先画俩矩形

RectF rectF = new RectF(0,0,300,300);

canvas.drawRect(rectF,mPaint);

mPaint.setColor(Color.GREEN);

RectF rectF2 = new RectF(400,400,600,600);

canvas.drawRect(rectF2,mPaint);

把他俩重在一起  看看

然后 说是 有讲究

canvas.clipRect(0, 0, 300, 300);

// canvas.clipRect(200, 200, 500, 500, Region.Op.DIFFERENCE);

RectF rectF = new RectF(0,0,300,300);

canvas.drawRect(rectF,mPaint);

mPaint.setColor(Color.GREEN);

RectF rectF2 = new RectF(200,200,500,500);

canvas.drawRect(rectF2,mPaint);

canvas.clipRect(0, 0, 300, 300);

canvas.clipRect(200, 200, 500, 500, Region.Op.DIFFERENCE);

RectF rectF = new RectF(0,0,300,300);

canvas.drawRect(rectF,mPaint);

mPaint.setColor(Color.GREEN);

RectF rectF2 = new RectF(200,200,500,500);

canvas.drawRect(rectF2,mPaint);

第二个

canvas.clipRect(0, 0, 300, 300);

canvas.clipRect(200, 200, 500, 500, Region.Op.INTERSECT);

RectF rectF = new RectF(0,0,300,300);

canvas.drawRect(rectF,mPaint);

mPaint.setColor(Color.GREEN);

RectF rectF2 = new RectF(200,200,500,500);

canvas.drawRect(rectF2,mPaint);

canvas.clipRect(0, 0, 300, 300, Region.Op.DIFFERENCE);

canvas.clipRect(200, 200, 500, 500);

RectF rectF = new RectF(0, 0, 300, 300);

canvas.drawRect(rectF, mPaint);

mPaint.setColor(Color.GREEN);

RectF rectF2 = new RectF(200, 200, 500, 500);

canvas.drawRect(rectF2, mPaint);

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {

canvas.clipPath(path);

} else {

canvas.clipPath(path, Region.Op.XOR);// REPLACE、UNION 等类型

}

canvas.clipRect(200, 200, 500, 500, Region.Op.INTERSECT);

RectF rectF = new RectF(0, 0, 300, 300);

canvas.drawRect(rectF, mPaint);

canvas.clipRect(0, 0, 300, 300, Region.Op.DIFFERENCE);

mPaint.setColor(Color.GREEN);

RectF rectF2 = new RectF(200, 200, 500, 500);

canvas.drawRect(rectF2, mPaint);

标签：200,canvas,自定义,Clip,300,RectF,mPaint,Android,500

来源： https://blog.csdn.net/FlyPig_Vip/article/details/100894973