Show the particular component of the screen when backed - codenameone

Question

I've a screen with a list of components. When I scroll down the screen, go to the next screen from a button (lets say 20th component) and go back to the previous screen with back btn, the previous screen (with list of components) displays with the first component there. How can I show the screen with 20th component when backed?
Look at the video here
Container mainContainer = new Container(new BoxLayout(BoxLayout.Y_AXIS));
mainContainer.setScrollableY(true);
for (Map<String, Object> entrySet : protectedPlantsList) {
String title = entrySet.get("title").toString();
String sname = entrySet.get("sname").toString();
String nname = entrySet.get("nname").toString();
Label plantSpeciesLabel = new Label(title);
TextArea family = new TextArea(sname);
TextArea nepaliName = new TextArea(nname);
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Button infoIcon1 = new Button("", "TextField");
infoIcon1.addActionListener(e -> {
new ThreatCategory(res, threatData1.getName(), infoIcon1.getName(), threatList).show();
});
mainContainer.add(BorderLayout.centerEastWest(plantSpeciesLabel, ...., .....));
}
Update 1:
ProtectedPlantAndSpecies class:
Container mainContainer = new Container(new BoxLayout(BoxLayout.Y_AXIS));
mainContainer.setScrollableY(true);
for (Map<String, Object> entrySet : protectedPlantsList) {
String title = entrySet.get("title").toString();
String sname = entrySet.get("sname").toString();
String nname = entrySet.get("nname").toString();
Label plantSpeciesLabel = new Label(title);
TextArea family = new TextArea(sname);
TextArea nepaliName = new TextArea(nname);
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Button infoIcon1 = new Button("", "TextField");
infoIcon1.addActionListener(e -> {
Form myDestinationForm = new ThreatCategory(res, cat, cat_description, threatList);
myDestinationForm.addShowListener(f -> infoIcon1.requestFocus());
myDestinationForm.show();
});
mainContainer.add(BorderLayout.centerEastWest(plantSpeciesLabel, ...., .....));
}
ThreatCategory class:
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Command backCommand = new Command("Back", backFontImage) {
#Override
public void actionPerformed(ActionEvent evt) {
new ProtectedPlantAndSpecies(res, true).show();
}
};
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Answer 1

Do something like this:
Form hi = new Form("Last", BoxLayout.y());
Button t = new Button("Next");
hi.add(t);
t.addActionListener(e -> {
Form f = new Form("Showing Last", BoxLayout.y());
for(int iter = 0 ; iter < 20 ; iter++) {
f.add(new Button("Button " + iter));
}
Button last = new Button("Last");
f.add(last);
f.addShowListener(ee -> last.requestFocus());
f.show();
});