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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.view.ViewTreeObserver;
     23 import android.transition.Fade;
     24 import android.transition.Scene;
     25 import android.widget.AdapterView;
     26 import android.widget.ArrayAdapter;
     27 import android.widget.LinearLayout;
     28 import android.widget.ListView;
     29 import android.widget.TextView;
     30 import android.transition.AutoTransition;
     31 import android.transition.ChangeBounds;
     32 import android.transition.Transition;
     33 import android.transition.TransitionListenerAdapter;
     34 import android.transition.TransitionManager;
     35 import android.transition.TransitionSet;
     36 
     37 import java.util.ArrayList;
     38 import java.util.HashMap;
     39 import java.util.List;
     40 
     41 public class ListViewAddRemove extends Activity {
     42 
     43     final ArrayList<String> numList = new ArrayList<String>();
     44 
     45     @Override
     46     public void onCreate(Bundle savedInstanceState) {
     47         super.onCreate(savedInstanceState);
     48         setContentView(R.layout.list_view_add_remove);
     49 
     50         final LinearLayout container = findViewById(R.id.container);
     51 
     52         final ListView listview = findViewById(R.id.listview);
     53         for (int i = 0; i < 200; ++i) {
     54             numList.add(Integer.toString(i));
     55         }
     56         final StableArrayAdapter adapter = new StableArrayAdapter(this,
     57                 android.R.layout.simple_list_item_1, numList);
     58         listview.setAdapter(adapter);
     59 
     60         final ViewTreeObserver observer = container.getViewTreeObserver();
     61         observer.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
     62             public void onGlobalLayout() {
     63                 System.out.println("-------------------------------------");
     64                 System.out.println("onLayoutListener: listview view tops: ");
     65                 for (int i = 0; i < listview.getChildCount(); ++i) {
     66                     TextView view = (TextView) listview.getChildAt(i);
     67                     System.out.println("    " + view.getText() + ": " + view.getTop());
     68                 }
     69             }
     70         });
     71 
     72         final Scene mySceneChanger = new Scene(listview);
     73 
     74         mySceneChanger.setEnterAction(new Runnable() {
     75             @Override
     76             public void run() {
     77                 numList.remove(mItemToDelete);
     78                 adapter.notifyDataSetChanged();
     79             }
     80         });
     81         final Transition myTransition = new AutoTransition();
     82         final TransitionSet noFadeIn = new TransitionSet().
     83                 setOrdering(TransitionSet.ORDERING_SEQUENTIAL);
     84         Fade fadeIn = new Fade(Fade.IN);
     85         fadeIn.setDuration(50);
     86         noFadeIn.addTransition(new Fade(Fade.OUT)).addTransition(new ChangeBounds()).addTransition(fadeIn);
     87 
     88         myTransition.addListener(new TransitionListenerAdapter() {
     89             @Override
     90             public void onTransitionStart(Transition transition) {
     91                 System.out.println("---------ListView Tops: Before--------");
     92                 for (int i = 0; i < listview.getChildCount(); ++i) {
     93                     TextView view = (TextView) listview.getChildAt(i);
     94                     int position = listview.getPositionForView(view);
     95                 }
     96             }
     97 
     98             @Override
     99             public void onTransitionEnd(Transition transition) {
    100                 System.out.println("---------ListView Tops: After--------");
    101                 for (int i = 0; i < listview.getChildCount(); ++i) {
    102                     TextView view = (TextView) listview.getChildAt(i);
    103                     int position = listview.getPositionForView(view);
    104                     if (view.hasTransientState()) {
    105 //                        view.setHasTransientState(false);
    106                     }
    107                 }
    108                 myTransition.removeListener(this);
    109             }
    110         });
    111 
    112         listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    113 
    114             @Override
    115             public void onItemClick(AdapterView<?> parent, final View view, int position, long id) {
    116                 System.out.println("---------ListView Tops: OnClick--------");
    117                 String item = (String) parent.getItemAtPosition(position);
    118                 for (int i = 0; i < listview.getChildCount(); ++i) {
    119                     TextView v = (TextView) listview.getChildAt(i);
    120                     if (!item.equals(v.getText())) {
    121 //                        v.setHasTransientState(true);
    122                     }
    123                 }
    124 //                listview.setHasTransientState(true);
    125                 mItemToDelete = item;
    126 //                numList.remove(item);
    127                 TransitionManager.go(mySceneChanger, noFadeIn);
    128 //                view.postDelayed(new Runnable() {
    129 //                    @Override
    130 //                    public void run() {
    131 //                        for (int i = 0; i < listview.getChildCount(); ++i) {
    132 //                            TextView v = (TextView) listview.getChildAt(i);
    133 //                            v.setHasTransientState(false);
    134 //                        }
    135 //                    }
    136 //                }, 200);
    137             }
    138 
    139         });
    140     }
    141 
    142     String mItemToDelete = null;
    143 
    144     private class StableArrayAdapter extends ArrayAdapter<String> {
    145 
    146         HashMap<String, Integer> mIdMap = new HashMap<String, Integer>();
    147 
    148         public StableArrayAdapter(Context context, int textViewResourceId,
    149                 List<String> objects) {
    150             super(context, textViewResourceId, objects);
    151             for (int i = 0; i < objects.size(); ++i) {
    152                 mIdMap.put(objects.get(i), i);
    153             }
    154         }
    155 
    156         @Override
    157         public long getItemId(int position) {
    158             String item = getItem(position);
    159             return mIdMap.get(item);
    160         }
    161 
    162         @Override
    163         public boolean hasStableIds() {
    164             return true;
    165         }
    166 
    167     }
    168 }
    169