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下图是工程目录结构：
MainActivity代码如下：
package com.example.tommy_qq_50;
import com.example.tommy_qq_50.view.SlidingMenu;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
public class MainActivity extends Activity {
private SlidingMenu menu = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
menu = (SlidingMenu) findViewById(R.id.menu);
}
public void toggleMenu(View v){
menu.toggle();
}
}
这里有对setTranslationX()函数的详解： http://blog.csdn.net/yanzi1225627/article/details/47850471
以下是自定义HorizontalScrollView的代码。
package com.example.tommy_qq_50.view;
import com.example.tommy_qq_50.R;
import com.nineoldandroids.view.ViewHelper;
import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.TypedValue;
import android.view.MotionEvent;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.HorizontalScrollView;
import android.widget.LinearLayout;
public class SlidingMenu extends HorizontalScrollView {
private LinearLayout mWapper;
private ViewGroup mMenu;
private ViewGroup mContent;
private int mScreenWidth ;
private int mMenuWidth;
//单位dp,菜单与
private int mMenuRightPadding = 50;
private boolean once = false;
private boolean isOpen = false;
/**
* 当使用了自定义属性时，会调用此构造方法
* @param context
* @param attrs
* @param defStyleAttr
*/
public SlidingMenu(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
//获取我们定义的属性
TypedArray a = context.getTheme().obtainStyledAttributes(attrs,
R.styleable.SlidingMenu,defStyleAttr,0);
int n = a.getIndexCount();
for(int i =0;i<n;i++){
int attr = a.getIndex(i);
switch (attr) {
case R.styleable.SlidingMenu_rightPadding:
mMenuRightPadding = a.getDimensionPixelSize(attr, (int) TypedValue.
applyDimension(TypedValue.COMPLEX_UNIT_DIP, 50,
context.getResources().getDisplayMetrics()));
break;
default:
break;
}
}
a.recycle();
WindowManager wm= (WindowManager) context.getSystemService(context.WINDOW_SERVICE);
DisplayMetrics outMetrics = new DisplayMetrics();
wm.getDefaultDisplay().getMetrics(outMetrics);
mScreenWidth = outMetrics.widthPixels;
}
/**
* 未使用自定义属性时，会调用此构造方法
* @param context
* @param attrs
*/
public SlidingMenu(Context context, AttributeSet attrs) {
this(context, attrs,0);
}
public SlidingMenu(Context context) {
this(context,null);
}
/**
* 设置子View的宽和高
* 设置自己的宽和高
*/
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
if(once == false){
mWapper = (LinearLayout) getChildAt(0);
mMenu = (ViewGroup) mWapper.getChildAt(0);
mContent =(ViewGroup) mWapper.getChildAt(1);
mMenuWidth = mMenu.getLayoutParams().width = mScreenWidth - mMenuRightPadding;
mContent.getLayoutParams().width = mScreenWidth;
once = true;
}
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
//设置子View放置的位置
//通过设置偏移量，将Menu隐藏
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
// TODO Auto-generated method stub
super.onLayout(changed, l, t, r, b);
if(changed){
this.scrollTo(mMenuWidth, 0);
}
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
int action = ev.getAction();
switch (action) {
case MotionEvent.ACTION_UP://用户手指抬起时
//隐藏在左边的宽度
int scrollX = (int) getScrollX();
if(scrollX >= mMenuWidth/2){
this.smoothScrollTo(mMenuWidth, 0);
isOpen = false;
}else {
this.smoothScrollTo(0, 0);
isOpen = true;
}
return true;
}
return super.onTouchEvent(ev);
}
/**
* 打开菜单
*/
public void openMenu(){
if(isOpen)
return ;
else{
this.smoothScrollTo(0, 0);
isOpen = true;
}
}
/**
* 关闭菜单
*/
public void closeMenu(){
if(!isOpen){
return ;
}else {
this.smoothScrollTo(mMenuWidth, 0);
isOpen = false;
}
}
/**
* 切换菜单
*/
public void toggle(){
if(isOpen){
closeMenu();
}else{
openMenu();
}
}
@Override
protected void onScrollChanged(int l, int t, int oldl, int oldt) {
super.onScrollChanged(l, t, oldl, oldt);
float scale = l * 1.0f / mMenuWidth;//1~0
/**
* 区别一：内容区域从1.0-0.7 缩放的效果
scale：1.0 - 0.0
0.7 + 0.3 * scale
区别二：菜单的偏移量要修改
区别三：菜单的显示时有缩放，以及透明度变化。
缩放：0.7 - 1.0
1.0 - scale * 0.3
透明度：0.6 - 1.0
