| /* |
| * Copyright (C) 2006 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.widget; |
| |
| import android.content.Context; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.view.LayoutInflater; |
| |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * An easy adapter to map static data to group and child views defined in an XML |
| * file. You can separately specify the data backing the group as a List of |
| * Maps. Each entry in the ArrayList corresponds to one group in the expandable |
| * list. The Maps contain the data for each row. You also specify an XML file |
| * that defines the views used to display a group, and a mapping from keys in |
| * the Map to specific views. This process is similar for a child, except it is |
| * one-level deeper so the data backing is specified as a List<List<Map>>, |
| * where the first List corresponds to the group of the child, the second List |
| * corresponds to the position of the child within the group, and finally the |
| * Map holds the data for that particular child. |
| */ |
| public class SimpleExpandableListAdapter extends BaseExpandableListAdapter { |
| private List<? extends Map<String, ?>> mGroupData; |
| private int mExpandedGroupLayout; |
| private int mCollapsedGroupLayout; |
| private String[] mGroupFrom; |
| private int[] mGroupTo; |
| |
| private List<? extends List<? extends Map<String, ?>>> mChildData; |
| private int mChildLayout; |
| private int mLastChildLayout; |
| private String[] mChildFrom; |
| private int[] mChildTo; |
| |
| private LayoutInflater mInflater; |
| |
| /** |
| * Constructor |
| * |
| * @param context The context where the {@link ExpandableListView} |
| * associated with this {@link SimpleExpandableListAdapter} is |
| * running |
| * @param groupData A List of Maps. Each entry in the List corresponds to |
| * one group in the list. The Maps contain the data for each |
| * group, and should include all the entries specified in |
| * "groupFrom" |
| * @param groupFrom A list of keys that will be fetched from the Map |
| * associated with each group. |
| * @param groupTo The group views that should display column in the |
| * "groupFrom" parameter. These should all be TextViews. The |
| * first N views in this list are given the values of the first N |
| * columns in the groupFrom parameter. |
| * @param groupLayout resource identifier of a view layout that defines the |
| * views for a group. The layout file should include at least |
| * those named views defined in "groupTo" |
| * @param childData A List of List of Maps. Each entry in the outer List |
| * corresponds to a group (index by group position), each entry |
| * in the inner List corresponds to a child within the group |
| * (index by child position), and the Map corresponds to the data |
| * for a child (index by values in the childFrom array). The Map |
| * contains the data for each child, and should include all the |
| * entries specified in "childFrom" |
| * @param childFrom A list of keys that will be fetched from the Map |
| * associated with each child. |
| * @param childTo The child views that should display column in the |
| * "childFrom" parameter. These should all be TextViews. The |
| * first N views in this list are given the values of the first N |
| * columns in the childFrom parameter. |
| * @param childLayout resource identifier of a view layout that defines the |
| * views for a child. The layout file should include at least |
| * those named views defined in "childTo" |
| */ |
| public SimpleExpandableListAdapter(Context context, |
| List<? extends Map<String, ?>> groupData, int groupLayout, |
| String[] groupFrom, int[] groupTo, |
| List<? extends List<? extends Map<String, ?>>> childData, |
| int childLayout, String[] childFrom, int[] childTo) { |
| this(context, groupData, groupLayout, groupLayout, groupFrom, groupTo, childData, |
| childLayout, childLayout, childFrom, childTo); |
| } |
| |
| /** |
| * Constructor |
| * |
| * @param context The context where the {@link ExpandableListView} |
| * associated with this {@link SimpleExpandableListAdapter} is |
| * running |
| * @param groupData A List of Maps. Each entry in the List corresponds to |
| * one group in the list. The Maps contain the data for each |
| * group, and should include all the entries specified in |
| * "groupFrom" |
| * @param groupFrom A list of keys that will be fetched from the Map |
| * associated with each group. |
| * @param groupTo The group views that should display column in the |
| * "groupFrom" parameter. These should all be TextViews. The |
| * first N views in this list are given the values of the first N |
| * columns in the groupFrom parameter. |
| * @param expandedGroupLayout resource identifier of a view layout that |
| * defines the views for an expanded group. The layout file |
| * should include at least those named views defined in "groupTo" |
| * @param collapsedGroupLayout resource identifier of a view layout that |
| * defines the views for a collapsed group. The layout file |
| * should include at least those named views defined in "groupTo" |
| * @param childData A List of List of Maps. Each entry in the outer List |
| * corresponds to a group (index by group position), each entry |
| * in the inner List corresponds to a child within the group |
| * (index by child position), and the Map corresponds to the data |
| * for a child (index by values in the childFrom array). The Map |
| * contains the data for each child, and should include all the |
| * entries specified in "childFrom" |
| * @param childFrom A list of keys that will be fetched from the Map |
| * associated with each child. |
| * @param childTo The child views that should display column in the |
| * "childFrom" parameter. These should all be TextViews. The |
| * first N views in this list are given the values of the first N |
| * columns in the childFrom parameter. |
| * @param childLayout resource identifier of a view layout that defines the |
| * views for a child. The layout file should include at least |
| * those named views defined in "childTo" |
| */ |
| public SimpleExpandableListAdapter(Context context, |
