Android : How to stretch video to use whole area of VideoView (code snippets)

layout.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
 
    <pakage.path.ScalableVideoView 
         android:id="@+id/scalableVideoView"
         android:layout_alignParentTop="true"
         android:layout_alignParentBottom="true"
         android:layout_alignParentLeft="true"
         android:layout_alignParentRight="true"
         android:layout_width="fill_parent"
         android:layout_height="fill_parent" />
    
</RelativeLayout>

links

http://clseto.mysinablog.com/index.php?op=ViewArticle&articleId=2992625
https://code.google.com/p/googletv-android-samples/source/browse/aspect-ratio-video-library/src/com/google/android/tv/library/aspectratio/video/AspectRatioVideoView.java

ScalableVideoView.java

import android.content.Context;
import android.util.AttributeSet;
import android.widget.VideoView;

public class ScalableVideoView extends VideoView {

    private int mVideoWidth;
    private int mVideoHeight;
    private DisplayMode displayMode = DisplayMode.ORIGINAL;

    public enum DisplayMode {
        ORIGINAL,       // original aspect ratio
        FULL_SCREEN,    // fit to screen
        ZOOM            // zoom in
    };

    public ScalableVideoView(Context context) {
        super(context);
    }

    public ScalableVideoView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public ScalableVideoView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        mVideoWidth = 0;
        mVideoHeight = 0;
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int width = getDefaultSize(0, widthMeasureSpec);
        int height = getDefaultSize(mVideoHeight, heightMeasureSpec);

        if (displayMode == DisplayMode.ORIGINAL) {
            if (mVideoWidth > 0 && mVideoHeight > 0) {
                if ( mVideoWidth * height  > width * mVideoHeight ) {
                    // video height exceeds screen, shrink it
                    height = width * mVideoHeight / mVideoWidth;
                } else if ( mVideoWidth * height  < width * mVideoHeight ) {
                    // video width exceeds screen, shrink it
                    width = height * mVideoWidth / mVideoHeight;
                } else {
                    // aspect ratio is correct
                }
            }
        }
        else if (displayMode == DisplayMode.FULL_SCREEN) {
            // just use the default screen width and screen height
        }
        else if (displayMode == DisplayMode.ZOOM) {
            // zoom video
            if (mVideoWidth > 0 && mVideoHeight > 0 && mVideoWidth < width) {
                height = mVideoHeight * width / mVideoWidth;
            }
        }

        setMeasuredDimension(width, height);
    }

    public void changeVideoSize(int width, int height)
    {
        mVideoWidth = width;
        mVideoHeight = height;

        // not sure whether it is useful or not but safe to do so
        getHolder().setFixedSize(width, height);

        requestLayout();
        invalidate();     // very important, so that onMeasure will be triggered
    }

    public void setDisplayMode(DisplayMode mode) {
        displayMode = mode;
    }
}