左右滑出菜单 Android左右滑出菜单实例分析

时间:2021-03-18 人气:0

想了解Android左右滑出菜单实例分析的相关内容吗，在本文为您仔细讲解左右滑出菜单的相关知识和一些Code实例，欢迎阅读和指正，我们先划重点：左右滑出,菜单，下面大家一起来学习吧。

现在的Android应用，只要有一个什么新的创意，过不了多久，几乎所有的应用都带这个创意。这不，咱们公司最近的一个持续性的项目，想在首页加个从左滑动出来的菜单，我查阅网上资料，并自己摸索，实现了左、右两边都能滑出菜单，并且，左、右菜单中，都可以加ListView等这类需要解决GestureDetector冲突的问题（如在首页面中，含有ListView，上下滚动时，左右不动，相反，左右滑动菜单时，上下不动，听着头就大了吧！）

先上几张图，给大家瞧瞧，对整体有个了解：

一、首页布局：

复制代码代码如下:

 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
tools:context=".MainActivity" > 
<!-- 主布局 --> 
<RelativeLayout 
android:id="@+id/mainLayout" 
android:layout_width="match_parent" 
android:layout_height="match_parent"> 
<RelativeLayout 
android:id="@+id/titlebar" 
android:layout_width="match_parent" 
android:layout_height="wrap_content" 
android:background="#ffffff" 
android:padding="5dip"> 
<ImageView 
android:id="@+id/ivMore" 
android:src="@drawable/nav_more_normal" 
android:contentDescription="@string/img_desc" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:layout_centerVertical="true" 
android:layout_alignParentLeft="true" 
android:layout_marginLeft="10dip"/> 
<TextView 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:layout_centerHorizontal="true" 
android:layout_centerVertical="true" 
android:text="@string/title" 
android:textSize="20sp" 
android:textColor="#000000"/> 
<ImageView 
android:id="@+id/ivSettings" 
android:src="@drawable/nav_setting_normal" 
android:contentDescription="@string/img_desc" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:layout_centerVertical="true" 
android:layout_alignParentRight="true" 
android:layout_marginRight="10dip"/> 
</RelativeLayout> 

<ImageView 
android:src="@drawable/picture" 
android:contentDescription="@string/img_desc" 
android:scaleType="fitXY" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:layout_below="@id/titlebar"/> 
</RelativeLayout> 
<!-- 左侧菜单导航 --> 
<RelativeLayout 
android:id="@+id/leftLayout" 
android:layout_width="140dip" 
android:layout_height="match_parent" 
android:background="#000000"> 
<RelativeLayout 
android:id="@+id/leftTitlebar" 
android:layout_width="match_parent" 
android:layout_height="wrap_content" 
android:background="@color/grey21" 
android:padding="5dip"> 
<TextView 
android:layout_marginLeft="5dip" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:layout_alignParentLeft="true" 
android:layout_centerVertical="true" 
android:text="@string/leftNav" 
android:textSize="20sp" 
android:textColor="#ffffff"/> 
</RelativeLayout> 
<com.chris.lr.slidemenu.LayoutRelative 
android:id="@+id/layoutSlideMenu" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:layout_below="@id/leftTitlebar"> 
<ListView 
android:id="@+id/listMore" 
android:cacheColorHint="#00000000" 
android:layout_width="match_parent" 
android:layout_height="match_parent"/> 
</com.chris.lr.slidemenu.LayoutRelative> 
</RelativeLayout> 
<!-- 右侧菜单导航 --> 
<RelativeLayout 
android:id="@+id/rightLayout" 
android:layout_width="140dip" 
android:layout_height="match_parent" 
android:background="#000000"> 
<RelativeLayout 
android:id="@+id/rightTitlebar" 
android:layout_width="match_parent" 
android:layout_height="wrap_content" 
android:background="@color/gold" 
android:padding="5dip"> 
<TextView 
android:layout_marginLeft="5dip" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:layout_alignParentLeft="true" 
android:layout_centerVertical="true" 
android:text="@string/right_title" 
android:textSize="20sp" 
android:textColor="#ffffff"/> 
</RelativeLayout> 

<TextView 
android:text="@string/rightNav" 
android:textColor="#ff00ff" 
android:textSize="18sp" 
android:layout_width="match_parent" 
android:layout_height="30dip" 
android:layout_below="@id/rightTitlebar" 
android:background="#000000"/> 
</RelativeLayout> 
</RelativeLayout> 

