String filePath = getPath(imageUri);

public String getPath(Uri uri) {
        String[] projection = {MediaStore.MediaColumns.DATA};
        Cursor cursor = managedQuery(uri, projection, null, null, null);
        int column_index = cursor
                .getColumnIndexOrThrow(MediaStore.MediaColumns.DATA);
        cursor.moveToFirst();
        String imagePath = cursor.getString(column_index);

        return cursor.getString(column_index);
    }