android简单抽奖

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--------------------------.xml布局文件中的布局如下：

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_gravity="center"
     >

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@drawable/bigwheelgg"
        />

    <ImageView
        android:id="@+id/lightLv"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@drawable/light"
        />

    <ImageView
          android:id="@+id/wheel"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:src="@drawable/bigwheel"
        />

    <ImageView
              android:id="@+id/point"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:src="@drawable/point"
        />

</FrameLayout>

--------------------显示Activity代码如下：

public class MainActivity extends Activity {

   private ImageView lightlv, wheel, point;
   private static final long ONE_WHEEL_TIME = 500;
   private boolean flag;
   private int[] laps = { 5, 7, 10, 13 };
   private int[] angles = { 0, 60, 120, 180, 240, 300 };
   private int startangle = 0;
   private String[] wheelMessage={"索尼PSP GO","10元红包","谢谢参与","DNF钱包","OPPO MP3","5元红包"};
   private Handler handler = new Handler() {
       public void handleMessage(android.os.Message msg) {
           switch (msg.what) {
           case 0:
               if (flag) {
                   lightlv.setVisibility(View.INVISIBLE);
                   flag = false;
               } else {
                   lightlv.setVisibility(View.VISIBLE);
                   flag = true;
               }
               break;

           default:
               break;
           }
       };
   };

   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);
       lightlv = (ImageView) findViewById(R.id.lightLv);
       wheel = (ImageView) findViewById(R.id.wheel);
       point = (ImageView) findViewById(R.id.point);
       Flash();
       point.setOnClickListener(new OnClickListener() {

           @Override
           public void onClick(View v) {
               int lap = laps[(int) (Math.random() * 4)];
               int angle = angles[(int) (Math.random() * 6)];
               int increaseDegree = lap * 360 + angle;
               RotateAnimation rotateAnimation = new RotateAnimation(
                       startangle, startangle + increaseDegree,
                       RotateAnimation.RELATIVE_TO_SELF, 0.5f,
                       RotateAnimation.RELATIVE_TO_SELF, 0.5f);
               startangle+=increaseDegree;
               long time=(lap+angle/360)*ONE_WHEEL_TIME;
               rotateAnimation.setDuration(time);
               rotateAnimation.setFillAfter(true);
               rotateAnimation.setAnimationListener(animationListener);
               point.startAnimation(rotateAnimation);
           }
       });
   }

   private AnimationListener animationListener=new AnimationListener() {

       @Override
       public void onAnimationStart(Animation animation) {
           // TODO Auto-generated method stub

       }

       @Override
       public void onAnimationRepeat(Animation animation) {
           // TODO Auto-generated method stub

       }

       @Override
       public void onAnimationEnd(Animation animation) {
           String message=wheelMessage[startangle%360/60];
           Toast.makeText(MainActivity.this,"恭喜你抽中"+message,Toast.LENGTH_LONG).show();
       }
   };

   private void Flash() {
       Timer timer = new Timer();
       TimerTask task = new TimerTask() {

           @Override
           public void run() {
               handler.sendEmptyMessage(0);
           }
       };
       timer.schedule(task, 0, ONE_WHEEL_TIME);
   }

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