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      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.database.Cursor;
     21 import android.view.View;
     22 import android.view.ViewGroup;
     23 import android.view.LayoutInflater;
     24 
     25 /**
     26  * A fairly simple ExpandableListAdapter that creates views defined in an XML
     27  * file. You can specify the XML file that defines the appearance of the views.
     28  */
     29 public abstract class ResourceCursorTreeAdapter extends CursorTreeAdapter {
     30     private int mCollapsedGroupLayout;
     31     private int mExpandedGroupLayout;
     32     private int mChildLayout;
     33     private int mLastChildLayout;
     34     private LayoutInflater mInflater;
     35 
     36     /**
     37      * Constructor.
     38      *
     39      * @param context The context where the ListView associated with this
     40      *            SimpleListItemFactory is running
     41      * @param cursor The database cursor
     42      * @param collapsedGroupLayout resource identifier of a layout file that
     43      *            defines the views for collapsed groups.
     44      * @param expandedGroupLayout resource identifier of a layout file that
     45      *            defines the views for expanded groups.
     46      * @param childLayout resource identifier of a layout file that defines the
     47      *            views for all children but the last..
     48      * @param lastChildLayout resource identifier of a layout file that defines
     49      *            the views for the last child of a group.
     50      */
     51     public ResourceCursorTreeAdapter(Context context, Cursor cursor, int collapsedGroupLayout,
     52             int expandedGroupLayout, int childLayout, int lastChildLayout) {
     53         super(cursor, context);
     54 
     55         mCollapsedGroupLayout = collapsedGroupLayout;
     56         mExpandedGroupLayout = expandedGroupLayout;
     57         mChildLayout = childLayout;
     58         mLastChildLayout = lastChildLayout;
     59 
     60         mInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
     61     }
     62 
     63     /**
     64      * Constructor.
     65      *
     66      * @param context The context where the ListView associated with this
     67      *            SimpleListItemFactory is running
     68      * @param cursor The database cursor
     69      * @param collapsedGroupLayout resource identifier of a layout file that
     70      *            defines the views for collapsed groups.
     71      * @param expandedGroupLayout resource identifier of a layout file that
     72      *            defines the views for expanded groups.
     73      * @param childLayout resource identifier of a layout file that defines the
     74      *            views for all children.
     75      */
     76     public ResourceCursorTreeAdapter(Context context, Cursor cursor, int collapsedGroupLayout,
     77             int expandedGroupLayout, int childLayout) {
     78         this(context, cursor, collapsedGroupLayout, expandedGroupLayout, childLayout, childLayout);
     79     }
     80 
     81     /**
     82      * Constructor.
     83      *
     84      * @param context The context where the ListView associated with this
     85      *            SimpleListItemFactory is running
     86      * @param cursor The database cursor
     87      * @param groupLayout resource identifier of a layout file that defines the
     88      *            views for all groups.
     89      * @param childLayout resource identifier of a layout file that defines the
     90      *            views for all children.
     91      */
     92     public ResourceCursorTreeAdapter(Context context, Cursor cursor, int groupLayout,
     93             int childLayout) {
     94         this(context, cursor, groupLayout, groupLayout, childLayout, childLayout);
     95     }
     96 
     97     @Override
     98     public View newChildView(Context context, Cursor cursor, boolean isLastChild,
     99             ViewGroup parent) {
    100         return mInflater.inflate((isLastChild) ? mLastChildLayout : mChildLayout, parent, false);
    101     }
    102 
    103     @Override
    104     public View newGroupView(Context context, Cursor cursor, boolean isExpanded, ViewGroup parent) {
    105         return mInflater.inflate((isExpanded) ? mExpandedGroupLayout : mCollapsedGroupLayout,
    106                 parent, false);
    107     }
    108 
    109 }
    110