CODEWITHSUNDEEP
javaandroidopengl-esevent-handlingonclick
drum
drum

Reputation: 5651

Android Menu Listener

I am new to Java and Android development and I am trying to use event handlers for menus. I had no problems setting up the menus in xml, but now I am confused on how to use handlers.

I am using

onOptionsItemSelected(MenuItem item)

and I only know how to create new activities, eg:

startActivity(new Intent(this,About.class))

I've seen many tutorials but they all focus on buttons, which I tried and failed. Also, can I have methods in different classes to better organize my code? For example have method1.java, method2.java, method3.java,.... and instantiate these classes to call on the methods.

If it helps, what I am trying to do is use OpenGL and allow the user to be able to rotate, translate, resize, etc depending on the menu option selected.

EDIT: I am trying to use states for my program, and only be able to use the handlers defined for the given states.

Upvotes: 2

Views: 9211

Answers (1)

Squonk
Squonk

Reputation: 48871

In the menu xml file, each item has an id, example...

<item
  android:id="@+id/reset"
  android:title="@string/gla_menu_title_reset" />

In your onOptionsItemSelected(MenuItem item) handler you need to get the id of the item that is passed in and then process it. An easy way of doing this is with a switch / case...

public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case R.id.reset:
            // Do something
            return true;
        case R.id.something_else:
            ...
            return true;
     }
}

And, yes, you can create standard Java classes in Android.

Upvotes: 3

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