如何了解位图照片是垂直还是水平的？

Question

I did not find what I really need on google and stackoverflow, I want to understand that a photo which I just capture from the camera is vertical or horizontal, Code:

path_img= ("image_url");   
Bitmap  photo = null ;
photo = BitmapFactory.decodeFile(path_img );
int imageHeight = photo.getHeight();
int imageWidth = photo.getWidth();

When I capture the photo on my phone imageHeight and imageWidht always same I mean if I capture photo vertical or horizantal it is always 960x1280, I want to horizantal photo size is (width:960 height:1280) and vertical is (width:1280 height:960) thanks

Answer 1

use the ExifInterface to get the orientation as the following :

File imageFile = new File(imagePath);

            ExifInterface exif = new ExifInterface(imageFile.getAbsolutePath());
                            int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);

            boolean isVertical = true ; 

            switch (orientation) {
                case ExifInterface.ORIENTATION_ROTATE_270:
                    isVertical = false ; 
                    break;
                case ExifInterface.ORIENTATION_ROTATE_90:
                    isVertical =false ; 
                    break;
            }

and so on for the all what you need from the Constants that are in the ExifInterface documentation .

then you can try to do somthing as the following using the Picasso API :

int imageWidth , imageHeight = 0 ; 

if(isVertical ) {
imageWidth =1280;
imageHeight=960;
}else if (!isVertical ){
imageWidth =960;
imageHeight=1280;
}

Picasso.with(getActivity()) 
            .load(imageUrl) 
            .placeholder(R.drawable.placeholder) 
            .error(R.drawable.error) 
            .resize(imageWidth , imageHeight)
            .centerInside() 
            .into(imageView);

and please give me some feedback .

Hope taht helps .

Answer 2

I guess you could just do a simple test of the height and width like:

if(imageHeight > imageWidth){
    //Image is horizontal (according to your comments, horizontal photos are usually wider than the hight)
}
elseif(imageHeight > imageWidth){
    //Image is horizontal (again, according to your comments)
}