Kann nicht eine einfache TextView mit Android Data Binding

Question

OK, ich habe endlich meine Android Data Binding Code kompilieren. Nun, es funktioniert nicht so, wie ich es erwarte. Wenn ich setCurrentShopperInfo() von meinem Activity anrufen, aktualisieren meine TextView (s) nicht mit den String s Werten, die ich einstelle.

HINWEIS: Ich versuchte es auch mit ObservableField (s), das gleiche Ergebnis.

Es HAS etwas zu sein, ich bin nicht hier zu verstehen:

LAYOUT:

<data> 
     <variable name="currentShopperViewModel" type="ts.kiosk.app.checkout.viewmodels.CurrentShopperViewModel" /> 
     <import type="android.view.View" /> 
    </data> 


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

      <RelativeLayout 
       android:id="@+id/checkout_titlebar" 
       android:layout_width="match_parent" 
       android:layout_height="@dimen/app_header_height" 
       android:layout_alignParentTop="true" 
       android:background="@color/header_bkgrd"> 
       <ImageView 
        android:id="@+id/img_ts_logo" 
        android:layout_width="@dimen/app_icon_width" 
        android:layout_height="wrap_content" 
        android:adjustViewBounds="true" 
        android:scaleType="fitCenter" 
        android:layout_centerVertical="true" 
        android:layout_marginLeft="@dimen/app_icon_margin" 
        android:layout_marginRight="@dimen/app_icon_margin" 
        android:src="@drawable/touchsides_logo_notext"/> 
       <TextView 
        android:id="@+id/text_appname" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:text="@string/title_checkout" 
        android:layout_toRightOf="@+id/img_ts_logo" 
        android:layout_centerVertical="true" 
        style="@style/screenTitle"/> 

       <LinearLayout 
        android:visibility="visible" 
        android:layout_width="match_parent" 
        android:layout_height="match_parent" 
        android:orientation="horizontal" 
        android:layout_toRightOf="@+id/text_appname" 
        android:layout_toLeftOf="@+id/img_settings_menu" 
        android:paddingRight="20dip" 
        android:paddingLeft="20dip" 
        android:gravity="center_horizontal"> 
        <TextView 
         android:layout_width="wrap_content" 
         android:layout_height="match_parent" 
         android:text="@{currentShopperViewModel.textShopperInfoName}" 
         style="@style/previous_transaction_titlebar"></TextView> 
        <TextView 
         android:layout_width="wrap_content" 
         android:layout_height="match_parent" 
         android:text="@{currentShopperViewModel.textShopperInfoCashback}" 
         style="@style/previous_transaction_titlebar_cashback" 
         android:layout_marginLeft="20dip"></TextView> 
        <TextView 
         android:layout_width="wrap_content" 
         android:layout_height="match_parent" 
         android:text="@{currentShopperViewModel.textShopperInfoPoints}" 
         style="@style/previous_transaction_titlebar_points" 
         android:layout_marginLeft="20dip"></TextView> 
       </LinearLayout> 

ACTIVITY:

mCurentShopperViewModel = new CurrentShopperViewModel(this); 
     final ActivityCheckoutNewBinding binding = DataBindingUtil.setContentView(this, R.layout.activity_checkout_new); 
     binding.setCurrentShopperViewModel(mCurentShopperViewModel); 

VIEW MODELL:

public class CurrentShopperViewModel extends BaseObservable{ 

    Context mCtx; 

    //public ObservableBoolean showShopperInfo = new ObservableBoolean(); 


    private String textShopperInfoName; 
    private String textShopperInfoCashback; 
    private String textShopperInfoPoints; 


    @Bindable 
    public String getTextShopperInfoName() { 
     return this.textShopperInfoName; 
    } 
    @Bindable 
    public String getTextShopperInfoCashback() { 
     return this.textShopperInfoCashback; 
    } 
    @Bindable 
    public String getTextShopperInfoPoints() { 
     return this.textShopperInfoPoints; 
    } 


    public void setTextShopperInfoName(String name) { 
     this.textShopperInfoName = name; 
     notifyPropertyChanged(BR.textShopperInfoName); 
    } 
    public void setTextShopperInfoCashback(String cashback) { 
     this.textShopperInfoCashback = cashback; 
     notifyPropertyChanged(BR.textShopperInfoCashback); 
    } 
    public void setTextShopperInfoPoints(String points) { 
     this.textShopperInfoPoints = points; 
     notifyPropertyChanged(BR.textShopperInfoPoints); 
    } 


    public CurrentShopperViewModel(Context context) { 
     mCtx = context; 
    } 


    public void setCurrentShopperInfo(CardStructure cardStructure) { 

     //show(true); 

     int[] card = CardUtil.getInstance().getBalance(cardStructure); 

     setTextShopperInfoName(String.format("%s %s", mCtx.getResources().getString(R.string.item_wallet_desposit) , Formatter.formatCurrency(CheckoutApplication.LOCALE,card[0]))); 
     setTextShopperInfoCashback( String.format("%s %s", mCtx.getResources().getString(R.string.item_wallet_desposit) , Formatter.formatCurrency(CheckoutApplication.LOCALE,card[0])) ); 
     setTextShopperInfoPoints (String.format("%s %s", mCtx.getResources().getString(R.string.item_loyalty_points),card[1])); 
    } 

