我想从实时数据中获取值(value)并更新用户界面，但收到数据时它没有显示任何内容。代码有什么问题？
ProfileModel.java
public class ProfileModel {
public ObservableField<String> imageUrl = new ObservableField<>();
public ObservableField<String> name = new ObservableField<>();
public ObservableField<String> lastName = new ObservableField<>();
public ObservableField<String> problemDescription = new ObservableField<>();
public ObservableField<Date> birthDay = new ObservableField<>();
public ProfileModel(String imageUrl,
String name,
String lastName,
String problemDescription,
Date birthDay) {
this.imageUrl.set(imageUrl);
this.name.set(name);
this.lastName.set(lastName);
this.problemDescription.set(problemDescription);
this.birthDay.set(birthDay);
}
public ObservableField<String> getImageUrl() {
return imageUrl;
}
public void setImageUrl(ObservableField<String> imageUrl) {
this.imageUrl = imageUrl;
}
public ObservableField<String> getName() {
return name;
}
public void setName(ObservableField<String> name) {
this.name = name;
}
public ObservableField<String> getLastName() {
return lastName;
}
public void setLastName(ObservableField<String> lastName) {
this.lastName = lastName;
}
public ObservableField<String> getProblemDescription() {
return problemDescription;
}
public void setProblemDescription(ObservableField<String> problemDescription) {
this.problemDescription = problemDescription;
}
public ObservableField<Date> getBirthDay() {
return birthDay;
}
public void setBirthDay(ObservableField<Date> birthDay) {
this.birthDay = birthDay;
}
@Override
public String toString() {
return "ProfileModel{" +
"imageUrl=" + imageUrl.get() +
", name=" + name.get() +
", lastName=" + lastName +
", problemDescription=" + problemDescription +
", birthDay=" + birthDay +
'}';
}
}
ProfileViewModel.java
public class ProfileViewModel extends BaseViewModel<ProfileNavigator> {
private MutableLiveData<ProfileModel> profileModelMutableLiveData;
public ProfileViewModel(DataManager dataManager, SchedulerProvider schedulerProvider) {
super(dataManager, schedulerProvider);
profileModelMutableLiveData = new MutableLiveData<>();
fetchRepos();
}
public void fetchRepos() {
setIsLoading(true);
getCompositeDisposable().add(getDataManager()
.getProfileModel()
.subscribeOn(getSchedulerProvider().io())
.observeOn(getSchedulerProvider().ui())
.subscribe(profileModel -> {
Log.d("livedata",profileModel.toString());
profileModelMutableLiveData.setValue(profileModel);
setIsLoading(false);
}, throwable -> {
setIsLoading(false);
getNavigator().handleError(throwable);
}));
}
public LiveData<ProfileModel> getProfileModelMutableLiveData() {
return profileModelMutableLiveData;
}
public void onPremiumClick(){
}
}
BaseFragment.java
public abstract class BaseFragment<T extends ViewDataBinding, V extends BaseViewModel> extends Fragment {
protected FragmentNavigation mFragmentNavigation;
private BaseActivity mActivity;
private View mRootView;
private T mViewDataBinding;
private V mViewModel;
public abstract int getBindingVariable();
public abstract
@LayoutRes
int getLayoutId();
public abstract V getViewModel();
@Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof BaseActivity) {
BaseActivity activity = (BaseActivity) context;
this.mActivity = activity;
activity.onFragmentAttached();
}
if (context instanceof FragmentNavigation) {
mFragmentNavigation = (FragmentNavigation) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentInteractionListener");
}
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
performDependencyInjection();
super.onCreate(savedInstanceState);
mViewModel = getViewModel();
setHasOptionsMenu(false);
}
@Override
public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
mViewDataBinding = DataBindingUtil.inflate(inflater, getLayoutId(), container, false);
mRootView = mViewDataBinding.getRoot();
return mRootView;
}
public BaseActivity getBaseActivity() {
return mActivity;
}
public T getViewDataBinding() {
return mViewDataBinding;
}
public void hideKeyboard() {
if (mActivity != null) {
mActivity.hideKeyboard();
}
}
public boolean isNetworkConnected() {
return mActivity != null && mActivity.isNetworkConnected();
}
public void openActivityOnTokenExpire() {
if (mActivity != null) {
mActivity.openActivityOnTokenExpire();
}
}
private void performDependencyInjection() {
AndroidSupportInjection.inject(this);
}
public interface Callback {
void onFragmentAttached();
void onFragmentDetached(String tag);
}
}
public class ProfileFragment
extends BaseFragment<FragmentProfileBinding,ProfileViewModel> implements ProfileNavigator {
@Inject
ViewModelProviderFactory factory;
FragmentProfileBinding mFragmentProfileBinding;
