抽奖转盘简易版

CircleView（画外圆的类）

/**
 * 这里是画转盘的
 *  @author hasee
 */
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.View;

public class CircleView extends View {

//画笔
    Paint mPaint;
    int mCircleCount=6;
    int mStartAngle=0;
//字符串
    private String[] mStr = new String[]{"优惠券","十元话费","恭喜发财","恭喜发财","英雄皮肤","50M流量"};
    int[] colors=new int[]{Color.YELLOW,Color.DKGRAY,Color.CYAN,Color.GRAY,Color.GREEN,Color.RED};
    RectF rectF;
    int textdegress=15;


    public CircleView(Context context) {
        super(context);
        brush();
    }

    public CircleView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);

        brush();
    }
//定义画笔
    private void brush() {
    //初始化画笔
        mPaint = new Paint();
        //画笔颜色
        mPaint.setColor(Color.BLUE);
        //画笔宽度
        mPaint.setStrokeWidth(10);
        //字体大小
        mPaint.setTextSize(60);
        //画笔样式
        mPaint.setStyle(Paint.Style.FILL);
	//Rect（尺寸）类
        rectF = new RectF();
        rectF.top = 100;
        rectF.left = 100;
        rectF.right = 600;
        rectF.bottom = 600;
    }
    @Override
//开始画
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
	
        for (int i=0;i<mCircleCount;i++){
            mPaint.setColor(colors[i]);
            Path path=new Path();
            mPaint.setTextSize(24);
            canvas.drawArc(rectF,mStartAngle,60,true,mPaint);
            path.addArc(rectF,textdegress,60);
            mPaint.setColor(Color.BLACK);
            canvas.drawTextOnPath(mStr[i],path,30,80,mPaint);

           mStartAngle +=60;
           textdegress+=60;
        }
    }
}

ZZView（画内圆和指针的类）

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.View;

/**
 * 转盘中间开始按钮和指针
 * @author hasee
 */
public class ZZView extends View {
    Paint mPaint;
    String mStr;
    RectF rectF;
    public ZZView(Context context) {
        super(context);
        brush();
    }
     public ZZView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
         brush();
    }
   private void brush() {
	mPaint=new Paint();
	mPaint.setColor(Color.RED);
	mPaint.setStrokeWidth(10);
	mPaint.setTextSize(60);
	mPaint.setStyle(Paint.Style.FILL);

	rectF=new RectF();
	rectF.top=100;
    rectF.bottom = 350;
    rectF.right = 450;
    rectF.left = 250;

    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
	//设置画笔颜色为黑色，
        mPaint.setColor(Color.BLACK);
        //画出指针，用一个扇形，然后盖住后面补分来简单表示
        canvas.drawArc(rectF,60,60,true,mPaint);
        //画一个红色的圆形，就是中间的大按钮
        mPaint.setColor(Color.RED);
        canvas.drawCircle(350,350,90,mPaint);
	//添加按钮上的文字
        mPaint.setColor(Color.BLACK);
      canvas.drawText("start",290,370,mPaint);
     }
}

MainActivity（在里面设置动画）

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.animation.RotateAnimation;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private CircleView circleView;
    private ZZView zzView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        circleView = findViewById(R.id.circleView);
        initView();
    }

    private void initView() {
	//点击事件
        findViewById(R.id.zz).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
            //随机数旋转
                float degrrees=(float)(720+Math.random()*1000);
			//设置动画
                RotateAnimation rotateAnimation=new RotateAnimation(0,-degrrees,350,350);
                rotateAnimation.setDuration(5000);//动画时长
                rotateAnimation.setFillAfter(true);//保持动画完之后的效果
                circleView.setAnimation(rotateAnimation);
                circleView.startAnimation(rotateAnimation);
			 }
        });
    }
}

布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <com.bwie.asus.lottery.CircleView
        android:id="@+id/circleView"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"/>
    <com.bwie.asus.lottery.ZZView
        android:id="@+id/zz"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        />
</RelativeLayout>