# BrowseSupportFragment.MainFragmentAdapter added in[version 24.1.0](https://developer.android.com/topic/libraries/support-library/revisions) belongs to Maven artifact com.android.support:leanback-v17:28.0.0-alpha1 Summary:[Ctors](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter#pubctors)\|[Methods](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter#pubmethods)\|[Inherited Methods](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter#inhmethods)\|[\[Expand All\]](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter#) # BrowseSupportFragment.MainFragmentAdapter | This package is part of the Android[support library](https://developer.android.com/topic/libraries/support-library)which is no longer maintained. The support library has been superseded by[AndroidX](https://developer.android.com/jetpack/androidx)which is part of[Jetpack](https://developer.android.com/jetpack). We recommend using the AndroidX libraries in all new projects. You should also consider[migrating](https://developer.android.com/jetpack/androidx/migrate)existing projects to AndroidX. To find the AndroidX class that maps to this deprecated class, see the AndroidX support library[class mappings](https://developer.android.com/jetpack/androidx/migrate/class-mappings). ` public static class BrowseSupportFragment.MainFragmentAdapter ` ` extends Object `` ` |---|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | java.lang.Object || | ↳ | android.support.v17.leanback.app.BrowseSupportFragment.MainFragmentAdapter\ | |--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [![](https://developer.android.com/static/assets/images/styles/disclosure_down.png)](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter#)Known Direct Subclasses [RowsSupportFragment.MainFragmentAdapter](https://developer.android.com/reference/android/support/v17/leanback/app/RowsSupportFragment.MainFragmentAdapter) |-------------------------------------------------------------------------------------------------------------------------------------------------------------|---| | [RowsSupportFragment.MainFragmentAdapter](https://developer.android.com/reference/android/support/v17/leanback/app/RowsSupportFragment.MainFragmentAdapter) | | |
*** ** * ** *** Interface that defines the interaction between[BrowseSupportFragment](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment)and its main content fragment. The key method is[getFragment()](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter#getFragment()), it will be used to get the fragment to be shown in the content section. Clients can provide any implementation of fragment and customize its interaction with[BrowseSupportFragment](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment)by overriding the necessary methods. Clients are expected to provide an instance of[BrowseSupportFragment.MainFragmentAdapterRegistry](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapterRegistry)which will be responsible for providing implementations of[BrowseSupportFragment.MainFragmentAdapter](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter)for given content types. Currently we support different types of content -[ListRow](https://developer.android.com/reference/android/support/v17/leanback/widget/ListRow),[PageRow](https://developer.android.com/reference/android/support/v17/leanback/widget/PageRow)or any subtype of[Row](https://developer.android.com/reference/android/support/v17/leanback/widget/Row). We provide an out of the box adapter implementation for any rows other than[PageRow](https://developer.android.com/reference/android/support/v17/leanback/widget/PageRow)-[RowsSupportFragment.MainFragmentAdapter](https://developer.android.com/reference/android/support/v17/leanback/app/RowsSupportFragment.MainFragmentAdapter). [PageRow](https://developer.android.com/reference/android/support/v17/leanback/widget/PageRow)is intended to give full flexibility to developers in terms of Fragment design. Users will have to provide an implementation of[BrowseSupportFragment.MainFragmentAdapter](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter)and provide that through[BrowseSupportFragment.MainFragmentAdapterRegistry](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapterRegistry).