Created
July 24, 2012 13:37
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optimize bitmap
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| //decodes image and scales it to reduce memory consumption | |
| private Bitmap decodeFile(File f){ | |
| try { | |
| //Decode image size | |
| BitmapFactory.Options o = new BitmapFactory.Options(); | |
| o.inJustDecodeBounds = true; | |
| BitmapFactory.decodeStream(new FileInputStream(f),null,o); | |
| //The new size we want to scale to | |
| final int REQUIRED_SIZE=70; | |
| //Find the correct scale value. It should be the power of 2. | |
| int width_tmp=o.outWidth, height_tmp=o.outHeight; | |
| int scale=1; | |
| while(true){ | |
| if(width_tmp/2<REQUIRED_SIZE || height_tmp/2<REQUIRED_SIZE) | |
| break; | |
| width_tmp/=2; | |
| height_tmp/=2; | |
| scale*=2; | |
| } | |
| //Decode with inSampleSize | |
| BitmapFactory.Options o2 = new BitmapFactory.Options(); | |
| o2.inSampleSize=scale; | |
| return BitmapFactory.decodeStream(new FileInputStream(f), null, o2); | |
| } catch (FileNotFoundException e) {} | |
| return null; | |
| } |
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