1 /*
2  * Copyright (C) 2010 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 package com.example.android.apis.view;
17 
18 import com.example.android.apis.R;
19 
20 import android.app.ListActivity;
21 import android.os.Bundle;
22 import android.view.ActionMode;
23 import android.view.Menu;
24 import android.view.MenuInflater;
25 import android.view.MenuItem;
26 import android.widget.ArrayAdapter;
27 import android.widget.ListView;
28 import android.widget.Toast;
29 
30 /**
31  * This demo illustrates the use of CHOICE_MODE_MULTIPLE_MODAL, a.k.a. selection mode on ListView.
32  */
33 public class List15 extends ListActivity {
34     @Override
onCreate(Bundle savedInstanceState)35     protected void onCreate(Bundle savedInstanceState) {
36         super.onCreate(savedInstanceState);
37         ListView lv = getListView();
38         lv.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
39         lv.setMultiChoiceModeListener(new ModeCallback());
40         setListAdapter(new ArrayAdapter<String>(this,
41                 android.R.layout.simple_list_item_checked, mStrings));
42     }
43 
44     @Override
onPostCreate(Bundle savedInstanceState)45     protected void onPostCreate(Bundle savedInstanceState) {
46         super.onPostCreate(savedInstanceState);
47         getActionBar().setSubtitle("Long press to start selection");
48     }
49 
50     private class ModeCallback implements ListView.MultiChoiceModeListener {
51 
onCreateActionMode(ActionMode mode, Menu menu)52         public boolean onCreateActionMode(ActionMode mode, Menu menu) {
53             MenuInflater inflater = getMenuInflater();
54             inflater.inflate(R.menu.list_select_menu, menu);
55             mode.setTitle("Select Items");
56             setSubtitle(mode);
57             return true;
58         }
59 
onPrepareActionMode(ActionMode mode, Menu menu)60         public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
61             return true;
62         }
63 
onActionItemClicked(ActionMode mode, MenuItem item)64         public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
65             switch (item.getItemId()) {
66             case R.id.share:
67                 Toast.makeText(List15.this, "Shared " + getListView().getCheckedItemCount() +
68                         " items", Toast.LENGTH_SHORT).show();
69                 mode.finish();
70                 break;
71             default:
72                 Toast.makeText(List15.this, "Clicked " + item.getTitle(),
73                         Toast.LENGTH_SHORT).show();
74                 break;
75             }
76             return true;
77         }
78 
onDestroyActionMode(ActionMode mode)79         public void onDestroyActionMode(ActionMode mode) {
80         }
81 
onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked)82         public void onItemCheckedStateChanged(ActionMode mode,
83                 int position, long id, boolean checked) {
84             setSubtitle(mode);
85         }
86 
setSubtitle(ActionMode mode)87         private void setSubtitle(ActionMode mode) {
88             final int checkedCount = getListView().getCheckedItemCount();
89             switch (checkedCount) {
90                 case 0:
91                     mode.setSubtitle(null);
92                     break;
93                 case 1:
94                     mode.setSubtitle("One item selected");
95                     break;
96                 default:
97                     mode.setSubtitle("" + checkedCount + " items selected");
98                     break;
99             }
100         }
101     }
102 
103     private String[] mStrings = Cheeses.sCheeseStrings;
104 }
105