布局很简单，我个人比较推荐用RelativeLayout，因为这个是几个Layout中，性能最好的，而LinearLayout则不好，原因在于，某个子视图的宽高变动，会引起这个布局中其它地方也需要重新调整。

布局中，有com.chris.lr.slidemenu.LayoutRelative这个自定义控件是继承RelativeLayout的，里面只是加了些手势的处理，它的作用实际上就是最开始讲到的，如果含有ListView这类需要判断手势的，则就用到它，先由它来判断，然后在视情况是否拦截由自己来处理。

二、自定义控件：

复制代码代码如下:

 
package com.chris.lr.slidemenu; 
import android.content.Context; 
import android.util.AttributeSet; 
import android.util.Log; 
import android.view.GestureDetector; 
import android.view.GestureDetector.SimpleOnGestureListener; 
import android.view.MotionEvent; 
import android.widget.RelativeLayout; 
public class LayoutRelative extends RelativeLayout { 
private static final String TAG = "ChrisSlideMenu"; 
private GestureDetector mGestureDetector; 
private boolean bLockScrollX = false; 
private boolean bTouchIntercept = false; 

private OnScrollListener mOnScrollListenerCallback = null; 

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

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

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

mGestureDetector = new GestureDetector(new LayoutGestureListener()); 
} 

/** 
* 设置滚动监听接口 
* @param l 
*/ 
public void setOnScrollListener(OnScrollListener l){ 
mOnScrollListenerCallback = l; 
} 

/* 
* Progress: 
* 1. 重载dispatchTouchEvent，将消息传递给GestureDetector; 
* 2. 重载手势中onDown 和 onScroll两个函数; 
* 3. 在onDown中，默认对水平滚动方向加锁; 
* 4. 在onScroll中，判断e1与e2的水平方向与垂直方向距离: 
* a. 如果垂直方向大，则表明是上下滚动，且返回false表明当前手势不用拦截； 
* b. 如果水平方向大，则表明是左右滚动，且返回true表明当前手势需要拦截； 
* 5. 重载onInterceptTouchEvent，如果手势返回为true，则onInterceptTouchEvent也返回true； 
* 6. 如果要拦截手势消息，则需要重载onTouchEvent，或子视图中重载这个函数，来处理这条消息； 
* 7. 如果自己处理，则对水平方向滚动去锁(表明当前用户想左右滚动)； 
* 
* ---------- 
* ---------------------- ------>| onDown | 
* | | | ---------- 
* | dispatchTouchEvent | <---- ------ false: 上下滚动 
* | | | ------------ / 
* ---------------------- ------>| onScroll | ---- 
* | ------------ \ 
* | ------ true : 左右滚动 
* | intercept = true ---------------- 
* |----------------------| onTouchEvent | 
* | ---------------- 
* ------------------------- 
* | | 
* | onInterceptTouchEvent | 
* | | 
* ------------------------- 
* 
*/ 
@Override 
public boolean dispatchTouchEvent(MotionEvent ev) { 
bTouchIntercept = mGestureDetector.onTouchEvent(ev); 

if(MotionEvent.ACTION_UP == ev.getAction() && !bLockScrollX){ 
if(mOnScrollListenerCallback != null){ 
mOnScrollListenerCallback.doOnRelease(); 
} 
} 

return super.dispatchTouchEvent(ev); 
} 

// viewgroup.onInterceptTouchEvent 
@Override 
public boolean onInterceptTouchEvent(MotionEvent ev) { 
super.onInterceptTouchEvent(ev); 
return bTouchIntercept; 
} 
// view.onTouchEvent 
@Override 
public boolean onTouchEvent(MotionEvent event) { 
bLockScrollX = false; 
return super.onTouchEvent(event); 
} 
/** 
* @author cheng.yang 
* 
* 自定义手势监听 
*/ 
public class LayoutGestureListener extends SimpleOnGestureListener { 
@Override 
public boolean onDown(MotionEvent e) { 
bLockScrollX = true; 
return super.onDown(e); 
} 
@Override 
public boolean onScroll(MotionEvent e1, MotionEvent e2, 
float distanceX, float distanceY) { 
if(!bLockScrollX){ 
if(mOnScrollListenerCallback != null){ 
mOnScrollListenerCallback.doOnScroll(e1, e2, distanceX, distanceY); 
} 
} 

if(Math.abs(e1.getY() - e2.getY()) > Math.abs(e1.getX() - e2.getX())){ 
return false; 
}else{ 
return true; 
} 
} 
} 

public interface OnScrollListener { 
void doOnScroll(MotionEvent e1, MotionEvent e2, 
float distanceX, float distanceY); 
void doOnRelease(); 
} 
} 

