Java Android:MVVM模式下屏幕旋转时UI和数据不存在

我尝试在我的

活动中实现从这里显示数据：（）。我尝试使用数据绑定更新UI，一切都很顺利，直到我尝试旋转屏幕，我从
logcat
中看到数据总是重新加载，我的
ImageView
总是刷新，这是我的活动：

     public class DetailActivity extends BaseActivity<ActivityDetailBinding, DetailViewModel> implements DetailNavigator {
    @Inject
    ViewModelProviderFactory factory;

    private DetailViewModel detailViewModel;

    public static final String INTENT_ID = "id_intent";

    public static final String INTENT_FLAG = "id_flag";

    private ActivityDetailBinding mActivityDetailBinding;

    public static Intent newIntent(Context context) {
        return new Intent(context, DetailActivity.class);
    }

    @Override
    public int getBindingVariable() {
        return BR.viewModel;
    }

    @Override
    public int getLayoutId() {
        return R.layout.activity_detail;
    }

    @Override
    public DetailViewModel getViewModel() { 
detailViewModel = ViewModelProviders.of(this, factory).get(DetailViewModel.class);
        return detailViewModel;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        detailViewModel.setNavigator(this);
        mActivityDetailBinding = getViewDataBinding();
        initView();
        initData(savedInstanceState);

    }


    private void initData(Bundle savedInstanceState) {
        Bundle extras = getIntent().getExtras();
        if (extras != null) {
            int id = extras.getInt(INTENT_ID, 0);
            int flag = extras.getInt(INTENT_FLAG, 0);
            detailViewModel.fetchDetail(id, flag);
        }
    }

    private void initView() {
        if (getSupportActionBar() != null) {
            getSupportActionBar().hide();
        }
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
    }


    @Override
    public void ShowProgressDialog(Boolean loading) {
        if (loading) {
            showLoading();
        } else {
            hideLoading();
        }
    }
    }

这是我的
ViewModelFactory
类：

@Singleton
public class ViewModelProviderFactory extends ViewModelProvider.NewInstanceFactory {

    private final DataManager dataManager;
    private final SchedulerProvider schedulerProvider;

    @Inject
    public ViewModelProviderFactory(DataManager dataManager,
                                    SchedulerProvider schedulerProvider) {
        this.dataManager = dataManager;
        this.schedulerProvider = schedulerProvider;
    }

    @Override
    public <T extends ViewModel> T create(Class<T> modelClass) {
        if (modelClass.isAssignableFrom(DetailViewModel.class)) {
            return (T) new DetailViewModel(dataManager,schedulerProvider);
        }
        throw new IllegalArgumentException("Unknown class name");
    }
}

    public class DetailViewModel extends BaseViewModel<DetailNavigator> {

    private final ObservableField<String> originalName = new ObservableField<>();
    private final ObservableField<String> releaseDate = new ObservableField<>();
    private final ObservableField<String> overview = new ObservableField<>();
    private final ObservableField<String> genreMovie = new ObservableField<>();
    private final ObservableField<String> posterPath = new ObservableField<>();
    private final ObservableField<String> voteAverage = new ObservableField<>();

    public DetailViewModel(DataManager dataManager, SchedulerProvider schedulerProvider) {
        super(dataManager, schedulerProvider);
    }

    public void fetchDetail(int id, int flag) {
        if (flag == 1) {
            getNavigator().ShowProgressDialog(true);
            getCompositeDisposable().add(getDataManager()
                    .getApiHelper().doDetailMovie(id, URLConfig.API_KEY, getDataManager().getLanguage())
                    .subscribeOn(getSchedulerProvider().io())
                    .observeOn(getSchedulerProvider().ui())
                    .subscribe(detailResponse -> {
                        setUpData(detailResponse);
                        getNavigator().ShowProgressDialog(false);
//                        getNavigator().updateView();
                    }, throwable -> {
                        getNavigator().ShowProgressDialog(false);
                    }));
        } else if (flag == 2) {
            getNavigator().ShowProgressDialog(true);
            getCompositeDisposable().add(getDataManager()
                    .getApiHelper().doDetailTV(id, URLConfig.API_KEY, getDataManager().getLanguage())
                    .subscribeOn(getSchedulerProvider().io())
                    .observeOn(getSchedulerProvider().ui())
                    .subscribe(detailResponse -> {
                        setUpData(detailResponse);
                        getNavigator().ShowProgressDialog(false);
                    }, throwable -> {
                        getNavigator().ShowProgressDialog(false);
                    }));
        }
    }

    private void setUpData(DetailResponse detailResponse) {
        if (detailResponse.getOriginal_name() != null) {
            originalName.set(detailResponse.getOriginal_name());
        } else if (detailResponse.getOriginal_title() != null) {
            originalName.set(detailResponse.getOriginal_title());
        } else {

