监听器绑定; 找不到Setter

我想实现监听器绑定 ，但是当我运行我的代码时，我得到以下错误：

Caused by: android.databinding.tool.util.LoggedErrorException: Found data binding errors. ****/ data binding error ****msg:Cannot find the setter for attribute 'android:onClick' with parameter type lambda on android.widget.Button. file:~/GithubBrowser/app/src/main/res/layout/loading_state.xml loc:30:31 - 30:52 ****\ data binding error **** 

这是有问题的布局文件：

 <?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"> <data> <import type="com.example.app.data.model.Resource"/> <import type="com.example.app.data.model.Status"/> <variable name="resource" type="Resource"/> <variable name="callback" type="com.example.app.ui.common.RetryCallback"/> </data> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical" android:gravity="center" android:padding="@dimen/default_margin"> <Button android:id="@+id/retry" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/retry" android:onClick="@{() -> callback.retry()}"/> </LinearLayout> </layout> 

这是布局中引用的RetryCallback接口：

 package com.example.app.ui.common interface RetryCallback { fun retry() } 

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编辑

顶级build.gradle ：

 buildscript { ext.android_tools_version = '3.0.0-alpha3' ext.kotlin_version = '1.1.2-5' repositories { maven { url 'https://maven.google.com' } jcenter() } dependencies { classpath "com.android.tools.build:gradle:$android_tools_version" classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" // NOTE: Do not place your application dependencies here; they belong // in the individual module build.gradle files } } ext { architecture_version = '1.0.0-alpha2' constraint_version = '1.0.2' dagger_version = '2.11' espresso_version = '2.2.2' glide_version = '3.7.0' junit_version = '4.12' mockito_version = '2.7.19' mock_server_version = '3.6.0' moshi_version = '1.5.0' retrofit_version = '2.2.0' support_version = '25.4.0' timber_version = '4.5.1' } allprojects { repositories { jcenter() mavenCentral() maven { url 'https://maven.google.com' } } } task clean(type: Delete) { delete rootProject.buildDir } 

和应用程序模块build.gradle ：

 apply plugin: 'com.android.application' apply plugin: 'kotlin-android' apply plugin: 'kotlin-kapt' android { compileSdkVersion 25 buildToolsVersion "25.0.3" defaultConfig { applicationId "com.example.app" minSdkVersion 16 targetSdkVersion 25 versionCode 1 versionName "1.0" testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" } buildTypes { debug { testCoverageEnabled !project.hasProperty('android.injected.invoked.from.ide') } release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } dataBinding { enabled = true } compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 } } kapt { generateStubs = true } dependencies { compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version" compile "com.android.support:appcompat-v7:$support_version" compile "com.android.support:cardview-v7:$support_version" compile "com.android.support:design:$support_version" compile "com.android.support:recyclerview-v7:$support_version" compile "com.android.support.constraint:constraint-layout:$constraint_version" compile "android.arch.lifecycle:extensions:$architecture_version" compile "android.arch.lifecycle:runtime:$architecture_version" compile "android.arch.persistence.room:runtime:$architecture_version" compile "com.google.dagger:dagger:$dagger_version" compile "com.google.dagger:dagger-android:$dagger_version" compile "com.google.dagger:dagger-android-support:$dagger_version" compile "com.squareup.moshi:moshi:$moshi_version" compile "com.squareup.retrofit2:retrofit:$retrofit_version" compile "com.squareup.retrofit2:converter-moshi:$retrofit_version" compile "com.github.bumptech.glide:glide:$glide_version" compile "com.jakewharton.timber:timber:$timber_version" kapt "com.android.databinding:compiler:$android_tools_version" kapt "com.google.dagger:dagger-android-processor:$dagger_version" kapt "com.google.dagger:dagger-compiler:$dagger_version" kapt "android.arch.persistence.room:compiler:$architecture_version" kapt "android.arch.lifecycle:compiler:$architecture_version" testCompile "junit:junit:$junit_version" testCompile "com.squareup.okhttp3:mockwebserver:$mock_server_version" testCompile ("android.arch.core:core-testing:$architecture_version", { exclude group: 'com.android.support', module: 'support-compat' exclude group: 'com.android.support', module: 'support-annotations' exclude group: 'com.android.support', module: 'support-ccore-utils' }) androidTestCompile "com.android.support:appcompat-v7:$support_version" androidTestCompile "com.android.support:cardview-v7:$support_version" androidTestCompile "com.android.support:design:$support_version" androidTestCompile "com.android.support:recyclerview-v7:$support_version" androidTestCompile ("com.android.support.test.espresso:espresso-core:$espresso_version", { exclude group: 'com.android.support', module: 'support-annotations' exclude group: 'com.google.code.findbugs', module: 'jsr305' }) androidTestCompile ("com.android.support.test.espresso:espresso-contrib:$espresso_version", { exclude group: 'com.android.support', module: 'support-annotations' exclude group: 'com.google.code.findbugs', module: 'jsr305' }) androidTestCompile "org.mockito:mockito-android:$mockito_version" } 

Answer 1

我只是遇到了这个问题，我已经设法通过删除.idea，.gradle和gradle文件夹来解决它，让Android Studio从gradle文件重新创建整个项目。

Answer 2

只要重建项目。 这可能是因为你做了一些重构