Android自定义view三圆环

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package com.bwie.test.liumengxin1508a2017928;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.util.AttributeSet;import android.widget.TextView;/** * Created by dell on 2017/9/28. */public class MyCustomView extends TextView {    private final  Paint paint;    private final Context context;    public MyCustomView(Context context, Paint paint, Context context1) {        super(context);        this.paint = paint;        this.context = context1;    }    public MyCustomView(Context context, AttributeSet attrs) {        super(context, attrs);        this.context = context;        this.paint = new Paint();        this.paint.setAntiAlias(true); //消除锯齿        this.paint.setStyle(Paint.Style.STROKE); //绘制空心圆    }    public MyCustomView(Context context, AttributeSet attrs, int defStyleAttr, Paint paint, Context context1) {        super(context, attrs, defStyleAttr);        this.paint = paint;        this.context = context1;    }    public MyCustomView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes, Paint paint, Context context1) {        super(context, attrs, defStyleAttr, defStyleRes);        this.paint = paint;        this.context = context1;    }    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);       Paint p1=new Paint();        Paint p2=new Paint();        Paint p3=new Paint();        int wi=getWidth()/2;        int he=getHeight()/2;        p1.setStyle(Paint.Style.STROKE);        p2.setStyle(Paint.Style.STROKE);        p3.setStyle(Paint.Style.STROKE);        p1.setStrokeWidth(5);        p2.setStrokeWidth(5);        p3.setStrokeWidth(5);        p1.setColor(Color.RED);        p2.setColor(Color.YELLOW);        p3.setColor(Color.BLUE);        canvas.drawCircle(wi-150,he-150,130,p1);        canvas.drawCircle(wi-30,he-30,100,p2);        canvas.drawCircle(wi+50,he+50,70,p3);    }    /**     * 根据手机的分辨率从 dp 的单位 转成为 px(像素)     */    public static int dip2px(Context context, float dpValue) {        final float scale = context.getResources().getDisplayMetrics().density;        return (int) (dpValue * scale + 0.5f);    }}效果
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