        }

        if (detailResponse.getFirst_air_date() != null) {
            releaseDate.set(detailResponse.getFirst_air_date());
        } else {
            releaseDate.set(detailResponse.getRelease_date());
        }

        if (!detailResponse.getOverview().equals("")) {
            overview.set(detailResponse.getOverview());
        } else {
            overview.set(getNavigator().noDesc());
        }

        posterPath.set(String.valueOf(detailResponse.getPoster_path()));

        voteAverage.set(String.valueOf(detailResponse.getVote_average()));

        String genres = "";

        for (int i = 0; i < detailResponse.getGenreList().size(); i++) {
            genres = genres + detailResponse.getGenreList().get(i).getName();
            if (i != detailResponse.getGenreList().size() - 1) {
                genres = genres + ", ";
            }
        }

        genreMovie.set(genres);

    }

    public ObservableField<String> getOriginalName() {
        return originalName;
    }

    public ObservableField<String> getReleaseDate() {
        return releaseDate;
    }

    public ObservableField<String> getOverview() {
        return overview;
    }

    public ObservableField<String> getGenreMovie() {
        return genreMovie;
    }

    public ObservableField<String> getPosterPath() {
        return posterPath;
    }

    public ObservableField<String> getVoteAverage() {
        return voteAverage;
    }
}

这是我的
DetailResponse
课程：

public class DetailResponse {
    @SerializedName("original_name")
    private String original_name ;
    @SerializedName("original_title")
    private String original_title ;
    @SerializedName("release_date")
    private String release_date ;
    @SerializedName("first_air_date")
    private String first_air_date ;
    @SerializedName("vote_average")
    private Double vote_average ;
    @SerializedName("overview")
    private String overview ;
    @SerializedName("poster_path")
    private String poster_path;
    @SerializedName("genres")
    private List<Genre> genreList;

    public String getOriginal_name() {
        return original_name;
    }

    public String getOriginal_title() {
        return original_title;
    }

    public String getRelease_date() {
        return release_date;
    }

    public String getFirst_air_date() {
        return first_air_date;
    }

    public Double getVote_average() {
        return vote_average;
    }

    public String getOverview() {
        return overview;
    }

    public String getPoster_path() {
        return poster_path;
    }

    public List<Genre> getGenreList() {
        return genreList;
    }

    public static class Genre{
        @SerializedName("name")
        private String name ;

        public String getName() {
            return name;
        }
    }
}

公共类详细信息响应{
@SerializedName（“原始名称”）
私有字符串原始名称；
@序列化名称（“原始标题”）
私有字符串原始标题；
@序列化名称（“发布日期”）
私有字符串发布日期；
@序列化名称（“首次发布日期”）
私有字符串首个\u air\u日期；
@序列化名称（“投票平均值”）
私人双票平均；
@序列化名称（“概述”）
私有字符串概述；
@序列化名称（“海报路径”）
私家车路线;；
@序列化名称（“流派”）
私有列表genreList；
公共字符串getOriginal_name（）{
返回原始名称；
}
公共字符串getOriginal_title（）{
返回原始标题；
}
公共字符串getRelease_date（）{
返回发布日期；
}
公共字符串getFirst\u air\u date（）{
返回第一个空气日期；
}
公众双倍投票（平均值）{
返回平均值；
}
公共字符串getOverview（）{
退货概述；
}
公共字符串getPoster_path（）{
回程;；
}
公共列表getGenreList（）{
返回genreList；
}
公共静态类体裁{
@序列化名称（“名称”）
私有字符串名称；
公共字符串getName（）{
返回名称；
}
}
}

最后一个，我是如何尝试使用数据绑定在UI中获取数据的，这是我的布局：

  <?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context=".ui.detail.DetailActivity">