[BrowseSupportFragment.MainFragmentAdapter](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter)implementation can supply any fragment and override just those interactions that makes sense. ## Summary | ### Public constructors || |--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---| | ` `[BrowseSupportFragment.MainFragmentAdapter](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter#BrowseSupportFragment.MainFragmentAdapter(T))`(T fragment) ` | | ### Public methods || |------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` final T` | ` `[getFragment](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter#getFragment())`() ` | | ` final `[BrowseSupportFragment.FragmentHost](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.FragmentHost) | ` `[getFragmentHost](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter#getFragmentHost())`() ` Returns the current host interface so that main fragment can interact with[BrowseSupportFragment](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment). | | ` boolean` | ` `[isScalingEnabled](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter#isScalingEnabled())`() ` Returns whether row scaling is enabled. | | ` boolean` | ` `[isScrolling](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter#isScrolling())`() ` Returns whether its scrolling. | | ` void` | ` `[onTransitionEnd](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter#onTransitionEnd())`() ` Callback indicating transition end. | | ` boolean` | ` `[onTransitionPrepare](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter#onTransitionPrepare())`() ` Callback indicating transition prepare start. | | ` void` | ` `[onTransitionStart](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter#onTransitionStart())`() ` Callback indicating transition start. | | ` void` | ` `[setAlignment](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter#setAlignment(int))`(int windowAlignOffsetFromTop) ` Sets the window alignment and also the pivots for scale operation. | | ` void` | ` `[setEntranceTransitionState](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter#setEntranceTransitionState(boolean))`(boolean state) ` For rows that willing to participate entrance transition, this function hide views if afterTransition is true, show views if afterTransition is false. | | ` void` | ` `[setExpand](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter#setExpand(boolean))`(boolean expand) ` Set the visibility of titles/hover card of browse rows. | | ` void` | ` `[setScalingEnabled](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter#setScalingEnabled(boolean))`(boolean scalingEnabled) ` Sets the row scaling property. | | ### Inherited methods | |-----------------------|---| | [![](https://developer.android.com/static/assets/images/styles/disclosure_down.png)](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter#)From class` java.lang.Object ` |-------------------|-------------------------------| | ` Object` | ` clone() ` | | ` boolean` | ` equals(Object arg0) ` | | ` void` | ` finalize() ` | | ` final Class` | ` getClass() ` | | ` int` | ` hashCode() ` | | ` final void` | ` notify() ` | | ` final void` | ` notifyAll() ` | | ` String` | ` toString() ` | | ` final void` | ` wait(long arg0, int arg1) ` | | ` final void` | ` wait(long arg0) ` | | ` final void` | ` wait() ` | || ## Public constructors ### BrowseSupportFragment.MainFragmentAdapter added in[version 24.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` BrowseSupportFragment.MainFragmentAdapter (T fragment) ```

| Parameters || |------------|------------| | `fragment` | `T`
| ## Public methods ### getFragment added in[version 24.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` T getFragment () ```

| Returns || |-----|--------| | `T` |
| ### getFragmentHost added in[version 24.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` BrowseSupportFragment.FragmentHost getFragmentHost () ``` Returns the current host interface so that main fragment can interact with[BrowseSupportFragment](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment).
| Returns || |---------------------------------------------------------------------------------------------------------------------------------------------------|--------| | [BrowseSupportFragment.FragmentHost](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.FragmentHost) |
| ### isScalingEnabled added in[version 24.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` boolean isScalingEnabled () ``` Returns whether row scaling is enabled.
| Returns || |-----------|--------| | `boolean` |
| ### isScrolling added in[version 24.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` boolean isScrolling () ``` Returns whether its scrolling.
| Returns || |-----------|--------| | `boolean` |
| ### onTransitionEnd added in[version 24.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` void onTransitionEnd () ``` Callback indicating transition end.
### onTransitionPrepare added in[version 24.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` boolean onTransitionPrepare () ``` Callback indicating transition prepare start.
| Returns || |-----------|--------| | `boolean` |
| ### onTransitionStart added in[version 24.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` void onTransitionStart () ``` Callback indicating transition start.
