图片等比例缩放
图片的等比例缩放,第一个参数是图片路径,第二个是最终所需要图片的(宽高里取值最大的)的最大值[java] // 限制值MaxSize*(2/3)=实际使用值的比较值IMAGE_MAX_SIZE
// 例如:限制图片大小为400,则实际使用的比较值应为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--足迹
补充:移动开发 , Android ,