Caused by: java.lang.IllegalArgumentException: couldn't make a guess for com.example.example.databinding.ContentClassApplicationMyClass1Binding

Question

I'm getting this error in android after updating the android studio from 3.0 to 3.1 and Gradle from 3.1 to 4.4.

How can I fix it?

It's working properly with Gradle 3.1 and android studio 3.0.

How can I get it to work?

Gradle app:

buildscript {
    repositories {
        maven { url 'https://maven.fabric.io/public' }
    }

    dependencies {
        classpath 'io.fabric.tools:gradle:1.+'

    }
}
apply plugin: 'com.android.application'
apply plugin: 'io.fabric'

repositories {

    mavenCentral()
    google()
    maven { url 'https://maven.fabric.io/public' }
}


android {
    compileSdkVersion 27

    dataBinding {
        enabled = true
    }

    defaultConfig {
        applicationId "com.example.example"
        minSdkVersion 22
        targetSdkVersion 23
        versionCode 13
        versionName "1.13"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        vectorDrawables.useSupportLibrary = true

        multiDexEnabled true
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }




    packagingOptions {
        exclude 'META-INF/DEPENDENCIES'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/license.txt'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/NOTICE.txt'
        exclude 'META-INF/notice.txt'
        exclude 'META-INF/ASL2.0'
    }


}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'com.android.support:appcompat-v7:27.0.2'

    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    implementation 'com.android.support:design:27.0.2'
    implementation 'com.google.firebase:firebase-messaging:11.8.0'
    implementation 'com.google.firebase:firebase-crash:11.8.0'
    implementation 'com.google.firebase:firebase-core:11.8.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
    compile 'com.amazonaws:aws-android-sdk-cognitoidentityprovider:2.6.8'
    compile 'com.squareup.retrofit2:retrofit:2.2.0'
    compile 'com.squareup.retrofit2:converter-gson:2.2.0'
    compile 'com.amazonaws:aws-android-sdk-core:2.6.8'
    compile 'com.amazonaws:aws-android-sdk-s3:2.6.8'
    compile 'com.amazonaws:aws-android-sdk-ddb:2.6.8'
    compile 'com.github.twinkle942910:monthyearpicker:0.0.1'
    compile('com.crashlytics.sdk.android:crashlytics:2.9.0@aar') {
        transitive = true;
    }
    compile 'com.google.android.gms:play-services-location:11.8.0'
    compile 'com.zsoltsafrany:needle:1.0.0'
    implementation 'com.android.support:cardview-v7:27.0.2'
    compile 'com.white:progressview:1.0.1'
    compile 'br.com.simplepass:loading-button-android:1.8.1'
    implementation files('/libs/android-sdk-0.1.0.jar')
    compile 'com.android.support:support-v4:27.0.2'

    compile 'com.clevertap.android:clevertap-android-sdk:3.1.8'


    compile 'testfairy:testfairy-android-sdk:1.+@aar'


    implementation 'com.github.bumptech.glide:glide:4.6.1'
    annotationProcessor 'com.github.bumptech.glide:compiler:4.6.1'
}




apply plugin: 'com.google.gms.google-services'

Gradle-Project:

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {

    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.2.31"

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
        classpath 'com.google.gms:google-services:3.1.0'
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

Gradle-wrapper.Properties:

distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip

Gradle.properties

org.gradle.jvmargs=-Xmx1536m
android.databinding.enableV2=true

Layout.xml

<?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">

    <android.support.constraint.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/white"
        android:padding="4dp"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        tools:context=".Class_application_MyClass1"
        tools:showIn="@layout/activity_class_application_myclass_1">


        <ScrollView
            android:id="@+id/scrollView2"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginBottom="60dip"
            android:layout_marginTop="20dip"
            android:padding="10dp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent">


            <android.support.v7.widget.CardView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                app:cardUseCompatPadding="true">

                <LinearLayout

                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:focusableInTouchMode="true"
                    android:orientation="vertical"
                    android:padding="25dp">


                    <android.support.design.widget.TextInputLayout

                        android:id="@+id/name_TextInputLayout"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_marginBottom="25dp">

                        <android.support.design.widget.TextInputEditText
                            android:id="@+id/name"
                            android:layout_width="match_parent"

                            android:layout_height="wrap_content"
                            android:drawablePadding="10dp"
                            android:hint="Name"
                            android:imeOptions="actionNext"
                            android:singleLine="true"
                            android:text=""
                            android:textSize="13sp" />

