# FragmentPagerAdapter

Artifact: [androidx.fragment:fragment](https://developer.android.com/jetpack/androidx/releases/fragment) [View Source](https://cs.android.com/search?q=file:androidx/fragment/app/FragmentPagerAdapter.java+class:androidx.fragment.app.FragmentPagerAdapter) Added in [1.1.0](https://developer.android.com/jetpack/androidx/releases/fragment#1.1.0) Deprecated in [1.3.0](https://developer.android.com/jetpack/androidx/releases/fragment#1.3.0)

*** ** * ** ***


```
public abstract class FragmentPagerAdapter extends PagerAdapter
```

<br />

|---|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object.html) |||
| ↳ | [androidx.viewpager.widget.PagerAdapter](https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter) ||
|   | ↳ | [androidx.fragment.app.FragmentPagerAdapter](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter) |

*** ** * ** ***

> [!CAUTION]
> **This class is deprecated.**   
>
> Switch to `https://developer.android.com/reference/androidx/viewpager2/widget/ViewPager2` and use `https://developer.android.com/reference/androidx/viewpager2/adapter/FragmentStateAdapter` instead.

Implementation of `https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter` that represents each page as a `https://developer.android.com/reference/androidx/fragment/app/Fragment` that is persistently kept in the fragment manager as long as the user can return to the page.

This version of the pager is best for use when there are a handful of typically more static fragments to be paged through, such as a set of tabs. The fragment of each page the user visits will be kept in memory, though its view hierarchy may be destroyed when not visible. This can result in using a significant amount of memory since fragment instances can hold on to an arbitrary amount of state. For larger sets of pages, consider `https://developer.android.com/reference/androidx/fragment/app/FragmentStatePagerAdapter`.

When using FragmentPagerAdapter the host ViewPager must have a valid ID set.

