1/* 2 * Copyright (C) 2011 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.support.v4.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 * Static library support version of the framework's {@link android.widget.ResourceCursorAdapter}. 27 * Used to write apps that run on platforms prior to Android 3.0. When running 28 * on Android 3.0 or above, this implementation is still used; it does not try 29 * to switch to the framework's implementation. See the framework SDK 30 * documentation for a class overview. 31 */ 32public abstract class ResourceCursorAdapter extends CursorAdapter { 33 private int mLayout; 34 35 private int mDropDownLayout; 36 37 private LayoutInflater mInflater; 38 39 /** 40 * Constructor the enables auto-requery. 41 * 42 * @deprecated This option is discouraged, as it results in Cursor queries 43 * being performed on the application's UI thread and thus can cause poor 44 * responsiveness or even Application Not Responding errors. As an alternative, 45 * use {@link android.app.LoaderManager} with a {@link android.content.CursorLoader}. 46 * 47 * @param context The context where the ListView associated with this adapter is running 48 * @param layout resource identifier of a layout file that defines the views 49 * for this list item. Unless you override them later, this will 50 * define both the item views and the drop down views. 51 */ 52 @Deprecated 53 public ResourceCursorAdapter(Context context, int layout, Cursor c) { 54 super(context, c); 55 mLayout = mDropDownLayout = layout; 56 mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 57 } 58 59 /** 60 * Constructor with default behavior as per 61 * {@link CursorAdapter#CursorAdapter(Context, Cursor, boolean)}; it is recommended 62 * you not use this, but instead {@link #ResourceCursorAdapter(Context, int, Cursor, int)}. 63 * When using this constructor, {@link #FLAG_REGISTER_CONTENT_OBSERVER} 64 * will always be set. 65 * 66 * @param context The context where the ListView associated with this adapter is running 67 * @param layout resource identifier of a layout file that defines the views 68 * for this list item. Unless you override them later, this will 69 * define both the item views and the drop down views. 70 * @param c The cursor from which to get the data. 71 * @param autoRequery If true the adapter will call requery() on the 72 * cursor whenever it changes so the most recent 73 * data is always displayed. Using true here is discouraged. 74 */ 75 public ResourceCursorAdapter(Context context, int layout, Cursor c, boolean autoRequery) { 76 super(context, c, autoRequery); 77 mLayout = mDropDownLayout = layout; 78 mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 79 } 80 81 /** 82 * Standard constructor. 83 * 84 * @param context The context where the ListView associated with this adapter is running 85 * @param layout Resource identifier of a layout file that defines the views 86 * for this list item. Unless you override them later, this will 87 * define both the item views and the drop down views. 88 * @param c The cursor from which to get the data. 89 * @param flags Flags used to determine the behavior of the adapter, 90 * as per {@link CursorAdapter#CursorAdapter(Context, Cursor, int)}. 91 */ 92 public ResourceCursorAdapter(Context context, int layout, Cursor c, int flags) { 93 super(context, c, flags); 94 mLayout = mDropDownLayout = layout; 95 mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 96 } 97 98 /** 99 * Inflates view(s) from the specified XML file. 100 * 101 * @see android.widget.CursorAdapter#newView(android.content.Context, 102 * android.database.Cursor, ViewGroup) 103 */ 104 @Override 105 public View newView(Context context, Cursor cursor, ViewGroup parent) { 106 return mInflater.inflate(mLayout, parent, false); 107 } 108 109 @Override 110 public View newDropDownView(Context context, Cursor cursor, ViewGroup parent) { 111 return mInflater.inflate(mDropDownLayout, parent, false); 112 } 113 114 /** 115 * <p>Sets the layout resource of the item views.</p> 116 * 117 * @param layout the layout resources used to create item views 118 */ 119 public void setViewResource(int layout) { 120 mLayout = layout; 121 } 122 123 /** 124 * <p>Sets the layout resource of the drop down views.</p> 125 * 126 * @param dropDownLayout the layout resources used to create drop down views 127 */ 128 public void setDropDownViewResource(int dropDownLayout) { 129 mDropDownLayout = dropDownLayout; 130 } 131} 132