android Fragment的简单使用

public class DetailsFragment extends Fragment{
	private static final String[] WEEKS=new String[]{"a-1","b-1","c-1"};
	public static DetailsFragment newInstance(int index){
		DetailsFragment f = new DetailsFragment();
		Bundle b = new Bundle();
		b.putInt("index", index);
		f.setArguments(b);
		System.out.println("--==");
		return f;
	}
	public int getShowIndex(){
		int index = getArguments().getInt("index",0);
		return index;
	}
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		TextView text = new TextView(getActivity());
		text.setText(WEEKS[getShowIndex()]);
		return text;
	}
}

public class FragmentAcitivity extends ListFragment{
	private static final String[] WEEKS=new String[]{"a","b","c"};
	//设置初始化选择位置
	int mCurCheckPosition= 0;
	int mShownCheckPosition = -1;
	/**
	 * 填充数据
	 */
	@Override
	public void onActivityCreated(Bundle savedInstanceState) {
		super.onActivityCreated(savedInstanceState);
		setListAdapter(new ArrayAdapter<String>(getActivity(), 
				android.R.layout.simple_list_item_activated_1,
				android.R.id.text1,WEEKS));
		//创建之时默认选中行的详细信息
		showDetals(mCurCheckPosition);
	}

	@Override
	public void onListItemClick(ListView l, View v, int position, long id) {
		super.onListItemClick(l, v, position, id);
		//手动选中某一行显示该行的详细信息
		showDetals(position);
	}
	/**
	 * 显示详细信息
	 * @param index 选中行
	 */
	public void showDetals(int index){
		//fragment的管理器
		FragmentManager am = getFragmentManager();
		DetailsFragment details = (DetailsFragment)am.findFragmentById(R.id.details);
		if(details == null || details.getShowIndex()!=index){
			//设置单选模式
			getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
			//指定条目被选中
			getListView().setItemChecked(index, true);
			details = DetailsFragment.newInstance(index);
			//新建新的DetailsFragment实例
			FragmentTransaction ft = am.beginTransaction();
			//替换FrameLayout为DetailsFragment
			ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
			//将得到的fragment替换当前ViewGroup内容，add则不替换会一次累加
			ft.replace(R.id.details, details);
			//提交
			ft.commit();
		}
	}

}

<?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="horizontal" >
    <fragment android:id="@+id/titles"
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1"
        class="com.example.fragment.FragmentAcitivity"/>
	<FrameLayout 
	    android:id="@+id/details"
	    android:layout_weight="2"
	    android:layout_width="0dp"
	    android:layout_height="match_parent"
	    android:background="?android:attr/detailsElementBackground"/>
</LinearLayout>