我想优化图像文件的大小,像whatsapp和Facebook正在做的.我已经发送了5MB的图片,whatsapp,并且收到的图像大小为80KB.收到的图像与原始图像相似,但分辨率小于原始图像.
我尝试几乎所有的源代码的android图像压缩可用在stackoverflow,但不适用于我.然后我碰到this link来优化图像,这是做好的工作,但仍然没有得到像whatsapp的结果.
如何在不降低图像质量的情况下实现最大图像压缩,就像whatsapp所做的那样？
用源代码回答将是非常有帮助的.
提前致谢.
解决方法
你需要解码图像(位图)
这是代码.
public Bitmap decodeFile(String path) {
// Decode image size
int orientation;
try {
if (path == null) {
return null ;
}
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
// Find the correct scale value. It should be the power of 2.
final int required_SIZE = 70;
int width_tmp = o.outWidth,height_tmp = o.outHeight;
int scale = 0;
while (true) {
if (width_tmp / 2 < required_SIZE
|| height_tmp / 2 < required_SIZE)
break;
width_tmp /= 2;
height_tmp /= 2;
scale++;
}
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
Bitmap bm = BitmapFactory.decodeFile(path,o2);
Bitmap bitmap = bm;
ExifInterface exif = new ExifInterface(path);
orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION,1);
Log.e("orientation","" + orientation);
bitmap = Bitmap.createBitmap(bm,bm.getWidth(),bm.getHeight(),null,true);
ImageViewChooseImage.setImageBitmap(bitmap);
bitmapfinal = bitmap;
return bitmap ;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
