Java tutorial
/* * 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 loonyb.in.posmachine; import android.app.Activity; import android.os.Build; import android.os.Bundle; import android.support.v4.app.ListFragment; import android.view.View; import android.widget.ArrayAdapter; import android.widget.ListView; public class CustomersFragment extends ListFragment { OnCustomerSelectedListener mCallback; // The container Activity must implement this interface so the frag can deliver messages public interface OnCustomerSelectedListener { /** Called by CustomersFragment when a list item is selected */ public void onInvoiceSelected(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 customers array setListAdapter(new ArrayAdapter<String>(getActivity(), layout, Ipsum.Customers)); } @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.invoice_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 = (OnCustomerSelectedListener) activity; } catch (ClassCastException e) { throw new ClassCastException(activity.toString() + " must implement OnCustomerSelectedListener"); } } @Override public void onListItemClick(ListView l, View v, int position, long id) { // Notify the parent activity of selected item mCallback.onInvoiceSelected(position); // Set the item as checked to be highlighted when in two-pane layout getListView().setItemChecked(position, true); } }