Android开发 侧边滑动菜单栏SlidingMenu结合Fragment

SlidingMenu是一个开源项目， https://github.com/jfeinstein10/SlidingMenu 。功能是创建侧边滑动菜单栏，效果类似人人Android客户端,可点击按钮或是在屏幕上划动来展开，收缩侧边的菜单。下面是Demo效果图:

简单介绍一下：整个demo由三个Fragment,一个Activity组成，菜单一个Fragment,包含两个按钮，在内容区域切换显示FragmentA和FragmentB.
项目用了AndroidAnnotations框架。
MainActivity：

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package com.pocketdigi.slidingmenudemo;   import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity;   import com.googlecode.androidannotations.annotations.AfterViews; import com.googlecode.androidannotations.annotations.EActivity; import com.jeremyfeinstein.slidingmenu.lib.SlidingMenu; import com.pocketdigi.fragment.FragmentA_; import com.pocketdigi.fragment.FragmentB_; import com.pocketdigi.fragment.MenuFragment_;     @EActivity(R.layout.layout_content) public class MainActivity extends FragmentActivity { Fragment fragmentA, fragmentB, menuFragment; SlidingMenu menu;   @AfterViews public void afterViews() { //添加左侧菜单 menuFragment = new MenuFragment_(); menu = new SlidingMenu(this); menu.setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN); menu.setShadowDrawable(R.drawable.shadow); menu.setShadowWidthRes(R.dimen.shadow_width); //设置拉出菜单后，上层内容留下的宽度，即这个宽度＋菜单宽度＝屏幕宽度 menu.setBehindOffsetRes(R.dimen.slidingmenu_offset); //设置隐藏或显示菜单时，菜单渐变值，0，不变，1黑色，值为0－1 menu.setFadeDegree(0f); menu.attachToActivity(this, SlidingMenu.SLIDING_CONTENT); menu.setMenu(R.layout.layout_menu);   getSupportFragmentManager().beginTransaction() .replace(R.id.layout_menu, menuFragment).commit();   //显示FragmentA showFragmentA(); }   /** * 捕捉返回键，如果当前显示菜单，刚隐藏 */ @Override public void onBackPressed() { if (menu.isMenuShowing()) { menu.showContent(); } else { super.onBackPressed(); } }   public void showFragmentA() { if(fragmentA==null) { fragmentA = new FragmentA_(); } if(!fragmentA.isVisible()) { getSupportFragmentManager().beginTransaction() .replace(R.id.layout_content, fragmentA).commit(); } menu.showContent(true); }   public void showFragmentB() { if(fragmentB==null) { fragmentB = new FragmentB_(); } if(!fragmentB.isVisible()) { getSupportFragmentManager().beginTransaction() .replace(R.id.layout_content, fragmentB).commit(); } menu.showContent(true); }     }

MenuFragment.java:

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package com.pocketdigi.fragment;   import android.support.v4.app.Fragment; import android.widget.Button;   import com.googlecode.androidannotations.annotations.AfterViews; import com.googlecode.androidannotations.annotations.Click; import com.googlecode.androidannotations.annotations.EFragment; import com.googlecode.androidannotations.annotations.ViewById; import com.pocketdigi.slidingmenudemo.MainActivity; import com.pocketdigi.slidingmenudemo.R;   @EFragment(R.layout.fragment_menu) public class MenuFragment extends Fragment { @ViewById Button btn_fragmentA,btn_fragmentB; MainActivity mainActivity;   @AfterViews public void afterViews() { mainActivity=(MainActivity)getActivity(); }   @Click public void btn_fragmentA() { mainActivity.showFragmentA(); } @Click public void btn_fragmentB() { mainActivity.showFragmentB(); } }