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      1 /*
      2  * Copyright (C) 2013 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.android.transitiontests;
     17 
     18 import android.app.Activity;
     19 import android.content.Context;
     20 import android.os.Bundle;
     21 import android.view.View;
     22 import android.widget.AdapterView;
     23 import android.widget.ArrayAdapter;
     24 import android.widget.LinearLayout;
     25 import android.widget.ListView;
     26 import android.widget.TextView;
     27 
     28 
     29 import java.util.ArrayList;
     30 import java.util.HashMap;
     31 import java.util.List;
     32 
     33 public class ListViewAddRemoveNoTransition extends Activity {
     34 
     35     final ArrayList<String> numList = new ArrayList<String>();
     36 
     37     @Override
     38     public void onCreate(Bundle savedInstanceState) {
     39         super.onCreate(savedInstanceState);
     40         setContentView(R.layout.list_view_add_remove);
     41 
     42         final LinearLayout container = (LinearLayout) findViewById(R.id.container);
     43 
     44         final ListView listview = (ListView) findViewById(R.id.listview);
     45         for (int i = 0; i < 200; ++i) {
     46             numList.add(Integer.toString(i));
     47         }
     48         final StableArrayAdapter adapter = new StableArrayAdapter(this,
     49                 android.R.layout.simple_list_item_1, numList);
     50         listview.setAdapter(adapter);
     51 
     52         listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
     53 
     54             @Override
     55             public void onItemClick(AdapterView<?> parent, final View view, int position, long id) {
     56                 String item = (String) parent.getItemAtPosition(position);
     57                 for (int i = 0; i < listview.getChildCount(); ++i) {
     58                     TextView v = (TextView) listview.getChildAt(i);
     59                     if (!item.equals(v.getText())) {
     60                         v.setHasTransientState(true);
     61                     }
     62                 }
     63                 numList.remove(item);
     64                 adapter.notifyDataSetChanged();
     65                 view.postDelayed(new Runnable() {
     66                     @Override
     67                     public void run() {
     68                         for (int i = 0; i < listview.getChildCount(); ++i) {
     69                             TextView v = (TextView) listview.getChildAt(i);
     70                             v.setHasTransientState(false);
     71                         }
     72                     }
     73                 }, 200);
     74             }
     75 
     76         });
     77     }
     78 
     79     private class StableArrayAdapter extends ArrayAdapter<String> {
     80 
     81         HashMap<String, Integer> mIdMap = new HashMap<String, Integer>();
     82 
     83         public StableArrayAdapter(Context context, int textViewResourceId,
     84                 List<String> objects) {
     85             super(context, textViewResourceId, objects);
     86             for (int i = 0; i < objects.size(); ++i) {
     87                 mIdMap.put(objects.get(i), i);
     88             }
     89         }
     90 
     91         @Override
     92         public long getItemId(int position) {
     93             String item = getItem(position);
     94             return mIdMap.get(item);
     95         }
     96 
     97         @Override
     98         public boolean hasStableIds() {
     99             return true;
    100         }
    101 
    102     }
    103 }
    104