public class SurfaceViewTemplate extends SurfaceView implements Callback, Runnable 
{ 
 
  private SurfaceHolder mHolder; 
  /** 
   * 与SurfaceHolder绑定的Canvas 
   */ 
  private Canvas mCanvas; 
  /** 
   * 用于绘制的线程 
   */ 
  private Thread t; 
  /** 
   * 线程的控制开关 
   */ 
  private boolean isRunning; 
 
  public SurfaceViewTemplate(Context context) 
  { 
    this(context, null); 
  } 
 
  public SurfaceViewTemplate(Context context, AttributeSet attrs) 
  { 
    super(context, attrs); 
 
    mHolder = getHolder(); 
    mHolder.addCallback(this); 
 
    // setZOrderOnTop(true);// 设置画布 背景透明 
    // mHolder.setFormat(PixelFormat.TRANSLUCENT); 
     
    //设置可获得焦点 
    setFocusable(true); 
    setFocusableInTouchMode(true); 
    //设置常亮 
    this.setKeepScreenOn(true); 
 
  } 
 
  @Override 
  public void surfaceCreated(SurfaceHolder holder) 
  { 
 
    // 开启线程 
    isRunning = true; 
    t = new Thread(this); 
    t.start(); 
  } 
 
  @Override 
  public void surfaceChanged(SurfaceHolder holder, int format, int width, 
      int height) 
  { 
    // TODO Auto-generated method stub 
 
  } 
 
  @Override 
  public void surfaceDestroyed(SurfaceHolder holder) 
  { 
    // 通知关闭线程 
    isRunning = false; 
  } 
 
  @Override 
  public void run() 
  { 
    // 不断的进行draw 
    while (isRunning) 
    { 
      draw(); 
    } 
 
  } 
 
  private void draw() 
  { 
    try 
    { 
      // 获得canvas 
      mCanvas = mHolder.lockCanvas(); 
      if (mCanvas != null) 
      { 
        // drawSomething.. 
      } 
    } catch (Exception e) 
    { 
    } finally 
    { 
      if (mCanvas != null) 
        mHolder.unlockCanvasAndPost(mCanvas); 
    } 
  } 
} 

public class LuckyPanView extends SurfaceView implements Callback, Runnable 
{ 
 
  private SurfaceHolder mHolder; 
  /** 
   * 与SurfaceHolder绑定的Canvas 
   */ 
  private Canvas mCanvas; 
  /** 
   * 用于绘制的线程 
   */ 
  private Thread t; 
  /** 
   * 线程的控制开关 
   */ 
  private boolean isRunning; 
 
  /** 
   * 抽奖的文字 
   */ 
  private String[] mStrs = new String[] { "单反相机", "IPAD", "恭喜发财", "IPHONE", 
      "妹子一只", "恭喜发财" }; 
  /** 
   * 每个盘块的颜色 
   */ 
  private int[] mColors = new int[] { 0xFFFFC300, 0xFFF17E01, 0xFFFFC300, 
      0xFFF17E01, 0xFFFFC300, 0xFFF17E01 }; 
  /** 
   * 与文字对应的图片 
   */ 
  private int[] mImgs = new int[] { R.drawable.danfan, R.drawable.ipad, 
      R.drawable.f040, R.drawable.iphone, R.drawable.meizi, 
      R.drawable.f040 }; 
 
  /** 
   * 与文字对应图片的bitmap数组 
   */ 
  private Bitmap[] mImgsBitmap; 
  /** 
   * 盘块的个数 
   */ 
  private int mItemCount = 6; 
 
  /** 
   * 绘制盘块的范围 
   */ 
  private RectF mRange = new RectF(); 
  /** 
   * 圆的直径 
   */ 
  private int mRadius; 
  /** 
   * 绘制盘快的画笔 
   */ 
  private Paint mArcPaint; 
 
  /** 
   * 绘制文字的画笔 
   */ 
  private Paint mTextPaint; 
 
  /** 
   * 滚动的速度 
   */ 
  private double mSpeed; 
  private volatile float mStartAngle = 0; 
  /** 
   * 是否点击了停止 
   */ 
  private boolean isShouldEnd; 
 
  /** 
   * 控件的中心位置 
   */ 
  private int mCenter; 
  /** 
   * 控件的padding，这里我们认为4个padding的值一致，以paddingleft为标准 
   */ 
  private int mPadding; 
 
  /** 
   * 背景图的bitmap 
   */ 
  private Bitmap mBgBitmap = BitmapFactory.decodeResource(getResources(), 
      R.drawable.bg2); 
  /** 
   * 文字的大小 
   */ 
  private float mTextSize = TypedValue.applyDimension( 
      TypedValue.COMPLEX_UNIT_SP, 20, getResources().getDisplayMetrics()); 
 
  public LuckyPanView(Context context) 
  { 
    this(context, null); 
  } 
 
  public LuckyPanView(Context context, AttributeSet attrs) 
  { 
    super(context, attrs); 
 
    mHolder = getHolder(); 
    mHolder.addCallback(this); 
 
