Handle android rotate screen-CodePudding

How to handle android rotate screen if I have a fragment that observe the data from view model to fill recyclerview list ?! when rotation happened the data lost, so how can I handle it with viewmodel so the user didn't feel any different after rotation?

this is the part of the view model the return data:

 private fun getImageList(keyWord: String) {
        responseManager.loading()
        val disposable = imageListUseCase.execute(keyWord, { success ->
            responseManager.hideLoading()
            _observeImageListData.value = Event(success)
        }, { error ->
            responseManager.failed(error)
        })

        compositeDisposable.add(disposable)
    }

and here I set the recycler data on the fragment:

UPDATE

@AndroidEntryPoint
class ImagePickerFragment : Fragment() {

    private lateinit var imagePickerBinding: FragmentImagePickerBinding
    private val imagePickerViewModel: ImagePickerViewModel by activityViewModels()
    private lateinit var imagePickerAdapter: ImagePickerAdapter

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {

        imagePickerBinding = FragmentImagePickerBinding.inflate(inflater, container, false)
        observeImageList()
        observeSearchText()

        return imagePickerBinding.root
    }


    private fun observeImageList() {
        imagePickerViewModel.observeImageListData.observe(
            viewLifecycleOwner,
            EventObserver { imageList ->
                imagePickerAdapter = ImagePickerAdapter(imageList, imagePickerViewModel)
                imagePickerBinding.apply {
                    rvImageList.setHasFixedSize(true)
                    rvImageList.layoutManager = GridLayoutManager(requireContext(),2)
                    rvImageList.adapter = imagePickerAdapter
                }
            })
    }

Any tips?

UPDATE :

The viewModel extends from BaseViewModel :

abstract class BaseViewModel: ViewModel() {

    val compositeDisposable = CompositeDisposable()

    override fun onCleared() {
        super.onCleared()
        compositeDisposable.clear()
    }
}

and this is the full viewmodel:

@HiltViewModel
class ImagePickerViewModel @Inject constructor(
    private val imageListUseCase: ImageListUseCase,
    private val responseManager: ResponseManager
) : BaseViewModel() {

    private val _observeImageListData = MutableLiveData<Event<ArrayList<Image>>>()


    init {
        getImageList(Constants.KEY_WORD)
    }


    private fun getImageList(keyWord: String) {
        responseManager.loading()
        val disposable = imageListUseCase.execute(keyWord, { success ->
            responseManager.hideLoading()
            _observeImageListData.value = Event(success)
        }, { error ->
            responseManager.failed(error)
        })

        compositeDisposable.add(disposable)
    }

    fun filterSearchKeyWord(filteredKeyWord: String) {
        if(filteredKeyWord.isNotEmpty())
            getImageList(filteredKeyWord)
    }

    //getters:
    val observeImageListData: LiveData<Event<ArrayList<Image>>>
        get() = _observeImageListData
}

CodePudding user response：

In the Activity Tag of manifest file, you should have to mention

<activity
    android:name="com.example.ListActivity"
    android:label="@string/app_name" 
    android:configChanges="keyboardHidden|orientation">

If you are using Android 2.3(API level 13 ) and above use

<activity
    android:name="com.example.Activity"
    android:label="@string/app_name" 
    android:configChanges="keyboardHidden|orientation|screenSize">

CodePudding user response：

In your manifest, try putting this in your activity tag:

android:configChanges="orientation"

So it looks like:

       <activity
        android:name=".MainActivity"
        android:configChanges="orientation"
        android:exported="true">