apps/oi-filemanager/FileManager/src/org/openintents/filemanager/util/ImageUtils.java

   1 package org.openintents.filemanager.util;\r
   2 \r
   3 import android.graphics.Bitmap;\r
   4 import android.graphics.Canvas;\r
   5 import android.graphics.Matrix;\r
   6 import android.graphics.drawable.BitmapDrawable;\r
   7 import android.graphics.drawable.Drawable;\r
   8 \r
   9 public final class ImageUtils {\r
  10 \r
  11         /**\r
  12          * Resizes specific a Bitmap with keeping ratio.\r
  13          */\r
  14         public static Bitmap resizeBitmap(Bitmap drawable, int desireWidth,\r
  15                         int desireHeight) {\r
  16                 int width = drawable.getWidth();\r
  17                 int height = drawable.getHeight();\r
  18 \r
  19                 if (0 < width && 0 < height && desireWidth < width\r
  20                                 || desireHeight < height) {\r
  21                         // Calculate scale\r
  22                         float scale;\r
  23                         if (width < height) {\r
  24                                 scale = (float) desireHeight / (float) height;\r
  25                                 if (desireWidth < width * scale) {\r
  26                                         scale = (float) desireWidth / (float) width;\r
  27                                 }\r
  28                         } else {\r
  29                                 scale = (float) desireWidth / (float) width;\r
  30                         }\r
  31 \r
  32                         // Draw resized image\r
  33                         Matrix matrix = new Matrix();\r
  34                         matrix.postScale(scale, scale);\r
  35                         Bitmap bitmap = Bitmap.createBitmap(drawable, 0, 0, width, height,\r
  36                                         matrix, true);\r
  37                         Canvas canvas = new Canvas(bitmap);\r
  38                         canvas.drawBitmap(bitmap, 0, 0, null);\r
  39 \r
  40                         drawable = bitmap;\r
  41                 }\r
  42 \r
  43                 return drawable;\r
  44         }\r
  45 \r
  46         /**\r
  47          * Resizes specific a Drawable with keeping ratio.\r
  48          */\r
  49         public static Drawable resizeDrawable(Drawable drawable, int desireWidth,\r
  50                         int desireHeight) {\r
  51                 int width = drawable.getIntrinsicWidth();\r
  52                 int height = drawable.getIntrinsicHeight();\r
  53 \r
  54                 if (0 < width && 0 < height && desireWidth < width\r
  55                                 || desireHeight < height) {\r
  56                         drawable = new BitmapDrawable(resizeBitmap(\r
  57                                         ((BitmapDrawable) drawable).getBitmap(), desireWidth,\r
  58                                         desireHeight));\r
  59                 }\r
  60 \r
  61                 return drawable;\r
  62         }\r
  63 \r
  64 }\r