    // setZOrderOnTop(true);// 设置画布 背景透明 
    // mHolder.setFormat(PixelFormat.TRANSLUCENT); 
 
    setFocusable(true); 
    setFocusableInTouchMode(true); 
    this.setKeepScreenOn(true); 
 
  } 

/** 
   * 设置控件为正方形 
   */ 
  @Override 
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) 
  { 
    super.onMeasure(widthMeasureSpec, heightMeasureSpec); 
 
    int width = Math.min(getMeasuredWidth(), getMeasuredHeight()); 
    // 获取圆形的直径 
    mRadius = width - getPaddingLeft() - getPaddingRight(); 
    // padding值 
    mPadding = getPaddingLeft(); 
    // 中心点 
    mCenter = width / 2; 
    setMeasuredDimension(width, width); 
  } 

@Override 
  public void surfaceCreated(SurfaceHolder holder) 
  { 
    // 初始化绘制圆弧的画笔 
    mArcPaint = new Paint(); 
    mArcPaint.setAntiAlias(true); 
    mArcPaint.setDither(true); 
    // 初始化绘制文字的画笔 
    mTextPaint = new Paint(); 
    mTextPaint.setColor(0xFFffffff); 
    mTextPaint.setTextSize(mTextSize); 
    // 圆弧的绘制范围 
    mRange = new RectF(getPaddingLeft(), getPaddingLeft(), mRadius 
        + getPaddingLeft(), mRadius + getPaddingLeft()); 
 
    // 初始化图片 
    mImgsBitmap = new Bitmap[mItemCount]; 
    for (int i = 0; i < mItemCount; i++) 
    { 
      mImgsBitmap[i] = BitmapFactory.decodeResource(getResources(), 
          mImgs[i]); 
    } 
 
    // 开启线程 
    isRunning = true; 
    t = new Thread(this); 
    t.start(); 
  } 

@Override 
  public void surfaceChanged(SurfaceHolder holder, int format, int width, 
      int height) 
  { 
    // TODO Auto-generated method stub 
 
  } 
 
  @Override 
  public void surfaceDestroyed(SurfaceHolder holder) 
  { 
    // 通知关闭线程 
    isRunning = false; 
  } 

@Override 
  public void run() 
  { 
    // 不断的进行draw 
    while (isRunning) 
    { 
      long start = System.currentTimeMillis(); 
      draw(); 
      long end = System.currentTimeMillis(); 
      try 
      { 
        if (end - start < 50) 
        { 
          Thread.sleep(50 - (end - start)); 
        } 
      } catch (InterruptedException e) 
      { 
        e.printStackTrace(); 
      } 
 
    } 
 
  } 
 
  private void draw() 
  { 
    try 
    { 
      // 获得canvas 
      mCanvas = mHolder.lockCanvas(); 
      if (mCanvas != null) 
      { 
        // 绘制背景图 
        drawBg(); 
 
        /** 
         * 绘制每个块块，每个块块上的文本，每个块块上的图片 
         */ 
        float tmpAngle = mStartAngle; 
        float sweepAngle = (float) (360 / mItemCount); 
        for (int i = 0; i < mItemCount; i++) 
        { 
          // 绘制快快 
          mArcPaint.setColor(mColors[i]); 
          mCanvas.drawArc(mRange, tmpAngle, sweepAngle, true, 
              mArcPaint); 
          // 绘制文本 
          drawText(tmpAngle, sweepAngle, mStrs[i]); 
          // 绘制Icon 
          drawIcon(tmpAngle, i); 
 
          tmpAngle += sweepAngle; 
        } 
 
        // 如果mSpeed不等于0，则相当于在滚动 
        mStartAngle += mSpeed; 
 
        // 点击停止时，设置mSpeed为递减，为0值转盘停止 
        if (isShouldEnd) 
        { 
          mSpeed -= 1; 
        } 
        if (mSpeed <= 0) 
        { 
          mSpeed = 0; 
          isShouldEnd = false; 
        } 
        // 根据当前旋转的mStartAngle计算当前滚动到的区域 
        calInExactArea(mStartAngle); 
      } 
    } catch (Exception e) 
    { 
      e.printStackTrace(); 
    } finally 
    { 
      if (mCanvas != null) 
        mHolder.unlockCanvasAndPost(mCanvas); 
    } 
 
  } 

/** 
 * 根据当前旋转的mStartAngle计算当前滚动到的区域 绘制背景，不重要，完全为了美观 
 */ 
private void drawBg() 
{ 
  mCanvas.drawColor(0xFFFFFFFF); 
  mCanvas.drawBitmap(mBgBitmap, null, new Rect(mPadding / 2, 
      mPadding / 2, getMeasuredWidth() - mPadding / 2, 
      getMeasuredWidth() - mPadding / 2), null); 
} 

