源碼簡(jiǎn)介

酷炫的彈力菜單，有橫向和圓弧兩種。

注：該源碼圓弧菜單點(diǎn)擊時(shí)，會(huì)導(dǎo)致程序崩潰.

源碼運(yùn)行截圖

源碼片段：

package com.spring.menu.activity; 
  
import com.spring.menu.R; 
import com.spring.menu.animation.SpringAnimation; 
import com.spring.menu.animation.EnlargeAnimationOut; 
import com.spring.menu.animation.ShrinkAnimationOut; 
import com.spring.menu.animation.ZoomAnimation; 
import com.spring.menu.utility.DeviceUtility; 
  
import android.app.Activity; 
import android.os.Bundle; 
import android.view.View; 
import android.view.ViewGroup; 
import android.view.View.OnClickListener; 
import android.view.animation.Animation; 
import android.view.animation.AnimationUtils; 
import android.view.animation.AnticipateInterpolator; 
import android.widget.RelativeLayout; 
  
/** 
 * Android實(shí)現(xiàn)伸縮彈力分布菜單效果 
 * @Description: Android實(shí)現(xiàn)伸縮彈力分布菜單效果 
  
 * @File: MainActivity.java 
  
 * @Package com.spring.menu.activity 
  
 * @Author Hanyonglu 
  
 * @Date 2012-10-25 下午09:41:31 
  
 * @Version V1.0 
 */ 
public class MainActivity extends Activity { 
    private boolean    areMenusShowing; 
    private ViewGroup menusWrapper; 
    private View imageViewPlus; 
    private View shrinkRelativeLayout; 
    private RelativeLayout layoutMain; 
    // 順時(shí)針旋轉(zhuǎn)動(dòng)畫 
    private Animation animRotateClockwise; 
    // 你試著旋轉(zhuǎn)動(dòng)畫 
    private Animation animRotateAntiClockwise; 
    private Class<!--?-->[] intentActivity = { 
            SecondActivity.class,ThreeActivity.class,FourActivity.class, 
            SecondActivity.class,ThreeActivity.class,FourActivity.class}; 
    private int[] mainResources = { 
            R.drawable.bg_main_1,R.drawable.bg_main_2, 
            R.drawable.bg_main_3,R.drawable.bg_main_4, 
            R.drawable.bg_main_1,R.drawable.bg_main_4}; 
  
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main_activity); 
          
        // 初始化 
        initViews(); 
    } 
      
    // 初始化 
    private void initViews(){ 
        imageViewPlus = findViewById(R.id.imageview_plus); 
        menusWrapper = (ViewGroup) findViewById(R.id.menus_wrapper); 
        shrinkRelativeLayout = findViewById(R.id.relativelayout_shrink); 
        layoutMain = (RelativeLayout) findViewById(R.id.layout_content); 
          
        animRotateClockwise = AnimationUtils.loadAnimation( 
                this,R.anim.rotate_clockwise); 
        animRotateAntiClockwise = AnimationUtils.loadAnimation( 
                this,R.anim.rotate_anticlockwise); 
  
        shrinkRelativeLayout.setOnClickListener(new OnClickListener() { 
  
            public void onClick(View v) { 
                // TODO Auto-generated method stub 
                showLinearMenus(); 
            } 
        }); 
          
        for (int i = 0; i < menusWrapper.getChildCount(); i++) { 
            menusWrapper.getChildAt(i).setOnClickListener( 
                    new SpringMenuLauncher(null,mainResources[i])); 
        } 
    } 
  
    /** 
     * 以直線型展開菜單 
     */ 
    private void showLinearMenus() { 
        int[] size = DeviceUtility.getScreenSize(this); 
          
        if (!areMenusShowing) { 
            SpringAnimation.startAnimations( 
                    this.menusWrapper, ZoomAnimation.Direction.SHOW, size); 
            this.imageViewPlus.startAnimation(this.animRotateClockwise); 
        } else { 
            SpringAnimation.startAnimations( 
                    this.menusWrapper, ZoomAnimation.Direction.HIDE, size); 
            this.imageViewPlus.startAnimation(this.animRotateAntiClockwise); 
        } 
          
        areMenusShowing = !areMenusShowing; 
    } 
  
    // 分布菜單事件監(jiān)聽器 
    private class SpringMenuLauncher implements OnClickListener { 
        private final Class<!--?--> cls; 
        private int resource; 
  
        private SpringMenuLauncher(Class<!--?--> c,int resource) { 
            this.cls = c; 
            this.resource = resource; 
        } 
  
        public void onClick(View v) { 
            // TODO Auto-generated method stub 
            MainActivity.this.startSpringMenuAnimations(v); 
            layoutMain.setBackgroundResource(resource); 
              
//            MainActivity.this.startActivity( 
//                    new Intent( 
//                            MainActivity.this, 
//                            MainActivity.SpringMenuLauncher.this.cls)); 
        } 
    } 
  
    /** 
     * 展現(xiàn)菜單動(dòng)畫效果 
     * @param view 
     * @param runnable 
     */ 
    private void startSpringMenuAnimations(View view) { 
        areMenusShowing = true; 
        Animation shrinkOut1 = new ShrinkAnimationOut(300); 
        Animation growOut = new EnlargeAnimationOut(300); 
        shrinkOut1.setInterpolator(new AnticipateInterpolator(2.0F)); 
        shrinkOut1.setAnimationListener(new Animation.AnimationListener() { 
  
            public void onAnimationEnd(Animation animation) { 
                // TODO Auto-generated method stub 
                MainActivity.this.imageViewPlus.clearAnimation(); 
            } 
  
            public void onAnimationRepeat(Animation animation) { 
                // TODO Auto-generated method stub 
                  