ProfileViewModel mProfileViewModel;
public ProfileFragment() {
// Required empty public constructor
}
public static ProfileFragment newInstance() {
ProfileFragment fragment = new ProfileFragment();
Bundle args = new Bundle();
// args.putString(ARG_PARAM1, param1);
// args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
@Override
public int getBindingVariable() {
return BR.viewModel;
}
@Override
public int getLayoutId() {
return R.layout.fragment_profile;
}
@Override
public ProfileViewModel getViewModel() {
mProfileViewModel= ViewModelProviders.of(this, factory).get(ProfileViewModel.class);
return mProfileViewModel;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mProfileViewModel.setNavigator(this);
}
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
mFragmentProfileBinding = getViewDataBinding();
}
@Override
public void handleError(Throwable throwable) {
}
}
<?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">
<data>
<variable
name="viewModel"
type="ir.basamadazmanovin.heartrate.ui.main.profile.ProfileViewModel" />
</data>
<androidx.swiperefreshlayout.widget.SwipeRefreshLayout
android:id="@+id/activity_login_swipe_refresh_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:refreshing="@{viewModel.isLoading}">
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/md_grey_200">
<androidx.cardview.widget.CardView
android:id="@+id/cardView2"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
app:layout_constraintBottom_toTopOf="@+id/guideline18"
app:layout_constraintEnd_toStartOf="@+id/guideline13"
app:layout_constraintStart_toStartOf="@+id/guideline12"
app:layout_constraintTop_toTopOf="@+id/guideline17">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:text="Free Account"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/guideline21"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline21"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.5" />
<mehdi.sakout.fancybuttons.FancyButton
android:id="@+id/activity_login_login_btn"
android:layout_width="124dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:onClick="@{()-> viewModel.onPremiumClick()}"
android:paddingStart="16dp"
android:paddingTop="8dp"
android:paddingEnd="16dp"
android:paddingBottom="8dp"
app:fb_borderColor="#FFFFFF"
app:fb_borderWidth="1dp"
app:fb_defaultColor="@color/button_color"
app:fb_focusColor="@color/button_color"
app:fb_radius="@dimen/button_radius"
app:fb_text="Premium"
app:fb_textColor="#FFFFFF"
app:fb_textSize="@dimen/button_textSize"
app:layout_constraintBottom_toBottomOf="@+id/textView2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="@+id/guideline21"
app:layout_constraintTop_toTopOf="@+id/textView2" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>
<View
android:id="@+id/view2"
android:layout_width="0dp"
android:layout_height="0dp"
android:background="@color/material_blue400"
android:visibility="visible"
app:layout_constraintBottom_toTopOf="@+id/guideline19"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.675" />
<de.hdodenhof.circleimageview.CircleImageView
android:id="@+id/circleImageView"
android:layout_width="124dp"
android:layout_height="124dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:src="@mipmap/ic_launcher_round"
app:civ_border_color="@color/material_white"
app:civ_border_width="2dp"
app:layout_constraintBottom_toTopOf="@+id/guideline17"
app:layout_constraintEnd_toStartOf="@+id/guideline20"
app:layout_constraintStart_toStartOf="@+id/guideline20"
app:layout_constraintTop_toTopOf="@+id/guideline14"
app:layout_constraintVertical_bias="0.358" />
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp"
android:text="@{viewModel.getProfileModelMutableLiveData.name}"
android:textColor="@color/material_white"
app:layout_constraintBottom_toTopOf="@+id/guideline17"
app:layout_constraintEnd_toEndOf="@+id/circleImageView"
app:layout_constraintStart_toStartOf="@+id/circleImageView"
app:layout_constraintTop_toBottomOf="@+id/circleImageView" />
<androidx.cardview.widget.CardView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="@+id/cardView2"
app:layout_constraintStart_toStartOf="@+id/cardView2"
app:layout_constraintTop_toTopOf="@+id/guideline18">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.material.textfield.TextInputLayout
android:id="@+id/textInputLayout"
style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
app:errorEnabled="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0">
<com.google.android.material.textfield.TextInputEditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="First Name" />
</com.google.android.material.textfield.TextInputLayout>
