1 /* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.widget.listview; 18 19 import android.widget.TextView; 20 import android.util.ListScenario; 21 22 /** 23 * The header text view echos the value of the selected item by using (indirectly) 24 * the {@link android.widget.AdapterView.OnItemSelectedListener}. 25 */ 26 public class ListWithOnItemSelectedAction extends ListScenario { 27 protected void init(Params params) { 28 params.setNumItems(8) 29 .setItemScreenSizeFactor(0.2) 30 .includeHeaderAboveList(true); 31 32 } 33 34 @Override 35 protected void positionSelected(int positon) { 36 if (positon != getListView().getSelectedItemPosition()) { 37 throw new IllegalStateException("something is fishy... the selected postion does not " + 38 "match what the list reports."); 39 } 40 setHeaderValue( 41 ((TextView) getListView().getSelectedView()).getText().toString()); 42 43 } 44 } 45
