Slow loading of layout

Question

I have a super class which is in a library. This library take care of initializing some basic layout components and other stuff. My problem is that it takes 1.x seconds to load the layout, and shows the default layout for a while, before setting the child-specified layout.

This is the method of my super class:

public void InitializeWindow(Activity act, int layoutResourceId, String windowTitle,
        Object menuAdapter, int slideMenuMode) {
    super.setContentView(layoutResourceId);
    super.setBehindContentView(R.layout.menu_frame);
    this.menuAdapter = menuAdapter; 
    this.slideMenuMode = slideMenuMode;
    setWindowTitle(windowTitle);
    initializeSlidingMenu();
}

This is called this way:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    super.InitializeWindow(this, R.layout.activity_home, "\t\tHome",
            new MenuAdapter(this, R.menu.slide_menu), SlidingMenu.TOUCHMODE_FULLSCREEN);    
}

The application works like a charm, but it takes, as I said around 1.x seconds to load the layout passed from the child-class. Why does this happen?

By request, this is my initializeSlideMenu() method:

public void initializeSlidingMenu() {
    this.setSlidingActionBarEnabled(true);
    getSlidingMenu().setBehindOffsetRes(R.dimen.actionbar_home_width);
    getSlidingMenu().setShadowWidthRes(R.dimen.shadow_width);
    getSlidingMenu().setShadowDrawable(R.drawable.shadow);
    getSlidingMenu().setTouchModeAbove(slideMenuMode);
    getSlidingMenu().setBehindScrollScale(0.25f);

    ListView v = new ListView(this);
    v.setBackgroundColor(Color.parseColor("#000000"));
    v.setAdapter((ListAdapter) menuAdapter);
    getSlidingMenu().setMenu(v);
}

Answer 1

To avoid such problems there are three ways in general.

1. Let your onCreate() finish after setContentView() call as early as possible. You can use postDelayed runnable to delay few initialization which may not be needed at early stages.

2. Do some task when the view is ready, it causes the Runnable to be added to the message queue of that view.

Snippet

view.post(new Runnable() {

        @Override
        public void run() {

        }
    });

If none of the above helps consider "Optimize with stubs" link : http://android-developers.blogspot.in/2009/03/android-layout-tricks-3-optimize-with.html

Hope it helps.