TextureView默认以fitxy的方式加载surface数据，如果需要等比全屏播放视频，避免拉伸，可以采用Matrix对TextureView进行变换

废话不多说，直接上代码

public class BaseIjkPlayer implements TextureView.SurfaceTextureListener{//视频缩放，调整比例private void resolveStretching(float textureViewWidth,float textureViewHeight){if(textureView==null){return;}if(ijkMediaPlayer==null){return;}try {float videoWidth = ijkMediaPlayer.getVideoWidth(); //宽float videoHeight = ijkMediaPlayer.getVideoHeight(); //高if(textureViewWidth==0||textureViewHeight==0||videoWidth==0||videoHeight==0){return;}Matrix matrix = getMatrix(textureViewWidth, textureViewHeight, videoWidth, videoHeight);textureView.setTransform(matrix);textureView.postInvalidate();}catch (Exception e){Log.d(TAG, "resolveStretching: error"+e);}}//获取Matrix    private @NonNull Matrix getMatrix(float textureViewWidth,float textureViewHeight,float videoWidth,float videoHeight) {float sx = textureViewWidth / videoWidth;float sy = textureViewHeight/ videoHeight;Matrix matrix = new Matrix();//第1步:把视频区移动到View区,使两者中心点重合.matrix.preTranslate((textureViewWidth - videoWidth) / 2, (textureViewHeight - videoHeight) / 2);//第2步:因为默认视频是fitXY的形式显示的,所以首先要缩放还原回来.matrix.preScale(videoWidth / textureViewWidth, videoHeight / textureViewHeight);//第3步,等比例放大或缩小,直到视频区的一边和View一边相等.如果另一边和view的一边不相等，则留下空隙if (sx >= sy){matrix.postScale(sy, sy, textureViewWidth / 2, textureViewHeight / 2);}else{matrix.postScale(sx, sx, textureViewWidth / 2, textureViewHeight / 2);}return matrix;}
}

在onSurfaceTextureAvailable才能拿到textureViewWidth和textureViewHeight的真实长度

public class BaseIjkPlayer implements TextureView.SurfaceTextureListener{@Overridepublic void onSurfaceTextureAvailable(@NonNull SurfaceTexture sur, int width, int height) {this.surface = new Surface(sur);ijkMediaPlayer.setSurface(surface);resolveStretching(width,height);}//省略其他的SurfaceTextureListener的实现...
}

别忘了添加监听

public class BaseIjkPlayer implements TextureView.SurfaceTextureListener{public IjkMediaPlayer ijkMediaPlayer;//初始化private void init() {ijkMediaPlayer = new IjkMediaPlayer();//...省略一些配置textureView.setSurfaceTextureListener(this);}
}