Subclasses only need to implement `https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#getItem(int)` and `https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#getCount()` to have a working adapter.
Here is an example implementation of a pager containing fragments of lists:

```java
public class FragmentPagerSupport extends FragmentActivity {
    static final int NUM_ITEMS = 10;

    MyAdapter mAdapter;

    ViewPager mPager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.fragment_pager);

        mAdapter = new MyAdapter(getSupportFragmentManager());

        mPager = (ViewPager)findViewById(R.id.pager);
        mPager.setAdapter(mAdapter);

        // Watch for button clicks.
        Button button = (Button)findViewById(R.id.goto_first);
        button.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                mPager.setCurrentItem(0);
            }
        });
        button = (Button)findViewById(R.id.goto_last);
        button.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                mPager.setCurrentItem(NUM_ITEMS-1);
            }
        });
    }

    public static class MyAdapter extends FragmentPagerAdapter {
        public MyAdapter(FragmentManager fm) {
            super(fm, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
        }

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

        @Override
        public Fragment getItem(int position) {
            return ArrayListFragment.newInstance(position);
        }
    }

    public static class ArrayListFragment extends ListFragment {
        int mNum;

        /**
         * Create a new instance of CountingFragment, providing "num"
         * as an argument.
         */
        static ArrayListFragment newInstance(int num) {
            ArrayListFragment f = new ArrayListFragment();

            // Supply num input as an argument.
            Bundle args = new Bundle();
            args.putInt("num", num);
            f.setArguments(args);

            return f;
        }

        /**
         * When creating, retrieve this instance's number from its arguments.
         */
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            mNum = getArguments() != null ? getArguments().getInt("num") : 1;
        }

        /**
         * The Fragment's UI is just a simple text view showing its
         * instance number.
         */
        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View v = inflater.inflate(R.layout.fragment_pager_list, container, false);
            View tv = v.findViewById(R.id.text);
            ((TextView)tv).setText("Fragment #" + mNum);
            return v;
        }

        @Override
        public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
            super.onViewCreated(view, savedInstanceState);
            setListAdapter(new ArrayAdapter<String>(getActivity(),
                    android.R.layout.simple_list_item_1, Cheeses.sCheeseStrings));
        }

        @Override
        public void onListItemClick(ListView l, View v, int position, long id) {
            Log.i("FragmentList", "Item clicked: " + id);
        }
    }
}
```
The `R.layout.fragment_pager`resource of the top-level fragment is:

```xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="vertical" android:padding="4dip"
        android:gravity="center_horizontal"
        android:layout_width="match_parent" android:layout_height="match_parent">

    <androidx.viewpager.widget.ViewPager
            android:id="@+id/pager"
            android:layout_width="match_parent"
            android:layout_height="0px"
            android:layout_weight="1">
    </androidx.viewpager.widget.ViewPager>

    <LinearLayout android:orientation="horizontal"
            android:gravity="center" android:measureWithLargestChild="true"
            android:layout_width="match_parent" android:layout_height="wrap_content"
            android:layout_weight="0">
        <Button android:id="@+id/goto_first"
            android:layout_width="wrap_content" android:layout_height="wrap_content"
            android:text="@string/first">
        </Button>
        <Button android:id="@+id/goto_last"
            android:layout_width="wrap_content" android:layout_height="wrap_content"
            android:text="@string/last">
        </Button>
    </LinearLayout>
</LinearLayout>
```
The `R.layout.fragment_pager_list`resource containing each individual fragment's layout is:

```xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:drawable/gallery_thumb">

    <TextView android:id="@+id/text"
        android:layout_width="match_parent" android:layout_height="wrap_content"
        android:gravity="center_vertical|center_horizontal"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="@string/hello_world"/>

    <!-- The frame layout is here since we will be showing either
    the empty view or the list view.  -->
    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="0dip"
        android:layout_weight="1" >
        <!-- Here is the list. Since we are using a ListActivity, we
             have to call it "@android:id/list" so ListActivity will
             find it -->
        <ListView android:id="@android:id/list"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:drawSelectorOnTop="false"/>

        <!-- Here is the view to show if the list is empty -->
        <TextView android:id="@android:id/empty"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:text="No items."/>

    </FrameLayout>

</LinearLayout>
```

## Summary

| ### Constants |
|---|---|
| `static final int` | `https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT() = 1` **This field is deprecated.** Deprecated in Java |
| `static final int` | `https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#BEHAVIOR_SET_USER_VISIBLE_HINT() = 0` **This field is deprecated.** This behavior relies on the deprecated `https://developer.android.com/reference/androidx/fragment/app/Fragment#setUserVisibleHint(boolean)` API. <br /> |

| ### Public constructors |
|---|
| `[FragmentPagerAdapter](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#FragmentPagerAdapter(androidx.fragment.app.FragmentManager))(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/fragment/app/FragmentManager fm)` **This method is deprecated.** use `https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#FragmentPagerAdapter(androidx.fragment.app.FragmentManager,int)` with `https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT()` <br /> |
| `[FragmentPagerAdapter](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#FragmentPagerAdapter(androidx.fragment.app.FragmentManager,int))(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/fragment/app/FragmentManager fm, int behavior)` **This method is deprecated.** Deprecated in Java |

