package com.zhy._01;

public class Test2
{
 public static void main(String[] args)
 {
 float val = 1; 
 float s = 0.85f;
 int i = 0;
 s = (float) Math.sqrt(1 / s);    System.out.println(val);
 while (i < 5)
 {
 val = val *s ;
 System.out.println(val);
 i++;
 }
 s = 0.85f;
 i = 0;
 s = (float) Math.sqrt(s);
 while (i < 5)
 {
 val = val *s ;
 System.out.println(val);
 i++;
 }

 }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 android:background="@drawable/bkg_img_default"
 android:gravity="center"
 android:orientation="vertical" >

 <LinearLayout
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:orientation="vertical" >

  <LinearLayout
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:orientation="horizontal" >

   <LinearLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical" >

    <com.ljp.ani01.MyImageView
     android:id="@+id/c_joke"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_margin="2dp"
     android:scaleType="matrix"
     android:src="@drawable/left_top" />

    <com.ljp.ani01.MyImageView
     android:id="@+id/c_idea"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_margin="2dp"
     android:scaleType="matrix"
     android:src="@drawable/left_bottom" />
   </LinearLayout>

   <com.ljp.ani01.MyImageView
    android:id="@+id/c_constellation"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_margin="2dp"
    android:scaleType="matrix"
    android:src="@drawable/right" />
  </LinearLayout>

  <com.ljp.ani01.MyImageView
   android:id="@+id/c_recommend"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_margin="2dp"
   android:scaleType="matrix"
   android:src="@drawable/bottom" />
 </LinearLayout>

</LinearLayout>

package com.ljp.ani01;

import android.content.Context;
import android.graphics.Matrix;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.Handler;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.widget.ImageView;

public class MyImageView extends ImageView
{

 private static final String TAG = "MyImageView";

 private static final int SCALE_REDUCE_INIT = 0;
 private static final int SCALING = 1;
 private static final int SCALE_ADD_INIT = 6;

 /**
 * 控件的宽
 */
 private int mWidth;
 /**
 * 控件的高
 */
 private int mHeight;
 /**
 * 控件的宽1/2
 */
 private int mCenterWidth;
 /**
 * 控件的高 1/2
 */
 private int mCenterHeight;
 /**
 * 设置一个缩放的常量
 */
 private float mMinScale = 0.85f;
 /**
 * 缩放是否结束
 */
 private boolean isFinish = true;

 public MyImageView(Context context)
 {
 this(context, null);
 }

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

 public MyImageView(Context context, AttributeSet attrs, int defStyle)
 {
 super(context, attrs, defStyle);
 }

 /**
 * 必要的初始化
 */
 @Override
 protected void onLayout(boolean changed, int left, int top, int right, int bottom)
 {
 super.onLayout(changed, left, top, right, bottom);
 if (changed)
 {
 mWidth = getWidth() - getPaddingLeft() - getPaddingRight();
 mHeight = getHeight() - getPaddingTop() - getPaddingBottom();

 mCenterWidth = mWidth / 2;
 mCenterHeight = mHeight / 2;

 Drawable drawable = getDrawable();
 BitmapDrawable bd = (BitmapDrawable) drawable;
 bd.setAntiAlias(true);
 }
 }

 @Override
 public boolean onTouchEvent(MotionEvent event)
 {
 switch (event.getAction())
 {
 case MotionEvent.ACTION_DOWN:
 float X = event.getX();
 float Y = event.getY();
 mScaleHandler.sendEmptyMessage(SCALE_REDUCE_INIT);
 break;
 case MotionEvent.ACTION_UP:
 mScaleHandler.sendEmptyMessage(SCALE_ADD_INIT);
 break;
 }
 return true;
 }

 /**
 * 控制缩放的Handler
 */
 private Handler mScaleHandler = new Handler()
 {
 private Matrix matrix = new Matrix();
 private int count = 0;
 private float s;
 /**
 * 是否已经调用了点击事件
 */
 private boolean isClicked;

 public void handleMessage(android.os.Message msg)
 {
 matrix.set(getImageMatrix());
 switch (msg.what)
 {
 case SCALE_REDUCE_INIT:
 if (!isFinish)
 {
  mScaleHandler.sendEmptyMessage(SCALE_REDUCE_INIT);
 } else
 {
  isFinish = false;
  count = 0;
  s = (float) Math.sqrt(Math.sqrt(mMinScale));
  beginScale(matrix, s);
  mScaleHandler.sendEmptyMessage(SCALING);
 }
 break;
 case SCALING:
 beginScale(matrix, s);
 if (count < 4)
 {
  mScaleHandler.sendEmptyMessage(SCALING);
 } else
 {
  isFinish = true;
  if (MyImageView.this.mOnViewClickListener != null && !isClicked)
  {
  isClicked = true;
  MyImageView.this.mOnViewClickListener.onViewClick(MyImageView.this);
  } else
  {
  isClicked = false;
  }
 }
 count++;

 break;
 case 6:
 if (!isFinish)
 {
  mScaleHandler.sendEmptyMessage(SCALE_ADD_INIT);
 } else
 {
  isFinish = false;
  count = 0;
  s = (float) Math.sqrt(Math.sqrt(1.0f / mMinScale));
  beginScale(matrix, s);
  mScaleHandler.sendEmptyMessage(SCALING);
 }
 break;
 }
 }
 };

 protected void sleep(int i)
 {
 try
 {
 Thread.sleep(i);
 } catch (InterruptedException e)
 {
 e.printStackTrace();
 }
 }

 /**
 * 缩放
 * 
 * @param matrix
 * @param scale
 */
 private synchronized void beginScale(Matrix matrix, float scale)
 {
 matrix.postScale(scale, scale, mCenterWidth, mCenterHeight);
 setImageMatrix(matrix);
 }

 /**
 * 回调接口
 */
 private OnViewClickListener mOnViewClickListener;

 public void setOnClickIntent(OnViewClickListener onViewClickListener)
 {
 this.mOnViewClickListener = onViewClickListener;
 }

 public interface OnViewClickListener
 {
 void onViewClick(MyImageView view);
 }

}

package com.ljp.ani01;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Toast;

public class TestRolateAnimActivity extends Activity
{
 MyImageView joke;

 @Override
 public void onCreate(Bundle savedInstanceState)
 {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.main);

 joke = (MyImageView) findViewById(R.id.c_joke);
 joke.setOnClickIntent(new MyImageView.OnViewClickListener()
 {

 @Override
 public void onViewClick(MyImageView view)
 {
 Toast.makeText(TestRolateAnimActivity.this, "Joke", 1000).show();
 }
 });
 }
 
 
}