Check if selected file using edmodo cropper library is an image or not

Question

While selecting image using the inbuilt CropImageActivity, the picker shows option to select files (of any type) from some external app (WPS Office for my case). So when I select a pdf file (say), onSetImageUriComplete() doesn't cause any error.

@Override
    public void onSetImageUriComplete(CropImageView cropImageView, Uri uri, Exception error) {
        progressView.setVisibility(View.INVISIBLE);
        if (error != null) {
            Log.e(LOG_TAG, "Failed to  load image for cropping", error);
            AndroidUtils.showToast("Unable to upload", this);
            finish();
        }
    }

Error is not null for such cases. So, nothing shows up in UI and I don't have any way to know if it is an image or not.

I tried checking the extension from URI but in some models (One Plus X for my case), uri doesn't necessarily contain an extension.

I also tried loading the uri into a File and then check using this code:

public static boolean isImage(File file) {
        if (file == null || !file.exists()) {
            return false;
        }
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(file.getPath(), options);
        return options.outWidth != -1 && options.outHeight != -1;
    }

But, for One Plus X it again returns false. Is there any other way (which is not resource intensive) to check if the fetched file is an image or not?

score 1 · Accepted Answer · answered Feb 13 '17 at 21:17

1

So, nothing shows up in UI and I don't have any way to know if it is an image or not.

Call getType() on a ContentResolver, passing in the Uri. If the MIME type starts with image/, it is an image.

answered Feb 13 '17 at 21:17

CommonsWare

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You mean this: `String mimeType = context.getContentResolver().getType(imageUri);`. This returns null for me – Avinash Gupta Feb 13 '17 at 21:31
@AvinashGupta: Really? What is the value of the `Uri`? – CommonsWare Feb 13 '17 at 21:33
file:///storage/emulated/0/DCIM/Camera/IMG_20170122_162307.jpg – Avinash Gupta Feb 13 '17 at 21:41
OK, I thought `getType()` would handle `file` schemes as well as `content` schemes. Use `MimeTypeMap` to get the MIME type. – CommonsWare Feb 13 '17 at 21:44
If `getType()` works for `content` schemes, then probably I got the solution. Above methods which I mentioned are already working for `file` schemes. Thanks! I'll confirm this for `content` – Avinash Gupta Feb 13 '17 at 21:53

Check if selected file using edmodo cropper library is an image or not

1 Answers1