要实现安卓四边切割角的效果，可以通过自定义一个 View，并在其 onDraw 方法中绘制四个带有圆角的矩形。

以下是一个示例代码：

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;

public class RoundedCornersView extends View {
    private Paint paint;
    private Path path;
    private RectF rectF;
    
    private int cornerRadius = 50; // 圆角半径
    
    public RoundedCornersView(Context context) {
        super(context);
        init();
    }

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

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

    private void init() {
        paint = new Paint();
        paint.setColor(Color.WHITE);
        paint.setAntiAlias(true);
        
        path = new Path();
        rectF = new RectF();
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        
        int width = getWidth();
        int height = getHeight();
        
        // 绘制四个带有圆角的矩形
        rectF.set(0, 0, width, height);
        path.reset();
        path.addRoundRect(rectF, cornerRadius, cornerRadius, Path.Direction.CW);
        canvas.drawPath(path, paint);
        
        rectF.set(cornerRadius, cornerRadius, width - cornerRadius, height - cornerRadius);
        path.reset();
        path.addRect(rectF, Path.Direction.CW);
        canvas.drawPath(path, paint);
        
        rectF.set(0, cornerRadius, cornerRadius, height - cornerRadius);
        path.reset();
        path.addRect(rectF, Path.Direction.CW);
        canvas.drawPath(path, paint);
        
        rectF.set(width - cornerRadius, cornerRadius, width, height - cornerRadius);
        path.reset();
        path.addRect(rectF, Path.Direction.CW);
        canvas.drawPath(path, paint);
    }
}

要在布局文件中使用该自定义 View，可以添加以下代码：

通过调整 cornerRadius 的值，可以控制圆角的大小。