1 public void transImage(String fromFile, String toFile, int width, int height, int quality)
2
3 {
4
5 try
6
7 {
8
9 Bitmap bitmap = BitmapFactory.decodeFile(fromFile);
10
11 int bitmapWidth = bitmap.getWidth();
12
13 int bitmapHeight = bitmap.getHeight();
14
15 // 缩放图片的尺寸
16
17 float scaleWidth = (float) width / bitmapWidth;
18
19 float scaleHeight = (float) height / bitmapHeight;
20
21 Matrix matrix = new Matrix();
22
23 matrix.postScale(scaleWidth, scaleHeight);
24
25 // 产生缩放后的Bitmap对象
26
27 Bitmap resizeBitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmapWidth, bitmapHeight, matrix, false);
28
29 // save file
30
31 File myCaptureFile = new File(toFile);
32
33 FileOutputStream out = new FileOutputStream(myCaptureFile);
34
35 if(resizeBitmap.compress(Bitmap.CompressFormat.JPEG, quality, out)){
36
37 out.flush();
38
39 out.close();
40
41 }
42
43 if(!bitmap.isRecycled()){
44
45 bitmap.recycle();//记得释放资源，否则会内存溢出
46
47 }
48
49 if(!resizeBitmap.isRecycled()){
50
51 resizeBitmap.recycle();
52
53 }
54
55
56
57 }
58
59 catch (FileNotFoundException e)
60
61 {
62
63 e.printStackTrace();
64
65 }
66
67 catch (IOException ex)
68
69 {
70
71 ex.printStackTrace();
72
73 }
74
75 }
http://www.wizzer.cn/?p=1792
