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      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  * couple with the new simple_list_item_activated_1 which uses a highlighted border for selected
     33  * items.
     34  */
     35 public class List16 extends ListActivity {
     36     @Override
     37     protected void onCreate(Bundle savedInstanceState) {
     38         super.onCreate(savedInstanceState);
     39         ListView lv = getListView();
     40         lv.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
     41         lv.setMultiChoiceModeListener(new ModeCallback());
     42         setListAdapter(new ArrayAdapter<String>(this,
     43                 android.R.layout.simple_list_item_activated_1, Cheeses.sCheeseStrings));
     44     }
     45 
     46     @Override
     47     protected void onPostCreate(Bundle savedInstanceState) {
     48         super.onPostCreate(savedInstanceState);
     49         getActionBar().setSubtitle("Long press to start selection");
     50     }
     51 
     52     private class ModeCallback implements ListView.MultiChoiceModeListener {
     53 
     54         public boolean onCreateActionMode(ActionMode mode, Menu menu) {
     55             MenuInflater inflater = getMenuInflater();
     56             inflater.inflate(R.menu.list_select_menu, menu);
     57             mode.setTitle("Select Items");
     58             return true;
     59         }
     60 
     61         public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
     62             return true;
     63         }
     64 
     65         public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
     66             switch (item.getItemId()) {
     67             case R.id.share:
     68                 Toast.makeText(List16.this, "Shared " + getListView().getCheckedItemCount() +
     69                         " items", Toast.LENGTH_SHORT).show();
     70                 mode.finish();
     71                 break;
     72             default:
     73                 Toast.makeText(List16.this, "Clicked " + item.getTitle(),
     74                         Toast.LENGTH_SHORT).show();
     75                 break;
     76             }
     77             return true;
     78         }
     79 
     80         public void onDestroyActionMode(ActionMode mode) {
     81         }
     82 
     83         public void onItemCheckedStateChanged(ActionMode mode,
     84                 int position, long id, boolean checked) {
     85             final int checkedCount = getListView().getCheckedItemCount();
     86             switch (checkedCount) {
     87                 case 0:
     88                     mode.setSubtitle(null);
     89                     break;
     90                 case 1:
     91                     mode.setSubtitle("One item selected");
     92                     break;
     93                 default:
     94                     mode.setSubtitle("" + checkedCount + " items selected");
     95                     break;
     96             }
     97         }
     98 
     99     }
    100 }
    101