| List<? extends Map<String, ?>> groupData, int expandedGroupLayout, |
| int collapsedGroupLayout, String[] groupFrom, int[] groupTo, |
| List<? extends List<? extends Map<String, ?>>> childData, |
| int childLayout, String[] childFrom, int[] childTo) { |
| this(context, groupData, expandedGroupLayout, collapsedGroupLayout, |
| groupFrom, groupTo, childData, childLayout, childLayout, |
| childFrom, childTo); |
| } |
| |
| /** |
| * Constructor |
| * |
| * @param context The context where the {@link ExpandableListView} |
| * associated with this {@link SimpleExpandableListAdapter} is |
| * running |
| * @param groupData A List of Maps. Each entry in the List corresponds to |
| * one group in the list. The Maps contain the data for each |
| * group, and should include all the entries specified in |
| * "groupFrom" |
| * @param groupFrom A list of keys that will be fetched from the Map |
| * associated with each group. |
| * @param groupTo The group views that should display column in the |
| * "groupFrom" parameter. These should all be TextViews. The |
| * first N views in this list are given the values of the first N |
| * columns in the groupFrom parameter. |
| * @param expandedGroupLayout resource identifier of a view layout that |
| * defines the views for an expanded group. The layout file |
| * should include at least those named views defined in "groupTo" |
| * @param collapsedGroupLayout resource identifier of a view layout that |
| * defines the views for a collapsed group. The layout file |
| * should include at least those named views defined in "groupTo" |
| * @param childData A List of List of Maps. Each entry in the outer List |
| * corresponds to a group (index by group position), each entry |
| * in the inner List corresponds to a child within the group |
| * (index by child position), and the Map corresponds to the data |
| * for a child (index by values in the childFrom array). The Map |
| * contains the data for each child, and should include all the |
| * entries specified in "childFrom" |
| * @param childFrom A list of keys that will be fetched from the Map |
| * associated with each child. |
| * @param childTo The child views that should display column in the |
| * "childFrom" parameter. These should all be TextViews. The |
| * first N views in this list are given the values of the first N |
| * columns in the childFrom parameter. |
| * @param childLayout resource identifier of a view layout that defines the |
| * views for a child (unless it is the last child within a group, |
| * in which case the lastChildLayout is used). The layout file |
| * should include at least those named views defined in "childTo" |
| * @param lastChildLayout resource identifier of a view layout that defines |
| * the views for the last child within each group. The layout |
| * file should include at least those named views defined in |
| * "childTo" |
| */ |
| public SimpleExpandableListAdapter(Context context, |
| List<? extends Map<String, ?>> groupData, int expandedGroupLayout, |
| int collapsedGroupLayout, String[] groupFrom, int[] groupTo, |
| List<? extends List<? extends Map<String, ?>>> childData, |
| int childLayout, int lastChildLayout, String[] childFrom, |
| int[] childTo) { |
| mGroupData = groupData; |
| mExpandedGroupLayout = expandedGroupLayout; |
| mCollapsedGroupLayout = collapsedGroupLayout; |
| mGroupFrom = groupFrom; |
| mGroupTo = groupTo; |
| |
| mChildData = childData; |
| mChildLayout = childLayout; |
| mLastChildLayout = lastChildLayout; |
| mChildFrom = childFrom; |
| mChildTo = childTo; |
| |
| mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); |
| } |
| |
| public Object getChild(int groupPosition, int childPosition) { |
| return mChildData.get(groupPosition).get(childPosition); |
| } |
| |
| public long getChildId(int groupPosition, int childPosition) { |
| return childPosition; |
| } |
| |
| public View getChildView(int groupPosition, int childPosition, boolean isLastChild, |
| View convertView, ViewGroup parent) { |
| View v; |
| if (convertView == null) { |
| v = newChildView(isLastChild, parent); |
| } else { |
| v = convertView; |
| } |
| bindView(v, mChildData.get(groupPosition).get(childPosition), mChildFrom, mChildTo); |
| return v; |
| } |
| |
| /** |
| * Instantiates a new View for a child. |
| * @param isLastChild Whether the child is the last child within its group. |
| * @param parent The eventual parent of this new View. |
| * @return A new child View |
| */ |
| public View newChildView(boolean isLastChild, ViewGroup parent) { |
| return mInflater.inflate((isLastChild) ? mLastChildLayout : mChildLayout, parent, false); |
| } |
| |
| private void bindView(View view, Map<String, ?> data, String[] from, int[] to) { |
| int len = to.length; |
| |
| for (int i = 0; i < len; i++) { |
| TextView v = (TextView)view.findViewById(to[i]); |
| if (v != null) { |
| v.setText((String)data.get(from[i])); |
| } |
| } |
| } |
| |
| public int getChildrenCount(int groupPosition) { |
| return mChildData.get(groupPosition).size(); |
| } |
| |
| public Object getGroup(int groupPosition) { |
| return mGroupData.get(groupPosition); |
| } |
| |
| public int getGroupCount() { |
| return mGroupData.size(); |
| } |
| |
| public long getGroupId(int groupPosition) { |
| return groupPosition; |
| } |
| |
| public View getGroupView(int groupPosition, boolean isExpanded, View convertView, |
| ViewGroup parent) { |
| View v; |
| if (convertView == null) { |
| v = newGroupView(isExpanded, parent); |
| } else { |
| v = convertView; |
| } |
| bindView(v, mGroupData.get(groupPosition), mGroupFrom, mGroupTo); |
| return v; |
| } |
| |
| /** |
| * Instantiates a new View for a group. |
| * @param isExpanded Whether the group is currently expanded. |
| * @param parent The eventual parent of this new View. |
| * @return A new group View |
| */ |
| public View newGroupView(boolean isExpanded, ViewGroup parent) { |
| return mInflater.inflate((isExpanded) ? mExpandedGroupLayout : mCollapsedGroupLayout, |
| parent, false); |
| } |
| |
| public boolean isChildSelectable(int groupPosition, int childPosition) { |
| return true; |
| } |
| |
| public boolean hasStableIds() { |
| return true; |
| } |
| |
| } |