这个控件中，含有一个接口，当用户手势为左右时，则需要将滚动数据回传到主视图中去处理，而自己拦截不往下传递消息。里面有个消息流程图，讲的比较详细了，大家可以先看看，有什么问题，可以问我。
三、MainActivity的实现：
这个需要着讲解，毕竟，左、右滑动的实现都在这里。

复制代码代码如下:

 
/** 
* 
* @author cheng.yang 
* 
* 左、右菜单滑出 
* 
* params[0]: 滑动距离 
* params[1]: 滑动速度,带方向 
*/ 
public class SlideMenu extends AsyncTask<Integer, Integer, Void>{ 
@Override 
protected Void doInBackground(Integer... params) { 
if(params.length != 2){ 
Log.e(TAG, "error, params must have 2!"); 
} 
int times = params[0] / Math.abs(params[1]); 
if(params[0] % Math.abs(params[1]) != 0){ 
times ++; 
} 

for(int i = 0; i < times; i++){ 
this.publishProgress(params[0], params[1], i+1); 
} 

return null; 
} 
@Override 
protected void onProgressUpdate(Integer... values) { 
if(values.length != 3){ 
Log.e(TAG, "error, values must have 3!"); 
} 
int distance = Math.abs(values[1]) * values[2]; 
int delta = values[0] - distance; 
int leftMargin = 0; 
if(values[1] < 0){ // 左移 
leftMargin = (delta > 0 ? values[1] : -(Math.abs(values[1]) - Math.abs(delta))); 
}else{ 
leftMargin = (delta > 0 ? values[1] : (Math.abs(values[1]) - Math.abs(delta))); 
} 

rollLayout(leftMargin); 
} 

首先，自定义一个继承于AsyncTask的类的线程，这个自定义类，就是用来实现动画效果，重在“滑动”，而不是硬生生的挤出来。关于AsyncTask的用法，大家可以看我的博客中关于它的讲解：
http://blog.csdn.net/qingye_love/article/details/8777508
自定义类的使用需要两个参数，一个是滑动的距离，一个是每次滑动多少且向哪个方向滑动：
1. 滑动距离：若是左侧菜单滑出来，距离就是左侧菜单的宽度；同理，右侧滑出就是右侧菜单的宽度；
2. 滑动速度：即动画滑动时，向哪个方向，且每次滑动多少像素；
在doInBackground中，计算需要滑动多少次，然后用for循环调用publishProgress，实际上就是调用的onProgressUpdate，在onProgressUpdate中，根据方向，以及当前main layout的 leftMargin来计算是滑动指定的距离（速度），还是当终点距离小于滑动速度时，速度就为终点距离，最终，调用rollLayout，来修改 leftLayout, mainLayout, rightLayout三者的布局，达到滑动的效果。
rollLayout的实现：

复制代码代码如下:

 
private void rollLayout(int margin){ 
RelativeLayout.LayoutParams lp = (LayoutParams) mainLayout.getLayoutParams(); 
lp.leftMargin += margin; 
lp.rightMargin -= margin; 
mainLayout.setLayoutParams(lp); 
lp = (LayoutParams) leftLayout.getLayoutParams(); 
lp.leftMargin += margin; 
leftLayout.setLayoutParams(lp); 
lp = (LayoutParams) rightLayout.getLayoutParams(); 
lp.leftMargin += margin; 
lp.rightMargin -= margin; 
rightLayout.setLayoutParams(lp); 
} 

这个就是修改三个layout的leftMargin和rightMargin。
初始化布局控件：

复制代码代码如下:

 
private void initView(){ 
mainLayout = (RelativeLayout) findViewById(R.id.mainLayout); 
leftLayout = (RelativeLayout) findViewById(R.id.leftLayout); 
rightLayout = (RelativeLayout) findViewById(R.id.rightLayout); 
mainLayout.setOnTouchListener(this); 
leftLayout.setOnTouchListener(this); 
rightLayout.setOnTouchListener(this); 

layoutSlideMenu = (LayoutRelative) findViewById(R.id.layoutSlideMenu); 
layoutSlideMenu.setOnScrollListener(new OnScrollListener(){ 
@Override 
public void doOnScroll(MotionEvent e1, MotionEvent e2, 
float distanceX, float distanceY) { 
onScroll(distanceX); 
} 

