The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 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 | import android.view.LayoutInflater; |
| 23 | |
| 24 | import java.util.List; |
| 25 | import java.util.Map; |
| 26 | |
| 27 | /** |
| 28 | * An easy adapter to map static data to group and child views defined in an XML |
| 29 | * file. You can separately specify the data backing the group as a List of |
| 30 | * Maps. Each entry in the ArrayList corresponds to one group in the expandable |
| 31 | * list. The Maps contain the data for each row. You also specify an XML file |
| 32 | * that defines the views used to display a group, and a mapping from keys in |
| 33 | * the Map to specific views. This process is similar for a child, except it is |
| 34 | * one-level deeper so the data backing is specified as a List<List<Map>>, |
| 35 | * where the first List corresponds to the group of the child, the second List |
| 36 | * corresponds to the position of the child within the group, and finally the |
| 37 | * Map holds the data for that particular child. |
| 38 | */ |
| 39 | public class SimpleExpandableListAdapter extends BaseExpandableListAdapter { |
| 40 | private List<? extends Map<String, ?>> mGroupData; |
| 41 | private int mExpandedGroupLayout; |
| 42 | private int mCollapsedGroupLayout; |
| 43 | private String[] mGroupFrom; |
| 44 | private int[] mGroupTo; |
| 45 | |
| 46 | private List<? extends List<? extends Map<String, ?>>> mChildData; |
| 47 | private int mChildLayout; |
| 48 | private int mLastChildLayout; |
| 49 | private String[] mChildFrom; |
| 50 | private int[] mChildTo; |
| 51 | |
| 52 | private LayoutInflater mInflater; |
| 53 | |
| 54 | /** |
| 55 | * Constructor |
| 56 | * |
| 57 | * @param context The context where the {@link ExpandableListView} |
| 58 | * associated with this {@link SimpleExpandableListAdapter} is |
| 59 | * running |
| 60 | * @param groupData A List of Maps. Each entry in the List corresponds to |
| 61 | * one group in the list. The Maps contain the data for each |
| 62 | * group, and should include all the entries specified in |
| 63 | * "groupFrom" |
| 64 | * @param groupFrom A list of keys that will be fetched from the Map |
| 65 | * associated with each group. |
| 66 | * @param groupTo The group views that should display column in the |
| 67 | * "groupFrom" parameter. These should all be TextViews. The |
| 68 | * first N views in this list are given the values of the first N |
| 69 | * columns in the groupFrom parameter. |
| 70 | * @param groupLayout resource identifier of a view layout that defines the |
| 71 | * views for a group. The layout file should include at least |
| 72 | * those named views defined in "groupTo" |
| 73 | * @param childData A List of List of Maps. Each entry in the outer List |
| 74 | * corresponds to a group (index by group position), each entry |
| 75 | * in the inner List corresponds to a child within the group |
| 76 | * (index by child position), and the Map corresponds to the data |
| 77 | * for a child (index by values in the childFrom array). The Map |
| 78 | * contains the data for each child, and should include all the |
| 79 | * entries specified in "childFrom" |
| 80 | * @param childFrom A list of keys that will be fetched from the Map |
| 81 | * associated with each child. |
| 82 | * @param childTo The child views that should display column in the |
| 83 | * "childFrom" parameter. These should all be TextViews. The |
| 84 | * first N views in this list are given the values of the first N |
| 85 | * columns in the childFrom parameter. |
| 86 | * @param childLayout resource identifier of a view layout that defines the |
| 87 | * views for a child. The layout file should include at least |
| 88 | * those named views defined in "childTo" |
| 89 | */ |
| 90 | public SimpleExpandableListAdapter(Context context, |
| 91 | List<? extends Map<String, ?>> groupData, int groupLayout, |
| 92 | String[] groupFrom, int[] groupTo, |
| 93 | List<? extends List<? extends Map<String, ?>>> childData, |
| 94 | int childLayout, String[] childFrom, int[] childTo) { |
| 95 | this(context, groupData, groupLayout, groupLayout, groupFrom, groupTo, childData, |
| 96 | childLayout, childLayout, childFrom, childTo); |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * Constructor |
| 101 | * |
| 102 | * @param context The context where the {@link ExpandableListView} |
| 103 | * associated with this {@link SimpleExpandableListAdapter} is |
| 104 | * running |
| 105 | * @param groupData A List of Maps. Each entry in the List corresponds to |
| 106 | * one group in the list. The Maps contain the data for each |