| ### Public methods |
|---|---|
| `void` | `[destroyItem](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#destroyItem(android.view.ViewGroup,int,java.lang.Object))( @https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/view/ViewGroup.html container, int position, @https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/java/lang/Object.html object )` **This method is deprecated.** Deprecated in Java |
| `void` | `[finishUpdate](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#finishUpdate(android.view.ViewGroup))(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/view/ViewGroup.html container)` **This method is deprecated.** Deprecated in Java |
| `abstract @https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/fragment/app/Fragment` | `[getItem](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#getItem(int))(int position)` **This method is deprecated.** Deprecated in Java |
| `long` | `[getItemId](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#getItemId(int))(int position)` **This method is deprecated.** Deprecated in Java |
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/java/lang/Object.html` | `[instantiateItem](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#instantiateItem(android.view.ViewGroup,int))(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/view/ViewGroup.html container, int position)` **This method is deprecated.** Deprecated in Java |
| `boolean` | `[isViewFromObject](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#isViewFromObject(android.view.View,java.lang.Object))(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/view/View.html view, @https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/java/lang/Object.html object)` **This method is deprecated.** Deprecated in Java |
| `void` | `[restoreState](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#restoreState(android.os.Parcelable,java.lang.ClassLoader))(@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/android/os/Parcelable.html state, @https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/java/lang/ClassLoader.html loader)` **This method is deprecated.** Deprecated in Java |
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/android/os/Parcelable.html` | `[saveState](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#saveState())()` **This method is deprecated.** Deprecated in Java |
| `void` | `[setPrimaryItem](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#setPrimaryItem(android.view.ViewGroup,int,java.lang.Object))( @https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/view/ViewGroup.html container, int position, @https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/java/lang/Object.html object )` **This method is deprecated.** Deprecated in Java |
| `void` | `[startUpdate](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#startUpdate(android.view.ViewGroup))(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/view/ViewGroup.html container)` **This method is deprecated.** Deprecated in Java |

### Inherited Constants

From [androidx.viewpager.widget.PagerAdapter](https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter) `static final int` `https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#POSITION_NONE() = -2`

**This field is deprecated.** Deprecated in Java
`static final int` `https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#POSITION_UNCHANGED() = -1`

**This field is deprecated.** Deprecated in Java

### Inherited methods

From [androidx.viewpager.widget.PagerAdapter](https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter) `void` `[destroyItem](https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#destroyItem(android.view.View,int,java.lang.Object))(@https://developer.android.com/reference/androidx/annotation/NonNull https://developer.android.com/reference/android/view/View.html container, int position, @https://developer.android.com/reference/androidx/annotation/NonNull https://developer.android.com/reference/java/lang/Object.html object)`

**This method is deprecated.**

Use `https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#destroyItem(android.view.ViewGroup,int,java.lang.Object)`

<br />

`void` `[finishUpdate](https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#finishUpdate(android.view.View))(@https://developer.android.com/reference/androidx/annotation/NonNull https://developer.android.com/reference/android/view/View.html container)`

**This method is deprecated.**

Use `https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#finishUpdate(android.view.ViewGroup)`

<br />

`abstract int` `[getCount](https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#getCount())()`

**This method is deprecated.** Deprecated in Java
`int` `[getItemPosition](https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#getItemPosition(java.lang.Object))(@https://developer.android.com/reference/androidx/annotation/NonNull https://developer.android.com/reference/java/lang/Object.html object)`

**This method is deprecated.** Deprecated in Java
`@https://developer.android.com/reference/androidx/annotation/Nullable https://developer.android.com/reference/java/lang/CharSequence.html` `[getPageTitle](https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#getPageTitle(int))(int position)`

**This method is deprecated.** Deprecated in Java
`float` `[getPageWidth](https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#getPageWidth(int))(int position)`

**This method is deprecated.** Deprecated in Java
`@https://developer.android.com/reference/androidx/annotation/NonNull https://developer.android.com/reference/java/lang/Object.html` `[instantiateItem](https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#instantiateItem(android.view.View,int))(@https://developer.android.com/reference/androidx/annotation/NonNull https://developer.android.com/reference/android/view/View.html container, int position)`

**This method is deprecated.**

Use `https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#instantiateItem(android.view.ViewGroup,int)`

<br />

`void` `[notifyDataSetChanged](https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#notifyDataSetChanged())()`

**This method is deprecated.** Deprecated in Java
`void` `[registerDataSetObserver](https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#registerDataSetObserver(android.database.DataSetObserver))(@https://developer.android.com/reference/androidx/annotation/NonNull https://developer.android.com/reference/android/database/DataSetObserver.html observer)`