0.6 + 0.4 * （1 - scale）；
*/
float rightScale = (0.7f + 0.3f * scale);
float leftScale = 1.0f - scale * 0.3f;
float leftAlpha = 0.6f + 0.4f * (1 - scale);
//调用属性动画，设置TranslationX
ViewHelper.setTranslationX(mMenu, mMenuWidth * scale * 0.7f);
ViewHelper.setScaleX(mMenu, leftScale);
ViewHelper.setScaleY(mMenu, leftScale);
ViewHelper.setAlpha(mMenu, leftAlpha);
//设置mContent缩放的中心点
ViewHelper.setPivotX(mContent, 0);
ViewHelper.setPivotY(mContent, mContent.getHeight()/2);
ViewHelper.setScaleX(mContent, rightScale);
ViewHelper.setScaleY(mContent, rightScale);
}
}
2、left_menu.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:tommy="http://schemas.android.com/apk/res/com.example.tommy_qq_50"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/img_frame_background"
>
<com.example.tommy_qq_50.view.SlidingMenu
android:id="@+id/menu"
android:layout_width="match_parent"
android:layout_height="match_parent"
tommy:rightPadding="50dp"
>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="horizontal"
>
<include
layout="@layout/left_menu"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/qq"
>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="toggleMenu"
android:text="切换菜单"
/>
</LinearLayout>
</LinearLayout>
</com.example.tommy_qq_50.view.SlidingMenu>
</RelativeLayout>
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:orientation="vertical"
>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<ImageView
android:id="@+id/id_img1"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_marginLeft="20dp"
android:layout_marginTop="20dp"
android:src="@drawable/img_1"
android:layout_centerVertical="true"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:textColor="#ffffff"
android:text="第一个Item"
android:layout_toRightOf="@id/id_img1"
android:layout_marginLeft="20dp"
android:layout_centerVertical="true"
/>
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<ImageView
android:id="@+id/id_img2"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_marginLeft="20dp"
android:layout_marginTop="20dp"
android:src="@drawable/img_2"
android:layout_centerVertical="true"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:textColor="#ffffff"
android:text="第二个Item"
android:layout_toRightOf="@id/id_img2"
android:layout_marginLeft="20dp"
android:layout_centerVertical="true"
/>
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<ImageView
android:id="@+id/id_img3"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_marginLeft="20dp"
android:layout_marginTop="20dp"
android:src="@drawable/img_3"
android:layout_centerVertical="true"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:textColor="#ffffff"
android:text="第三个Item"
android:layout_toRightOf="@id/id_img3"
android:layout_marginLeft="20dp"
android:layout_centerVertical="true"
/>
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<ImageView
android:id="@+id/id_img4"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_marginLeft="20dp"
android:layout_marginTop="20dp"
android:src="@drawable/img_4"
android:layout_centerVertical="true"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:textColor="#ffffff"
android:text="第四个Item"
android:layout_toRightOf="@id/id_img4"
android:layout_marginLeft="20dp"
android:layout_centerVertical="true"
/>
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<ImageView
android:id="@+id/id_img5"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_marginLeft="20dp"
android:layout_marginTop="20dp"
android:src="@drawable/img_5"
android:layout_centerVertical="true"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:textColor="#ffffff"
android:text="第五个Item"
android:layout_toRightOf="@id/id_img5"
android:layout_marginLeft="20dp"
android:layout_centerVertical="true"
/>
</RelativeLayout>
</LinearLayout>
</RelativeLayout>
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原文地址：http://blog.csdn.net/ly2072925694/article/details/51930689
