android 自定义view实现类似圆盘抽奖的效果

今天没事本来在学习动画,突然想到了鸿洋大神的抽奖的效果,于是就自己写了个,但是没他的全面,现在把我写的先看下效果：

这其中哪些文字是关键,如果你想到是通过canvas的drawText()函数绘制上去就要类似你了,而且这些椭圆也许不是一个定值,所以这个方法最好别用,哪到底用了什么方法把这些文字绘制上去的呢?请看代码

package com.load.anim;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Rect;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.LinearInterpolator;
import android.view.animation.RotateAnimation;
/**
 * Created by admin on 2016/11/2.
 */
public class DiscView extends View implements View.OnClickListener {
    private RotateAnimation rotateAnimation;
    private Paint mPaint;
    private Paint strPaint;
    private int mWidth;
    private int mPadding;
    private boolean isStart = false;
    private RectF rectF;
    private String str="start";
    private String[] contents = new String[]{"美 女","女 神","热 舞","丰 满","性 感","知 性"};
    public DiscView(Context context) {
        this(context,null);
    }

    public DiscView(Context context, AttributeSet attrs) {
        this(context, attrs,0);
    }

    public DiscView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        initPaint();
        initAnim();
        setOnClickListener(this);
    }
    private void initAnim() {
        //以view的中心点为旋转参考点
        rotateAnimation = new RotateAnimation(0f, 360f, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
        rotateAnimation.setRepeatCount(-1);
        rotateAnimation.setFillAfter(true);
    }

    private void initPaint() {
        strPaint = new Paint();
        strPaint.setStyle(Paint.Style.STROKE);
        strPaint.setAntiAlias(true);
        strPaint.setColor(Color.WHITE);
        strPaint.setStrokeWidth(5);

        mPaint = new Paint();
        mPaint.setStyle(Paint.Style.STROKE);
        mPaint.setAntiAlias(true);
        mPaint.setColor(Color.WHITE);
        mPaint.setStrokeWidth(3);
    }
    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        setMeasuredDimension(300,300);
        mWidth = getMeasuredWidth();
        mPadding = 5;
        initRect();
    }

    private void initRect() {
        rectF = new RectF(0,0,mWidth,mWidth);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        //绘制圆
        mPaint.setStyle(Paint.Style.STROKE);
        canvas.drawCircle(mWidth/2,mWidth/2,mWidth/2-mPadding,mPaint);
        //绘制 6个椭圆
        mPaint.setStyle(Paint.Style.FILL);

        initArc(canvas);

        //绘制里面的小圆
        mPaint.setColor(Color.RED);
        mPaint.setStyle(Paint.Style.FILL);
        canvas.drawCircle(mWidth/2,mWidth/2,50,mPaint);


        mPaint.setColor(Color.WHITE);
        mPaint.setTextSize(24);
        Rect rect = new Rect();
        mPaint.getTextBounds(str, 0, str.length(), rect);
        int strWidth = rect.width();//文本的宽度
        int textHeight = rect.height();//文本的高度
        canvas.drawText(str,mWidth/2-25+25-strWidth/2,mWidth/2+textHeight/2,mPaint);


    }
    /**
     * 绘制6个弧 和对应的文字
     */
    private void initArc(Canvas canvas) {
        for(int i=0;i<6;i++){
            mPaint.setColor(colors[i]);
            canvas.drawArc(rectF,(i-1)*60+60,60,true,mPaint);
        }
        for(int i=0;i<6;i++){
            mPaint.setColor(Color.BLACK);
            Path path = new Path();
            path.addArc(rectF,(i-1)*60+60,60);
            canvas.drawTextOnPath(contents[i],path,60,60,mPaint);
        }
    }
    public  int[] colors = new int[]{Color.parseColor("#8EE5EE"),Color.parseColor("#FFD700"),Color.parseColor("#FFD39B"),Color.parseColor("#FF8247"),Color.parseColor("#FF34B3"),Color.parseColor("#F0E68C")};
    @Override
    public void onClick(View view) {
        if(!isStart){
            isStart = true;
            rotateAnimation.setDuration(1000);
            rotateAnimation.setInterpolator(new LinearInterpolator());//不停顿
            startAnimation(rotateAnimation);
        }else{
            isStart = false;
            stopAnim();
        }
    }
    /**
     * 停止动画
     */
    public void stopAnim() {
        clearAnimation();
    }
}

效果：

ok,基本效果已出来!