@Override 
public void doOnRelease(){ 
onRelease(); 
} 
}); 

ivMore = (ImageView) findViewById(R.id.ivMore); 
ivSettings = (ImageView) findViewById(R.id.ivSettings); 
ivMore.setOnTouchListener(this); 
ivSettings.setOnTouchListener(this); 

mListMore = (ListView) findViewById(R.id.listMore); 
mListMore.setAdapter(new ArrayAdapter<String>(this, R.layout.item, R.id.tv_item, title)); 
mListMore.setOnItemClickListener(this); 

mGestureDetector = new GestureDetector(this); 
mGestureDetector.setIsLongpressEnabled(false); 

resizeLayout(); 
} 

调整三个layout，将leftLayout移动到屏幕最左边之外，现时将rightLayout移动到屏幕最右边之外：

复制代码代码如下:

 
/* 
* 使用leftMargin及rightMargin防止layout被挤压变形 
* Math.abs(leftMargin - rightMargin) = layout.width 
*/ 
private void resizeLayout(){ 
DisplayMetrics dm = getResources().getDisplayMetrics(); 

// 固定 main layout, 防止被左、右挤压变形 
RelativeLayout.LayoutParams lp = (LayoutParams) mainLayout.getLayoutParams(); 
lp.width = dm.widthPixels; 
mainLayout.setLayoutParams(lp); 

// 将左layout调整至main layout左边 
lp = (LayoutParams) leftLayout.getLayoutParams(); 
lp.leftMargin = -lp.width; 
leftLayout.setLayoutParams(lp); 
Log.d(TAG, "left l.margin = " + lp.leftMargin); 

// 将左layout调整至main layout右边 
lp = (LayoutParams) rightLayout.getLayoutParams(); 
lp.leftMargin = dm.widthPixels; 
lp.rightMargin = -lp.width; 
rightLayout.setLayoutParams(lp); 
Log.d(TAG, "right l.margin = " + lp.leftMargin); 
} 

重载onTouch，处理消息：

复制代码代码如下:

 
////////////////////////////// onTouch /////////////////////////////// 
@Override 
public boolean onTouch(View v, MotionEvent event) { 
mClickedView = v; 

if(MotionEvent.ACTION_UP == event.getAction() && bIsScrolling){ 
onRelease(); 
} 

return mGestureDetector.onTouchEvent(event); 
} 

记录选择的view，并将消息传给GestureDetector；
重载GestureDetector的onDown, onScroll, onSingleTapUp这三个是主要的，其它的重载不做任何修改；

复制代码代码如下:

 
/////////////////// GestureDetector Override Begin /////////////////// 
@Override 
public boolean onDown(MotionEvent e) { 

bIsScrolling = false; 
mScroll = 0; 
iLimited = 0; 
RelativeLayout.LayoutParams lp = (LayoutParams) mainLayout.getLayoutParams(); 
if(lp.leftMargin > 0){ 
iLimited = 1; 
}else if(lp.leftMargin < 0){ 
iLimited = -1; 
} 

return true; 
} 

在onDown中，判断当前的 mainLayout 的 leftMargin 的值，并用 iLimited 记录下来，原因：
如果当前显示的是左侧菜单，则用户滚动屏幕时，最多只是将左侧菜单滑出到屏幕外，而不会继续滑动，将右侧菜单显示出来；同理，当前已经显示了右侧菜单。

复制代码代码如下:

 
@Override 
public boolean onSingleTapUp(MotionEvent e) { 
/* 
* 正常情况下，mainLayout的leftMargin为0, 
* 当左/右菜单为打开中，此时就不为0，需要判断 
*/ 
if(mClickedView != null){ 
RelativeLayout.LayoutParams lp = (LayoutParams) mainLayout.getLayoutParams(); 

if(mClickedView == ivMore){ 
Log.d(TAG, "[onSingleTapUp] ivMore clicked! leftMargin = " + lp.leftMargin); 