// 绘制快快 
          mArcPaint.setColor(mColors[i]); 
          mCanvas.drawArc(mRange, tmpAngle, sweepAngle, true, 
              mArcPaint); 

/** 
   * 绘制文本 
   * 
   * @param rect 
   * @param startAngle 
   * @param sweepAngle 
   * @param string 
   */ 
  private void drawText(float startAngle, float sweepAngle, String string) 
  { 
    Path path = new Path(); 
    path.addArc(mRange, startAngle, sweepAngle); 
    float textWidth = mTextPaint.measureText(string); 
    // 利用水平偏移让文字居中 
    float hOffset = (float) (mRadius * Math.PI / mItemCount / 2 - textWidth / 2);// 水平偏移 
    float vOffset = mRadius / 2 / 6;// 垂直偏移 
    mCanvas.drawTextOnPath(string, path, hOffset, vOffset, mTextPaint); 
  } 

/** 
   * 绘制图片 
   * 
   * @param startAngle 
   * @param sweepAngle 
   * @param i 
   */ 
  private void drawIcon(float startAngle, int i) 
  { 
    // 设置图片的宽度为直径的1/8 
    int imgWidth = mRadius / 8; 
 
    float angle = (float) ((30 + startAngle) * (Math.PI / 180)); 
 
    int x = (int) (mCenter + mRadius / 2 / 2 * Math.cos(angle)); 
    int y = (int) (mCenter + mRadius / 2 / 2 * Math.sin(angle)); 
 
    // 确定绘制图片的位置 
    Rect rect = new Rect(x - imgWidth / 2, y - imgWidth / 2, x + imgWidth 
        / 2, y + imgWidth / 2); 
 
    mCanvas.drawBitmap(mImgsBitmap[i], null, rect, null); 
 
  } 

mStartAngle += mSpeed;

/** 
   * 点击开始旋转 
   * 
   * @param luckyIndex 
   */ 
  public void luckyStart(int luckyIndex) 
  { 
    // 每项角度大小 
    float angle = (float) (360 / mItemCount); 
    // 中奖角度范围（因为指针向上，所以水平第一项旋转到指针指向，需要旋转210-270；） 
    float from = 270 - (luckyIndex + 1) * angle; 
    float to = from + angle; 
    // 停下来时旋转的距离 
    float targetFrom = 4 * 360 + from; 
    /** 
     * <pre> 
     * (v1 + 0) * (v1+1) / 2 = target ; 
     * v1*v1 + v1 - 2target = 0 ; 
     * v1=-1+(1*1 + 8 *1 * target)/2; 
     * </pre> 
     */ 
    float v1 = (float) (Math.sqrt(1 * 1 + 8 * 1 * targetFrom) - 1) / 2; 
    float targetTo = 4 * 360 + to; 
    float v2 = (float) (Math.sqrt(1 * 1 + 8 * 1 * targetTo) - 1) / 2; 
 
    mSpeed = (float) (v1 + Math.random() * (v2 - v1)); 
    isShouldEnd = false; 
  } 

float from = 270 - (luckyIndex + 1) * angle; 
    float to = from + angle; 

public void luckyEnd() 
  { 
    mStartAngle = 0; 
    isShouldEnd = true; 
  } 

package com.zhy.demo_zhy_06_choujiangzhuanpan; 
 
import android.app.Activity; 
import android.os.Bundle; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.ImageView; 
 
import com.zhy.view.LuckyPanView; 
 
public class MainActivity extends Activity 
{ 
  private LuckyPanView mLuckyPanView; 
  private ImageView mStartBtn; 
 
  @Override 
  protected void onCreate(Bundle savedInstanceState) 
  { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
 
    mLuckyPanView = (LuckyPanView) findViewById(R.id.id_luckypan); 
    mStartBtn = (ImageView) findViewById(R.id.id_start_btn); 
 
    mStartBtn.setOnClickListener(new OnClickListener() 
    { 
      @Override 
      public void onClick(View v) 
      { 
        if (!mLuckyPanView.isStart()) 
        { 
          mStartBtn.setImageResource(R.drawable.stop); 
          mLuckyPanView.luckyStart(1); 
        } else 
        { 
          if (!mLuckyPanView.isShouldEnd()) 
 
          { 
            mStartBtn.setImageResource(R.drawable.start); 
            mLuckyPanView.luckyEnd(); 
          } 
        } 
      } 
    }); 
  } 
 
} 

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  xmlns:tools="http://schemas.android.com/tools" 
  android:layout_width="match_parent" 
  android:background="#ffffff" 
  android:layout_height="match_parent" > 
 
  <com.zhy.view.LuckyPanView 
    android:id="@+id/id_luckypan" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:layout_centerInParent="true" 
    android:padding="30dp" /> 
   
  <ImageView  
    android:id="@+id/id_start_btn" 
    android:src="@drawable/start" 
    android:layout_centerInParent="true" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    /> 
 
 
</RelativeLayout>