圖片等比例縮放

圖片的等比例縮放，第一個參數是圖片路徑，第二個是最終所需要圖片的(寬高裡取值最大的)的最大值
[java] // 限制值MaxSize*（2/3）=實際使用值的比較值IMAGE_MAX_SIZE  
    // 例如：限制圖片大小為400，則實際使用的比較值應為400*（2/3）  
    // 260*2/3=390  
    public static Bitmap decodeFile(String path, int MaxSize) { 
 
        File f = new File(path); 
        int IMAGE_MAX_SIZE = MaxSize * 2 / 3; 
        Bitmap b = null; 
        try { 
            // Decode image size  
            BitmapFactory.Options o = new BitmapFactory.Options(); 
            o.inJustDecodeBounds = true; 
 
            //FileInputStream fis = new FileInputStream(f);  
            //BitmapFactory.decodeStream(fis, null, o);  
 
            //fis.close();  
 
            double scale = 1; 
 
            if (o.outHeight > IMAGE_MAX_SIZE || o.outWidth > IMAGE_MAX_SIZE) { 
                scale = Math.pow(2, (int) Math.round(Math.log(IMAGE_MAX_SIZE / (double) Math.max(o.outHeight, o.outWidth)) / Math.log(0.5))); 
 
            } 
 
            // Decode with inSampleSize  
            BitmapFactory.Options o2 = new BitmapFactory.Options(); 
            o2.inSampleSize = (int) scale; 
            FileInputStream fis = new FileInputStream(f); 
 
            b = BitmapFactory.decodeStream(fis, null, o2); 
 
            fis.close(); 
        } catch (FileNotFoundException e) { 
        } catch (IOException e) { 
            // TODO Auto-generated catch block  
            e.printStackTrace(); 
        } 
        return b; 
    } 

摘自 agods–足跡