Gradle:

buildscript { 
    repositories { 
     mavenCentral() 
     maven { url 'http://download.crashlytics.com/maven' } 
     maven { url 'https://oss.sonatype.org/content/repositories/ksoap2-android-releases/' } 
    } 

    dependencies { 
     classpath 'com.crashlytics.tools.gradle:crashlytics-gradle:1.+' 
     classpath 'com.google.code.ksoap2-android:ksoap2-android:3.1.1' 
    } 
} 



apply plugin: 'com.android.application' 
apply plugin: 'crashlytics' 


repositories { 
    maven { url 'http://download.crashlytics.com/maven' } 
    maven { url 'https://oss.sonatype.org/content/repositories/ksoap2-android-releases/' } 
} 

android { 
    compileSdkVersion 20 
    buildToolsVersion "23.0.3" 

    defaultConfig { 
     applicationId "ts.kiosk.app.checkout" 
     minSdkVersion 16 
     targetSdkVersion 16 
     versionCode 2 
     versionName "0.0.2.258" 
    } 
    buildTypes { 
     release { 
      minifyEnabled false 
      proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 
     } 
    } 

    lintOptions { 
     abortOnError false 
    } 


    sourceSets { 
     main { 
      assets.srcDirs = ['src/main/assets', 'src/main/assets/'] 
     } 
    } 


    dataBinding{ 
     enabled = true 
    } 
} 



dependencies { 

    compile fileTree(include: ['*.jar'], dir: 'libs') 
    compile 'com.android.support:support-v4:20.0.0' 
    compile 'com.crashlytics.android:crashlytics:1.+' 
    compile 'net.danlew:android.joda:2.7.2' 
    compile 'com.google.code.ksoap2-android:ksoap2-android:3.1.1' 
    compile 'com.squareup.retrofit:retrofit:1.6.1' 
    compile 'com.squareup.okhttp:okhttp-urlconnection:2.0.0' 
    //compile 'com.squareup.okhttp:okhttp:2.0.0' 

    // Robolectric 
    testCompile 'junit:junit:4.12' 
    testCompile 'org.hamcrest:hamcrest-library:1.3' 
    testCompile 'org.apache.maven:maven-ant-tasks:2.1.3' // fixes issue on linux/mac 
    testCompile 'org.robolectric:robolectric:3.0' 

    compile project(':asterixmodule') 
    compile project(':servicemodule') 
    compile project(':sdfclient') 


} 

android { 

    packagingOptions { 
     exclude 'META-INF/maven/com.squareup.okhttp/okhttp/pom.properties' 
     exclude 'META-INF/maven/com.squareup.okhttp/okhttp/pom.xml' 
    } 
} 

Logcat:

nicht sicher, was, was hier von Bedeutung sein würde, aber ich sehe das, nachdem ich setCurrentShopperInfo() von meinem Activity nennen:

04-12 21:31:30.252 866-866/ts.kiosk.app.checkout E/java.lang.StackTraceElement: InterfaceError 

PROPERTY NOTIFY GEÄNDERT Debugging

Ich trat in die notifyPropertyChanged() Methode und mCallbacks Größe ist 0 --- ist das korrekt?

/** 
    * Notifies listeners that a specific property has changed. The getter for the property 
    * that changes should be marked with {@link Bindable} to generate a field in 
    * <code>BR</code> to be used as <code>fieldId</code>. 
    * 
    * @param fieldId The generated BR id for the Bindable field. 
    */ 
    public void notifyPropertyChanged(int fieldId) { 
     if (mCallbacks != null) { 
      mCallbacks.notifyCallbacks(this, fieldId, null); 
     } 
    } 

Ich habe auch versucht die ObservableField Art und Weise der Einstellungsdaten verbindlich, wenn letztlich das nennt man:

public synchronized void notifyChange() { 
     if (mCallbacks != null) { 
      mCallbacks.notifyCallbacks(this, 0, null); 
     } 
    } 

und mCallbacks ist wieder null und ich denke, dass ist ein Thema, aber nicht wissen, wie um es zu debuggen.

Answer 1

Mein Problem war, dass in OnCreate() Ich rief setContentView() zweimal ... einmal für die Datenbindung und dann wieder auf die alte Weise (was anscheinend die Daten überschrieben Bindung):

DataBindingUtil.setContentView(this, R.layout.activity) 

//other code here 

setContentView(R.layout.activity);