Android实现弹力伸缩式菜单

利用Android中自带的动画效果来实现弹力伸缩式菜单，默认情况下，菜单项为隐藏状态，当点击某一图标，打开菜单项，则通过一系列动画效果实现菜单项的展示；当再次点击该图标时，关闭菜单项，则通过一系列动画实现菜单项的隐藏。效果图如下：

实现原理：

利用Android设置动画的同时，并使用插入器（interpolator）来实现弹力

OvershootInterpolator插入器，表示向前甩出一定值后再回到之前的位置

AnticipateOvershootInterpolator插入器，表示开始的时候向后，然后向前甩

1、自定义相对布局I114gBoxRelativeLayout类，源码如下：

package com.i114gbox.sdk.ui;import android.content.Context;import android.util.AttributeSet;import android.view.View;import android.view.animation.Animation;import android.widget.RelativeLayout;import com.i114gbox.sdk.animation.I114gBoxZoomAnimation;import com.i114gbox.sdk.utils.I114gBoxLogUtils;/** * 自定义相对布局 *  * @author [e-mail] *  */public class I114gBoxRelativeLayout extends RelativeLayout {private static String TAG = "I114gBoxRelativeLayout";private Animation mAnimation;// 动画对象public I114gBoxRelativeLayout(Context ctx) {super(ctx);}public I114gBoxRelativeLayout(Context ctx, AttributeSet attrs) {super(ctx, attrs);}public I114gBoxRelativeLayout(Context ctx, AttributeSet attrs, int defStyle) {super(ctx, attrs, defStyle);}/** 开始指定的动画 **/@Overridepublic void startAnimation(Animation animation) {I114gBoxLogUtils.d(TAG, "The startAnimation method execute.");super.startAnimation(animation);this.mAnimation = animation;this.getRootView().postInvalidate();// 刷新界面，不需要Handler，是工作者线程// this.getRootView().invalidate();//刷新界面，需要被主线程调用，需要Handler}/** 通知和目前有关的视图动画开始 **/@Overrideprotected void onAnimationStart() {I114gBoxLogUtils.d(TAG, "The onAnimationStart method execute.");super.onAnimationStart();if (this.mAnimation instanceof I114gBoxZoomAnimation) {setVisibility(View.VISIBLE);}}/** 通知和目前有关的视图动画结束 **/@Overrideprotected void onAnimationEnd() {I114gBoxLogUtils.d(TAG, "The onAnimationEnd method execute.");super.onAnimationEnd();if (this.mAnimation instanceof I114gBoxZoomAnimation) {setVisibility(((I114gBoxZoomAnimation) mAnimation).mDirection != I114gBoxZoomAnimation.Direction.HIDE ? View.GONE: View.VISIBLE);}}}

2、自定义图片按钮控件I114gBoxImageButton类，源码如下：

package com.i114gbox.sdk.ui;import com.i114gbox.sdk.animation.I114gBoxZoomAnimation;import com.i114gbox.sdk.utils.I114gBoxLogUtils;import android.content.Context;import android.util.AttributeSet;import android.view.View;import android.view.animation.Animation;import android.widget.ImageButton;/** * 自定义ImageButton *  * @author [e-mail] *  */public class I114gBoxImageButton extends ImageButton {private static String TAG = "I114gBoxImageButton";private Animation mAnimation;// 动画对象public I114gBoxImageButton(Context ctx) {super(ctx);}public I114gBoxImageButton(Context ctx, AttributeSet attrs) {super(ctx, attrs);}public I114gBoxImageButton(Context ctx, AttributeSet attrs, int defStyle) {super(ctx, attrs, defStyle);}@Overridepublic void startAnimation(Animation animation) {I114gBoxLogUtils.d(TAG, "The startAnimation method execute.");super.startAnimation(animation);this.mAnimation = animation;this.getRootView().postInvalidate();}@Overrideprotected void onAnimationStart() {I114gBoxLogUtils.d(TAG, "The onAnimationStart method execute.");super.onAnimationStart();if (this.mAnimation instanceof I114gBoxZoomAnimation) {setVisibility(View.VISIBLE);}}@Overrideprotected void onAnimationEnd() {I114gBoxLogUtils.d(TAG, "The onAnimationEnd method execute.");super.onAnimationEnd();if (this.mAnimation instanceof I114gBoxZoomAnimation) {setVisibility(((I114gBoxZoomAnimation) mAnimation).mDirection != I114gBoxZoomAnimation.Direction.HIDE ? View.GONE: View.VISIBLE);}}}

