问题
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");
回答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.
回答2:
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>
回答3:
The Binding class name seems to be wrong. Can you try changing it from ActivityClassApplicationMyClass1Binding to ActivityClassApplicationMyclass1Binding
回答4:
As others have suggested, package names must be begin with a lowercase letter. My problem was it started with an underscore "_" which is not allowed as well.
来源：https://stackoverflow.com/questions/49528437/caused-by-java-lang-illegalargumentexception-couldnt-make-a-guess-for-com-exa