自定义画圆

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package aaaaa.diy.View;import android.content.Context;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 fuck on 2017/11/5. */public class huaQuan extends View{    private Paint paint;    private boolean runing = true ;    private int progress = 0 ;    Context context;    public huaQuan(Context context) {        super(context);    }    public huaQuan(Context context, AttributeSet attrs) {        this(context, attrs,0);    }    public huaQuan(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        //创建一个画笔        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        new Thread(new Runnable() {            @Override            public void run() {                while (runing){                    if(progress >= 360){                        runing = false;                        return;                    }                    System.out.println("progress = " + progress);                    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();    }    float sweep ;    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);        int x = getWidth() / 2;        int y = getHeight() / 2;        int radius = 100;        paint.setStrokeWidth(20);        RectF rectF = new RectF(x - radius, y - radius, x + radius, y + radius);        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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