            } 
  
            public void onAnimationStart(Animation animation) { 
                // TODO Auto-generated method stub 
                  
            } 
        }); 
          
        view.startAnimation(growOut); 
    } 
} 
  
在點(diǎn)擊紅色按鈕時(shí)彈出最上面的菜單，點(diǎn)擊某個(gè)菜單時(shí)變換上面的背景圖片，當(dāng)然也可直接進(jìn)入某個(gè)Activity。所以上面定義了intentActivity和mainResources兩個(gè)數(shù)組，分別代表切換的Activity和要變換的圖片。大家可根據(jù)實(shí)際的需要進(jìn)行設(shè)置。在進(jìn)行點(diǎn)擊紅色按鈕時(shí)中間的加號(hào)向右進(jìn)行旋轉(zhuǎn)225變成叉號(hào)，通過如下的動(dòng)畫： 
  
View Row Code 
<!--?xml version="1.0" encoding="UTF-8"?--> 
<rotate xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/linear_interpolator" android:duration="200" android:fromdegrees="0.0" android:todegrees="225.0" android:pivotx="50.0%" android:pivoty="50.0%" android:fillafter="true" android:fillenabled="true"> 
  
　再次點(diǎn)擊則向左旋轉(zhuǎn)還原，將上面的android:fromDegrees和android:toDegrees替換下即可。 
  
下面了解下另一個(gè)重要的動(dòng)畫類是SpringAnimation，由它來控制各個(gè)菜單的動(dòng)畫效果，代碼如下所示： 
  
View Row Code 
package com.spring.menu.animation; 
import com.spring.menu.control.ImageButtonExtend; 
import android.view.View; 
import android.view.ViewGroup; 
import android.view.ViewGroup.MarginLayoutParams; 
import android.view.animation.AnticipateInterpolator; 
import android.view.animation.AnticipateOvershootInterpolator; 
import android.view.animation.OvershootInterpolator; 
import android.view.animation.TranslateAnimation; 
/** 
* 分布菜單加載和伸縮動(dòng)畫 
* @Description: 分布菜單加載和伸縮動(dòng)畫 
* @File: SpringAnimation.java 
* @Package com.spring.menu.animation 
* @Author Hanyonglu 
* @Date 2012-10-25 下午12:18:39 
* @Version V1.0 
*/ 
public class SpringAnimation extends ZoomAnimation { 
private static int[] size; 
private static int xOffset = 210; 
private static int yOffset = -15; 
public static final int DURATION = 300; 
/** 
* 構(gòu)造器 
* @param direction 
* @param duration 
* @param view 
*/ 
public SpringAnimation(Direction direction, long duration, View view) { 
super(direction, duration, new View[] { view }); 
SpringAnimation.xOffset = SpringAnimation.size[0] / 2 - 30; 
} 
/** 
* 開始顯示動(dòng)畫效果 
* @param viewgroup 
* @param direction 
* @param size 
*/ 
public static void startAnimations(ViewGroup viewgroup, 
ZoomAnimation.Direction direction, int[] size) { 
SpringAnimation.size = size; 
switch (direction) { 
case HIDE: 
startShrinkAnimations(viewgroup); 
break; 
case SHOW: 
startEnlargeAnimations(viewgroup); 
break; 
} 
} 
/** 
* 開始呈現(xiàn)菜單 
* @param viewgroup 
*/ 
private static void startEnlargeAnimations(ViewGroup viewgroup) { 
for (int i = 0; i < viewgroup.getChildCount(); i++) { 
if (viewgroup.getChildAt(i) instanceof ImageButtonExtend) { 
ImageButtonExtend inoutimagebutton = (ImageButtonExtend) viewgroup 
.getChildAt(i); 
SpringAnimation animation = new SpringAnimation( 
ZoomAnimation.Direction.HIDE, DURATION, inoutimagebutton); 
animation.setStartOffset((i * 200) 
/ (-1 + viewgroup.getChildCount())); 
animation.setInterpolator(new OvershootInterpolator(4F)); 
inoutimagebutton.startAnimation(animation); 
} 
} 
} 
/** 
* 開始隱藏菜單 
* @param viewgroup 
*/ 
private static void startShrinkAnimations(ViewGroup viewgroup) { 
for (int i = 0; i < viewgroup.getChildCount(); i++) { 
if (viewgroup.getChildAt(i) instanceof ImageButtonExtend) { 
ImageButtonExtend inoutimagebutton = (ImageButtonExtend) viewgroup 
.getChildAt(i); 
SpringAnimation animation = new SpringAnimation( 
ZoomAnimation.Direction.SHOW, DURATION, 
inoutimagebutton); 
animation.setStartOffset((100 * ((-1 + viewgroup 
.getChildCount()) - i)) 
/ (-1 + viewgroup.getChildCount())); 
animation.setInterpolator(new AnticipateOvershootInterpolator(2F)); 
inoutimagebutton.startAnimation(animation); 
} 
} 
} 
@Override 
protected void addShrinkAnimation(View[] views) { 
// TODO Auto-generated method stub 
MarginLayoutParams mlp = (MarginLayoutParams) views[0]. 
getLayoutParams(); 
addAnimation(new TranslateAnimation( 
xOffset + -mlp.leftMargin, 
F,yOffset + mlp.bottomMargin, 0F)); 
} 
@Override 
protected void addEnlargeAnimation(View[] views) { 
// TODO Auto-generated method stub 
MarginLayoutParams mlp = (MarginLayoutParams) views[0]. 
getLayoutParams(); 
addAnimation(new TranslateAnimation( 
F, xOffset + -mlp.leftMargin, 
F,yOffset + mlp.bottomMargin)); 
} 
}</rotate> 

源碼鏈接：http://down.51cto.com/data/1968733

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