    <data>

        <import type="android.view.View" />
        <variable
            name="viewModel"
            type="id.dicoding.eriza.moviecatalogue.ui.detail.DetailViewModel" />
    </data>
<androidx.core.widget.NestedScrollView
    android:id="@+id/nestedScrollView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fillViewport="true">


    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:animateLayoutChanges="true">

        <com.github.florent37.shapeofview.shapes.ArcView
            android:id="@+id/shape_header"
            android:layout_width="match_parent"
            android:layout_height="@dimen/size300dp"
            android:alpha="0.7"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:shape_arc_cropDirection="outside"
            app:shape_arc_height="@dimen/size30dp"
            app:shape_arc_position="bottom">

            <com.flaviofaria.kenburnsview.KenBurnsView
                android:id="@+id/image_header"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:scaleType="centerCrop"
                android:src="@drawable/poster_avengerinfinity"
                app:imageDetailUrl="@{viewModel.posterPath}"
                android:tint="#6F000000" />

        </com.github.florent37.shapeofview.shapes.ArcView>

        <com.github.florent37.shapeofview.shapes.RoundRectView
            android:id="@+id/shape_poster"
            android:layout_width="@dimen/size150dp"
            android:layout_height="@dimen/size200dp"
            android:layout_marginTop="@dimen/margin250dp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="@+id/shape_header"
            app:shape_roundRect_bottomLeftRadius="@dimen/corner10dp"
            app:shape_roundRect_bottomRightRadius="@dimen/corner10dp"
            app:shape_roundRect_topLeftRadius="@dimen/corner10dp"
            app:shape_roundRect_topRightRadius="@dimen/corner10dp">

            <ImageView
                android:id="@+id/image_poster"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:contentDescription="@string/hint_poster"
                android:scaleType="fitXY"
                app:imageDetailUrl="@{viewModel.posterPath}"
                android:src="@drawable/poster_avengerinfinity" />

        </com.github.florent37.shapeofview.shapes.RoundRectView>

        <TextView
            android:id="@+id/text_title"
            style="@style/FontText.Title.Detail"
            android:layout_marginTop="@dimen/margin15dp"
            android:textSize="@dimen/font_large_size"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/shape_poster"
            android:text="@{viewModel.originalName}"
            tools:text="@string/hint_title" />

        <TextView
            android:id="@+id/text_title_release"
            style="@style/FontText"
            android:layout_marginTop="@dimen/margin10dp"
            android:text="@string/text_release"
            app:layout_constraintEnd_toStartOf="@+id/guideline"
            android:visibility="@{viewModel.isConnected ? View.VISIBLE : View.GONE}"
            app:layout_constraintTop_toBottomOf="@+id/text_title" />

        <TextView
            android:id="@+id/text_release"
            style="@style/FontText"
            android:layout_marginStart="@dimen/margin2dp"
            android:layout_marginTop="@dimen/margin10dp"
            android:text="@{viewModel.releaseDate}"
            android:visibility="@{viewModel.isConnected ? View.VISIBLE : View.GONE}"
            app:layout_constraintStart_toEndOf="@+id/text_title_release"
            app:layout_constraintTop_toBottomOf="@+id/text_title"
            tools:text="@string/hint_release" />

        <TextView
            android:id="@+id/text_genres"
            style="@style/FontText.Normal"
            android:layout_marginStart="@dimen/margin15dp"
            android:layout_marginTop="@dimen/margin10dp"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/text_release"
            android:text="@{viewModel.genreMovie}"
            tools:text="@string/hint_genres" />
        <RatingBar
            android:id="@+id/rating_bar"
            android:layout_width="wrap_content"
            android:layout_height="45dp"
            android:layout_marginStart="@dimen/margin15dp"
            android:layout_marginTop="@dimen/margin5dp"
            android:isIndicator="true"
            android:numStars="5"
            android:rating="3.8"
            android:stepSize="0.1"
            android:visibility="@{viewModel.isConnected ? View.VISIBLE : View.GONE}"
            app:layout_constraintStart_toStartOf="parent"
            app:ratingBar="@{viewModel.voteAverage}"
            app:layout_constraintTop_toBottomOf="@+id/text_genres" />