**This method is deprecated.** Deprecated in Java
`void` `[setPrimaryItem](https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#setPrimaryItem(android.view.View,int,java.lang.Object))(
@https://developer.android.com/reference/androidx/annotation/NonNull https://developer.android.com/reference/android/view/View.html container,
int position,
@https://developer.android.com/reference/androidx/annotation/NonNull https://developer.android.com/reference/java/lang/Object.html object
)`

**This method is deprecated.**

Use `https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#setPrimaryItem(android.view.ViewGroup,int,java.lang.Object)`

<br />

`void` `[startUpdate](https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#startUpdate(android.view.View))(@https://developer.android.com/reference/androidx/annotation/NonNull https://developer.android.com/reference/android/view/View.html container)`

**This method is deprecated.**

Use `https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#startUpdate(android.view.ViewGroup)`

<br />

`void` `[unregisterDataSetObserver](https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#unregisterDataSetObserver(android.database.DataSetObserver))(@https://developer.android.com/reference/androidx/annotation/NonNull https://developer.android.com/reference/android/database/DataSetObserver.html observer)`

**This method is deprecated.** Deprecated in Java

## Constants

### BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT

Added in [1.1.0](https://developer.android.com/jetpack/androidx/releases/fragment#1.1.0) Deprecated in [1.3.0](https://developer.android.com/jetpack/androidx/releases/fragment#1.3.0)

```
public static final int BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT = 1
```

> [!CAUTION]
> **This field is deprecated.**   
> Deprecated in Java

Indicates that only the current fragment will be in the `https://developer.android.com/reference/androidx/lifecycle/Lifecycle.State#RESUMED` state. All other Fragments are capped at `https://developer.android.com/reference/androidx/lifecycle/Lifecycle.State#STARTED`.

| See also |
|---|---|
| `https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#FragmentPagerAdapter(androidx.fragment.app.FragmentManager,int)` |   |

### BEHAVIOR_SET_USER_VISIBLE_HINT

Added in [1.1.0](https://developer.android.com/jetpack/androidx/releases/fragment#1.1.0) Deprecated in [1.1.0](https://developer.android.com/jetpack/androidx/releases/fragment#1.1.0)

```
public static final int BEHAVIOR_SET_USER_VISIBLE_HINT = 0
```

> [!CAUTION]
> **This field is deprecated.**   
>
> This behavior relies on the deprecated `https://developer.android.com/reference/androidx/fragment/app/Fragment#setUserVisibleHint(boolean)` API. Use `https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT()` to switch to its replacement, `https://developer.android.com/reference/androidx/fragment/app/FragmentTransaction#setMaxLifecycle(androidx.fragment.app.Fragment,androidx.lifecycle.Lifecycle.State)`.

Indicates that `https://developer.android.com/reference/androidx/fragment/app/Fragment#setUserVisibleHint(boolean)` will be called when the current fragment changes.

| See also |
|---|---|
| `https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#FragmentPagerAdapter(androidx.fragment.app.FragmentManager,int)` |   |

## Public constructors

### FragmentPagerAdapter

Added in [1.1.0](https://developer.android.com/jetpack/androidx/releases/fragment#1.1.0) Deprecated in [1.1.0](https://developer.android.com/jetpack/androidx/releases/fragment#1.1.0)

```
public [FragmentPagerAdapter](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#FragmentPagerAdapter(androidx.fragment.app.FragmentManager))(@NonNull FragmentManager fm)
```

> [!CAUTION]
> **This method is deprecated.**   
>
> use `https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#FragmentPagerAdapter(androidx.fragment.app.FragmentManager,int)` with `https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT()`

Constructor for `https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter` that sets the fragment manager for the adapter. This is the equivalent of calling `https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#FragmentPagerAdapter(androidx.fragment.app.FragmentManager,int)` and passing in `https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#BEHAVIOR_SET_USER_VISIBLE_HINT()`.

