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 17 package com.example.android.listviewitemanimations; 18 19 import java.util.HashMap; 20 import java.util.List; 21 22 import android.content.Context; 23 import android.view.View; 24 import android.view.ViewGroup; 25 import android.widget.ArrayAdapter; 26 27 public class StableArrayAdapter extends ArrayAdapter<String> { 28 29 HashMap<String, Integer> mIdMap = new HashMap<String, Integer>(); 30 View.OnTouchListener mTouchListener; 31 32 public StableArrayAdapter(Context context, int textViewResourceId, 33 List<String> objects, View.OnTouchListener listener) { 34 super(context, textViewResourceId, objects); 35 mTouchListener = listener; 36 for (int i = 0; i < objects.size(); ++i) { 37 mIdMap.put(objects.get(i), i); 38 } 39 } 40 41 @Override 42 public long getItemId(int position) { 43 String item = getItem(position); 44 return mIdMap.get(item); 45 } 46 47 @Override 48 public boolean hasStableIds() { 49 return true; 50 } 51 52 @Override 53 public View getView(int position, View convertView, ViewGroup parent) { 54 View view = super.getView(position, convertView, parent); 55 if (view != convertView) { 56 // Add touch listener to every new view to track swipe motion 57 view.setOnTouchListener(mTouchListener); 58 } 59 return view; 60 } 61 62 } 63