Android Databinding xml duplicate attribute

Question

I recently started developing on an android application which uses databinding. My problem now is that I can't run the app because of this error:

Error:(10) Error parsing XML: duplicate attribute 

The error occurs in every file using databinding (I am using fragments). I googled for like 3 hours now and I can't find the solution.

build.gradle:

apply plugin: 'com.android.application'  android {     dexOptions {         preDexLibraries = false         javaMaxHeapSize "2g"     }     compileSdkVersion 23     buildToolsVersion "23.0.3"     defaultConfig {         applicationId "at.blacktasty.schooltoolmobile"         minSdkVersion 15         targetSdkVersion 23         versionCode 1         versionName "1.0"         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"     }     buildTypes {         release {             minifyEnabled false             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'         }     }     dataBinding {         enabled = true     } }  dependencies {     compile fileTree(include: ['*.jar'], dir: 'libs')     androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {         exclude group: 'com.android.support', module: 'support-annotations'     })     compile files('libs/eneter-messaging-android-7.0.1.jar')     compile 'com.android.support:appcompat-v7:23.4.0'     compile 'com.android.support:design:23.4.0'     compile 'com.android.support:support-v4:23.4.0'     testCompile 'junit:junit:4.12' } 

fragment_tests.xml:

<layout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     tools:context="layout.tests">      <data>         <variable             name="deadline"             type="at.blacktasty.schooltoolmobile.viewmodel.STViewModel"/>     </data>      <LinearLayout         android:layout_width="match_parent"         android:layout_height="match_parent">         <ListView             android:layout_width="match_parent"             android:layout_height="match_parent"             android:id="@+id/list_tests"             android:entries="@{deadline.deadline}"/>     </LinearLayout> </layout> 

tests.java:

package layout;  import android.databinding.DataBindingUtil; import android.os.Bundle; import android.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup;  import at.blacktasty.schooltoolmobile.R; import at.blacktasty.schooltoolmobile.databinding.FragmentSyncBinding; import at.blacktasty.schooltoolmobile.databinding.FragmentTestsBinding; import at.blacktasty.schooltoolmobile.viewmodel.STViewModel;  /**  * A simple {@link Fragment} subclass.  * create an instance of this fragment.  */ public class tests extends Fragment {     private STViewModel stViewModel;      public tests() {         // Required empty public constructor     }      @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);     }      @Override     public View onCreateView(LayoutInflater inflater, ViewGroup container,                              Bundle savedInstanceState) {         stViewModel = new STViewModel();         FragmentTestsBinding binding = DataBindingUtil.inflate(                 inflater, R.layout.fragment_tests, container, false);         View view = binding.getRoot();         binding.setDeadline(stViewModel);           return view;     } } 

And the xml file where the error occurs (debug\layout\fragment_tests.xml). layout_width and layout_height are marked as error:

    <LinearLayout         android:layout_width="match_parent"          android:layout_height="match_parent" android:tag="layout/fragment_tests_0" xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="layout.tests">     <ListView         android:layout_width="match_parent"         android:layout_height="match_parent"         android:id="@+id/list_tests"         android:tag="binding_1"               /> </LinearLayout> 

I really hope someone can help me out.

EDIT: Here the STViewModel class:

public class STViewModel extends BaseObservable {     private ObservableArrayList<Deadline> m_deadline = new ObservableArrayList<>();      @Bindable     public ObservableArrayList<Deadline> getDeadline(){         return m_deadline;     }      public void setDeadline(ObservableArrayList<Deadline> value){         m_deadline = value;         notifyPropertyChanged(BR.deadline);     } } 

Answer 1

I've just found out what the solution is. I just had to delete layout_width and layout_height from the <layout> definition.

<layout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" tools:context="layout.tests"> 

instead of

<layout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="layout.tests">