android Fragment的簡單使用

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;}@Overridepublic 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"};//設定初始化選擇位置int mCurCheckPosition= 0;int mShownCheckPosition = -1;/** * 填充資料 */@Overridepublic void onActivityCreated(Bundle savedInstanceState) {super.onActivityCreated(savedInstanceState);setListAdapter(new ArrayAdapter(getActivity(), android.R.layout.simple_list_item_activated_1,android.R.id.text1,WEEKS));//建立之時預設選中行的詳細資料showDetals(mCurCheckPosition);}@Overridepublic void onListItemClick(ListView l, View v, int position, long id) {super.onListItemClick(l, v, position, id);//手動選中某一行顯示該行的詳細資料showDetals(position);}/** * 顯示詳細資料 * @param index 選中行 */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){//設定單選模式getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);//指定條目被選中getListView().setItemChecked(index, true);details = DetailsFragment.newInstance(index);//建立新的DetailsFragment執行個體FragmentTransaction ft = am.beginTransaction();//替換FrameLayout為DetailsFragmentft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);//將得到的fragment替換當前ViewGroup內容，add則不替換會一次累加ft.replace(R.id.details, details);//提交ft.commit();}}}

    <frameLayout     android:id="@+id/details"    android:layout_weight="2"    android:layout_width="0dp"    android:layout_height="match_parent"    android:background="?android:attr/detailsElementBackground"/>