                    </android.support.design.widget.TextInputLayout>

                    <android.support.design.widget.TextInputLayout

                        android:id="@+id/number_TextInputLayout"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:layout_marginBottom="25dp">

                        <android.support.design.widget.TextInputEditText
                            android:id="@+id/number"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:drawablePadding="10dp"
                            android:hint="number"
                            android:inputType="textCapCharacters"
                            android:maxLength="10"
                            android:text=""
                            android:textAllCaps="true"
                            android:textSize="13sp" />

                    </android.support.design.widget.TextInputLayout>

                    <android.support.design.widget.TextInputLayout

                        android:id="@+id/classnumber_TextInputLayout"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_marginBottom="25dp">

                        <android.support.design.widget.TextInputEditText
                            android:id="@+id/class_number"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:drawablePadding="10dp"
                            android:hint="class"
                            android:imeOptions="actionNext"
                            android:inputType="textCapCharacters"
                            android:maxLength="15"
                            android:singleLine="true"
                            android:text=""
                            android:textSize="12sp" />
                    </android.support.design.widget.TextInputLayout>


                </LinearLayout>

            </android.support.v7.widget.CardView>

        </ScrollView>


    </android.support.constraint.ConstraintLayout>
</layout>

Activity.xml

<?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">

    <android.support.design.widget.CoordinatorLayout
        android:id="@+id/top_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".Class_application_MyClass1">

        <android.support.design.widget.AppBarLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:theme="@style/AppTheme.AppBarOverlay">

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                android:background="@color/fundscorner_blue"
                app:popupTheme="@style/AppTheme.PopupOverlay" />

            <android.support.constraint.ConstraintLayout
                android:id="@+id/linearLayout3"
                android:layout_width="fill_parent"
                android:layout_height="20dp"
                android:background="@color/white"
                app:layout_anchor="@+id/content_class_application_myclass_1"
                app:layout_anchorGravity="top|center">

                <com.white.progressview.HorizontalProgressView
                    android:id="@+id/progress100"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:padding="10dp"
                    android:progress="25"
                    app:progressReachColor="@color/colorPrimary"
                    app:progressTextColor="@color/colorPrimary"
                    app:progressTextVisible="false"
                    android:minHeight="20dip"
                    android:maxHeight="20dip"

                    />
            </android.support.constraint.ConstraintLayout>

        </android.support.design.widget.AppBarLayout>


        <include
            android:id="@+id/content_class_application_myclass_1"
            layout="@layout/content_class_application_myclass_1"/>

        <LinearLayout
            app:layout_anchor="@+id/content_class_application_myclass_1"
            app:layout_anchorGravity="bottom|center"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <Button
                android:background="@drawable/ripple"
                style="?borderlessButtonStyle"
                android:id="@+id/button_stage1"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:backgroundTint="@color/fundscorner_blue"
                android:text="Next"
                android:textColor="@color/white"
                />

        </LinearLayout>


    </android.support.design.widget.CoordinatorLayout>
</layout>

In JAVA file:

    ActivityClassApplicationMyClass1Binding binding;

        binding = DataBindingUtil.setContentView(this, R.layout.activity_class_application_myclass_1);



binding.name.settext("Name");

Answer 1

Its because of you class name or package name which use databinding. These class( which use databinding) have to start with capital word and packages start with lowercase.

Answer 2

As others have suggested, package names must start with a lowercase letter. My problem was that it started with an underscore "_" which was not allowed as well.

Answer 3

The reason for this error is, as Mehdi already stated in his answer, the capitalization in the Java package name of the binding and variable classes.

When further examining the logs, you can see that the error gets thrown at ClassName.bestGuess(String). The reason is that the package name of your bound classes, aka the ones in the <variable> field in your layout, contain uppercase characters in their package name. This causes the method to not be able to separate the Class name from the package name, and it throws an error.
[to be honest, that's a rather poor behavior, but probably no better way exists (yet)]

The same is true for the generated binding class, it also needs to be in a package that doesn't have any uppercase letters in it. As it uses your app package name by default, you have to change the java package name by adding the class property to the <data> field in your layout (Read more here).

Example:

<layout xmlns:app="http://schemas.android.com/apk/res-auto">
    <data class="com.example.ExampleDataBinding">
        <variable
            name="example"
            type="com.example.ExampleClass" />
    </data>
</layout>

Answer 4

The Binding class name seems to be wrong. Can you try changing it from ActivityClassApplicationMyClass1Binding to ActivityClassApplicationMyclass1Binding