| 107 | * group, and should include all the entries specified in |
| 108 | * "groupFrom" |
| 109 | * @param groupFrom A list of keys that will be fetched from the Map |
| 110 | * associated with each group. |
| 111 | * @param groupTo The group views that should display column in the |
| 112 | * "groupFrom" parameter. These should all be TextViews. The |
| 113 | * first N views in this list are given the values of the first N |
| 114 | * columns in the groupFrom parameter. |
| 115 | * @param expandedGroupLayout resource identifier of a view layout that |
| 116 | * defines the views for an expanded group. The layout file |
| 117 | * should include at least those named views defined in "groupTo" |
| 118 | * @param collapsedGroupLayout resource identifier of a view layout that |
| 119 | * defines the views for a collapsed group. The layout file |
| 120 | * should include at least those named views defined in "groupTo" |
| 121 | * @param childData A List of List of Maps. Each entry in the outer List |
| 122 | * corresponds to a group (index by group position), each entry |
| 123 | * in the inner List corresponds to a child within the group |
| 124 | * (index by child position), and the Map corresponds to the data |
| 125 | * for a child (index by values in the childFrom array). The Map |
| 126 | * contains the data for each child, and should include all the |
| 127 | * entries specified in "childFrom" |
| 128 | * @param childFrom A list of keys that will be fetched from the Map |
| 129 | * associated with each child. |
| 130 | * @param childTo The child views that should display column in the |
| 131 | * "childFrom" parameter. These should all be TextViews. The |
| 132 | * first N views in this list are given the values of the first N |
| 133 | * columns in the childFrom parameter. |
| 134 | * @param childLayout resource identifier of a view layout that defines the |
| 135 | * views for a child. The layout file should include at least |
| 136 | * those named views defined in "childTo" |
| 137 | */ |
| 138 | public SimpleExpandableListAdapter(Context context, |
| 139 | List<? extends Map<String, ?>> groupData, int expandedGroupLayout, |
| 140 | int collapsedGroupLayout, String[] groupFrom, int[] groupTo, |
| 141 | List<? extends List<? extends Map<String, ?>>> childData, |
| 142 | int childLayout, String[] childFrom, int[] childTo) { |
| 143 | this(context, groupData, expandedGroupLayout, collapsedGroupLayout, |
| 144 | groupFrom, groupTo, childData, childLayout, childLayout, |
| 145 | childFrom, childTo); |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * Constructor |
| 150 | * |
| 151 | * @param context The context where the {@link ExpandableListView} |
| 152 | * associated with this {@link SimpleExpandableListAdapter} is |
| 153 | * running |
| 154 | * @param groupData A List of Maps. Each entry in the List corresponds to |
| 155 | * one group in the list. The Maps contain the data for each |
| 156 | * group, and should include all the entries specified in |
| 157 | * "groupFrom" |
| 158 | * @param groupFrom A list of keys that will be fetched from the Map |
| 159 | * associated with each group. |
| 160 | * @param groupTo The group views that should display column in the |
| 161 | * "groupFrom" parameter. These should all be TextViews. The |
| 162 | * first N views in this list are given the values of the first N |
| 163 | * columns in the groupFrom parameter. |
| 164 | * @param expandedGroupLayout resource identifier of a view layout that |
| 165 | * defines the views for an expanded group. The layout file |
| 166 | * should include at least those named views defined in "groupTo" |
| 167 | * @param collapsedGroupLayout resource identifier of a view layout that |
| 168 | * defines the views for a collapsed group. The layout file |
| 169 | * should include at least those named views defined in "groupTo" |
| 170 | * @param childData A List of List of Maps. Each entry in the outer List |
| 171 | * corresponds to a group (index by group position), each entry |
| 172 | * in the inner List corresponds to a child within the group |
| 173 | * (index by child position), and the Map corresponds to the data |
| 174 | * for a child (index by values in the childFrom array). The Map |
| 175 | * contains the data for each child, and should include all the |
| 176 | * entries specified in "childFrom" |
| 177 | * @param childFrom A list of keys that will be fetched from the Map |
| 178 | * associated with each child. |
| 179 | * @param childTo The child views that should display column in the |
| 180 | * "childFrom" parameter. These should all be TextViews. The |
