Элемент ViewPager не отображается

Question

У меня есть один макет, который включает в себя четыре разных вида, обернутых в вертикальный линейный макет, и вид в виде пейджера в отдельном макете, но видоискатель ничего не отображает, когда я пытаюсь накачать один макет в пейджер с помощью адаптера пейджера, но представления хорошо заполняются на recyclerView;

Вот мой файл single_layout. xml:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:paddingStart="10dp"
        android:paddingEnd="10dp">

        <EditText
            android:id="@+id/milestone_layout_edit_describe"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:alpha="0.7"
            android:backgroundTint="@android:color/transparent"
            android:fontFamily="@font/rokkitt_regular"
            android:hint="describe this milestone"
            android:inputType="text"
            android:textColor="@color/black"
            android:textSize="16sp" />

        <View
            android:layout_width="match_parent"
            android:layout_height="2dp"
            android:layout_marginTop="-7dp"
            android:background="@color/middi_blue" />

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="30dp">


            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="horizontal">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:alpha="0.7"
                    android:fontFamily="@font/rokkitt_regular"
                    android:text="start date"
                    android:textColor="@color/black"
                    android:textSize="16sp" />

                <EditText
                    android:id="@+id/milestone_layout_edit_start_date"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginStart="20dp"
                    android:alpha="0.5"
                    android:backgroundTint="@android:color/transparent"
                    android:enabled="false"
                    android:focusable="false"
                    android:fontFamily="@font/rokkitt_regular"
                    android:hint="DD-MM-YY"
                    android:inputType="date"
                    android:textColor="@color/black"
                    android:textSize="16sp" />
            </LinearLayout>
            <LinearLayout
                android:id="@+id/milestone_layout_edit_start_date_layout_linear"
                android:layout_width="match_parent"
                android:layout_height="42dp"
                android:orientation="horizontal" />
        </RelativeLayout>

        <View
            android:layout_width="match_parent"
            android:layout_height="2dp"
            android:layout_marginTop="-7dp"
            android:background="@color/middi_blue" />

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="30dp">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="horizontal">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:alpha="0.7"
                    android:fontFamily="@font/rokkitt_regular"
                    android:text="end date"
                    android:textColor="@color/black"
                    android:textSize="16sp" />

                <EditText
                    android:id="@+id/milestone_layout_edit_end_date"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginStart="25dp"
                    android:alpha="0.5"
                    android:backgroundTint="@android:color/transparent"
                    android:enabled="false"
                    android:focusable="false"
                    android:fontFamily="@font/rokkitt_regular"
                    android:hint="DD-MM-YY"
                    android:inputType="date"
                    android:textColor="@color/black"
                    android:textSize="16sp" />
            </LinearLayout>
            <LinearLayout
                android:id="@+id/milestone_layout_edit_end_date_layout_linear"
                android:layout_width="match_parent"
                android:layout_height="42dp"
                android:orientation="horizontal" />
        </RelativeLayout>

        <View
            android:layout_width="match_parent"
            android:layout_height="2dp"
            android:layout_marginTop="-7dp"
            android:background="@color/middi_blue" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="30dp"
            android:orientation="horizontal">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:alpha="0.7"
                android:fontFamily="@font/rokkitt_regular"
                android:text="NGN"
                android:textColor="@color/black"
                android:textSize="16sp" />

            <EditText
                android:id="@+id/milestone_layout_edit_ngn"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginStart="48dp"
                android:alpha="0.5"
                android:backgroundTint="@android:color/transparent"
                android:fontFamily="@font/rokkitt_regular"
                android:hint="14,999.55"
                android:inputType="number"
                android:textColor="@color/black"
                android:textSize="16sp" />
        </LinearLayout>

        <View
            android:layout_width="match_parent"
            android:layout_height="2dp"
            android:layout_marginTop="-7dp"
            android:background="@color/middi_blue" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:layout_marginTop="20dp"
            android:alpha="0.6"
            android:fontFamily="@font/rokkitt_regular"
            android:text="BALANCE REMAINING"
            android:textColor="@color/black"
            android:textSize="15sp" />

        <TextView
            android:id="@+id/milestone_layout_text_remaining_balance"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:layout_marginTop="5dp"
            android:layout_marginBottom="18dp"
            android:fontFamily="@font/rokkitt_regular"
            android:text="NGN 20,000.00"
            android:textColor="@color/black"
            android:textSize="17sp" />
    </LinearLayout>
</RelativeLayout>````

