Android(安卓)Canvas 裁剪 Region.Op.REPLACE

实现类似效果：

主要功能代码：

package myapplication.lum.com.bird;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Path;import android.graphics.Region;import android.support.annotation.Nullable;import android.util.AttributeSet;import android.view.View;public class MyView extends View {    private  Paint mPaint;    public MyView(Context context) {        super(context);        init();    }    public MyView(Context context, @Nullable AttributeSet attrs) {        super(context, attrs);        init();    }    public MyView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        init();    }    @Override    protected void onDraw(Canvas canvas) {        canvas.translate(10, 10);        canvas.save();        canvas.translate(560, 0);        mPaint.setColor(Color.RED);        canvas.drawCircle(200,200,100,mPaint);        Path pathOne = new Path();        pathOne.addCircle(200,200,100,Path.Direction.CW);        canvas.clipPath(pathOne);        mPaint.setColor(Color.BLUE);        canvas.drawCircle(300,200,100,mPaint);        Path pathtwo = new Path();        pathtwo.addCircle(300,200,100,Path.Direction.CW);        canvas.clipPath(pathtwo,Region.Op.REPLACE);        drawScene(canvas);        canvas.restore();    }    private void drawScene(Canvas canvas){        canvas.drawRect(0, 0, getRight(), getBottom(), mPaint);    }    private void init() {        mPaint = new Paint();        mPaint.setAntiAlias(true);        mPaint.setStyle(Paint.Style.STROKE);        mPaint.setStrokeWidth(10);        mPaint.setColor(Color.YELLOW);    }}

文章参考：
Canvas API详解(Part 2)剪切方法合集

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