### setAlignment added in[version 24.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` void setAlignment (int windowAlignOffsetFromTop) ``` Sets the window alignment and also the pivots for scale operation.
| Parameters || |----------------------------|--------------| | `windowAlignOffsetFromTop` | `int`
| ### setEntranceTransitionState added in[version 24.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` void setEntranceTransitionState (boolean state) ``` For rows that willing to participate entrance transition, this function hide views if afterTransition is true, show views if afterTransition is false.
| Parameters || |---------|------------------| | `state` | `boolean`
| ### setExpand added in[version 24.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` void setExpand (boolean expand) ``` Set the visibility of titles/hover card of browse rows.
| Parameters || |----------|------------------| | `expand` | `boolean`
| ### setScalingEnabled added in[version 24.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` void setScalingEnabled (boolean scalingEnabled) ``` Sets the row scaling property.
| Parameters || |------------------|------------------| | `scalingEnabled` | `boolean`
| - ## Interfaces - [BrowseFragment.FragmentHost](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseFragment.FragmentHost) - [BrowseFragment.MainFragmentAdapterProvider](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseFragment.MainFragmentAdapterProvider) - [BrowseFragment.MainFragmentRowsAdapterProvider](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseFragment.MainFragmentRowsAdapterProvider) - [BrowseSupportFragment.FragmentHost](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.FragmentHost) - [BrowseSupportFragment.MainFragmentAdapterProvider](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapterProvider) - [BrowseSupportFragment.MainFragmentRowsAdapterProvider](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentRowsAdapterProvider) - [HeadersFragment.OnHeaderClickedListener](https://developer.android.com/reference/android/support/v17/leanback/app/HeadersFragment.OnHeaderClickedListener) - [HeadersFragment.OnHeaderViewSelectedListener](https://developer.android.com/reference/android/support/v17/leanback/app/HeadersFragment.OnHeaderViewSelectedListener) - [HeadersSupportFragment.OnHeaderClickedListener](https://developer.android.com/reference/android/support/v17/leanback/app/HeadersSupportFragment.OnHeaderClickedListener) - [HeadersSupportFragment.OnHeaderViewSelectedListener](https://developer.android.com/reference/android/support/v17/leanback/app/HeadersSupportFragment.OnHeaderViewSelectedListener) - [SearchFragment.SearchResultProvider](https://developer.android.com/reference/android/support/v17/leanback/app/SearchFragment.SearchResultProvider) - [SearchSupportFragment.SearchResultProvider](https://developer.android.com/reference/android/support/v17/leanback/app/SearchSupportFragment.SearchResultProvider) - ## Classes - [BackgroundManager](https://developer.android.com/reference/android/support/v17/leanback/app/BackgroundManager) - [BaseFragment](https://developer.android.com/reference/android/support/v17/leanback/app/BaseFragment) - [BaseSupportFragment](https://developer.android.com/reference/android/support/v17/leanback/app/BaseSupportFragment) - [BrandedFragment](https://developer.android.com/reference/android/support/v17/leanback/app/BrandedFragment) - [BrandedSupportFragment](https://developer.android.com/reference/android/support/v17/leanback/app/BrandedSupportFragment) - [BrowseFragment](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseFragment) - [BrowseFragment.BrowseTransitionListener](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseFragment.BrowseTransitionListener) - [BrowseFragment.FragmentFactory](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseFragment.FragmentFactory) - [BrowseFragment.ListRowFragmentFactory](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseFragment.ListRowFragmentFactory) - [BrowseFragment.MainFragmentAdapter](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseFragment.MainFragmentAdapter) - [BrowseFragment.MainFragmentAdapterRegistry](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseFragment.MainFragmentAdapterRegistry) - [BrowseFragment.MainFragmentRowsAdapter](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseFragment.MainFragmentRowsAdapter) - [BrowseSupportFragment](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment) - [BrowseSupportFragment.BrowseTransitionListener](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