My PagerAdapter class:

```public MilesPagerAdapter(Context context, int count, MilesView milesView) {
        this.context = context;
        this.count = count;
        this.milesView = milesView;
    }

    @Override
    public int getCount() {
        return count;
    }

    @Override
    public boolean isViewFromObject(@NonNull View view, @NonNull Object object) {
        return view == object;
    }

    @NonNull
    @Override
    public Object instantiateItem(@NonNull ViewGroup container, final int position) {
        inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View view = inflater.inflate(R.layout.milestones_layout, container, false);

        editDesc = view.findViewById(R.id.milestone_layout_edit_describe);
        editStartDate = view.findViewById(R.id.milestone_layout_edit_start_date);
        editEndDate = view.findViewById(R.id.milestone_layout_edit_end_date);
        textBal = view.findViewById(R.id.milestone_layout_text_remaining_balance);
        editNgn = view.findViewById(R.id.milestone_layout_edit_ngn);
        editStartDateLinear = view.findViewById(R.id.milestone_layout_edit_start_date_layout_linear);
        editEndDateLinear = view.findViewById(R.id.milestone_layout_edit_end_date_layout_linear);

             Toast.makeText(context, "added "+position, Toast.LENGTH_SHORT).show();

        container.addView(view);
        return view;
    }

    @Override
    public void destroyItem(@NonNull ViewGroup container, int position, @NonNull Object object) {
        container.removeView((View) object);
    }


}```

My ViewPager layout : 

```
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
                                xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/receiver_buyer_deal_payment_milestone_number_of_milestones_layout"
                                android:layout_width="match_parent"
                                android:layout_height="wrap_content"
                                android:layout_marginTop="18dp"
                                android:visibility="gone">

                                <LinearLayout
                                    android:layout_width="match_parent"
                                    android:layout_height="match_parent"
                                    android:alpha="0.05"
                                    android:background="#545454" />

                                <LinearLayout
                                    android:layout_width="match_parent"
                                    android:layout_height="match_parent"
                                    android:orientation="vertical">

                                    <ImageButton
                                        android:id="@+id/receiver_buyer_deal_milestones_add_more_milestones"
                                        android:layout_width="20dp"
                                        android:layout_height="20dp"
                                        android:layout_gravity="end"
                                        android:layout_marginTop="18dp"
                                        android:layout_marginEnd="59dp"
                                        android:background="@android:color/transparent"
                                        android:src="@drawable/ic_vector_22"
                                        android:visibility="gone" />

                                    <ImageButton
                                        android:id="@+id/receiver_buyer_deal_delete_milestones_btn"
                                        android:layout_width="20dp"
                                        android:layout_height="20dp"
                                        android:layout_gravity="end"
                                        android:layout_marginTop="15dp"
                                        android:layout_marginEnd="59dp"
                                        android:background="@android:color/transparent"
                                        android:src="@drawable/delete_can_red" />

                                    <RelativeLayout
                                        android:layout_width="match_parent"
                                        android:layout_height="55dp"
                                        android:orientation="horizontal">

                                        <View
                                            android:layout_width="5dp"
                                            android:layout_height="56dp"
                                            android:layout_alignParentStart="true"
                                            android:background="#58C284" />

                                        <RelativeLayout
                                            android:layout_width="match_parent"
                                            android:layout_height="wrap_content"
                                            android:layout_centerInParent="true"
                                            android:layout_marginStart="36dp"
                                            android:layout_marginEnd="36dp">

                                            <ImageView
                                                android:id="@+id/receiver_buyer_deal_milestone_showw_left"
                                                android:layout_width="wrap_content"
                                                android:layout_height="wrap_content"
                                                android:layout_alignParentStart="true"
                                                android:rotation="180"
                                                android:src="@drawable/ic_vector_25"
                                                android:visibility="invisible" />

                                            <TextView
                                                android:id="@+id/receiver_buyer_deal_milestone_text_counter"
                                                android:layout_width="wrap_content"
                                                android:layout_height="wrap_content"
                                                android:layout_centerHorizontal="true"
                                                android:fontFamily="@font/rokkitt_regular"
                                                android:text="MILESTONE 1"
                                                android:textColor="@color/black"
                                                android:textSize="16sp" />

                                            <ImageView
                                                android:id="@+id/receiver_buyer_deal_milestone_show_right"
                                                android:layout_width="wrap_content"
                                                android:layout_height="wrap_content"
                                                android:layout_alignParentEnd="true"
                                                android:layout_marginEnd="26dp"
                                                android:src="@drawable/ic_vector_25" />
                                        </RelativeLayout>
                                    </RelativeLayout>

                                  <androidx.viewpager.widget.ViewPager
                                        android:id="@+id/receiver_buyer_deal_milestones_recycler_view_setup_view"
                                        android:layout_width="match_parent"
                                        android:layout_height="match_parent"
                                        android:layout_marginStart="18dp"
                                        android:layout_marginTop="31dp"
                                        android:layout_marginEnd="18dp"/>
                                </LinearLayout>
                            </RelativeLayout>```