Android 中Fragment使用
public class MainActivity extends Activity {
public static String[] array = { "item1,", "item2", "item3", "item4",
"item5", "item6", "item7", "item8" };
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public static class FirstFragment 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.right_frame);
mDualPane = detailsFrame != null
&& detailsFrame.getVisibility() == View.VISIBLE;
if (savedInstanceState != null) {
mCurCheckPosition = savedInstanceState.getInt("curChoice", 0);
}
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);
}
@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);
RightFragment details = (RightFragment) getFragmentManager()
.findFragmentById(R.id.right_frame);
if (details == null || details.getShownIndex() != index) {
details = RightFragment.newInstance(mCurCheckPosition);
FragmentTransaction ft = getFragmentManager()
.beginTransaction();
ft.replace(R.id.right_frame, details);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.commit();
}
} else {
new AlertDialog.Builder(getActivity()).setTitle(
android.R.string.dialog_alert_title).setMessage(
array[index]).setPositiveButton(android.R.string.ok,
null).show();
}
}
}
public static class RightFragment extends Fragment {
@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
public static RightFragment newInstance(int index) {
RightFragment details = new RightFragment();
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;
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
// TODO Auto-generated method stub
super.onCreateOptionsMenu(menu, inflater);
menu.add("Menu 1a").setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
menu.add("Menu 1b").setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
Toast.makeText(getActivity(), "index is"+getShownIndex()+" && menu text is "+item.getTitle(), 1000).show();
return super.onOptionsItemSelected(item);
}
}
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