1/*
2 * Copyright (C) 2007 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
17package android.widget;
18
19import android.content.Context;
20import android.database.Cursor;
21import android.view.View;
22import android.view.ViewGroup;
23import android.view.LayoutInflater;
24
25
26/**
27 * An easy adapter that creates views defined in an XML file. You can specify
28 * the XML file that defines the appearance of the views.
29 */
30public abstract class ResourceCursorAdapter extends CursorAdapter {
31    private int mLayout;
32
33    private int mDropDownLayout;
34
35    private LayoutInflater mInflater;
36
37    /**
38     * Constructor the enables auto-requery.
39     *
40     * @deprecated This option is discouraged, as it results in Cursor queries
41     * being performed on the application's UI thread and thus can cause poor
42     * responsiveness or even Application Not Responding errors.  As an alternative,
43     * use {@link android.app.LoaderManager} with a {@link android.content.CursorLoader}.
44     *
45     * @param context The context where the ListView associated with this adapter is running
46     * @param layout resource identifier of a layout file that defines the views
47     *            for this list item.  Unless you override them later, this will
48     *            define both the item views and the drop down views.
49     */
50    @Deprecated
51    public ResourceCursorAdapter(Context context, int layout, Cursor c) {
52        super(context, c);
53        mLayout = mDropDownLayout = layout;
54        mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
55    }
56
57    /**
58     * Constructor with default behavior as per
59     * {@link CursorAdapter#CursorAdapter(Context, Cursor, boolean)}; it is recommended
60     * you not use this, but instead {@link #ResourceCursorAdapter(Context, int, Cursor, int)}.
61     * When using this constructor, {@link #FLAG_REGISTER_CONTENT_OBSERVER}
62     * will always be set.
63     *
64     * @param context The context where the ListView associated with this adapter is running
65     * @param layout resource identifier of a layout file that defines the views
66     *            for this list item.  Unless you override them later, this will
67     *            define both the item views and the drop down views.
68     * @param c The cursor from which to get the data.
69     * @param autoRequery If true the adapter will call requery() on the
70     *                    cursor whenever it changes so the most recent
71     *                    data is always displayed.  Using true here is discouraged.
72     */
73    public ResourceCursorAdapter(Context context, int layout, Cursor c, boolean autoRequery) {
74        super(context, c, autoRequery);
75        mLayout = mDropDownLayout = layout;
76        mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
77    }
78
79    /**
80     * Standard constructor.
81     *
82     * @param context The context where the ListView associated with this adapter is running
83     * @param layout Resource identifier of a layout file that defines the views
84     *            for this list item.  Unless you override them later, this will
85     *            define both the item views and the drop down views.
86     * @param c The cursor from which to get the data.
87     * @param flags Flags used to determine the behavior of the adapter,
88     * as per {@link CursorAdapter#CursorAdapter(Context, Cursor, int)}.
89     */
90    public ResourceCursorAdapter(Context context, int layout, Cursor c, int flags) {
91        super(context, c, flags);
92        mLayout = mDropDownLayout = layout;
93        mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
94    }
95
96    /**
97     * Inflates view(s) from the specified XML file.
98     *
99     * @see android.widget.CursorAdapter#newView(android.content.Context,
100     *      android.database.Cursor, ViewGroup)
101     */
102    @Override
103    public View newView(Context context, Cursor cursor, ViewGroup parent) {
104        return mInflater.inflate(mLayout, parent, false);
105    }
106
107    @Override
108    public View newDropDownView(Context context, Cursor cursor, ViewGroup parent) {
109        return mInflater.inflate(mDropDownLayout, parent, false);
110    }
111
112    /**
113     * <p>Sets the layout resource of the item views.</p>
114     *
115     * @param layout the layout resources used to create item views
116     */
117    public void setViewResource(int layout) {
118        mLayout = layout;
119    }
120
121    /**
122     * <p>Sets the layout resource of the drop down views.</p>
123     *
124     * @param dropDownLayout the layout resources used to create drop down views
125     */
126    public void setDropDownViewResource(int dropDownLayout) {
127        mDropDownLayout = dropDownLayout;
128    }
129}
130