設置主布局文件，為根布局設置一個id，作為內容區

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給ListView的條目設置點擊事件，setOnItemClickListener()方法，參數：上下文

當前的Fragment實現OnItemClickListener接口

實現onItemClick()方法

switch判斷一下當前菜單的索引位置，根據索引來實例化不同的Fragment對象

調用getActivity()方法，得到宿主Activity對象，這個activity暴露一個方法，替換fragment

使用關鍵字instances of判斷getActivity()得到的是MainActivity類的實例

調用宿主Activity對象的switchMenuFragment()方法，切換內容部分的fragment，參數：Fragment對象

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宿主activity暴露方法switchMenuFragment()，切換內容區fragment，參數：Fragment對象

getSupportFragmentManager().beginTransaction().replace(R.id.ll_main_content, fragment).commit();

調用SlidingMenu對象的toggle()方法，關閉左側菜單

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設置默認，當app第一次打開時顯示導航第一個的內容

MainActivity

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package com.qingguow.news;import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentTransaction; import android.view.Window;import com.jeremyfeinstein.slidingmenu.lib.SlidingMenu; import com.jeremyfeinstein.slidingmenu.lib.app.SlidingFragmentActivity; import com.qingguow.news.fragment.IndexFragment; import com.qingguow.news.fragment.MenuFragment;public class MainActivity extends SlidingFragmentActivity {private SlidingMenu sm;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);requestWindowFeature(Window.FEATURE_NO_TITLE);//設置滑動菜單 setBehindContentView(R.layout.menu);setContentView(R.layout.activity_main);sm=getSlidingMenu();sm.setMode(SlidingMenu.LEFT);sm.setBehindWidth(200);sm.setShadowDrawable(R.drawable.shape);sm.setShadowWidth(5);sm.setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN);FragmentTransaction ft=getSupportFragmentManager().beginTransaction();//替換導航fragemntMenuFragment menuFragment=new MenuFragment();ft.replace(R.id.ll_left_menu, menuFragment);//替換內容fragmentIndexFragment index=new IndexFragment();ft.replace(R.id.ll_main_content, index).commit();}/*** 暴露方法切換內容區* @param fragment*/public void switchMenuFragment(Fragment fragment){getSupportFragmentManager().beginTransaction().replace(R.id.ll_main_content, fragment).commit();sm.toggle();} }

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MenuFragment.java

package com.qingguow.news.fragment;import java.util.ArrayList; import java.util.List;import android.app.Activity; import android.os.Bundle; import android.support.annotation.Nullable; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ArrayAdapter; import android.widget.ListAdapter; import android.widget.ListView;import com.qingguow.news.MainActivity; import com.qingguow.news.R;public class MenuFragment extends Fragment implements OnItemClickListener {private View view;//加載布局文件 @Overridepublic View onCreateView(LayoutInflater inflater,@Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {view = inflater.inflate(R.layout.list_view, null);return view;}//設置listview數據 @Overridepublic void onActivityCreated(@Nullable Bundle savedInstanceState) {super.onActivityCreated(savedInstanceState);ListView listview = (ListView) view.findViewById(R.id.lv_menu);List<String> data=new ArrayList<String>();data.add("新聞");data.add("發現");data.add("關注");ListAdapter adapter = new ArrayAdapter<>(getActivity(),android.R.layout.simple_list_item_1, android.R.id.text1,data);listview.setAdapter(adapter);listview.setOnItemClickListener(this);}/*** 導航點擊*/@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position,long id) {Fragment fragment=null;switch (position) {case 0:fragment=new IndexFragment();break;default:break;}if(fragment!=null){Activity activity=getActivity();if(activity instanceof MainActivity){((MainActivity) activity).switchMenuFragment(fragment);}}} }

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