<com.google.android.material.textfield.TextInputLayout
android:id="@+id/textInputLayout2"
style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="4dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
app:errorEnabled="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="@+id/textInputLayout"
app:layout_constraintStart_toStartOf="@+id/textInputLayout"
app:layout_constraintTop_toBottomOf="@+id/textInputLayout"
app:layout_constraintVertical_bias="0.0">
<com.google.android.material.textfield.TextInputEditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Last Name" />
</com.google.android.material.textfield.TextInputLayout>
<com.google.android.material.textfield.TextInputLayout
android:id="@+id/textInputLayout5"
style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="4dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
app:errorEnabled="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/textInputLayout4"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textInputLayout2"
app:layout_constraintVertical_bias="0.0">
<com.google.android.material.textfield.TextInputEditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Year" />
</com.google.android.material.textfield.TextInputLayout>
<com.google.android.material.textfield.TextInputLayout
android:id="@+id/textInputLayout4"
style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="4dp"
android:layout_marginBottom="8dp"
app:errorEnabled="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/textInputLayout3"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/textInputLayout5"
app:layout_constraintTop_toBottomOf="@+id/textInputLayout2"
app:layout_constraintVertical_bias="0.0">
<com.google.android.material.textfield.TextInputEditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Month" />
</com.google.android.material.textfield.TextInputLayout>
<com.google.android.material.textfield.TextInputLayout
android:id="@+id/textInputLayout3"
style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="4dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
app:errorEnabled="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/textInputLayout4"
app:layout_constraintTop_toBottomOf="@+id/textInputLayout2"
app:layout_constraintVertical_bias="0.0">
<com.google.android.material.textfield.TextInputEditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Day" />
</com.google.android.material.textfield.TextInputLayout>
<com.google.android.material.textfield.TextInputLayout
style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="4dp"
android:layout_marginBottom="8dp"
app:errorEnabled="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="@+id/textInputLayout3"
app:layout_constraintStart_toStartOf="@+id/textInputLayout5"
app:layout_constraintTop_toBottomOf="@+id/textInputLayout4"
app:layout_constraintVertical_bias="0.0">
<com.google.android.material.textfield.TextInputEditText
android:layout_width="match_parent"
android:layout_height="128dp"
android:hint="Describe Your Problems Here" />
</com.google.android.material.textfield.TextInputLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline12"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_begin="8dp" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline13"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_end="8dp" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline14"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_begin="8dp" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline16"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.5" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline17"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.3" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline18"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.4" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline19"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.35" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline20"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.5" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline22"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.45" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.core.widget.NestedScrollView>
</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
</layout>
android:text="@{viewModel.getProfileModelMutableLiveData.name}"
这是我想在收到数据时进行更改的地方，但即使实时数据具有值，它也不会显示该值
最佳答案
您需要在 onCreateView() 中为绑定(bind)设置变量。
mViewDataBinding.setVariable(getBindingVariable(), mViewModel);
mViewDataBinding.executePendingBindings();
关于android - 如何获取xml文件中实时数据的值数据绑定(bind)android，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/55724937/