getPageTitle: At a given position, you need to supply the PagerAdapter with a title.

As noted earlier, the second parameter is of type Object and is the same as the return value from the instantiateItem method.

isViewFromObject: This method checks whether a particular object belongs to a given position, which is made simple in this example-just check whether the View equals the object (i.e., points to the same reference).

For this example, the count is the number of enum values in the model object.

getCount: You simply return the number of views that will be maintained by the ViewPager.

destroyItem: This method removes a particular view from the collection of Views maintained by the PagerAdapter.

Both refer to a particular item in the PagerAdapter.

The object being returned by this method is also used later on, as the second parameter in the isViewFromObject method. Next, you add the newly inflated layout to the collection of Views maintained by the PagerAdapter, and then you return that layout. In this case, you use the enum and inflate the particular enum value’s associated layout. instantiateItem: Using the LayoutInflater, you can inflate any desired XML layout.You just save the Context as a member variable of the class. CustomPagerAdapter(Context context): The constructor needs a Context reference, since you’ll want to access some string and layout resources later on.Step by step, here’s each piece of the puzzle:

There’s a lot going on here, but don’t fret. Public class MainActivity extends AppCompatActivity

Endnote 2007