if(lp.leftMargin == 0){ 
new SlideMenu().execute(leftLayout.getLayoutParams().width, SPEED); 
}else{ 
new SlideMenu().execute(leftLayout.getLayoutParams().width, -SPEED); 
} 
}else if(mClickedView == ivSettings){ 
Log.d(TAG, "[onSingleTapUp] ivSettings clicked! leftMargin = " + lp.leftMargin); 

if(lp.leftMargin == 0){ 
new SlideMenu().execute(rightLayout.getLayoutParams().width, -SPEED); 
}else{ 
new SlideMenu().execute(rightLayout.getLayoutParams().width, SPEED); 
} 
}else if(mClickedView == mainLayout){ 
Log.d(TAG, "[onSingleTapUp] mainLayout clicked!"); 
} 
} 
return true; 
} 

这个函数中，处理标题栏左、右两个按钮，点击一次，显示侧导航菜单，再点击一次，则关闭。

复制代码代码如下:

 
@Override 
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, 
float distanceY) { 
onScroll(distanceX); 
return false; 
} 

滚动处理，直接将本次的水平滚动距离传给onScroll函数来处理，因为，侧边导航菜单的水平滚动也将通过OnScrollListener.doOnScroll来回调，所以，写个通用函数。

复制代码代码如下:

 
private void onScroll(float distanceX){ 
bIsScrolling = true; 
mScroll += distanceX; // 向左为正 
Log.d(TAG, "mScroll = " + mScroll + ", distanceX = " + distanceX); 

RelativeLayout.LayoutParams lp = (LayoutParams) mainLayout.getLayoutParams(); 
RelativeLayout.LayoutParams lpLeft = (LayoutParams) leftLayout.getLayoutParams(); 
RelativeLayout.LayoutParams lpRight = (LayoutParams) rightLayout.getLayoutParams(); 
Log.d(TAG, "lp.leftMargin = " + lp.leftMargin); 

int distance = 0; 
if(mScroll > 0){ // 向左移动 
if(lp.leftMargin <= 0){ // 打开右导航菜单 
if(iLimited > 0){ 
return; 
} 
distance = lpRight.width - Math.abs(lp.leftMargin); 
}else if(lp.leftMargin > 0){ // 关闭左导航菜单 
distance = lp.leftMargin; 
} 
if(mScroll >= distance){ 
mScroll = distance; 
} 
}else if(mScroll < 0){ // 向右移动 
if(lp.leftMargin >= 0){ // 打开左导航菜单 
if(iLimited < 0){ 
return; 
} 
distance = lpLeft.width - Math.abs(lp.leftMargin); 
}else if(lp.leftMargin < 0){ // 关闭右导航菜单 
distance = Math.abs(lp.leftMargin); 
} 
if(mScroll <= -distance){ 
mScroll = -distance; 
} 
} 
Log.d(TAG, "mScroll = " + mScroll); 
if(mScroll != 0){ 
rollLayout(-mScroll); 
} 
} 

接下来，我们看看当侧边导航菜单，水平滚动且用户松开手指时，回调OnScrollListener.doOnRelease，我们会调用一个onRelease来负责处理收尾工作：

复制代码代码如下:

 
private void onRelease(){ 
RelativeLayout.LayoutParams lp = (LayoutParams) mainLayout.getLayoutParams(); 
if(lp.leftMargin < 0){ // 左移 
/* 
* 左移大于右导航宽度一半，则自动展开,否则自动缩回去 
*/ 
if(Math.abs(lp.leftMargin) > rightLayout.getLayoutParams().width/2){ 
new SlideMenu().execute(rightLayout.getLayoutParams().width - Math.abs(lp.leftMargin), -SPEED); 
}else{ 
new SlideMenu().execute(Math.abs(lp.leftMargin), SPEED); 
} 
}else if(lp.leftMargin > 0){ 
/* 
* 右移大于左导航宽度一半，则自动展开,否则自动缩回去 
*/ 
if(Math.abs(lp.leftMargin) > leftLayout.getLayoutParams().width/2){ 
new SlideMenu().execute(leftLayout.getLayoutParams().width - Math.abs(lp.leftMargin), SPEED); 
}else{ 
new SlideMenu().execute(Math.abs(lp.leftMargin), -SPEED); 
} 
} 
} 

