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 
17 package android.widget.listview;
18 
19 import android.app.ListActivity;
20 import android.content.Context;
21 import android.os.Bundle;
22 import android.view.Menu;
23 import android.view.MenuItem;
24 import android.view.View;
25 import android.widget.ArrayAdapter;
26 
27 import com.android.frameworks.coretests.R;
28 
29 
30 /**
31  * Tests using an empty view with a list */
32 public class ListWithEmptyView extends ListActivity {
33 
34     private class CarefulAdapter<T> extends ArrayAdapter<T> {
35 
CarefulAdapter(Context context, int textViewResourceId)36         public CarefulAdapter(Context context, int textViewResourceId) {
37             super(context, textViewResourceId);
38             // TODO Auto-generated constructor stub
39         }
40 
41         @Override
getItemId(int position)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
onCreate(Bundle savedInstanceState)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
onCreateOptionsMenu(Menu menu)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
onOptionsItemSelected(MenuItem item)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 
getEmptyView()100     public View getEmptyView() {
101         return mEmptyView;
102     }
103 
104 }
105