3、include到主layout中的布局文件如下：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <RelativeLayout        android:layout_width="match_parent"        android:layout_height="match_parent"        android:clipChildren="false"        android:clipToPadding="false" >        <com.i114gbox.sdk.ui.I114gBoxRelativeLayout            android:id="@id/rl_menus_wrapper"            android:layout_width="match_parent"            android:layout_height="120dip"            android:layout_alignParentBottom="true"            android:layout_alignParentLeft="true"            android:clipChildren="false"            android:clipToPadding="false"            android:focusable="true" >            <com.i114gbox.sdk.ui.I114gBoxImageButton                android:id="@+id/menu_photo"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_alignParentBottom="true"                android:layout_alignParentLeft="true"                android:layout_marginBottom="100.0px"                android:layout_marginLeft="10dp"                android:background="@drawable/menu_tapjoy"                android:visibility="gone" />            <com.i114gbox.sdk.ui.I114gBoxImageButton                android:id="@+id/menu_people"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_alignParentBottom="true"                android:layout_alignParentLeft="true"                android:layout_marginBottom="100.0px"                android:layout_marginLeft="55dp"                android:background="@drawable/menu_qq"                android:visibility="gone" />            <com.i114gbox.sdk.ui.I114gBoxImageButton                android:id="@+id/menu_place"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_alignParentBottom="true"                android:layout_alignParentLeft="true"                android:layout_marginBottom="100.0px"                android:layout_marginLeft="100dp"                android:background="@drawable/menu_wechat"                android:visibility="gone" />            <com.i114gbox.sdk.ui.I114gBoxImageButton                android:id="@+id/menu_music"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_alignParentBottom="true"                android:layout_alignParentLeft="true"                android:layout_marginBottom="100.0px"                android:layout_marginLeft="145dp"                android:background="@drawable/menu_sina_weibo"                android:visibility="gone" />            <com.i114gbox.sdk.ui.I114gBoxImageButton                android:id="@+id/menu_thought"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_alignParentBottom="true"                android:layout_alignParentLeft="true"                android:layout_marginBottom="100.0px"                android:layout_marginLeft="190dp"                android:background="@drawable/menu_facebook"                android:visibility="gone" />            <com.i114gbox.sdk.ui.I114gBoxImageButton                android:id="@+id/menu_sleep"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_alignParentBottom="true"                android:layout_alignParentLeft="true"                android:layout_marginBottom="100.0px"                android:layout_marginLeft="235dp"                android:background="@drawable/menu_alipay"                android:visibility="gone" />        </com.i114gbox.sdk.ui.I114gBoxRelativeLayout>        <com.i114gbox.sdk.ui.I114gBoxRelativeLayout            android:id="@id/rl_menu_main_shrink"            android:layout_width="60dp"            android:layout_height="50dp"            android:layout_alignParentBottom="true"            android:layout_centerHorizontal="true"            android:background="@drawable/main_center_button" >            <ImageView                android:id="@id/iv_menu_main_plus"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_centerInParent="true"                android:contentDescription="@string/menu"                android:src="@drawable/menu_icn_plus" />        </com.i114gbox.sdk.ui.I114gBoxRelativeLayout>    </RelativeLayout></LinearLayout>

4、实现菜单项打开时的动画效果：

// 获取菜单添加视图imageViewPlus = findViewById(I114gBoxResourceUtils.getId(ctx,"iv_menu_main_plus"));// 获取菜单包裹视图组，存放多个菜单项menusWrapper = (ViewGroup) findViewById(I114gBoxResourceUtils.getId(ctx, "rl_menus_wrapper"));// 获取菜单添加视图的布局menuShrinkView = findViewById(I114gBoxResourceUtils.getId(ctx,"rl_menu_main_shrink"));// layoutMain = (RelativeLayout) findViewById(R.id.layout_content);// 打开菜单时，顺时针动画animRotateClockwise = AnimationUtils.loadAnimation(ctx,I114gBoxResourceUtils.getAnimId(ctx, "menu_rotate_clockwise"));// 关闭菜单时，逆时针动画animRotateAntiClockwise = AnimationUtils.loadAnimation(ctx,I114gBoxResourceUtils.getAnimId(ctx,"menu_rotate_anticlockwise"));// 添加监听事件menuShrinkView.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {showLinearMenus();// 显示菜单项}});for (int i = 0; i < menusWrapper.getChildCount(); i++) {menusWrapper.getChildAt(i).setOnClickListener(new SpringMenuLauncher(intentActivity[i]));}/*** 显示菜单项*/private void showLinearMenus() {int[] size = I114gBoxSystemManagerUtils.getScreenSize(ctx);// 获取屏幕高度和宽度if (!areMenusShowing) {// 当菜单未打开时I114gBoxAnimation.startAnimations(this.menusWrapper,Direction.SHOW, size);this.imageViewPlus.startAnimation(this.animRotateClockwise);} else {// 当菜单已打开时I114gBoxAnimation.startAnimations(this.menusWrapper,Direction.HIDE, size);this.imageViewPlus.startAnimation(this.animRotateAntiClockwise);}areMenusShowing = !areMenusShowing;}private class I114gBoxMenuLauncher implements OnClickListener {private final Class<?> cls;private int resource;private I114gBoxMenuLauncher(Class<?> c, int resource) {this.cls = c;this.resource = resource;}private I114gBoxMenuLauncher(Class<?> c) {this.cls = c;}public void onClick(View v) {MainActivity.this.startOpenMenuAnimations(v);// 打开菜单项动画Intent intent = new Intent(ctx, cls);ctx.startActivity(intent);}}/** 打开菜单项动画 **/private void startOpenMenuAnimations(View view) {areMenusShowing = true;Animation inAnimation = new I114gBoxShrinkAnimationOut(300);Animation outAnimation = new I114gBoxEnlargeAnimationOut(300);inAnimation.setInterpolator(new AnticipateInterpolator(2.0F));// inAnimation.setInterpolator(new CycleInterpolator(2.0F));inAnimation.setAnimationListener(new Animation.AnimationListener() {@Overridepublic void onAnimationEnd(Animation animation) {MainActivity.this.imageViewPlus.clearAnimation();}@Overridepublic void onAnimationRepeat(Animation animation) {}@Overridepublic void onAnimationStart(Animation animation) {}});view.startAnimation(outAnimation);}

5、顺时针动画定义：

<?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"/>

6、逆时针动画定义：

<?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="225.0"android:toDegrees="0.0"android:pivotX="50.0%"android:pivotY="50.0%"android:fillAfter="true"android:fillEnabled="true"/>

注意：

<1>需要定义顺时针和逆时针动画文件

<2>需要将动画效果和插入器相结合

可通过 https://play.google.com/store/apps/details?id=com.i114gbox.aglieguy&hl=zh-CN 下载相关游戏应用！