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ViewPagerAdapter.java

+package com.example.peopluz1;
+
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
+import androidx.viewpager2.adapter.FragmentStateAdapter;
+
+import com.example.peopluz1.fragments.Checker;
+import com.example.peopluz1.fragments.Notification;
+import com.example.peopluz1.fragments.Update;
+
+public class ViewPagerAdapter extends FragmentStateAdapter {
+    public ViewPagerAdapter(@NonNull FragmentActivity fragmentActivity) {
+        super(fragmentActivity);
+    }
+
+    @NonNull
+    @Override
+    public Fragment createFragment(int position) {
+        switch (position){
+            case 0:
+                return new Update();
+            case 1:
+                return new Notification();
+            case 2:
+                return new Checker();
+            default:
+                return new Update();
+        }
+    }
+
+    @Override
+    public int getItemCount() {
+        return 3;
+    }
+}