Android fragments Android数据绑定使片段全屏显示,中断导航
我有一个活动应用程序,底部有导航标签,使用Android架构导航组件 以下是其中一个片段的代码:Android fragments Android数据绑定使片段全屏显示,中断导航,android-fragments,android-databinding,android-architecture-navigation,Android Fragments,Android Databinding,Android Architecture Navigation,我有一个活动应用程序,底部有导航标签,使用Android架构导航组件 以下是其中一个片段的代码: public class ProfileFragment extends BaseFragment { private final int layout = R.layout.fragment_profile; //private final int layout = R.layout.fragment_profile_; private ProfileViewModel
public class ProfileFragment extends BaseFragment {
private final int layout = R.layout.fragment_profile;
//private final int layout = R.layout.fragment_profile_;
private ProfileViewModel mViewModel;
// FragmentProfileBinding mBinding;
public static ProfileFragment newInstance() {
return new ProfileFragment();
}
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container,
@Nullable Bundle savedInstanceState) {
return inflater.inflate(layout, container, false);
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
mViewModel = ViewModelProviders.of(this, viewModelFactory).get(ProfileViewModel.class);
// mBinding = DataBindingUtil.setContentView(getActivity(), layout);
// mBinding.setLifecycleOwner(this);
// mBinding.setVm(mViewModel);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
((mcApplication) getActivity().getApplication())
.getApplicationComponent()
.inject(this);
}
}
它有两个可能的版本(一个是带有数据绑定的版本,注释为)
没有数据绑定的当前版本工作正常,但具有数据绑定的版本会全屏显示片段,而不是在my MainActivity的androidx.navigation.fragment.NavHostFragment区域中显示片段。
数据绑定是有效的,我的问题是该片段显示全屏,并且尝试通过编程从该片段导航是无效的。所以在这种情况下,数据绑定破坏了一切。
我做错了什么
以下是片段_profile_.xml文件的内容:
<?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="vm"
type="com.synergy.megacampus3.viewmodel.ProfileViewModel" />
</data>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/username"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:text="@={vm.fullUserName}"
android:textColor="@color/mc_text_color_1"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/avatar"
tools:textSize="16sp" />
</LinearLayout>
</layout>
我的问题是我在错误的位置和方式初始化绑定。 工作代码如下:
public static ProfileFragment newInstance() {
return new ProfileFragment();
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
((mcApplication) getActivity().getApplication())
.getApplicationComponent()
.inject(this);
mViewModel = ViewModelProviders.of(this, viewModelFactory).get(ProfileViewModel.class);
}
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container,
@Nullable Bundle savedInstanceState) {
mBinding = DataBindingUtil.inflate(
inflater, layout, container, false);
View view = mBinding.getRoot();
mBinding.setLifecycleOwner(this);
mBinding.setVm(mViewModel);
return view;
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
代码取自为什么在onActivityCreated中定义viewModel,在onCreateView()中定义它?