package com.loaderman.mywave;

import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.Paint;

import android.util.AttributeSet;

import android.view.View;

/**

 *

 * 绘制简单圆环

 */

public class SimpleRing extends View {

    private Paint paint;

    public SimpleRing(Context context) {

        this(context, null);

    }

    public SimpleRing(Context context, AttributeSet attrs) {

        this(context, attrs, -1);

    }

    public SimpleRing(Context context, AttributeSet attrs, int defStyleAttr) {

        super(context, attrs, defStyleAttr);

        init();

    }

    private void init() {

        paint = new Paint();

        paint.setColor(Color.RED);

        paint.setStyle(Paint.Style.STROKE);//空心

        paint.setStrokeWidth(10);//设置圆环宽度

        paint.setAntiAlias(true);//去掉锯齿

    }

    @Override

    protected void onDraw(Canvas canvas) {

        super.onDraw(canvas);

        //绘制圆环: 参1,2: 圆心坐标; 参3:半径

        canvas.drawCircle(getWidth() / 2, getHeight() / 2, 100, paint);

    }

}