把图片的图标置小得到缩略图

把图片的图标放小得到缩略图

int phSize;float PIX_SCALE;PIX_SCALE = this.getResources().getDisplayMetrics().density;phSize = (PHO_DIP * (int) (PIX_SCALE + 0.5f));public Drawable scale(File file) {BitmapFactory.Options opt = new BitmapFactory.Options();opt.inPreferredConfig = Bitmap.Config.RGB_565;opt.inJustDecodeBounds = true;BitmapFactory.decodeFile(file.getAbsolutePath(), opt);opt.inJustDecodeBounds = false;if (opt.outWidth > opt.outHeight) {opt.inSampleSize = opt.outWidth / phSize;;} else {opt.inSampleSize = opt.outHeight / phSize;}Bitmap b = BitmapFactory.decodeFile(file.getAbsolutePath(), opt);Drawable d = new BitmapDrawable(ManagerActivity.this.getResources(), b);return d;}

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