自定义圆自定义文字随机数点击改变

package com.bw.u.liangweihang20170213;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Toast;
import java.util.Random;
import static android.R.attr.width;
import static com.bw.u.liangweihang20170213.R.id.text;

public class MyView extends View{
    private int x=202;
    private int y=317;
    private  int radio=40;
    private Paint mPaint;
    private Paint ZPaint;
    private String suijishu;
    private String textContent;
    private int textColor;
    private android.graphics.Canvas canvas;
    private float height;
    private Random ran;
    private float width;


    public MyView(Context context) {
        this(context,null);

    }
    public MyView(Context context, AttributeSet attrs) {
        this(context, attrs,R.style.AppTheme);
    }
    public MyView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        getConfig(context,attrs);
    }

    private void getConfig(Context context, AttributeSet attrs) {
        //得到数组
        TypedArray ta = getContext().obtainStyledAttributes(attrs,
                R.styleable.MyView);
        //给颜色设置默认值
        textColor = ta.getColor(R.styleable.MyView_textColor, Color.YELLOW);
        //回收容器
        ta.recycle();

    }
    //绘制圆的方法
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        //绘制画笔
        ran = new Random();
        mPaint = new Paint();
        ZPaint = new Paint();

        ZPaint.setColor(Color.CYAN);
        ZPaint.setStyle(Paint.Style.STROKE);
        //设置属性
        mPaint.setStrokeWidth(30);
        mPaint.setStyle(Paint.Style.STROKE);
        mPaint.setAntiAlias(true);
        mPaint.setColor(textColor);
        //绘制第一个圆
        canvas.drawCircle(x,y,radio,mPaint);
        //设置随机数
        suijishu= String.valueOf(ran.nextInt(8999)+1000);
        width = mPaint.measureText(suijishu);
        //测量字体的位置
        canvas.drawText(String.valueOf(suijishu),(getWidth()- width)/2,getHeight()/2,ZPaint);
    }
    public boolean onTouchEvent(MotionEvent event) {
        switch (event.getAction()){
            case MotionEvent.ACTION_DOWN:
                invalidate();
                break;
        }
        return true;
    }

}
 

//自定义属性

name="MyView">
    name="textContent" format="string" />
    name="textColor" format="color" />
    name="textSize" format="dimension" />