首先我们看下面视图：
这种效果大家都不陌生，网上好多都说是仿人人网的，估计人家牛逼出来的早吧，我也参考了一一些例子，实现起来有三种方法，我下面简单介绍下：
方法一：其实就是对GestureDetector手势的应用及布局文件的设计.
布局文件main.xml 采用RelativeLayout布局.
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <LinearLayout android:id="@+id/layout_right" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_marginLeft="50dp" android:orientation="vertical" > <AbsoluteLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="@color/grey21" android:padding="10dp" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="设置" android:textColor="@android:color/background_light" android:textSize="20sp" /> </AbsoluteLayout> <ListView android:id="@+id/lv_set" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1" > </ListView> </LinearLayout> <LinearLayout android:id="@+id/layout_left" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@color/white" android:orientation="vertical" > <RelativeLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="@drawable/nav_bg" > <ImageView android:id="@+id/iv_set" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_alignParentTop="true" android:src="@drawable/nav_setting" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:text="我" android:textColor="@android:color/background_light" android:textSize="20sp" /> </RelativeLayout> <ImageView android:id="@+id/iv_set" android:layout_width="fill_parent" android:layout_height="fill_parent" android:scaleType="fitXY" android:src="@drawable/bg_guide_5" /> </LinearLayout> </RelativeLayout>
ayout_right：这个大布局文件，layout_left:距离左边50dp像素.(我们要移动的是layout_left).
看到这个图我想大家都很清晰了吧，其实:我们就是把layout_left这个布局控件整理向左移动，至于移动多少，就要看layout_right有多宽了。layout_left移动到距离左边的边距就是layout_right的宽及-MAX_WIDTH.相信大家都理解.
布局文件就介绍到这里，下面看代码.
/*** * 初始化view */ void InitView() { layout_left = (LinearLayout) findViewById(R.id.layout_left); layout_right = (LinearLayout) findViewById(R.id.layout_right); iv_set = (ImageView) findViewById(R.id.iv_set); lv_set = (ListView) findViewById(R.id.lv_set); lv_set.setAdapter(new ArrayAdapter<String>(this, R.layout.item, R.id.tv_item, title)); lv_set.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Toast.makeText(MainActivity.this, title[position], 1).show(); } }); layout_left.setOnTouchListener(this); iv_set.setOnTouchListener(this); mGestureDetector = new GestureDetector(this); // 禁用长按监听 mGestureDetector.setIsLongpressEnabled(false); getMAX_WIDTH(); }
这里要对手势进行监听，我想大家都知道怎么做，在这里我要说明一个方法
/*** * 获取移动距离 移动的距离其实就是layout_left的宽度 */ void getMAX_WIDTH() { ViewTreeObserver viewTreeObserver = layout_left.getViewTreeObserver(); // 获取控件宽度 viewTreeObserver.addOnPreDrawListener(new OnPreDrawListener() { @Override public boolean onPreDraw() { if (!hasMeasured) { window_width = getWindowManager().getDefaultDisplay() .getWidth(); RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) layout_left .getLayoutParams(); layoutParams.width = window_width; layout_left.setLayoutParams(layoutParams); MAX_WIDTH = layout_right.getWidth(); Log.v(TAG, "MAX_WIDTH=" + MAX_WIDTH + "width=" + window_width); hasMeasured = true; } return true; } }); }
在这里我们要获取屏幕的宽度，并将屏幕宽度设置给layout_left这个控件，为什么要这么做呢，因为如果不把该控件宽度写死的话，那么系统将认为layout_left会根据不同环境宽度自动适应，也就是说我们通过layout_left.getLayoutParams动态移动该控件的时候，该控件会伸缩而不是移动。描述的有点模糊，大家请看下面示意图就明白了.
我们不为layout_left定义死宽度效果：
getLayoutParams可以很清楚看到，layout_left被向左拉伸了，并不是我们要的效果.
还有一种解决办法就是我们在配置文件中直接把layout_left宽度写死，不过这样不利于开发，因为分辨率的问题.因此就用ViewTreeObserver进行对layout_left设置宽度.
ViewTreeObserver,这个类主要用于对布局文件的监听.强烈建议同学们参考这篇文章 android ViewTreeObserver详细讲解，相信让你对ViewTreeObserver有更一步的了解.
