有人提到可能使用MediaPlayer的缩放模式。
它有两种模式。它们都始终填充视图区域。要使其在保留纵横比的同时填充空间,从而裁剪长边,需要切换到第二种模式,VIDEO\u SCALING\u mode\u SCALE\u To\u FIT\u WITH\u croping
。这解决了问题的一部分。另一部分是改变VideoView的测量行为,正如其他一些答案所示。我就是这样做的,主要是出于懒惰和不熟悉其他人使用的元数据API,欢迎您使用此方法或其他方法之一来修复视图的大小。当在层存在之前调用时,毯子捕获确保了安全性,因为它可能被多次调用,并且如果字段名发生更改,它也会返回到旧行为
class FixedSizeVideoView : VideoView {
constructor(ctx: Context) : super(ctx)
constructor(ctx: Context, attrs: AttributeSet) : super(ctx, attrs)
// rather than shrink down to fit, stay at the size requested by layout params. Let the scaling mode
// of the media player shine through. If the scaling mode on the media player is set to the one
// with cropping, you can make a player similar to AVLayerVideoGravityResizeAspectFill on iOS
override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
try {
val mpField = VideoView::class.java.getDeclaredField("mMediaPlayer")
mpField.isAccessible = true
val mediaPlayer: MediaPlayer = mpField.get(this) as MediaPlayer
val width = View.getDefaultSize(mediaPlayer.videoWidth, widthMeasureSpec)
val height = View.getDefaultSize(mediaPlayer.videoHeight, heightMeasureSpec)
setMeasuredDimension(width, height)
}
catch (ex: Exception) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec)
}
}
}
因此,在布局中使用这个类,只要在有机会的情况下更改媒体播放器上的缩放模式即可。例如:
video.setOnPreparedListener { mp: MediaPlayer ->
mp.setVideoScalingMode(MediaPlayer.VIDEO_SCALING_MODE_SCALE_TO_FIT_WITH_CROPPING)
mp.isLooping = true
mp.setScreenOnWhilePlaying(false)
}
video.start()
我尝试了很多解决方案,而我的视频总是1000*1000格式,所以我为了解自己方面的人创建了一个简单的解决方案
int i = videoView.getHeight() > videoView.getWidth() ? videoView.getHeight() : videoView.getWidth();
video_holder.setLayoutParams(new ConstraintLayout.LayoutParams(i, i));
val max = if (videoView.height > videoView.width) videoView.height else videoView.width
videoView.layoutParams = ConstraintLayout.LayoutParams(max, max)
<VideoView
android:id="@+id/video"
android:layout_width="2000dp"
android:layout_height="match_parent" />
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// getting screen size
((Activity) getContext()).getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
int width = displayMetrics.widthPixels;
int height = displayMetrics.heightPixels;
double videoSizeRatio = (double) mVideoHeight / mVideoWidth;
double screenSizeRatio = (double) height / width;
if (mVideoWidth > 0 && mVideoHeight > 0) {
if (videoSizeRatio > screenSizeRatio) { // screen is wider than video width
height = (int) (videoSizeRatio * width);
} else if (videoSizeRatio < screenSizeRatio) {
width = (int) (height / videoSizeRatio);
}
}
setMeasuredDimension(width, height);
}
<YourCustomizedVideoView
android:id="@+id/videoView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="300dp">
<VideoView
android:id="@+id/videoView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerInParent="true" />
</RelativeLayout>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<VideoView
android:id="@+id/videoView"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintDimensionRatio="3:4"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>