        <TextView
            android:id="@+id/text_rating"
            style="@style/FontText.Rating.Orange"
            android:layout_marginStart="@dimen/margin5dp"
            app:layout_constraintRight_toLeftOf="parent"
            app:layout_constraintStart_toEndOf="@+id/rating_bar"
            app:layout_constraintTop_toBottomOf="@+id/text_genres"
            android:text="@{viewModel.voteAverage}"
            tools:text="@string/hit_rating" />

        <TextView
            android:id="@+id/text_default_rating"
            style="@style/FontText.Rating"
            android:textStyle="normal"
            android:visibility="@{viewModel.isConnected ? View.VISIBLE : View.GONE}"
            app:layout_constraintRight_toLeftOf="parent"
            app:layout_constraintStart_toEndOf="@+id/text_rating"
            app:layout_constraintTop_toBottomOf="@+id/text_genres"
            android:text="@string/hint_default_rating" />

        <TextView
            android:id="@+id/text_desc"
            style="@style/FontText"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginStart="@dimen/margin15dp"
            android:layout_marginTop="@dimen/margin25dp"
            android:layout_marginEnd="@dimen/margin15dp"
            android:paddingBottom="@dimen/padding100dp"
            app:layout_constraintTop_toBottomOf="@+id/rating_bar"
            android:text="@{viewModel.overview}"
            tools:text="@string/hint_desc" />

        <androidx.constraintlayout.widget.Guideline
            android:id="@+id/guideline"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            app:layout_constraintGuide_percent="0.5" />

    </androidx.constraintlayout.widget.ConstraintLayout>


</androidx.core.widget.NestedScrollView>
</layout>



我认为
ViewModel
应该管理活动生命周期中相关数据的UI，tt允许在应用程序中保留配置更改，但在我的情况下，
data
是保留的，但是当我检查
logcat
时，
fetchDetail（）
DetailViewModel
类中的
在屏幕旋转时总是被调用，而我的
ImageView
在我旋转屏幕时也会刷新，所以我认为
viewModel
在屏幕旋转时不会管理我的UI。我的代码有问题吗

希望任何人都能帮助我，告诉我哪里是我的错，我必须做什么。非常感谢。
打开应用程序。之后进入飞行模式。然后旋转屏幕。检查viewmodel是否在配置更改后仍然有效。
viewmodel
在飞机模式下的配置更改时仍然有效，并且
ImageView
是alos survive，但是我在没有连接时设置的
视图
的一些可见性：消失了，并且只有当
活动
第一次创建说
没有连接
时才会显示一条错误消息。我不明白的是为什么方法
FetchDetail（）
当我旋转屏幕时，是否总是调用？这使得我的
ViewModel
无法保存已经存在的UIcreated@user1506104因此
ViewModel
无法避免调用
onCreate（）
的
Activity
？
  <?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context=".ui.detail.DetailActivity">

    <data>

        <import type="android.view.View" />
        <variable
            name="viewModel"
            type="id.dicoding.eriza.moviecatalogue.ui.detail.DetailViewModel" />
    </data>
<androidx.core.widget.NestedScrollView
    android:id="@+id/nestedScrollView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fillViewport="true">


    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:animateLayoutChanges="true">

        <com.github.florent37.shapeofview.shapes.ArcView
            android:id="@+id/shape_header"
            android:layout_width="match_parent"
            android:layout_height="@dimen/size300dp"
            android:alpha="0.7"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:shape_arc_cropDirection="outside"
            app:shape_arc_height="@dimen/size30dp"
            app:shape_arc_position="bottom">

            <com.flaviofaria.kenburnsview.KenBurnsView
                android:id="@+id/image_header"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:scaleType="centerCrop"
                android:src="@drawable/poster_avengerinfinity"
                app:imageDetailUrl="@{viewModel.posterPath}"
                android:tint="#6F000000" />

        </com.github.florent37.shapeofview.shapes.ArcView>

        <com.github.florent37.shapeofview.shapes.RoundRectView
            android:id="@+id/shape_poster"
            android:layout_width="@dimen/size150dp"
            android:layout_height="@dimen/size200dp"
            android:layout_marginTop="@dimen/margin250dp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="@+id/shape_header"
            app:shape_roundRect_bottomLeftRadius="@dimen/corner10dp"
            app:shape_roundRect_bottomRightRadius="@dimen/corner10dp"
            app:shape_roundRect_topLeftRadius="@dimen/corner10dp"
            app:shape_roundRect_topRightRadius="@dimen/corner10dp">