Fragments will have `https://developer.android.com/reference/androidx/fragment/app/Fragment#setUserVisibleHint(boolean)` called whenever the current Fragment changes.

| Parameters |
|---|---|
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/fragment/app/FragmentManager fm` | fragment manager that will interact with this adapter |

### FragmentPagerAdapter

Added in [1.1.0](https://developer.android.com/jetpack/androidx/releases/fragment#1.1.0) Deprecated in [1.3.0](https://developer.android.com/jetpack/androidx/releases/fragment#1.3.0)

```
public [FragmentPagerAdapter](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#FragmentPagerAdapter(androidx.fragment.app.FragmentManager,int))(@NonNull FragmentManager fm, int behavior)
```

> [!CAUTION]
> **This method is deprecated.**   
> Deprecated in Java

Constructor for `https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter`. If `https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT()` is passed in, then only the current Fragment is in the `https://developer.android.com/reference/androidx/lifecycle/Lifecycle.State#RESUMED` state. All other fragments are capped at `https://developer.android.com/reference/androidx/lifecycle/Lifecycle.State#STARTED`. If `https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#BEHAVIOR_SET_USER_VISIBLE_HINT()` is passed, all fragments are in the `https://developer.android.com/reference/androidx/lifecycle/Lifecycle.State#RESUMED` state and there will be callbacks to `https://developer.android.com/reference/androidx/fragment/app/Fragment#setUserVisibleHint(boolean)`.

| Parameters |
|---|---|
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/fragment/app/FragmentManager fm` | fragment manager that will interact with this adapter |
| `int behavior` | determines if only current fragments are in a resumed state |

## Public methods

### destroyItem

```
public void [destroyItem](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#destroyItem(android.view.ViewGroup,int,java.lang.Object))(
    @NonNull ViewGroup container,
    int position,
    @NonNull Object object
)
```

> [!CAUTION]
> **This method is deprecated.**   
> Deprecated in Java

Remove a page for the given position. The adapter is responsible for removing the view from its container, although it only must ensure this is done by the time it returns from `https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#finishUpdate(android.view.ViewGroup)`.

| Parameters |
|---|---|
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/view/ViewGroup.html container` | The containing View from which the page will be removed. |
| `int position` | The page position to be removed. |
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/java/lang/Object.html object` | The same object that was returned by `https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#instantiateItem(android.view.View,int)`. |

### finishUpdate

```
public void [finishUpdate](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#finishUpdate(android.view.ViewGroup))(@NonNull ViewGroup container)
```

> [!CAUTION]
> **This method is deprecated.**   
> Deprecated in Java

Called when the a change in the shown pages has been completed. At this point you must ensure that all of the pages have actually been added or removed from the container as appropriate.

| Parameters |
|---|---|
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/view/ViewGroup.html container` | The containing View which is displaying this adapter's page views. |

### getItem

Added in [1.1.0](https://developer.android.com/jetpack/androidx/releases/fragment#1.1.0) Deprecated in [1.3.0](https://developer.android.com/jetpack/androidx/releases/fragment#1.3.0)

```
public abstract @NonNull Fragment [getItem](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#getItem(int))(int position)
```

> [!CAUTION]
> **This method is deprecated.**   
> Deprecated in Java

Return the Fragment associated with a specified position.

### getItemId

Added in [1.1.0](https://developer.android.com/jetpack/androidx/releases/fragment#1.1.0) Deprecated in [1.3.0](https://developer.android.com/jetpack/androidx/releases/fragment#1.3.0)

```
public long [getItemId](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#getItemId(int))(int position)
```

> [!CAUTION]
> **This method is deprecated.**   
> Deprecated in Java

Return a unique identifier for the item at the given position.

