資源NotFoundException上搜索欄數據綁定表達式

Question

我試圖使用lambda表達式的搜索欄onProgressChanged調用一個方法，但我得到這個異常：

android.content.res.Resources$NotFoundException: String resource ID #0x0 
    at android.content.res.Resources.getText(Resources.java:336) 
    at android.widget.TextView.setText(TextView.java:4465) 
    at br.com.caradviser.app.databinding.FragmentFilterBinding.executeBindings(FragmentFilterBinding.java:476) 
    at android.databinding.ViewDataBinding.executePendingBindings(ViewDataBinding.java:355) 
    at android.databinding.ViewDataBinding$6.run(ViewDataBinding.java:172) 
    at android.databinding.ViewDataBinding$5.onViewAttachedToWindow(ViewDataBinding.java:142) 
    at android.view.View.dispatchAttachedToWindow(View.java:14714) 
    at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2962) 
    at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2969) 
    at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2969) 
    at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2969) 
    at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2969) 
    at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2969) 
    at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2969) 
    at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2969) 
    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1599) 
    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1321) 
    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6708) 
    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:894) 
    at android.view.Choreographer.doCallbacks(Choreographer.java:696) 
    at android.view.Choreographer.doFrame(Choreographer.java:631) 
    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:880) 
    at android.os.Handler.handleCallback(Handler.java:815) 
    at android.os.Handler.dispatchMessage(Handler.java:104) 
    at android.os.Looper.loop(Looper.java:207) 
    at android.app.ActivityThread.main(ActivityThread.java:5728) 
    at java.lang.reflect.Method.invoke(Native Method) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679) 

這裏的佈局：

<?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:grid="http://schemas.android.com/apk/res-auto" 
    xmlns:tools="http://schemas.android.com/tools" 
    tools:context="br.com.app.fragments.FilterFragment"> 

    <data> 

     <variable 
      name="filter" 
      type="br.com.app.model.Filter"/> 

     <variable 
      name="presenter" 
      type="br.com.app.contract.FilterContract.Presenter" /> 
    </data> 

    <RelativeLayout 
     android:id="@+id/content_filter" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:paddingBottom="@dimen/activity_vertical_margin" 
     android:paddingLeft="@dimen/activity_horizontal_margin" 
     android:paddingRight="@dimen/activity_horizontal_margin" 
     android:paddingTop="@dimen/activity_vertical_margin" 
     app:layout_behavior="@string/appbar_scrolling_view_behavior" 
     tools:showIn="@layout/activity_filter"> 


<!-- 
Some widgets omitted for brevity 
--> 

    <TextView 
       android:id="@+id/textView3" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_alignParentLeft="true" 
       android:layout_alignParentStart="true" 
       android:layout_below="@+id/separator_2" 
       android:text="Nota Mínima" /> 

      <SeekBar 
       android:id="@+id/bar_min_rating" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_alignParentLeft="true" 
       android:layout_alignParentStart="true" 
       android:layout_below="@+id/textView3" 
       android:max="5" 
       android:progress="@={filter.minRating}" 
       android:onProgressChanged="@{(seekBar, progress, fromUser) -> presenter.minRatingChanged(seekBar)}" /> 

      <TextView 
       android:id="@+id/text_rating_value" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_alignParentLeft="true" 
       android:layout_alignParentStart="true" 
       android:layout_below="@+id/bar_min_rating" 
       android:text="@{filter.minRating}" 
       android:translationX="12dp" /> 

    </RelativeLayout> 
</layout> 

和碎片代碼：

public class FilterFragment extends Fragment 
     implements FilterContract.View { 

    private FragmentFilterBinding mViewDataBinding; 
    private FilterContract.Presenter mPresenter; 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 
     // Inflate the layout for this fragment 
     View view = inflater.inflate(R.layout.fragment_filter, container, false); 

     mViewDataBinding = FragmentFilterBinding.bind(view); 

     Filter model = new Filter(); 
     mViewDataBinding.setFilter(model); 

     return view; 
    } 

} 

主持人：

public class FilterPresenter implements FilterContract.Presenter { 

    private final FilterContract.View mView; 

    public FilterPresenter(FilterContract.View mView) { 
     this.mView = mView; 

     mView.setPresenter(this); 
    } 

    public void start() { 

    } 

    @Override 
    public void maxDistanceChanged(int position) { 

    } 

    @Override 
    public void minRatingChanged(SeekBar seekBar) { 
     Log.d("minRatingChanged", String.valueOf(seekBar.getProgress())); 
    } 
} 

我的代碼有什麼問題？

Answer 1

異常不是由SeekBar引起的綁定問題是android:text="@{filter.minRating}" 另外我看不到你在哪裏設置filter。

由於您沒有發佈您的br.com.app.model.Filter的代碼我猜minRating是一個整數。 所以綁定需要一個字符串資源，在你的情況下id爲0。

所以只需將minRating的類型更改爲String即可。