1 /*
2  * Copyright (C) 2012 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 android.widget;
18 
19 import android.content.Context;
20 import android.view.View;
21 import android.view.ViewGroup;
22 
23 import java.util.ArrayList;
24 
25 /**
26  * @hide
27  */
28 public class RemoteViewsListAdapter extends BaseAdapter {
29 
30     private Context mContext;
31     private ArrayList<RemoteViews> mRemoteViewsList;
32     private ArrayList<Integer> mViewTypes = new ArrayList<Integer>();
33     private int mViewTypeCount;
34 
RemoteViewsListAdapter(Context context, ArrayList<RemoteViews> remoteViews, int viewTypeCount)35     public RemoteViewsListAdapter(Context context, ArrayList<RemoteViews> remoteViews,
36             int viewTypeCount) {
37         mContext = context;
38         mRemoteViewsList = remoteViews;
39         mViewTypeCount = viewTypeCount;
40         init();
41     }
42 
setViewsList(ArrayList<RemoteViews> remoteViews)43     public void setViewsList(ArrayList<RemoteViews> remoteViews) {
44         mRemoteViewsList = remoteViews;
45         init();
46         notifyDataSetChanged();
47     }
48 
init()49     private void init() {
50         if (mRemoteViewsList == null) return;
51 
52         mViewTypes.clear();
53         for (RemoteViews rv: mRemoteViewsList) {
54             if (!mViewTypes.contains(rv.getLayoutId())) {
55                 mViewTypes.add(rv.getLayoutId());
56             }
57         }
58 
59         if (mViewTypes.size() > mViewTypeCount || mViewTypeCount < 1) {
60             throw new RuntimeException("Invalid view type count -- view type count must be >= 1" +
61                     "and must be as large as the total number of distinct view types");
62         }
63     }
64 
65     @Override
getCount()66     public int getCount() {
67         if (mRemoteViewsList != null) {
68             return mRemoteViewsList.size();
69         } else {
70             return 0;
71         }
72     }
73 
74     @Override
getItem(int position)75     public Object getItem(int position) {
76         return null;
77     }
78 
79     @Override
getItemId(int position)80     public long getItemId(int position) {
81         return position;
82     }
83 
84     @Override
getView(int position, View convertView, ViewGroup parent)85     public View getView(int position, View convertView, ViewGroup parent) {
86         if (position < getCount()) {
87             RemoteViews rv = mRemoteViewsList.get(position);
88             rv.setIsWidgetCollectionChild(true);
89             View v;
90             if (convertView != null && rv != null &&
91                     convertView.getId() == rv.getLayoutId()) {
92                 v = convertView;
93                 rv.reapply(mContext, v);
94             } else {
95                 v = rv.apply(mContext, parent);
96             }
97             return v;
98         } else {
99             return null;
100         }
101     }
102 
103     @Override
getItemViewType(int position)104     public int getItemViewType(int position) {
105         if (position < getCount()) {
106             int layoutId = mRemoteViewsList.get(position).getLayoutId();
107             return mViewTypes.indexOf(layoutId);
108         } else {
109             return 0;
110         }
111     }
112 
getViewTypeCount()113     public int getViewTypeCount() {
114         return mViewTypeCount;
115     }
116 
117     @Override
hasStableIds()118     public boolean hasStableIds() {
119         return false;
120     }
121 }
122