Android布局在横向和纵向上具有不同的项目

Question

I have main.xml in res/layout-land and in res/layout. There's a grid of 12 icons, 3 by 4 (width, height, respectively). If the user rotates to landscape, I want to display them with a ViewPager of 3 by 2, and 3 by 2 in two pages. So in the res/layout there's a grid of 12 items and in the res/layout-land there's a ViewPager, to which I need to give a PagerAdapter.

My question is: under the assumption I'm working with configChanges="orientation", how do I do that? Or more specifically, Where for example do I give the ViewPager its PagerAdapter?

Answer 1

Display display = ((WindowManager) getSystemService(WINDOW_SERVICE)).getDefaultDisplay();

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    if(display.getOrientation() == 0)
        setContentView(R.layout.main_portrait);
    else
        setContentView(R.layout.main_landscape); //getOrientation gives 1 here
}

Answer 2

You could make two layout files and at the beginning of your onCreate() (just after super.onCreate(bundle) line), put an if/else statement around this line:

setContentView(R.layout.main);

to look like this:

if(orientation==LANDSCAPE)
    setContentView(R.layout.main_landscape);
else
    setContentView(R.layout.main_portrait);

and from then on, wherever your java code would be different, just wrap it in the same condition. It's a little long-winded if your java code is very dependent on being in portrait, but I can't think of a better solution atm.

Also, depending on your application and it's functionality, you may need to recreate the activity on orientation change. But again, it may not be necessary.

I hope this helps