How would I call a method from a different activity? In my main activity, I have a button that shows a dialog to set the difficulty level of the game. Then you click start game which starts a new activity containing a view with all the game information. I need to send the difficulty level chosen to the other activity but cannot seem to figure out how to.
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2 Answers
You could put it in the extras with the intent:
Intent StartGame = new Intent(this, StartGame.class); StartGame.putExtra("difficulty", difficultyLevel); startActivity(StartGame); Then in your StartGame.class you can retrive it like this(assuming its a string):
Bundle extras = getIntent().getExtras(); if (extras != null) { String difficulty= extras.getString("difficulty"); } 
1 Comment
Vincent
I'm doing it the same way atm but isn't there an other way? So you can directly call a method from the activity where you start the intent from instead of first checking for GetExtras() in the destination activity and then calling a method.
Well I don't know how sound my solution is but I created a myApplication class which sub classes the Application class .
This holds the reference to the activity I wanted to call
import android.app.Application; public class myApplication extends Application { public PostAndViewActivity pv; } When the PostAndViewActivity calls the oncreate is sets the pv to point to itself.
public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); ((myApplication) getApplication()).pv = this; Then when I want to call the method I want I just use code like this:
((myApplication) getApplication()).pv.refreshYourself(); Perhaps a bit hacky but it works..... I welcome some critisism for this ;-)
