的DatePicker與數據綁定和Rxjava可觀測視圖不保存到境界上不同的Android版本

Question

下面運行該代碼與Android版本SDK 16.但是一個機器人仿真器以某種方式，當它運行在與Android版本> 21，數據綁定與境界模擬器儲蓄不被觸發..

我應該如何與Android版本來處理？

是因爲所呈現的UI在不同的Android版本不同，所以數據綁定不會有任何的工作？

這裏這段代碼視圖模型

@PerFragment 
public class OnboardDOBViewModel extends BaseHelperViewModel<BaseUserView> implements IOnboardDOBViewModel { 

private String TAG = getClass().getSimpleName(); 
private HelperRepo mHelperRepo; 
private UserRepo mUserRepo; 
private Helper mHelper; 

public final ObservableField<Integer> datePicker = new ObservableField<>(); 
public final ObservableField<Integer> monthPicker = new ObservableField<>(); 
public final ObservableField<Integer> yearPicker = new ObservableField<>(); 

public ReadOnlyField dobSelected; 

private CompositeDisposable mCompositeDisposable = new CompositeDisposable(); 

@Inject 
public OnboardDOBViewModel(@AppContext Context context, UserRepo userRepo, HelperRepo helperRepo) { 
    super(context, userRepo, helperRepo); 
    Log.d(TAG, "OnboardDOBViewModel: "); 
    this.mUserRepo = userRepo; 
    this.mHelperRepo = helperRepo; 
} 

@Override 
public void attachView(BaseUserView view, @Nullable Bundle savedInstanceState) { 
    super.attachView(view, savedInstanceState); 
    Log.d(TAG, "attachView"); 

    mHelper = mHelperRepo.getByUser("user.id", mUserRepo.getCurrentUser(), false); 

    if (mHelper != null) { 
     Calendar c = Calendar.getInstance(); 
     yearPicker.set(c.get(Calendar.YEAR)-23); 
     monthPicker.set(c.get(Calendar.MONTH)); 
     datePicker.set(c.get(Calendar.DAY_OF_MONTH)); 
    } 

    Observable<String> dobSelected = Observable.combineLatest(
      Utils.toObservable(monthPicker), 
      Utils.toObservable(datePicker), 
      Utils.toObservable(yearPicker), 
      (integer, integer2, integer3) -> { 

       String dobSelected1 = String.valueOf(monthPicker.get() + 1) + "-" + 
         datePicker.get().toString() + "-" + 
         yearPicker.get().toString(); 
       Log.d(TAG, "apply: " + dobSelected1); 
       SimpleDateFormat sdf = new SimpleDateFormat("MM-dd-yyyy", Locale.getDefault()); 
       Date date = sdf.parse(dobSelected1); 
       Log.d(TAG, "apply: date selected" + date); 

       Helper helper = mHelperRepo.getByUser("user.id", mUserRepo.getCurrentUser(), true); 
       assert helper != null; 
       helper.setDateOfBirth(date); 
       mHelperRepo.save(helper); 
       return dobSelected1; 
      }); 

    this.dobSelected = Utils.toField(dobSelected); 
} 

這是發現這個作爲我的答案XML

<data> 

    <variable 
     name="vm" 
     type="...OnboardDOBViewModel" /> 
</data> 

<LinearLayout 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical"> 

    <TextView 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:gravity="center_horizontal" 
     android:padding="30dp" 
     android:text="@string/toolbar_title_date_of_birth" 
     android:textAppearance="@style/TextAppearance.AppCompat.Large" /> 

    <DatePicker 
     android:id="@+id/onboard_birth_date_picker" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:calendarViewShown="false" 
     android:day="@={vm.datePicker}" 
     android:month="@={vm.monthPicker}" 
     android:solidColor="@color/grayMedium" 
     android:spinnersShown="true" 
     android:year="@={vm.yearPicker}" /> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:hint="test" 
     android:text="@{vm.dobSelected}" 
     android:visibility="visible"/> 

</LinearLayout> 

Answer 1

OnDateChanged is not called in Date picker Android lollipop

添加這，並覆蓋配置，日曆UI現在是微調式的和有約束力的作品

android:datePickerMode="spinner"