156.n1-fragment创建有侧边栏的MainActivity

侧边栏的内容是固定的，主页的内容是变化的，因此不能通过一个xml实现所有的内容，需要使用fragment分别实现侧边栏和主页的内容。

将activity_main.xml设置成FrameLayout，空布局，然后往里面填充Fragment;填同时左侧边栏layout_menu.xml也设置成FrameLayout，空布局，然后往里面填充Fragment.这样可以实现左侧边栏和内容的独立布局。

内容的布局activity_main.xml,然后往空的frameLayout中填充fragment

<?xml version="1.0" encoding="utf-8"?><FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/fl_content"    android:layout_width="match_parent"    android:layout_height="match_parent" >    </FrameLayout>

内容填充的fragment,fragment_content.xml

<?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" >        <!-- 内容栏 --><TextView     android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="内容栏"    /></LinearLayout>

侧边栏的布局left_menu.xml,然后往空的frameLayout中填充fragment

<?xml version="1.0" encoding="utf-8"?><FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/fl_left_menu"    android:layout_width="match_parent"    android:layout_height="match_parent" >    </FrameLayout>

侧边栏填充的fragment,fragment_left_menu.xml

<?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" >    <!-- 侧边栏 --><TextView     android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="侧边栏"    /></LinearLayout>

基类的fragment初始化fragment的生命周期方法BaseFragment.java,处理activity的布局的时候会初始化fragment的布局来填充内容

package com.ldw.news.fragment;import android.app.Activity;import android.os.Bundle;import android.support.v4.app.Fragment;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;/* * fragment的基类 */public abstract class BaseFragment extends Fragment{public Activity mActivity;// fragment创建@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);//获取到activity对象mActivity = getActivity();}// 处理fragment的布局@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {//创建fragement的布局return initViews();}// 依附的activity创建完成@Overridepublic void onActivityCreated(Bundle savedInstanceState) {super.onActivityCreated(savedInstanceState);initData();}// 子类必须实现初始化布局界面的方法public abstract View initViews();// 初始化数据, 可以不实现public void initData() {}}

内容的fragment填充ContentFragment.java

package com.ldw.news.fragment;import com.ldw.news.R;import android.view.View;/* * 主界面 */public class ContentFragment extends BaseFragment{//初始化布局@Overridepublic View initViews() {View view = View.inflate(mActivity, R.layout.fragment_content, null);return view;}}

左侧边栏的填充LeftMenuFragment.java

package com.ldw.news.fragment;import com.ldw.news.R;import android.view.View;/* * 左侧边栏的内容 */public class LeftMenuFragment extends BaseFragment{//初始化布局@Overridepublic View initViews() {View view = View.inflate(mActivity, R.layout.fragment_left_menu, null);return view;}}

MainActivity.java的逻辑，让fragment来填充布局

package com.ldw.news;import android.os.Bundle;import android.support.v4.app.FragmentManager;import android.support.v4.app.FragmentTransaction;import com.jeremyfeinstein.slidingmenu.lib.SlidingMenu;import com.jeremyfeinstein.slidingmenu.lib.app.SlidingFragmentActivity;import com.ldw.news.fragment.ContentFragment;import com.ldw.news.fragment.LeftMenuFragment;/* * 主界面 */public class MainActivity extends SlidingFragmentActivity {private static final String FRAGMENT_LEFT_MENU = "fragment_left_menu";private static final String FRAGMENT_CONTENT = "fragment_content";@Overridepublic void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);                        initView();}private void initView() {setContentView(R.layout.activity_main);        //设置左侧边栏        setBehindContentView(R.layout.left_menu);        //获取侧边栏对象        SlidingMenu slidingMenu = getSlidingMenu();        //设置全屏触摸        slidingMenu.setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN);        //设置预留屏幕的宽度        slidingMenu.setBehindOffset(200);                initFragment();        }/* * 初始化fragment,将fragment填充给布局文件 */private void initFragment() {FragmentManager fm = getSupportFragmentManager();FragmentTransaction transaction = fm.beginTransaction();// 开启事务//左侧边栏用布局替代（填充）//第三个参数就是给fragment取一个名字，可以使用fm.findFragmentByTag(FRAGMENT_LEFT_MENU);transaction.replace(R.id.fl_left_menu, new LeftMenuFragment(),FRAGMENT_LEFT_MENU);// 用fragment替换framelayout//内容的填充transaction.replace(R.id.fl_content, new ContentFragment(),FRAGMENT_CONTENT);transaction.commit();// 提交事务//使用第三个参数// Fragment leftMenuFragment = fm.findFragmentByTag(FRAGMENT_LEFT_MENU);}}