1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/***
Copyright (c) 2008-2009 CommonsWare, LLC
Portions (c) 2009 Google, Inc.
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 net.sourceforge.subsonic.androidapp.util;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import java.util.ArrayList;
import java.util.List;
/**
* Adapter that simply returns row views from a list.
* <p/>
* If you supply a size, you must implement newView(), to
* create a required view. The adapter will then cache these
* views.
* <p/>
* If you supply a list of views in the constructor, that
* list will be used directly. If any elements in the list
* are null, then newView() will be called just for those
* slots.
* <p/>
* Subclasses may also wish to override areAllItemsEnabled()
* (default: false) and isEnabled() (default: false), if some
* of their rows should be selectable.
* <p/>
* It is assumed each view is unique, and therefore will not
* get recycled.
* <p/>
* Note that this adapter is not designed for long lists. It
* is more for screens that should behave like a list. This
* is particularly useful if you combine this with other
* adapters (e.g., SectionedAdapter) that might have an
* arbitrary number of rows, so it all appears seamless.
*/
public class SackOfViewsAdapter extends BaseAdapter {
private List<View> views = null;
/**
* Constructor creating an empty list of views, but with
* a specified count. Subclasses must override newView().
*/
public SackOfViewsAdapter(int count) {
super();
views = new ArrayList<View>(count);
for (int i = 0; i < count; i++) {
views.add(null);
}
}
/**
* Constructor wrapping a supplied list of views.
* Subclasses must override newView() if any of the elements
* in the list are null.
*/
public SackOfViewsAdapter(List<View> views) {
for (View view : views) {
view.setLayoutParams(new ListView.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
}
this.views = views;
}
/**
* Get the data item associated with the specified
* position in the data set.
*
* @param position Position of the item whose data we want
*/
@Override
public Object getItem(int position) {
return (views.get(position));
}
/**
* How many items are in the data set represented by this
* Adapter.
*/
@Override
public int getCount() {
return (views.size());
}
/**
* Returns the number of types of Views that will be
* created by getView().
*/
@Override
public int getViewTypeCount() {
return (getCount());
}
/**
* Get the type of View that will be created by getView()
* for the specified item.
*
* @param position Position of the item whose data we want
*/
@Override
public int getItemViewType(int position) {
return (position);
}
/**
* Are all items in this ListAdapter enabled? If yes it
* means all items are selectable and clickable.
*/
@Override
public boolean areAllItemsEnabled() {
return (false);
}
/**
* Returns true if the item at the specified position is
* not a separator.
*
* @param position Position of the item whose data we want
*/
@Override
public boolean isEnabled(int position) {
return (false);
}
/**
* Get a View that displays the data at the specified
* position in the data set.
*
* @param position Position of the item whose data we want
* @param convertView View to recycle, if not null
* @param parent ViewGroup containing the returned View
*/
@Override
public View getView(int position, View convertView,
ViewGroup parent) {
View result = views.get(position);
if (result == null) {
result = newView(position, parent);
views.set(position, result);
}
return (result);
}
/**
* Get the row id associated with the specified position
* in the list.
*
* @param position Position of the item whose data we want
*/
@Override
public long getItemId(int position) {
return (position);
}
/**
* Create a new View to go into the list at the specified
* position.
*
* @param position Position of the item whose data we want
* @param parent ViewGroup containing the returned View
*/
protected View newView(int position, ViewGroup parent) {
throw new RuntimeException("You must override newView()!");
}
}
|
