Android: source code for Image Compression with a specified resolution and resolution

1 public void transImage (String fromFile, String toFile, int width, int height, int quality)
2
3 {
4
5 try
6
7 {
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9 Bitmap bitmap = BitmapFactory. decodeFile (fromFile );
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11 int bitmapWidth = bitmap. getWidth ();
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13 int bitmapHeight = bitmap. getHeight ();
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15 // resize the image
16
17 float scaleWidth = (float) width/bitmapWidth;
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19 float scaleHeight = (float) height/bitmapHeight;
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21 Matrix matrix = new Matrix ();
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23 matrix. postScale (scaleWidth, scaleHeight );
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25 // generate a scaled Bitmap object
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27 Bitmap resizeBitmap = Bitmap. createBitmap (bitmap, 0, 0, bitmapWidth, bitmapHeight, matrix, false );
28
29 // save file
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31 File myCaptureFile = new File (toFile );
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33 FileOutputStream out = new FileOutputStream (myCaptureFile );
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35 if (resizeBitmap. compress (Bitmap. CompressFormat. JPEG, quality, out )){
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37 out. flush ();
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39 out. close ();
40
41}
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43 if (! Bitmap. isRecycled ()){
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45 bitmap. recycle (); // remember to release the resource; otherwise, the memory will overflow.
46
47}
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49 if (! ResizeBitmap. isRecycled ()){
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51 resizeBitmap. recycle ();
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53}
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55
56
57}
58
59 catch (FileNotFoundException e)
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61 {
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63 e. printStackTrace ();
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65}
66
67 catch (IOException ex)
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69 {
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71 ex. printStackTrace ();
72
73}
74
75}

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