            <ImageView
                android:id="@+id/image_poster"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:contentDescription="@string/hint_poster"
                android:scaleType="fitXY"
                app:imageDetailUrl="@{viewModel.posterPath}"
                android:src="@drawable/poster_avengerinfinity" />

        </com.github.florent37.shapeofview.shapes.RoundRectView>

        <TextView
            android:id="@+id/text_title"
            style="@style/FontText.Title.Detail"
            android:layout_marginTop="@dimen/margin15dp"
            android:textSize="@dimen/font_large_size"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/shape_poster"
            android:text="@{viewModel.originalName}"
            tools:text="@string/hint_title" />

        <TextView
            android:id="@+id/text_title_release"
            style="@style/FontText"
            android:layout_marginTop="@dimen/margin10dp"
            android:text="@string/text_release"
            app:layout_constraintEnd_toStartOf="@+id/guideline"
            android:visibility="@{viewModel.isConnected ? View.VISIBLE : View.GONE}"
            app:layout_constraintTop_toBottomOf="@+id/text_title" />

        <TextView
            android:id="@+id/text_release"
            style="@style/FontText"
            android:layout_marginStart="@dimen/margin2dp"
            android:layout_marginTop="@dimen/margin10dp"
            android:text="@{viewModel.releaseDate}"
            android:visibility="@{viewModel.isConnected ? View.VISIBLE : View.GONE}"
            app:layout_constraintStart_toEndOf="@+id/text_title_release"
            app:layout_constraintTop_toBottomOf="@+id/text_title"
            tools:text="@string/hint_release" />

        <TextView
            android:id="@+id/text_genres"
            style="@style/FontText.Normal"
            android:layout_marginStart="@dimen/margin15dp"
            android:layout_marginTop="@dimen/margin10dp"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/text_release"
            android:text="@{viewModel.genreMovie}"
            tools:text="@string/hint_genres" />
        <RatingBar
            android:id="@+id/rating_bar"
            android:layout_width="wrap_content"
            android:layout_height="45dp"
            android:layout_marginStart="@dimen/margin15dp"
            android:layout_marginTop="@dimen/margin5dp"
            android:isIndicator="true"
            android:numStars="5"
            android:rating="3.8"
            android:stepSize="0.1"
            android:visibility="@{viewModel.isConnected ? View.VISIBLE : View.GONE}"
            app:layout_constraintStart_toStartOf="parent"
            app:ratingBar="@{viewModel.voteAverage}"
            app:layout_constraintTop_toBottomOf="@+id/text_genres" />

        <TextView
            android:id="@+id/text_rating"
            style="@style/FontText.Rating.Orange"
            android:layout_marginStart="@dimen/margin5dp"
            app:layout_constraintRight_toLeftOf="parent"
            app:layout_constraintStart_toEndOf="@+id/rating_bar"
            app:layout_constraintTop_toBottomOf="@+id/text_genres"
            android:text="@{viewModel.voteAverage}"
            tools:text="@string/hit_rating" />

        <TextView
            android:id="@+id/text_default_rating"
            style="@style/FontText.Rating"
            android:textStyle="normal"
            android:visibility="@{viewModel.isConnected ? View.VISIBLE : View.GONE}"
            app:layout_constraintRight_toLeftOf="parent"
            app:layout_constraintStart_toEndOf="@+id/text_rating"
            app:layout_constraintTop_toBottomOf="@+id/text_genres"
            android:text="@string/hint_default_rating" />

        <TextView
            android:id="@+id/text_desc"
            style="@style/FontText"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginStart="@dimen/margin15dp"
            android:layout_marginTop="@dimen/margin25dp"
            android:layout_marginEnd="@dimen/margin15dp"
            android:paddingBottom="@dimen/padding100dp"
            app:layout_constraintTop_toBottomOf="@+id/rating_bar"
            android:text="@{viewModel.overview}"
            tools:text="@string/hint_desc" />

        <androidx.constraintlayout.widget.Guideline
            android:id="@+id/guideline"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            app:layout_constraintGuide_percent="0.5" />

    </androidx.constraintlayout.widget.ConstraintLayout>


</androidx.core.widget.NestedScrollView>
</layout>