Android example source code file (ResourceCursorTreeAdapter.java)

This example Android source code file (ResourceCursorTreeAdapter.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

android, content, cursor, database, layoutinflater, override, resourcecursortreeadapter, ui, view, viewgroup

The ResourceCursorTreeAdapter.java Android example source code

/*
 * 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.database.Cursor;
import android.view.View;
import android.view.ViewGroup;
import android.view.LayoutInflater;

/**
 * A fairly simple ExpandableListAdapter that creates views defined in an XML
 * file. You can specify the XML file that defines the appearance of the views.
 */
public abstract class ResourceCursorTreeAdapter extends CursorTreeAdapter {
    private int mCollapsedGroupLayout;
    private int mExpandedGroupLayout;
    private int mChildLayout;
    private int mLastChildLayout;
    private LayoutInflater mInflater;
    
    /**
     * Constructor.
     * 
     * @param context The context where the ListView associated with this
     *            SimpleListItemFactory is running
     * @param cursor The database cursor
     * @param collapsedGroupLayout resource identifier of a layout file that
     *            defines the views for collapsed groups.
     * @param expandedGroupLayout resource identifier of a layout file that
     *            defines the views for expanded groups.
     * @param childLayout resource identifier of a layout file that defines the
     *            views for all children but the last..
     * @param lastChildLayout resource identifier of a layout file that defines
     *            the views for the last child of a group.
     */
    public ResourceCursorTreeAdapter(Context context, Cursor cursor, int collapsedGroupLayout,
            int expandedGroupLayout, int childLayout, int lastChildLayout) {
        super(cursor, context);
        
        mCollapsedGroupLayout = collapsedGroupLayout;
        mExpandedGroupLayout = expandedGroupLayout;
        mChildLayout = childLayout;
        mLastChildLayout = lastChildLayout;
        
        mInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    /**
     * Constructor.
     * 
     * @param context The context where the ListView associated with this
     *            SimpleListItemFactory is running
     * @param cursor The database cursor
     * @param collapsedGroupLayout resource identifier of a layout file that
     *            defines the views for collapsed groups.
     * @param expandedGroupLayout resource identifier of a layout file that
     *            defines the views for expanded groups.
     * @param childLayout resource identifier of a layout file that defines the
     *            views for all children.
     */
    public ResourceCursorTreeAdapter(Context context, Cursor cursor, int collapsedGroupLayout,
            int expandedGroupLayout, int childLayout) {
        this(context, cursor, collapsedGroupLayout, expandedGroupLayout, childLayout, childLayout);
    }

    /**
     * Constructor.
     * 
     * @param context The context where the ListView associated with this
     *            SimpleListItemFactory is running
     * @param cursor The database cursor
     * @param groupLayout resource identifier of a layout file that defines the
     *            views for all groups.
     * @param childLayout resource identifier of a layout file that defines the
     *            views for all children.
     */
    public ResourceCursorTreeAdapter(Context context, Cursor cursor, int groupLayout,
            int childLayout) {
        this(context, cursor, groupLayout, groupLayout, childLayout, childLayout);
    }
    
    @Override
    public View newChildView(Context context, Cursor cursor, boolean isLastChild,
            ViewGroup parent) {
        return mInflater.inflate((isLastChild) ? mLastChildLayout : mChildLayout, parent, false);
    }

    @Override
    public View newGroupView(Context context, Cursor cursor, boolean isExpanded, ViewGroup parent) {
        return mInflater.inflate((isExpanded) ? mExpandedGroupLayout : mCollapsedGroupLayout,
                parent, false);
    }

}