自定义view，进度圆

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package com.be.test.l1105;import android.content.Context;import android.content.Intent;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Rect;import android.graphics.RectF;import android.util.AttributeSet;import android.view.View;/** * Created by  on 2017/11/5. */public class CircleView extends View {    private  Paint paint;    private   int progress=0;    Context context ;    public CircleView(Context context) {        super(context);    }    public CircleView(Context context, AttributeSet attrs) {        super(context, attrs);        paint=   new Paint();        // 抗锯齿        paint.setAntiAlias(true);        //设置画笔的颜色        paint.setColor(Color.RED);        //设置画笔 填充是空心的        paint.setStyle(Paint.Style.STROKE);    }    public void start(){        new Thread(new Runnable() {            @Override            public void run() {                while (true){                    if(progress >= 360){                        return;                    }                    progress += 10 ;                    //子线程刷新 系统调用onDraw（） 方法                    postInvalidate();                    try {                        Thread.sleep(100);                    } catch (InterruptedException e) {                        e.printStackTrace();                    }                }            }        }).start();    }    public CircleView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);    }    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);//  getWidth（） 获取当前View 的宽度        int x =  getWidth() / 2 ;        int y = getHeight() / 2 ;        int radius =  200 ;        //设置画笔的粗细        paint.setStrokeWidth(30);        //定义一个区域        RectF rectF = new RectF(x-radius,y-radius,x+radius,y+radius);        //画弧        canvas.drawArc(rectF,-90,progress,false,paint);        int text = (int) ((float)progress / 360  * 100 );        float textWidth =  paint.measureText(text+"%");        Rect rextText = new Rect();        paint.getTextBounds(text+"%",0,(text+"%").length(),rextText);        paint.setTextSize(30);        paint.setStrokeWidth(1);        //画文字        canvas.drawText(text+"%",x-textWidth/2,y+rextText.height()/2,paint);           }}
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