Picker click event is not working on android

Hello everyone,

I have a picker and a label, what should happen is, if the label is clicked, the picker should be opened. So, on the label event listener I fire a click on the picker but it doesn't open. It's a must on android picker to click on the picker itself to see the pickerRows, my question is how to show the pickerRows without clicking on the picker ?

Thanks in advance !