feat: migrate lib to ViewPager2 (#139)

Co-authored-by: Piotr Trocki <[email protected]>

Author: troZee

README.md

@@ -11,10 +11,10 @@ This component allows the user to swipe left and right through pages of data. Un
 
 ## Versions
 
-| 1.x              | 2.x              | 3.x
-| ---------------- | -------------    | -------------    |
-|                  | iOS support      | iOS support      |
-| Android support  | Android support  | AndroidX support  |
+| 1.x              | 2.x              | 3.x              | 4.x                |
+| ---------------- | -------------    | -------------    | -------------      |
+|                  | iOS support      | iOS support      | iOS support        |
+| Android support  | Android support  | AndroidX support | ViewPager2 support |
 
 ## Getting started
 

android/build.gradle

@@ -38,4 +38,6 @@ repositories {
 dependencies {
     //noinspection GradleDynamicVersion
     api 'com.facebook.react:react-native:+'
+    implementation 'com.github.troZee:ViewPager2:v1.0.6'
+
 }

android/src/main/java/com/reactnativecommunity/viewpager/FragmentAdapter.java

@@ -0,0 +1,58 @@
+package com.reactnativecommunity.viewpager;
+
+import android.view.View;
+
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
+
+
+import com.reactnative.community.viewpager2.adapter.FragmentStateAdapter;
+
+import java.util.ArrayList;
+
+public class FragmentAdapter extends FragmentStateAdapter {
+
+    public FragmentAdapter(@NonNull FragmentActivity fragmentActivity) {
+        super(fragmentActivity);
+    }
+
+    private ArrayList<ViewPagerFragment> children = new ArrayList<>();
+
+    @NonNull
+    @Override
+    public Fragment createFragment(int position) {
+        return children.get(position);
+    }
+
+    @Override
+    public int getItemCount() {
+        return children.size();
+    }
+
+    public void addFragment(View child, int index) {
+        children.add(ViewPagerFragment.newInstance(child.getId()));
+        notifyDataSetChanged();
+    }
+
+
+    public void removeFragment(View child) {
+        for (int i = 0; i < children.size(); i++) {
+            Fragment fragment = children.get(i);
+            if (fragment.getId() == child.getId()) {
+                children.remove(i);
+                notifyItemRemoved(i);
+                return;
+            }
+        }
+    }
+
+    public void removeFragmentAt(int index) {
+        children.remove(index);
+        notifyItemRemoved(index);
+    }
+
+    public View getChildAt(int index) {
+        return children.get(index).getView();
+    }
+}