The default implementation returns the given position. Subclasses should override this method if the positions of items can change.

| Parameters |
|---|---|
| `int position` | Position within this adapter |

| Returns |
|---|---|
| `long` | Unique identifier for the item at position |

### instantiateItem

```
public @NonNull Object [instantiateItem](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#instantiateItem(android.view.ViewGroup,int))(@NonNull ViewGroup container, int position)
```

> [!CAUTION]
> **This method is deprecated.**   
> Deprecated in Java

Create the page for the given position. The adapter is responsible for adding the view to the container given here, although it only must ensure this is done by the time it returns from `https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#finishUpdate(android.view.ViewGroup)`.

| Parameters |
|---|---|
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/view/ViewGroup.html container` | The containing View in which the page will be shown. |
| `int position` | The page position to be instantiated. |

| Returns |
|---|---|
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/java/lang/Object.html` | Returns an Object representing the new page. This does not need to be a View, but can be some other container of the page. |

### isViewFromObject

Added in [1.1.0](https://developer.android.com/jetpack/androidx/releases/fragment#1.1.0) Deprecated in [1.3.0](https://developer.android.com/jetpack/androidx/releases/fragment#1.3.0)

```
public boolean [isViewFromObject](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#isViewFromObject(android.view.View,java.lang.Object))(@NonNull View view, @NonNull Object object)
```

> [!CAUTION]
> **This method is deprecated.**   
> Deprecated in Java

Determines whether a page View is associated with a specific key object as returned by `https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#instantiateItem(android.view.ViewGroup,int)`. This method is required for a PagerAdapter to function properly.

| Parameters |
|---|---|
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/view/View.html view` | Page View to check for association with `object` |
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/java/lang/Object.html object` | Object to check for association with `view` |

| Returns |
|---|---|
| `boolean` | true if `view` is associated with the key object `object` |

### restoreState

```
public void [restoreState](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#restoreState(android.os.Parcelable,java.lang.ClassLoader))(@Nullable Parcelable state, @Nullable ClassLoader loader)
```

> [!CAUTION]
> **This method is deprecated.**   
> Deprecated in Java

Restore any instance state associated with this adapter and its pages that was previously saved by `https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#saveState()`.

| Parameters |
|---|---|
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/android/os/Parcelable.html state` | State previously saved by a call to `https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#saveState()` |
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/java/lang/ClassLoader.html loader` | A ClassLoader that should be used to instantiate any restored objects |

### saveState

```
public @Nullable Parcelable [saveState](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#saveState())()
```

> [!CAUTION]
> **This method is deprecated.**   
> Deprecated in Java

Save any instance state associated with this adapter and its pages that should be restored if the current UI state needs to be reconstructed.

| Returns |
|---|---|
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/android/os/Parcelable.html` | Saved state for this adapter |

### setPrimaryItem

```
public void [setPrimaryItem](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#setPrimaryItem(android.view.ViewGroup,int,java.lang.Object))(
    @NonNull ViewGroup container,
    int position,
    @NonNull Object object
)
```

> [!CAUTION]
> **This method is deprecated.**   
> Deprecated in Java

Called to inform the adapter of which item is currently considered to be the "primary", that is the one show to the user as the current page. This method will not be invoked when the adapter contains no items.

| Parameters |
|---|---|
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/view/ViewGroup.html container` | The containing View from which the page will be removed. |
| `int position` | The page position that is now the primary. |
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/java/lang/Object.html object` | The same object that was returned by `https://developer.android.com/reference/androidx/viewpager/widget/PagerAdapter#instantiateItem(android.view.View,int)`. |

### startUpdate

```
public void [startUpdate](https://developer.android.com/reference/androidx/fragment/app/FragmentPagerAdapter#startUpdate(android.view.ViewGroup))(@NonNull ViewGroup container)
```

> [!CAUTION]
> **This method is deprecated.**   
> Deprecated in Java

Called when a change in the shown pages is going to start being made.

| Parameters |
|---|---|
| `@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/view/ViewGroup.html container` | The containing View which is displaying this adapter's page views. |