面试题5：椭圆里面有个内切圆，内切圆中有文字

题目来自：《android高薪之路—android程序员面试宝典》一书  ，只是为了个人学习方便

  实现效果如下：

 

 

代码如下：

 

package com.app;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.RectF;
import android.view.View;

public class DrawArcPostTextView extends View{
       public DrawArcPostTextView(Context context) {
             super(context);
      }
       @Override
       protected void onDraw(Canvas canvas) {
             super.onDraw(canvas);
            Paint paint = new Paint();
            paint.setColor(Color. BLUE);
            paint.setStyle(Style. STROKE);
             //paint.setStyle(Style.FILL_AND_STROKE);
             //paint.setStyle(Style.FILL);
            paint.setTextSize(30);
            RectF rectF = new RectF();//四个float型坐标
            rectF. left=100;
            rectF. right=240;
            rectF. bottom=200;
            rectF. top=100;
            canvas.drawArc(rectF, 0, 360, true, paint);//画一个椭圆
             //rectF.left=120;
             //rectF.right=260;
             //rectF.bottom=200;
             //rectF.top=100;
             //canvas.drawOval(rectF, paint); //画一个椭圆
            rectF. left=120;
            rectF. right=220;
            rectF. bottom=200;
            rectF. top=100;
            canvas.drawArc(rectF, 0, 360, true, paint);//画一个圆形
            canvas.drawPosText( "圆形", new float[]{140,140,210,250}, paint);
      }
}