Android Fragments 详细使用

<? 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  class ="com.xuzhi.fragment.FragmentDemoActivity$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"

        ></ FrameLayout > </ LinearLayout >

package  com.xuzhi.fragment; import android.app.Activity; import android.app.AlertDialog; import android.app.Fragment; import android.app.FragmentTransaction; import android.app.ListFragment; import android.os.Bundle; import android.util.TypedValue; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.ScrollView; import android.widget.TextView; public  class FragmentDemoActivity  extends Activity {      public  static String[] array = { "text1,", "text2", "text3", "text4",             "text5,", "text6", "text7", "text8" };      /**  Called when the activity is first created.  */     @Override      public  void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.main);     }               public  static  class TitlesFragment  extends ListFragment {          boolean mDualPane;          int mCurCheckPosition = 0;                  @Override          public  void onCreate(Bundle savedInstanceState) {              //  TODO Auto-generated method stub

             super.onCreate(savedInstanceState);             System.out.println("Fragment-->onCreate");         }                  @Override          public View onCreateView(LayoutInflater inflater, ViewGroup container,                 Bundle savedInstanceState) {              //  TODO Auto-generated method stub

            System.out.println("Fragment-->onCreateView");              return  super.onCreateView(inflater, container, savedInstanceState);         }                  @Override          public  void onPause() {              //  TODO Auto-generated method stub

             super.onPause();             System.out.println("Fragment-->onPause");         }                           @Override          public  void onStop() {              //  TODO Auto-generated method stub

             super.onStop();                          System.out.println("Fragment-->onStop");         }                  @Override          public  void onAttach(Activity activity) {              //  TODO Auto-generated method stub

             super.onAttach(activity);             System.out.println("Fragment-->onAttach");         }                  @Override          public  void onStart() {              //  TODO Auto-generated method stub

             super.onStart();             System.out.println("Fragment-->onStart");         }                  @Override          public  void onResume() {              //  TODO Auto-generated method stub

             super.onResume();             System.out.println("Fragment-->onResume");         }                  @Override          public  void onDestroy() {              //  TODO Auto-generated method stub

             super.onDestroy();             System.out.println("Fragment-->onDestroy");         }                           @Override          public  void onActivityCreated(Bundle savedInstanceState) {              //  TODO Auto-generated method stub

             super.onActivityCreated(savedInstanceState);             System.out.println("Fragment-->onActivityCreted");             setListAdapter( new ArrayAdapter<String>(getActivity(),                     android.R.layout.simple_list_item_1, array));             View detailsFrame = getActivity().findViewById(R.id.details);             mDualPane = detailsFrame !=  null                     && detailsFrame.getVisibility() == View.VISIBLE;              if (savedInstanceState !=  null) {                 mCurCheckPosition = savedInstanceState.getInt("curChoice", 0);  // 从保存的状态中取出数据

            }              if (mDualPane) {                 getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);                 showDetails(mCurCheckPosition);             }         }         @Override          public  void onSaveInstanceState(Bundle outState) {              //  TODO Auto-generated method stub

             super.onSaveInstanceState(outState);             outState.putInt("curChoice", mCurCheckPosition); // 保存当前的下标

        }         @Override          public  void onListItemClick(ListView l, View v,  int position,  long id) {              //  TODO Auto-generated method stub

             super.onListItemClick(l, v, position, id);             showDetails(position);         }          void showDetails( int index) {             mCurCheckPosition = index;               if (mDualPane) {                 getListView().setItemChecked(index,  true);                 DetailsFragment details = (DetailsFragment) getFragmentManager()                         .findFragmentById(R.id.details);                   if (details ==  null || details.getShownIndex() != index) {                     details = DetailsFragment.newInstance(mCurCheckPosition);                       // 得到一个fragment 事务（类似sqlite的操作）

                    FragmentTransaction ft = getFragmentManager()                             .beginTransaction();                     ft.replace(R.id.details, details); // 将得到的fragment 替换当前的viewGroup内容，add则不替换会依次累加

                    ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE); // 设置动画效果

                    ft.commit(); // 提交

                }             }  else {                  new AlertDialog.Builder(getActivity()).setTitle(                         android.R.string.dialog_alert_title).setMessage(                         array[index]).setPositiveButton(android.R.string.ok,                          null).show();             }         }     }      /**

     * 作为界面的一部分，为fragment 提供一个layout

     *  @author  terry

     *

      */      public  static  class DetailsFragment  extends Fragment {          public  static DetailsFragment newInstance( int index) {              DetailsFragment details =  new DetailsFragment();             Bundle args =  new Bundle();             args.putInt("index", index);             details.setArguments(args);              return details;         }          public  int getShownIndex() {              return getArguments().getInt("index", 0);         }         @Override          public View onCreateView(LayoutInflater inflater, ViewGroup container,                 Bundle savedInstanceState) {              //  TODO Auto-generated method stub

             if (container ==  null)                  return  null;             ScrollView scroller =  new ScrollView(getActivity());             TextView text =  new TextView(getActivity());              int padding = ( int) TypedValue.applyDimension(                     TypedValue.COMPLEX_UNIT_DIP, 4, getActivity()                             .getResources().getDisplayMetrics());             text.setPadding(padding, padding, padding, padding);             scroller.addView(text);             text.setText(array[getShownIndex()]);              return scroller;         }     } }