How to call a method from a different activity in Android

Question

I have an app that creates a display of buttons dynamically using this method

public void ButtonLayout() { //Creates new layout and params to go with final LinearLayout llb = (LinearLayout)findViewById(R.id.buttonlayout); //Creates new buttons and indexes for(int i = 0; i < count; i++) { Button displayButton = buttonlist.get(i); //Adds button to view with index and parameters if(displayButton.getTag() == tag || tag == null){ llb.addView(displayButton, i, lp); } } }

it then opens up a new activity which is a menu, The menu has buttons on it, I want to be able to recall the above method (reload all the buttons) from my menu activity, I cant just start the first activity again.

Is there a way of doing this?

It's a rude solution, but it's a solution: you can make your activity as a public singleton, so you could get the activity anywhere to do whatever you want. — Drewen
– Drewen, Commented Apr 2, 2013 at 10:48

MemLeak · Accepted Answer · 2013-04-02 10:50:09Z

I would write class or method where you inject the dependency to a activity and handle your work there

for example:

public class Util{ pulic static void doSomething(LinearLayout llb, List<Buttons> buttonlist){ llb.clear(); // pseudocode for(int i = 0; i < count; i++) { Button displayButton = buttonlist.get(i); //Adds button to view with index and parameters if(displayButton.getTag() == tag || tag == null){ llb.addView(displayButton, i, lp); } } }

Kumar Bibek · Accepted Answer · 2013-04-02 10:45:23Z

You can write a Parent activity, which would have this method. The other activities that need to use this method, can extend this parent activity, and can re-use the layout code that you have here.

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