.BrowseTransitionListener) - [BrowseSupportFragment.FragmentFactory](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.FragmentFactory) - [BrowseSupportFragment.ListRowFragmentFactory](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.ListRowFragmentFactory) - [BrowseSupportFragment.MainFragmentAdapter](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapter) - [BrowseSupportFragment.MainFragmentAdapterRegistry](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentAdapterRegistry) - [BrowseSupportFragment.MainFragmentRowsAdapter](https://developer.android.com/reference/android/support/v17/leanback/app/BrowseSupportFragment.MainFragmentRowsAdapter) - [DetailsFragment](https://developer.android.com/reference/android/support/v17/leanback/app/DetailsFragment) - [DetailsFragmentBackgroundController](https://developer.android.com/reference/android/support/v17/leanback/app/DetailsFragmentBackgroundController) - [DetailsSupportFragment](https://developer.android.com/reference/android/support/v17/leanback/app/DetailsSupportFragment) - [DetailsSupportFragmentBackgroundController](https://developer.android.com/reference/android/support/v17/leanback/app/DetailsSupportFragmentBackgroundController) - [ErrorFragment](https://developer.android.com/reference/android/support/v17/leanback/app/ErrorFragment) - [ErrorSupportFragment](https://developer.android.com/reference/android/support/v17/leanback/app/ErrorSupportFragment) - [GuidedStepFragment](https://developer.android.com/reference/android/support/v17/leanback/app/GuidedStepFragment) - [GuidedStepSupportFragment](https://developer.android.com/reference/android/support/v17/leanback/app/GuidedStepSupportFragment) - [HeadersFragment](https://developer.android.com/reference/android/support/v17/leanback/app/HeadersFragment) - [HeadersSupportFragment](https://developer.android.com/reference/android/support/v17/leanback/app/HeadersSupportFragment) - [OnboardingFragment](https://developer.android.com/reference/android/support/v17/leanback/app/OnboardingFragment) - [OnboardingSupportFragment](https://developer.android.com/reference/android/support/v17/leanback/app/OnboardingSupportFragment) - [PlaybackFragment](https://developer.android.com/reference/android/support/v17/leanback/app/PlaybackFragment) - [PlaybackFragmentGlueHost](https://developer.android.com/reference/android/support/v17/leanback/app/PlaybackFragmentGlueHost) - [PlaybackSupportFragment](https://developer.android.com/reference/android/support/v17/leanback/app/PlaybackSupportFragment) - [PlaybackSupportFragmentGlueHost](https://developer.android.com/reference/android/support/v17/leanback/app/PlaybackSupportFragmentGlueHost) - [ProgressBarManager](https://developer.android.com/reference/android/support/v17/leanback/app/ProgressBarManager) - [RowsFragment](https://developer.android.com/reference/android/support/v17/leanback/app/RowsFragment) - [RowsFragment.MainFragmentAdapter](https://developer.android.com/reference/android/support/v17/leanback/app/RowsFragment.MainFragmentAdapter) - [RowsFragment.MainFragmentRowsAdapter](https://developer.android.com/reference/android/support/v17/leanback/app/RowsFragment.MainFragmentRowsAdapter) - [RowsSupportFragment](https://developer.android.com/reference/android/support/v17/leanback/app/RowsSupportFragment) - [RowsSupportFragment.MainFragmentAdapter](https://developer.android.com/reference/android/support/v17/leanback/app/RowsSupportFragment.MainFragmentAdapter) - [RowsSupportFragment.MainFragmentRowsAdapter](https://developer.android.com/reference/android/support/v17/leanback/app/RowsSupportFragment.MainFragmentRowsAdapter) - [SearchFragment](https://developer.android.com/reference/android/support/v17/leanback/app/SearchFragment) - [SearchSupportFragment](https://developer.android.com/reference/android/support/v17/leanback/app/SearchSupportFragment) - [VerticalGridFragment](https://developer.android.com/reference/android/support/v17/leanback/app/VerticalGridFragment) - [VerticalGridSupportFragment](https://developer.android.com/reference/android/support/v17/leanback/app/VerticalGridSupportFragment) - [VideoFragment](https://developer.android.com/reference/android/support/v17/leanback/app/VideoFragment) - [VideoFragmentGlueHost](https://developer.android.com/reference/android/support/v17/leanback/app/VideoFragmentGlueHost) - [VideoSupportFragment](https://developer.android.com/reference/android/support/v17/leanback/app/VideoSupportFragment) - [VideoSupportFragmentGlueHost](https://developer.android.com/reference/android/support/v17/leanback/app/VideoSupportFragmentGlueHost)