scaleVideo

软解

播放器类KSYMediaPlayer提供接口 setVideoScalingMode，可以设置视频伸缩模式

KSYMediaPlayer player = KSYMediaPlayer.Builder(mContext).build();

// 填充模式
player.setVideoScalingMode(KSYMediaPlayer.VIDEO_SCALING_MODE_SCALE_TO_FIT);
// 裁剪模式
player.setVideoScalingMode(KSYMediaPlayer.VIDEO_SCALING_MODE_SCALE_TO_FIT_WITH_CROPPING);

调用时机：

1. onPrepared回调时
2. 屏幕旋转时

硬解

VideoSurfaceView的实现

VideoSurfaceView集成了SurfaceView，使用硬解时可在布局中使用VideoSurfaceView，下面为VideoSurfaceView的实现

import android.content.Context;
import android.util.AttributeSet;
import android.view.SurfaceView;
import android.view.View;

/**
 * Created by xbc on 16/3/2.
 * @author [email protected]
 */
public class VideoSurfaceView extends SurfaceView {

    private int mVideoWidth;
    private int mVideoHeight;

    private int mMeasuredWidth;
    private int mMeasuredHeight;

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

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

    public VideoSurfaceView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        doMeasure(widthMeasureSpec, heightMeasureSpec);
        setMeasuredDimension(mMeasuredWidth, mMeasuredHeight);
    }

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

    private void doMeasure(int widthMeasureSpec, int heightMeasureSpec)
    {
        int width = View.getDefaultSize(mVideoWidth, widthMeasureSpec);
        int height = View.getDefaultSize(mVideoHeight, heightMeasureSpec);

        if(mVideoWidth > 0 && mVideoHeight > 0)
        {
            int widthSpecSize = View.MeasureSpec.getSize(widthMeasureSpec);
            int heightSpecSize = View.MeasureSpec.getSize(heightMeasureSpec);
            float specAspectRatio = (float) widthSpecSize / (float) heightSpecSize;
            float displayAspectRatio = (float) mVideoWidth / (float) mVideoHeight;
            boolean shouldBeWider = displayAspectRatio > specAspectRatio;

            if (shouldBeWider) {
                // not high enough, fix height
                height = heightSpecSize;
                width = (int) (height * displayAspectRatio);
            } else {
                // not wide enough, fix width
                width = widthSpecSize;
                height = (int) (width / displayAspectRatio);
            }
        }

        mMeasuredWidth = width;
        mMeasuredHeight = height;
    }
}

使用方法

播放器的部分布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/player_black">

    <VideoSurfaceView
        android:id="@+id/player_surface"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_centerInParent="true"/>

</RelativeLayout>

播放器的部分代码

private VideoSurfaceView mVideoSurfaceView;
mVideoSurfaceView = (VideoSurfaceView) findViewById(R.id.player_surface);

private IMediaPlayer.OnPreparedListener mOnPreparedListener = new IMediaPlayer.OnPreparedListener() {
        @Override
        public void onPrepared(IMediaPlayer mp) {
            if (ksyMediaPlayer != null) {
                if(mVideoSurfaceView != null)
                {
                    mVideoSurfaceView.setVideoDimension(ksyMediaPlayer.getVideoWidth(), ksyMediaPlayer.getVideoHeight());
                    mVideoSurfaceView.requestLayout();
                }

                ksyMediaPlayer.start();
            }
}