1/* 2 * Copyright (C) 2008 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 17package android.widget.listview; 18 19import com.android.frameworks.coretests.R; 20 21import android.app.ListActivity; 22import android.content.Context; 23import android.os.Bundle; 24import android.view.Menu; 25import android.view.MenuItem; 26import android.view.View; 27import android.widget.ArrayAdapter; 28 29 30/** 31 * Tests using an empty view with a list */ 32public class ListWithEmptyView extends ListActivity { 33 34 private class CarefulAdapter<T> extends ArrayAdapter<T> { 35 36 public CarefulAdapter(Context context, int textViewResourceId) { 37 super(context, textViewResourceId); 38 // TODO Auto-generated constructor stub 39 } 40 41 @Override 42 public long getItemId(int position) { 43 if (position < 0 || position >= this.getCount()) { 44 throw new ArrayIndexOutOfBoundsException(); 45 } 46 return super.getItemId(position); 47 } 48 49 50 } 51 52 public static final int MENU_ADD = Menu.FIRST + 1; 53 public static final int MENU_REMOVE = Menu.FIRST + 2; 54 55 private CarefulAdapter<String> mAdapter; 56 57 private int mNextItem = 0; 58 59 private View mEmptyView; 60 61 @Override 62 public void onCreate(Bundle savedInstanceState) { 63 super.onCreate(savedInstanceState); 64 mAdapter = new CarefulAdapter<String>(this, 65 android.R.layout.simple_list_item_1); 66 setContentView(R.layout.list_with_empty_view); 67 setListAdapter(mAdapter); 68 69 mEmptyView = findViewById(R.id.empty); 70 getListView().setEmptyView(mEmptyView); 71 } 72 73 @Override 74 public boolean onCreateOptionsMenu(Menu menu) { 75 super.onCreateOptionsMenu(menu); 76 menu.add(0, MENU_ADD, 0, R.string.menu_add) 77 .setIcon(android.R.drawable.ic_menu_add); 78 menu.add(0, MENU_REMOVE, 0, R.string.menu_remove) 79 .setIcon(android.R.drawable.ic_menu_delete); 80 return true; 81 } 82 83 @Override 84 public boolean onOptionsItemSelected(MenuItem item) { 85 switch (item.getItemId()) { 86 case MENU_ADD: 87 String str = "Item + " + mNextItem++; 88 mAdapter.add(str); 89 return true; 90 case MENU_REMOVE: 91 if (mAdapter.getCount() > 0) { 92 mAdapter.remove(mAdapter.getItem(0)); 93 } 94 return true; 95 } 96 97 return super.onOptionsItemSelected(item); 98 } 99 100 public View getEmptyView() { 101 return mEmptyView; 102 } 103 104} 105