主要的代码块已经讲解完了，下面是完整的代码：

复制代码代码如下:

 
package com.chris.lr.slidemenu; 
import com.chris.lr.slidemenu.LayoutRelative.OnScrollListener; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.util.DisplayMetrics; 
import android.util.Log; 
import android.view.GestureDetector; 
import android.view.GestureDetector.OnGestureListener; 
import android.view.KeyEvent; 
import android.view.MotionEvent; 
import android.view.View; 
import android.view.View.OnTouchListener; 
import android.view.Window; 
import android.widget.AdapterView; 
import android.widget.AdapterView.OnItemClickListener; 
import android.widget.ArrayAdapter; 
import android.widget.ImageView; 
import android.widget.ListView; 
import android.widget.RelativeLayout; 
import android.widget.Toast; 
import android.widget.RelativeLayout.LayoutParams; 
import android.app.Activity; 
public class MainActivity extends Activity implements OnGestureListener, 
OnTouchListener, OnItemClickListener { 
private static final String TAG = "ChrisSlideMenu"; 
private RelativeLayout mainLayout; 
private RelativeLayout leftLayout; 
private RelativeLayout rightLayout; 
private LayoutRelative layoutSlideMenu; 
private ListView mListMore; 

private ImageView ivMore; 
private ImageView ivSettings; 
private GestureDetector mGestureDetector; 

private static final int SPEED = 30; 
private boolean bIsScrolling = false; 
private int iLimited = 0; 
private int mScroll = 0; 
private View mClickedView = null; 

private String title[] = {"待发送队列", 
"同步分享设置", 
"编辑我的资料", 
"找朋友", 
"告诉朋友", 
"节省流量", 
"推送设置", 
"版本更新", 
"意见反馈", 
"积分兑换", 
"精品应用", 
"常见问题", 
"退出当前帐号", 
"退出1", 
"退出2", 
"退出3", 
"退出4"}; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
this.requestWindowFeature(Window.FEATURE_NO_TITLE); 
setContentView(R.layout.activity_main); 
initView(); 
} 

private void initView(){ 
mainLayout = (RelativeLayout) findViewById(R.id.mainLayout); 
leftLayout = (RelativeLayout) findViewById(R.id.leftLayout); 
rightLayout = (RelativeLayout) findViewById(R.id.rightLayout); 
mainLayout.setOnTouchListener(this); 
leftLayout.setOnTouchListener(this); 
rightLayout.setOnTouchListener(this); 

layoutSlideMenu = (LayoutRelative) findViewById(R.id.layoutSlideMenu); 
layoutSlideMenu.setOnScrollListener(new OnScrollListener(){ 
@Override 
public void doOnScroll(MotionEvent e1, MotionEvent e2, 
float distanceX, float distanceY) { 
onScroll(distanceX); 
} 

@Override 
public void doOnRelease(){ 
onRelease(); 
} 
}); 

ivMore = (ImageView) findViewById(R.id.ivMore); 
ivSettings = (ImageView) findViewById(R.id.ivSettings); 
ivMore.setOnTouchListener(this); 
ivSettings.setOnTouchListener(this); 

mListMore = (ListView) findViewById(R.id.listMore); 
mListMore.setAdapter(new ArrayAdapter<String>( 
this, R.layout.item, R.id.tv_item, title)); 
mListMore.setOnItemClickListener(this); 

mGestureDetector = new GestureDetector(this); 
mGestureDetector.setIsLongpressEnabled(false); 

resizeLayout(); 
} 

/* 
* 使用leftMargin及rightMargin防止layout被挤压变形 
* Math.abs(leftMargin - rightMargin) = layout.width 
*/ 
private void resizeLayout(){ 
DisplayMetrics dm = getResources().getDisplayMetrics(); 

// 固定 main layout, 防止被左、右挤压变形 
RelativeLayout.LayoutParams lp = 
(LayoutParams) mainLayout.getLayoutParams(); 
lp.width = dm.widthPixels; 
mainLayout.setLayoutParams(lp); 

// 将左layout调整至main layout左边 
lp = (LayoutParams) leftLayout.getLayoutParams(); 
lp.leftMargin = -lp.width; 
leftLayout.setLayoutParams(lp); 
Log.d(TAG, "left l.margin = " + lp.leftMargin); 

// 将左layout调整至main layout右边 
lp = (LayoutParams) rightLayout.getLayoutParams(); 
lp.leftMargin = dm.widthPixels; 
lp.rightMargin = -lp.width; 
rightLayout.setLayoutParams(lp); 
Log.d(TAG, "right l.margin = " + lp.leftMargin); 
} 

