so when I started my project first I modified the MainActivity class inside the OnCreate to initialize the functions for its activity_main.xml (imagebuttons recyclerview background change with switch etc.) that was my main activity. Then I had an idea of adding swipe feature to go from the main layout to second layout by swiping left to right. I created the second layout the same way as the Mainactivity was created. I created the class and then connected the xml with the class
(tools:context=”.FoldersActivity”) and initialized the functions.
I came across ViewPager2 in the Internet but I could not find any solutions to make what I needed. Thanks.
First add ViewPager2 in activity_main This will act as the container that allows users to swipe between the layouts
activity_main
<androidx.viewpager2.widget.ViewPager2
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="match_parent" />
Instead of creating separate activities for each layout, you’ll create two fragments. MainFragment for your main layout.FoldersFragment for the second layout.
MainFragment.kt
class MainFragment : Fragment(R.layout.fragment_main) {
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
// Initialize your functions for Main Layout here
}
}
FoldersFragment.kt
class FoldersFragment : Fragment(R.layout.fragment_folders) {
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
// Initialize your functions for Folders Layout here
}
}
Now we can set up the ViewPager2 to handle swiping between the fragments. Create an adapter that tells ViewPager2 which fragment to display.
MainActivty.kt
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
// Reference to the ViewPager2 in activity_main.xml
val viewPager: ViewPager2 = findViewById(R.id.viewPager)
// List of fragments to swipe between
val fragments = listOf(MainFragment(), FoldersFragment())
// Set up the adapter
val adapter = ViewPagerAdapter(this, fragments)
viewPager.adapter = adapter
}
}
ViewPagerAdapter.kt
class ViewPagerAdapter(
activity: AppCompatActivity,
private val fragments: List<Fragment>
) : FragmentStateAdapter(activity) {
// Returns the number of fragments
override fun getItemCount(): Int = fragments.size
// Returns the fragment to display for the current page
override fun createFragment(position: Int): Fragment {
return fragments[position]
}
}
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