Android: Bitmaps loaded from gallery are rotated in ImageView

androidbitmapgalleryrotation

When I load an image from the media gallery into a Bitmap, everything is working fine, except that pictures that were shot with the camera while holding the phone vertically, are rotated so that I always get a horizontal picture even though it appears vertical in the gallery.
Why is that and how can I load it correctly?

Best Answer

So, as an example...

First you need to create an ExifInterface:

ExifInterface exif = new ExifInterface(filename);

You can then grab the orientation of the image:

orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, 1);

Here's what the orientation values mean: http://sylvana.net/jpegcrop/exif_orientation.html

So, the most important values are 3, 6 and 8. If the orientation is ExifInterface.ORIENTATION_ROTATE_90 (which is 6), for example, you can rotate the image like this:

Matrix matrix = new Matrix();
matrix.postRotate(90);
rotatedBitmap = Bitmap.createBitmap(sourceBitmap, 0, 0, sourceBitmap.getWidth(), sourceBitmap.getHeight(), matrix, true);

That's just a quick example, though. I'm sure there are other ways of performing the actual rotation. But you will find those on StackOverflow as well.

Related Solutions

Android – How to stop EditText from gaining focus at Activity startup in Android

Excellent answers from Luc and Mark. However, a good code sample is missing. Adding the tags android:focusableInTouchMode="true" and android:focusable="true" to the parent layout (e.g. LinearLayout or ConstraintLayout) like in the following example, will fix the problem.

<!-- Dummy item to prevent AutoCompleteTextView from receiving focus -->
<LinearLayout
    android:focusable="true" 
    android:focusableInTouchMode="true"
    android:layout_width="0px" 
    android:layout_height="0px"/>

<!-- :nextFocusUp and :nextFocusLeft have been set to the id of this component
to prevent the dummy from receiving focus again -->
<AutoCompleteTextView android:id="@+id/autotext"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content"
    android:nextFocusUp="@id/autotext" 
    android:nextFocusLeft="@id/autotext"/>

Android 4.3 crop gallery resultCode Cancel

Have you considered just using a library like this one:

https://github.com/biokys/cropimage

I find the com.android.camera.action.CROP can sometimes behave differently from phone to phone and is not always available, so it could cause some problems for you anyway if you are looking to release it.

UPDATE:

I have tested the above library with Android 4.3 and it works with no problem. You just need to add the library to your project.

You can then write your method in a very similar way:

private void performCrop(Uri picUri) {
//you have to convert picUri to string and remove the "file://" to work as a path for this library
String path = picUri.toString().replaceAll("file://", "");

try {
    int aspectX = 750;
    int aspectY = 1011;

    Intent intent = new Intent(this, CropImage.class);
    //send the path to CropImage intent to get the photo you have just taken or selected from gallery
    intent.putExtra(CropImage.IMAGE_PATH, path);

    intent.putExtra(CropImage.SCALE, true);

    intent.putExtra("aspectX", aspectX);
    intent.putExtra("aspectY", aspectY);

    intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(mCurrentPhotoPath)));

    startActivityForResult(intent, CROP);
}
catch (ActivityNotFoundException anfe) {
    String errorMessage = "Your device doesn't support the crop action!";
    Toast toast = Toast.makeText(this, errorMessage, Toast.LENGTH_SHORT);
    toast.show();
}

}

Best Answer

Related Solutions

Android – How to stop EditText from gaining focus at Activity startup in Android

Android 4.3 crop gallery resultCode Cancel

Related Topic