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Path2.0中绚丽的的旋转菜单

时间:2014-12-24 19:52:13      阅读:211      评论:0      收藏:0      [点我收藏+]

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我们看一下实现的效果图:

技术分享

在上图中,我将菜单弹出的效果设置成直线型,最终的弹出或汇总点在下面的红色按钮中。

  它的实现原理是设置动画的同时并利用动画中的插入器(interpolator)来实现弹力。主要用到了OvershootInterpolator和AnticipateOvershootInterpolator,简单介绍下这两个插入器。

  • OvershootInterpolator:表示向前甩一定值后再回到原来位置。
  • AnticipateOvershootInterpolator:表示开始的时候向后然后向前甩一定值后返回最后的值。

  当然还有其它的插入器,简要了解下其作用:

  • AnticipateInterpolator:表示开始的时候向后然后向前甩。
  • BounceInterpolator:表示动画结束的时候弹起。
  • OvershootInterpolator:表示向前甩一定值后再回到原来位置。
  • CycleInterpolator:表示动画循环播放特定的次数,速率改变沿着正弦曲线。
  • DecelerateInterpolator:表示在动画开始的地方快然后慢。
  • LinearInterpolator:表示以常量速率改变。

  我们可以通过一些示例加深对这几个插入器的了解。在API Demos中有些示例,大家去可以直接研究下API Demos中的Animation部分。

  具体可查看官方文档:http://developer.android.com/reference/android/view/animation/package-summary.html,这里不再详述。

MainActivity中的代码:

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实现伸缩弹力分布菜单效果
 * @Description: Android实现伸缩弹力分布菜单效果

 * @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;
    // 顺时针旋转动画
    private Animation animRotateClockwise;
    // 你试着旋转动画
    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]));
        }
    }

    /**
     * 以直线型展开菜单
     */
    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;
    }

    // 分布菜单事件监听器
    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));
        }
    }

    /**
     * 展现菜单动画效果
     * @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);
    }
}

在点击红色按钮时弹出最上面的菜单,点击某个菜单时变换上面的背景图片,当然也可直接进入某个Activity。所以上面定义了 intentActivity和mainResources两个数组,分别代表切换的Activity和要变换的图片。大家可根据实际的需要进行设置。在 进行点击红色按钮时中间的加号向右进行旋转225度变成叉号,通过如下的动画:

<?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"/>

再次点击则向左旋转还原,将上面的android:fromDegrees和android:toDegrees替换下即可。

下面了解下另一个重要的动画类是SpringAnimation,由它来控制各个菜单的动画效果,代码如下所示:

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;

/**
 * 分布菜单加载和伸缩动画
 * @Description: 分布菜单加载和伸缩动画

 * @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;
    
    /**
     * 构造器
     * @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;
    }

    /**
     * 开始显示动画效果
     * @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;
        }
    }

    /**
     * 开始呈现菜单
     * @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);
            }
        }
    }

    /**
     * 开始隐藏菜单
     * @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, 
                0F,yOffset + mlp.bottomMargin, 0F));
    }

    @Override
    protected void addEnlargeAnimation(View[] views) {
        // TODO Auto-generated method stub
        MarginLayoutParams mlp = (MarginLayoutParams) views[0].
                getLayoutParams();
        addAnimation(new TranslateAnimation(
                0F, xOffset + -mlp.leftMargin, 
                0F,yOffset + mlp.bottomMargin));
    }
}

该类继承自ZoomAnimation,关于ZoomAnimation代码如下:

package com.spring.menu.animation;

import android.view.View;
import android.view.animation.AnimationSet;

/**
 * 放大缩小动画类
 * @Description: 放大缩小动画类

 * @File: ZoomAnimation.java

 * @Package com.spring.menu.animation

 * @Author Hanyonglu

 * @Date 2012-10-25 下午11:37:52

 * @Version V1.0
 */
public abstract class ZoomAnimation extends AnimationSet {
    public Direction direction;

    public enum Direction {
        HIDE, SHOW;
    }

    public ZoomAnimation(Direction direction, long duration, View[] views) {
        super(true);
        this.direction = direction;
        
        switch (this.direction) {
        case HIDE:
            addShrinkAnimation(views);
            break;
        case SHOW:
            addEnlargeAnimation(views);
            break;
        }
        
        setDuration(duration);
    }

    protected abstract void addShrinkAnimation(View[] views);
    
    protected abstract void addEnlargeAnimation(View[] views);
}

  有时我们为了增强用户体验,我们可以将直线设置成半圆形或是半椭圆形,可以利用Bresenham算法或是其它的方案实现半圆或半椭圆的菜单,而不是简单的将菜单定位在某个地方。关于这个,有兴趣的朋友可参阅相关资料去实现它。

   另外,上面的例子并没有实现动态的设置菜单的个数。个人觉得最好能动态设置菜单的布局,这样在添加或减少菜单时比较方便。一般的过 程是利用一个数组(代表图片资源),根据数组来实现它的布局。包括上段中提到的实现半圆形展开也要进行动态的设置。本来我想去实现它,但是真的没有那么多 时间,有需要的朋友可以去填充程序的SpringMenuLayout类,在这里我就不去实现它了。

package com.spring.menu.layout;

/**
 * 实现伸缩弹力分布菜单布局类
 * @Description: 实现伸缩弹力分布菜单布局类

 * @File: SpringMenuLayout.java

 * @Package com.spring.menu.layout

 * @Author Hanyonglu

 * @Date 2012-10-26 下午07:57:56

 * @Version V1.0
 */
public class SpringMenuLayout {
    // 自动生成直线型布局
    
    // 自动生成圆弧型布局
}

以上是关于Android中实现伸缩弹力分布菜单效果的实现过程,由于本篇不算是原创性的文章,所以关于代码没有过多的讲解,具体的代码讲解可参考原创文章:http://www.cnblogs.com/mudoot/archive/2012/01/19/path_composer_menu.html ,同时也非常感谢原创作者提供的资料。

示例下载:/Files/hanyonglu/AndroidFile/MySpringMenu.rar

Github地址:https://github.com/hanyonglu/Android-Spring-Menu

Path2.0中绚丽的的旋转菜单

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原文地址:http://www.cnblogs.com/zhujiabin/p/4182987.html

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