Trying to select any file from gallery

Hi guys,
Im trying to select any picture from gallery.

Already tried these below, where i found here at forum:

driver.findElement(MobileBy.AndroidUIAutomator("new UiSelector().descriptionContains(\"img_\")")).click();

List<MobileElement> elements = (MobileElement) driver.findElementsByClassName("//android.widget.LinearLayout");

but with no success.

You could enable assistive touch in developer settings to see where the actual tap happens.

i just tried a generic id for all files and worked, it always select the first one. Thanks