| 181 | * first N views in this list are given the values of the first N |
| 182 | * columns in the childFrom parameter. |
| 183 | * @param childLayout resource identifier of a view layout that defines the |
| 184 | * views for a child (unless it is the last child within a group, |
| 185 | * in which case the lastChildLayout is used). The layout file |
| 186 | * should include at least those named views defined in "childTo" |
| 187 | * @param lastChildLayout resource identifier of a view layout that defines |
| 188 | * the views for the last child within each group. The layout |
| 189 | * file should include at least those named views defined in |
| 190 | * "childTo" |
| 191 | */ |
| 192 | public SimpleExpandableListAdapter(Context context, |
| 193 | List<? extends Map<String, ?>> groupData, int expandedGroupLayout, |
| 194 | int collapsedGroupLayout, String[] groupFrom, int[] groupTo, |
| 195 | List<? extends List<? extends Map<String, ?>>> childData, |
| 196 | int childLayout, int lastChildLayout, String[] childFrom, |
| 197 | int[] childTo) { |
| 198 | mGroupData = groupData; |
| 199 | mExpandedGroupLayout = expandedGroupLayout; |
| 200 | mCollapsedGroupLayout = collapsedGroupLayout; |
| 201 | mGroupFrom = groupFrom; |
| 202 | mGroupTo = groupTo; |
| 203 | |
| 204 | mChildData = childData; |
| 205 | mChildLayout = childLayout; |
| 206 | mLastChildLayout = lastChildLayout; |
| 207 | mChildFrom = childFrom; |
| 208 | mChildTo = childTo; |
| 209 | |
| 210 | mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); |
| 211 | } |
| 212 | |
| 213 | public Object getChild(int groupPosition, int childPosition) { |
| 214 | return mChildData.get(groupPosition).get(childPosition); |
| 215 | } |
| 216 | |
| 217 | public long getChildId(int groupPosition, int childPosition) { |
| 218 | return childPosition; |
| 219 | } |
| 220 | |
| 221 | public View getChildView(int groupPosition, int childPosition, boolean isLastChild, |
| 222 | View convertView, ViewGroup parent) { |
| 223 | View v; |
| 224 | if (convertView == null) { |
| 225 | v = newChildView(isLastChild, parent); |
| 226 | } else { |
| 227 | v = convertView; |
| 228 | } |
| 229 | bindView(v, mChildData.get(groupPosition).get(childPosition), mChildFrom, mChildTo); |
| 230 | return v; |
| 231 | } |
| 232 | |
| 233 | /** |
| 234 | * Instantiates a new View for a child. |
| 235 | * @param isLastChild Whether the child is the last child within its group. |
| 236 | * @param parent The eventual parent of this new View. |
| 237 | * @return A new child View |
| 238 | */ |
| 239 | public View newChildView(boolean isLastChild, ViewGroup parent) { |
| 240 | return mInflater.inflate((isLastChild) ? mLastChildLayout : mChildLayout, parent, false); |
| 241 | } |
| 242 | |
| 243 | private void bindView(View view, Map<String, ?> data, String[] from, int[] to) { |
| 244 | int len = to.length; |
| 245 | |
| 246 | for (int i = 0; i < len; i++) { |
| 247 | TextView v = (TextView)view.findViewById(to[i]); |
| 248 | if (v != null) { |
| 249 | v.setText((String)data.get(from[i])); |
| 250 | } |
| 251 | } |
| 252 | } |
| 253 | |
| 254 | public int getChildrenCount(int groupPosition) { |
| 255 | return mChildData.get(groupPosition).size(); |
| 256 | } |
| 257 | |
| 258 | public Object getGroup(int groupPosition) { |
| 259 | return mGroupData.get(groupPosition); |
| 260 | } |
| 261 | |
| 262 | public int getGroupCount() { |
| 263 | return mGroupData.size(); |
| 264 | } |
| 265 | |
| 266 | public long getGroupId(int groupPosition) { |
| 267 | return groupPosition; |
| 268 | } |
| 269 | |
| 270 | public View getGroupView(int groupPosition, boolean isExpanded, View convertView, |
| 271 | ViewGroup parent) { |
| 272 | View v; |
| 273 | if (convertView == null) { |
| 274 | v = newGroupView(isExpanded, parent); |
| 275 | } else { |
| 276 | v = convertView; |
| 277 | } |
| 278 | bindView(v, mGroupData.get(groupPosition), mGroupFrom, mGroupTo); |
| 279 | return v; |
| 280 | } |
| 281 | |
| 282 | /** |
| 283 | * Instantiates a new View for a group. |
| 284 | * @param isExpanded Whether the group is currently expanded. |
| 285 | * @param parent The eventual parent of this new View. |
| 286 | * @return A new group View |
| 287 | */ |
| 288 | public View newGroupView(boolean isExpanded, ViewGroup parent) { |
| 289 | return mInflater.inflate((isExpanded) ? mExpandedGroupLayout : mCollapsedGroupLayout, |
| 290 | parent, false); |
| 291 | } |
| 292 | |
| 293 | public boolean isChildSelectable(int groupPosition, int childPosition) { |
| 294 | return true; |
| 295 | } |
| 296 | |
| 297 | public boolean hasStableIds() { |
| 298 | return true; |
| 299 | } |
| 300 | |
| 301 | } |