/
PhotoFunctions.java
186 lines (158 loc) · 6.32 KB
/
PhotoFunctions.java
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
package com.eralp.profilephoto;
/**
* Created by EralpPC on 22.2.2015.
*/
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import android.content.Context;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.media.ExifInterface;
import android.net.Uri;
import android.provider.MediaStore;
public class PhotoFunctions {
private static final int MAX_IMAGE_DIMENSION = 1000;
public static byte[] bitmapFromUriToByteArray(Context context, Uri photoUri)
throws IOException {
Bitmap srcBitmap = bitmapFromUri(context, photoUri);
String type = context.getContentResolver().getType(photoUri);
byte[] bMapArray = bitmapToByteArray(srcBitmap, type);
return bMapArray;
}
public static Bitmap bitmapFromUri(Context context, Uri photoUri)
throws FileNotFoundException, IOException {
InputStream is = context.getContentResolver().openInputStream(photoUri);
BitmapFactory.Options dbo = new BitmapFactory.Options();
dbo.inJustDecodeBounds = true;
BitmapFactory.decodeStream(is, null, dbo);
is.close();
int rotatedWidth, rotatedHeight;
int orientation = 0;
if (photoUri.toString().contains("content:/")){
orientation = getOrientation(context, photoUri);
} else {
int orientationFormExif = getOrientationFromExif(photoUri, context);
orientation = decodeExifOrientation(orientationFormExif);
}
if (orientation == 90 || orientation == 270) {
rotatedWidth = dbo.outHeight;
rotatedHeight = dbo.outWidth;
} else {
rotatedWidth = dbo.outWidth;
rotatedHeight = dbo.outHeight;
}
Bitmap srcBitmap = readScaledBitmapFromUri(photoUri, context,
rotatedWidth, rotatedHeight);
srcBitmap = setProperOrientation(orientation, srcBitmap);
return srcBitmap;
}
public static byte[] bitmapToByteArray(Bitmap srcBitmap, String type)
throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
if (type.equals("image/png")) {
srcBitmap.compress(Bitmap.CompressFormat.PNG, 100, baos);
} else if (type.equals("image/jpg") || type.equals("image/jpeg")) {
srcBitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
}
byte[] bMapArray = baos.toByteArray();
baos.close();
return bMapArray;
}
private static Bitmap setProperOrientation(int orientation, Bitmap srcBitmap) {
if (orientation > 0) {
Matrix matrix = new Matrix();
matrix.postRotate(orientation);
srcBitmap = Bitmap.createBitmap(srcBitmap, 0, 0,
srcBitmap.getWidth(), srcBitmap.getHeight(), matrix, true);
}
return srcBitmap;
}
private static Bitmap readScaledBitmapFromUri(Uri photoUri,Context context, int width, int height)
throws FileNotFoundException, IOException {
InputStream is;
Bitmap srcBitmap;
is = context.getContentResolver().openInputStream(photoUri);
if (width > MAX_IMAGE_DIMENSION || height > MAX_IMAGE_DIMENSION) {
float ratio = calculateScaleRatio(width, height);
srcBitmap = readRoughScaledBitmap(is, ratio);
ratio = calculateScaleRatio(srcBitmap.getWidth(),
srcBitmap.getHeight());
srcBitmap = scaleBitmap(srcBitmap, ratio);
} else {
srcBitmap = BitmapFactory.decodeStream(is);
}
is.close();
return srcBitmap;
}
private static float calculateScaleRatio(int width, int height) {
float widthRatio = ((float) width) / ((float) MAX_IMAGE_DIMENSION);
float heightRatio = ((float) height) / ((float) MAX_IMAGE_DIMENSION);
float maxRatio = Math.max(widthRatio, heightRatio);
return maxRatio;
}
private static Bitmap readRoughScaledBitmap(InputStream is, float maxRatio) {
Bitmap result;
// Create the bitmap from file
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = (int) maxRatio;
result = BitmapFactory.decodeStream(is, null, options);
return result;
}
private static Bitmap scaleBitmap(Bitmap bitmap, float ratio) {
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Matrix matrix = new Matrix();
matrix.postScale(1f / ratio, 1f / ratio);
Bitmap result = Bitmap.createBitmap(bitmap, 0, 0, width, height,
matrix, true);
return result;
}
private static int getOrientation(Context context, Uri photoUri) {
/* it's on the external media. */
Cursor cursor = context.getContentResolver().query(photoUri,
new String[] { MediaStore.Images.ImageColumns.ORIENTATION },
null, null, null);
if (cursor.getCount() != 1) {
return -1;
}
cursor.moveToFirst();
return cursor.getInt(0);
}
private static int getOrientationFromExif(Uri imageUri, Context context) {
int orientation = -1;
File imageFile = new File(imageUri.getPath());
try {
ExifInterface exif;
exif = new ExifInterface(imageFile.getAbsolutePath());
orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION,
ExifInterface.ORIENTATION_NORMAL);
} catch (IOException e) {
e.printStackTrace();
}
return orientation;
}
private static int decodeExifOrientation(int orientation) {
switch (orientation) {
case ExifInterface.ORIENTATION_NORMAL:
orientation = 0;
break;
case ExifInterface.ORIENTATION_ROTATE_90:
orientation = 90;
break;
case ExifInterface.ORIENTATION_ROTATE_180:
orientation = 180;
break;
case ExifInterface.ORIENTATION_ROTATE_270:
orientation = 270;
break;
default:
break;
}
return orientation;
}
}