| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.example.android.fragments; |
| |
| import android.app.Activity; |
| import android.os.Bundle; |
| import android.support.v4.app.ListFragment; |
| import android.view.View; |
| import android.widget.ArrayAdapter; |
| import android.widget.ListView; |
| |
| public class HeadlinesFragment extends ListFragment { |
| OnHeadlineSelectedListener mCallback; |
| |
| // The container Activity must implement this interface so the frag can deliver messages |
| public interface OnHeadlineSelectedListener { |
| /** Called by HeadlinesFragment when a list item is selected */ |
| public void onArticleSelected(int position); |
| } |
| |
| @Override |
| public void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| |
| // We need to use a different list item layout for devices older than Honeycomb |
| int layout = Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB ? |
| android.R.layout.simple_list_item_activated_1 : android.R.layout.simple_list_item_1; |
| |
| // Create an array adapter for the list view, using the Ipsum headlines array |
| setListAdapter(new ArrayAdapter<String>(getActivity(), layout, Ipsum.Headlines)); |
| } |
| |
| @Override |
| public void onStart() { |
| super.onStart(); |
| |
| // When in two-pane layout, set the listview to highlight the selected list item |
| // (We do this during onStart because at the point the listview is available.) |
| if (getFragmentManager().findFragmentById(R.id.article_fragment) != null) { |
| getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE); |
| } |
| } |
| |
| @Override |
| public void onAttach(Activity activity) { |
| super.onAttach(activity); |
| |
| // This makes sure that the container activity has implemented |
| // the callback interface. If not, it throws an exception. |
| try { |
| mCallback = (OnHeadlineSelectedListener) activity; |
| } catch (ClassCastException e) { |
| throw new ClassCastException(activity.toString() |
| + " must implement OnHeadlineSelectedListener"); |
| } |
| } |
| |
| @Override |
| public void onListItemClick(ListView l, View v, int position, long id) { |
| // Notify the parent activity of selected item |
| mCallback.onArticleSelected(position); |
| |
| // Set the item as checked to be highlighted when in two-pane layout |
| getListView().setItemChecked(position, true); |
| } |
| } |