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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
/*
* Copyright (C) 2009 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 com.android.camera;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.Closeable;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import android.content.ContentResolver;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.RectF;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.LayerDrawable;
import android.graphics.drawable.TransitionDrawable;
import android.net.Uri;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.widget.ImageView;
// A controller shows thumbnail picture on a button. The thumbnail picture
// corresponds to a URI of the original picture/video. The thumbnail bitmap
// and the URI can be saved to a file (and later loaded from it).
//
// public ThumbnailController(ImageView button)
// public void setData(Uri uri, Bitmap original)
// public void updateDisplayIfNeeded()
// public Uri getUri()
// public Bitmap getThumb()
// public boolean storeData(String filePath)
// public boolean loadData(String filePath)
//
public class ThumbnailController {
private static final String TAG = "ThumbnailController";
private ContentResolver mContentResolver;
private Uri mUri;
private Bitmap mThumb;
private ImageView mButton;
private Drawable mFrame;
private Drawable[] mThumbs;
private TransitionDrawable mThumbTransition;
private boolean mShouldAnimateThumb;
private Animation mShowButtonAnimation = new AlphaAnimation(0F, 1F);
private boolean mShouldAnimateButton;
// The "frame" is a drawable we want to put on top of the thumbnail.
public ThumbnailController(ImageView button, Drawable frame,
ContentResolver contentResolver) {
mButton = button;
mFrame = frame;
mContentResolver = contentResolver;
mShowButtonAnimation.setDuration(500);
}
public void setData(Uri uri, Bitmap original) {
// Make sure uri and original are consistently both null or both non-null.
if (uri == null || original == null) {
uri = null;
original = null;
}
mUri = uri;
updateThumb(original);
}
public Uri getUri() {
return mUri;
}
public Bitmap getThumb() {
return mThumb;
}
private static final int BUFSIZE = 4096;
// Stores the data from the specified file.
// Returns true for success.
public boolean storeData(String filePath) {
if (mUri == null) {
return false;
}
FileOutputStream f = null;
BufferedOutputStream b = null;
DataOutputStream d = null;
try {
f = new FileOutputStream(filePath);
b = new BufferedOutputStream(f, BUFSIZE);
d = new DataOutputStream(b);
d.writeUTF(mUri.toString());
mThumb.compress(Bitmap.CompressFormat.PNG, 100, d);
d.close();
} catch (IOException e) {
return false;
} finally {
closeSilently(f);
closeSilently(b);
closeSilently(d);
}
return true;
}
// Loads the data from the specified file.
// Returns true for success.
public boolean loadData(String filePath) {
FileInputStream f = null;
BufferedInputStream b = null;
DataInputStream d = null;
try {
f = new FileInputStream(filePath);
b = new BufferedInputStream(f, BUFSIZE);
d = new DataInputStream(b);
Uri uri = Uri.parse(d.readUTF());
Bitmap thumb = BitmapFactory.decodeStream(d);
setData(uri, thumb);
d.close();
} catch (IOException e) {
return false;
} finally {
closeSilently(f);
closeSilently(b);
closeSilently(d);
}
return true;
}
private void closeSilently(Closeable c) {
if (c != null) {
try {
c.close();
} catch (IOException e) {
// ignore
}
}
}
public void updateDisplayIfNeeded() {
if (mUri == null) {
mButton.setVisibility(View.INVISIBLE);
return;
}
if (mShouldAnimateButton) {
mButton.setVisibility(View.VISIBLE);
mButton.startAnimation(mShowButtonAnimation);
mShouldAnimateButton = false;
}
if (mShouldAnimateThumb) {
mThumbTransition.startTransition(500);
mShouldAnimateThumb = false;
}
}
private void updateThumb(Bitmap original) {
if (original == null) {
mThumb = null;
mThumbs = null;
return;
}
// Make the mini-thumb size smaller than the button size so that the image corners
// don't peek out from the rounded corners of the frame_thumb graphic:
final int PADDING_WIDTH = 12;
final int PADDING_HEIGHT = 12;
LayoutParams layoutParams = mButton.getLayoutParams();
final int miniThumbWidth = layoutParams.width - 2 * PADDING_WIDTH;
final int miniThumbHeight = layoutParams.height - 2 * PADDING_HEIGHT;
mThumb = ImageManager.extractMiniThumb(
original, miniThumbWidth, miniThumbHeight, false);
Drawable[] vignetteLayers = new Drawable[2];
vignetteLayers[0] = mFrame;
if (mThumbs == null) {
mThumbs = new Drawable[2];
mThumbs[1] = new BitmapDrawable(mThumb);
vignetteLayers[1] = mThumbs[1];
mShouldAnimateThumb = false;
} else {
mThumbs[0] = mThumbs[1];
mThumbs[1] = new BitmapDrawable(mThumb);
mThumbTransition = new TransitionDrawable(mThumbs);
vignetteLayers[1] = mThumbTransition;
mShouldAnimateThumb = true;
}
LayerDrawable mVignette = new LayerDrawable(vignetteLayers);
mVignette.setLayerInset(1, PADDING_WIDTH, PADDING_HEIGHT,
PADDING_WIDTH, PADDING_HEIGHT);
mButton.setImageDrawable(mVignette);
if (mButton.getVisibility() != View.VISIBLE) {
mShouldAnimateButton = true;
}
}
public boolean isUriValid() {
if (mUri == null) return false;
try {
mContentResolver.openFileDescriptor(mUri, "r").close();
} catch (Exception ex) {
return false;
}
return true;
}
}
|