@Override 
public boolean onKeyDown(int keyCode, KeyEvent event) { 
if(keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0){ 
RelativeLayout.LayoutParams lp = 
(LayoutParams) mainLayout.getLayoutParams(); 

if(lp.leftMargin != 0){ 
if(lp.leftMargin > 0){ 
new SlideMenu().execute( 
leftLayout.getLayoutParams().width, -SPEED); 
}else if(lp.leftMargin < 0){ 
new SlideMenu().execute( 
rightLayout.getLayoutParams().width, SPEED); 
} 
return true; 
} 
} 
return super.onKeyDown(keyCode, event); 
} 

private void rollLayout(int margin){ 
RelativeLayout.LayoutParams lp = 
(LayoutParams) mainLayout.getLayoutParams(); 
lp.leftMargin += margin; 
lp.rightMargin -= margin; 
mainLayout.setLayoutParams(lp); 
lp = (LayoutParams) leftLayout.getLayoutParams(); 
lp.leftMargin += margin; 
leftLayout.setLayoutParams(lp); 
lp = (LayoutParams) rightLayout.getLayoutParams(); 
lp.leftMargin += margin; 
lp.rightMargin -= margin; 
rightLayout.setLayoutParams(lp); 
} 
private void onScroll(float distanceX){ 
bIsScrolling = true; 
mScroll += distanceX; // 向左为正 
Log.d(TAG, "mScroll = " + mScroll + ", distanceX = " + distanceX); 

RelativeLayout.LayoutParams lp = 
(LayoutParams) mainLayout.getLayoutParams(); 
RelativeLayout.LayoutParams lpLeft = 
(LayoutParams) leftLayout.getLayoutParams(); 
RelativeLayout.LayoutParams lpRight = 
(LayoutParams) rightLayout.getLayoutParams(); 
Log.d(TAG, "lp.leftMargin = " + lp.leftMargin); 

int distance = 0; 
if(mScroll > 0){ // 向左移动 
if(lp.leftMargin <= 0){ // 打开右导航菜单 
if(iLimited > 0){ 
return; 
} 
distance = lpRight.width - Math.abs(lp.leftMargin); 
}else if(lp.leftMargin > 0){ // 关闭左导航菜单 
distance = lp.leftMargin; 
} 
if(mScroll >= distance){ 
mScroll = distance; 
} 
}else if(mScroll < 0){ // 向右移动 
if(lp.leftMargin >= 0){ // 打开左导航菜单 
if(iLimited < 0){ 
return; 
} 
distance = lpLeft.width - Math.abs(lp.leftMargin); 
}else if(lp.leftMargin < 0){ // 关闭右导航菜单 
distance = Math.abs(lp.leftMargin); 
} 
if(mScroll <= -distance){ 
mScroll = -distance; 
} 
} 
Log.d(TAG, "mScroll = " + mScroll); 
if(mScroll != 0){ 
rollLayout(-mScroll); 
} 
} 

private void onRelease(){ 
RelativeLayout.LayoutParams lp = 
(LayoutParams) mainLayout.getLayoutParams(); 
if(lp.leftMargin < 0){ // 左移 
/* 
* 左移大于右导航宽度一半，则自动展开,否则自动缩回去 
*/ 
if(Math.abs(lp.leftMargin) > rightLayout.getLayoutParams().width/2){ 
new SlideMenu().execute(rightLayout.getLayoutParams().width - 
Math.abs(lp.leftMargin), -SPEED); 
}else{ 
new SlideMenu().execute(Math.abs(lp.leftMargin), SPEED); 
} 
}else if(lp.leftMargin > 0){ 
/* 
* 右移大于左导航宽度一半，则自动展开,否则自动缩回去 
*/ 
if(Math.abs(lp.leftMargin) > leftLayout.getLayoutParams().width/2){ 
new SlideMenu().execute(leftLayout.getLayoutParams().width - 
Math.abs(lp.leftMargin), SPEED); 
}else{ 
new SlideMenu().execute(Math.abs(lp.leftMargin), -SPEED); 
} 
} 
} 
///////////////////// ListView.onItemClick /////////////////////// 
@Override 
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { 
Toast.makeText(this, title[arg2], Toast.LENGTH_SHORT).show(); 
} 

