FrameLayout和Fragment处理Android应用UI布局实例

效果图的左边是一个列表，右边是列表item的详情。
先看一下布局文件(layout)：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://www.easck.com/apk/res/android" 
 android:orientation="horizontal" android:layout_width="match_parent" 
 android:layout_height="match_parent"> 
 <fragment 
  class="com.fragment.main.TitlesFragment" 
  android:id="@+id/titles" android:layout_weight="1" 
  android:layout_width="0px" android:layout_height="match_parent" /> 
 <FrameLayout android:id="@+id/details" android:layout_weight="1" 
  android:layout_width="0px" android:layout_height="match_parent" 
  android:background="?android:attr/detailsElementBackground" /> 
</LinearLayout> 

        布局文件中使用了fragment标签和FrameLayout标签。Android Fragment使用 中介绍了2中嵌入Fragment的方法，这个实例中都用到，从布局文件看到有了fragment标签，这是一种使用方法，FrameLayout标签将会成为第二种加载fragment的载体view。
        看一下程序实现（com.fragment.main.TitlesFragment）：

public class TitlesFragment extends ListFragment { 
 
 int mCurCheckPosition = 0; 
 int mShownCheckPosition = -1; 
 
 @Override 
 public void onActivityCreated(Bundle savedInstanceState) { 
  super.onActivityCreated(savedInstanceState); 
               
  setListAdapter(new ArrayAdapter<String>(getActivity(), 
    android.R.layout.simple_list_item_activated_1, 
    Shakespeare.TITLES)); //使用静态数组填充列表 
  if (savedInstanceState != null) { 
   mCurCheckPosition = savedInstanceState.getInt("curChoice", 0); 
   mShownCheckPosition = savedInstanceState.getInt("shownChoice", -1); 
  } 
   getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE); 
   showDetails(mCurCheckPosition); 
 } 
 
 @Override 
 public void onSaveInstanceState(Bundle outState) { 
  super.onSaveInstanceState(outState); 
 
  outState.putInt("curChoice", mCurCheckPosition); 
  outState.putInt("shownChoice", mShownCheckPosition); 
 } 
 
 @Override 
 public void onListItemClick(ListView l, View v, int position, long id) { 
  showDetails(position); 
 } 
 
 /** 
  *显示listview item 详情 
  */ 
 void showDetails(int index) { 
  mCurCheckPosition = index; 
   getListView().setItemChecked(index, true); 
 
   if (mShownCheckPosition != mCurCheckPosition) { 
 
    DetailsFragment df = DetailsFragment.newInstance(index); 
    FragmentTransaction ft = getFragmentManager() 
      .beginTransaction(); 
    ft.replace(R.id.details, df); 
    ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE); 
    ft.commit(); 
    mShownCheckPosition = index; 
   }  
 } 
 
} 

								 
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