Attempt to invoke virtual method 'boolean android.graphics.Bitmap.isMutable()' on a null object reference

Question

When click pic directly from app it's crash from this lines. this problem is getting only on Android 11, working fine on other devices

Errors:

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.graphics.Bitmap.isMutable()' on a null object reference at com.my.collegemaker.collagelib.Utility.decodeFile(Utility.java:115) at com.my.collegemaker.collagelib.CollageActivity$BitmapWorkerTask.doInBackground(CollageActivity.java:262) at com.my.collegemaker.collagelib.CollageActivity$BitmapWorkerTask.doInBackground(CollageActivity.java:227)

@SuppressLint({"NewApi"})
public static Bitmap decodeFile(String path, int requiredSize, boolean isScrapBook) {
    try {
        File f = new File(path);
        Options boundsOption = new Options();
        boundsOption.inJustDecodeBounds = true;
        BitmapFactory.decodeStream(new FileInputStream(f), null, boundsOption);
        Options o2 = new Options();
        if (isScrapBook) {
            o2.inMutable = true;
        }
        o2.inSampleSize = calculateInSampleSize(boundsOption, requiredSize, requiredSize);
        Bitmap bitmap = BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
        ExifInterface exif = null;
        try {
            exif = new ExifInterface(path);
        } catch (IOException e) {
            e.printStackTrace();
        }
        bitmap = rotateImage(bitmap, exif.getAttributeInt("Orientation", 0));
        if (bitmap.isMutable()) {
            return bitmap;
        }
        Bitmap mutableBitmap = bitmap.copy(Config.ARGB_8888, true);
        if (mutableBitmap != bitmap) {
            bitmap.recycle();
        }
        return mutableBitmap;
    } catch (FileNotFoundException e2) {
        return null;
    }
}

App Crash On This Line

bitmap = rotateImage(bitmap, exif.getAttributeInt("Orientation", 0));
        if (bitmap.isMutable()) {
            return bitmap;