////////////////////////////// onTouch /////////////////////////////// 
@Override 
public boolean onTouch(View v, MotionEvent event) { 
mClickedView = v; 

if(MotionEvent.ACTION_UP == event.getAction() && bIsScrolling){ 
onRelease(); 
} 

return mGestureDetector.onTouchEvent(event); 
} 

/////////////////// GestureDetector Override Begin /////////////////// 
@Override 
public boolean onDown(MotionEvent e) { 

bIsScrolling = false; 
mScroll = 0; 
iLimited = 0; 
RelativeLayout.LayoutParams lp = 
(LayoutParams) mainLayout.getLayoutParams(); 
if(lp.leftMargin > 0){ 
iLimited = 1; 
}else if(lp.leftMargin < 0){ 
iLimited = -1; 
} 

return true; 
} 
@Override 
public boolean onFling(MotionEvent arg0, MotionEvent arg1, float arg2, 
float arg3) { 
return false; 
} 
@Override 
public void onLongPress(MotionEvent e) { 

} 
@Override 
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, 
float distanceY) { 
onScroll(distanceX); 
return false; 
} 
@Override 
public void onShowPress(MotionEvent arg0) { 

} 
@Override 
public boolean onSingleTapUp(MotionEvent e) { 
/* 
* 正常情况下，mainLayout的leftMargin为0, 
* 当左/右菜单为打开中，此时就不为0，需要判断 
*/ 
if(mClickedView != null){ 
RelativeLayout.LayoutParams lp = 
(LayoutParams) mainLayout.getLayoutParams(); 

if(mClickedView == ivMore){ 
Log.d(TAG, "[onSingleTapUp] ivMore clicked! leftMargin = " 
+ lp.leftMargin); 

if(lp.leftMargin == 0){ 
new SlideMenu().execute( 
leftLayout.getLayoutParams().width, SPEED); 
}else{ 
new SlideMenu().execute( 
leftLayout.getLayoutParams().width, -SPEED); 
} 
}else if(mClickedView == ivSettings){ 
Log.d(TAG, "[onSingleTapUp] ivSettings clicked! leftMargin = " 
+ lp.leftMargin); 

if(lp.leftMargin == 0){ 
new SlideMenu().execute( 
rightLayout.getLayoutParams().width, -SPEED); 
}else{ 
new SlideMenu().execute( 
rightLayout.getLayoutParams().width, SPEED); 
} 
}else if(mClickedView == mainLayout){ 
Log.d(TAG, "[onSingleTapUp] mainLayout clicked!"); 
} 
} 
return true; 
} 
/////////////////// GestureDetector Override End /////////////////// 

/** 
* 
* @author cheng.yang 
* 
* 左、右菜单滑出 
* 
* params[0]: 滑动距离 
* params[1]: 滑动速度,带方向 
*/ 
public class SlideMenu extends AsyncTask<Integer, Integer, Void>{ 
@Override 
protected Void doInBackground(Integer... params) { 
if(params.length != 2){ 
Log.e(TAG, "error, params must have 2!"); 
} 
int times = params[0] / Math.abs(params[1]); 
if(params[0] % Math.abs(params[1]) != 0){ 
times ++; 
} 

for(int i = 0; i < times; i++){ 
this.publishProgress(params[0], params[1], i+1); 
} 

return null; 
} 
@Override 
protected void onProgressUpdate(Integer... values) { 
if(values.length != 3){ 
Log.e(TAG, "error, values must have 3!"); 
} 
int distance = Math.abs(values[1]) * values[2]; 
int delta = values[0] - distance; 
int leftMargin = 0; 
if(values[1] < 0){ // 左移 
leftMargin = (delta > 0 ? values[1] : 
-(Math.abs(values[1]) - Math.abs(delta))); 
}else{ 
leftMargin = (delta > 0 ? values[1] : 
(Math.abs(values[1]) - Math.abs(delta))); 
} 

rollLayout(leftMargin); 
} 
} 
} 

总结：
本文左，右滑出菜单的原理，就是用到了leftMargin和rightMargin两个属性，并配合几个GestureDetector来完全手势判断的逻辑处理，其中，自定义的那个控件布局LayoutRelative，可以用在任何子视图中需要处理上下，左右滚动冲突的地方，良好的解决了冲突问题。
完整的代码下载地址：
http://download.csdn.net/detail/qingye_love/5237799
希望大家多来聊聊，同时，大家可以在我的基础上，实现onFling的方法，欢迎交流。

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