其他的就是对GestureDetector手势的应用，下面我把代码贴出来：
package com.jj.slidingmenu; import android.app.Activity; import android.os.AsyncTask; import android.os.Bundle; import android.util.Log; import android.view.GestureDetector; import android.view.KeyEvent; import android.view.MotionEvent; import android.view.View; import android.view.ViewTreeObserver; import android.view.ViewTreeObserver.OnPreDrawListener; import android.view.Window; import android.view.View.OnTouchListener; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ArrayAdapter; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.RelativeLayout; import android.widget.Toast; import android.widget.LinearLayout.LayoutParams; /*** * 滑动菜单 * * @author jjhappyforever... * */ public class MainActivity extends Activity implements OnTouchListener, GestureDetector.OnGestureListener { private boolean hasMeasured = false;// 是否Measured. private LinearLayout layout_left; private LinearLayout layout_right; private ImageView iv_set; private ListView lv_set; /** 每次自动展开/收缩的范围 */ private int MAX_WIDTH = 0; /** 每次自动展开/收缩的速度 */ private final static int SPEED = 30; private GestureDetector mGestureDetector;// 手势 private boolean isScrolling = false; private float mScrollX; // 滑块滑动距离 private int window_width;// 屏幕的宽度 private String TAG = "jj"; 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" }; /*** * 初始化view */ void InitView() { layout_left = (LinearLayout) findViewById(R.id.layout_left); layout_right = (LinearLayout) findViewById(R.id.layout_right); iv_set = (ImageView) findViewById(R.id.iv_set); lv_set = (ListView) findViewById(R.id.lv_set); lv_set.setAdapter(new ArrayAdapter<String>(this, R.layout.item, R.id.tv_item, title)); lv_set.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Toast.makeText(MainActivity.this, title[position], 1).show(); } }); layout_left.setOnTouchListener(this); iv_set.setOnTouchListener(this); mGestureDetector = new GestureDetector(this); // 禁用长按监听 mGestureDetector.setIsLongpressEnabled(false); getMAX_WIDTH(); } /*** * 获取移动距离 移动的距离其实就是layout_left的宽度 */ void getMAX_WIDTH() { ViewTreeObserver viewTreeObserver = layout_left.getViewTreeObserver(); // 获取控件宽度 viewTreeObserver.addOnPreDrawListener(new OnPreDrawListener() { @Override public boolean onPreDraw() { if (!hasMeasured) { window_width = getWindowManager().getDefaultDisplay() .getWidth(); RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) layout_left .getLayoutParams(); // layoutParams.width = window_width; layout_left.setLayoutParams(layoutParams); MAX_WIDTH = layout_right.getWidth(); Log.v(TAG, "MAX_WIDTH=" + MAX_WIDTH + "width=" + window_width); hasMeasured = true; } return true; } }); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.main); InitView(); } // 返回键 @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (KeyEvent.KEYCODE_BACK == keyCode && event.getRepeatCount() == 0) { RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) layout_left .getLayoutParams(); if (layoutParams.leftMargin < 0) { new AsynMove().execute(SPEED); return false; } } return super.onKeyDown(keyCode, event); } @Override public boolean onTouch(View v, MotionEvent event) { // 松开的时候要判断，如果不到半屏幕位子则缩回去， if (MotionEvent.ACTION_UP == event.getAction() && isScrolling == true) { RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) layout_left .getLayoutParams(); // 缩回去 if (layoutParams.leftMargin < -window_width / 2) { new AsynMove().execute(-SPEED); } else { new AsynMove().execute(SPEED); } } return mGestureDetector.onTouchEvent(event); } @Override public boolean onDown(MotionEvent e) { mScrollX = 0; isScrolling = false; // 将之改为true，不然事件不会向下传递. return true; } @Override public void onShowPress(MotionEvent e) { } /*** * 点击松开执行 */ @Override public boolean onSingleTapUp(MotionEvent e) { RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) layout_left .getLayoutParams(); // 左移动 if (layoutParams.leftMargin >= 0) { new AsynMove().execute(-SPEED); } else { // 右移动 new AsynMove().execute(SPEED); } return true; } /*** * e1 是起点，e2是终点，如果distanceX=e1.x-e2.x>0说明向左滑动。反之亦如此. */ @Override public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { isScrolling = true; mScrollX += distanceX;// distanceX:向左为正，右为负 RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) layout_left .getLayoutParams(); layoutParams.leftMargin -= mScrollX; if (layoutParams.leftMargin >= 0) { isScrolling = false;// 拖过头了不需要再执行AsynMove了 layoutParams.leftMargin = 0; } else if (layoutParams.leftMargin <= -MAX_WIDTH) { // 拖过头了不需要再执行AsynMove了 isScrolling = false; layoutParams.leftMargin = -MAX_WIDTH; } layout_left.setLayoutParams(layoutParams); return false; } @Override public void onLongPress(MotionEvent e) { } @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { return false; } class AsynMove extends AsyncTask<Integer, Integer, Void> { @Override protected Void doInBackground(Integer... params) { int times = 0; if (MAX_WIDTH % Math.abs(params[0]) == 0)// 整除 times = MAX_WIDTH / Math.abs(params[0]); else times = MAX_WIDTH / Math.abs(params[0]) + 1;// 有余数 for (int i = 0; i < times; i++) { publishProgress(params[0]); try { Thread.sleep(Math.abs(params[0])); } catch (InterruptedException e) { e.printStackTrace(); } } return null; } /** * update UI */ @Override protected void onProgressUpdate(Integer... values) { RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) layout_left .getLayoutParams(); // 右移动 if (values[0] > 0) { layoutParams.leftMargin = Math.min(layoutParams.leftMargin + values[0], 0); Log.v(TAG, "移动右" + layoutParams.rightMargin); } else { // 左移动 layoutParams.leftMargin = Math.max(layoutParams.leftMargin + values[0], -MAX_WIDTH); Log.v(TAG, "移动左" + layoutParams.rightMargin); } layout_left.setLayoutParams(layoutParams); } } }
上面代码注释已经很明确，相信大家都看的明白，我就不过多解释了。
效果图：截屏出来有点卡，不过在手机虚拟机上是不卡的.
