我有一个应用程序模块,让我们说“测试”。 “测试”模块依赖于子模块 B。两者都启用数据绑定。在库模块 B 中,我使用数据绑定创建一个简单的活动,其目的是为了可重用性,例如:我可以创建一个基本登录屏幕并稍后在许多应用程序中使用它。下面是B包中的示例代码。
package com.test.packageb
open class MainActivity : AppCompatActivity() {
lateinit var binding : ActivityMainBinding
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = DataBindingUtil.setContentView(this, R.layout.activity_main)
}
}
然后在“测试”模块中,我可以简单地继承 MainActivity 类来进行自定义操作,如下所示:
class MainActivity1 : MainActivity(){
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
}
fun doSomething(){
binding.rootLayout.setBackgroundResource(R.color.colorPrimary)
}
}
但是,当我尝试运行“测试”应用程序时,出现此错误
错误:(17, 9) 无法访问类
'com.test.packageb.databinding.ActivityMainBinding'。检查你的模块
缺少或冲突的依赖项的类路径
错误:(17, 17)
未解决的参考:rootLayout
我错过了什么?还有什么需要实施的吗?
测试应用程序 build.gradle
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-kapt'
apply plugin: 'kotlin-android-extensions'
android {
compileSdkVersion 26
buildToolsVersion "26.0.1"
defaultConfig {
applicationId "com.test.testapplication"
minSdkVersion 15
targetSdkVersion 26
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
dataBinding{
enabled true
}
buildTypes {
debug {
}
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
kapt 'com.android.databinding:compiler:3.0.0-beta4'
implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation 'com.android.support:appcompat-v7:26.0.2'
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
testImplementation 'junit:junit:4.12'
androidTestImplementation('com.android.support.test.espresso:espresso-core:3.0.1', {
exclude group: 'com.android.support', module: 'support-annotations'
})
implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
implementation project(':packageb')
}
包B build.gradle
apply plugin: 'com.android.library'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'kotlin-kapt'
android {
compileSdkVersion 26
buildToolsVersion "26.0.1"
defaultConfig {
minSdkVersion 15
targetSdkVersion 26
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
dataBinding{
enabled true
}
buildTypes {
debug {
minifyEnabled false
}
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
kapt 'com.android.databinding:compiler:3.0.0-beta4'
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:26.0.2'
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
testImplementation 'junit:junit:4.12'
androidTestImplementation('com.android.support.test.espresso:espresso-core:3.0.1', {
exclude group: 'com.android.support', module: 'support-annotations'
})
implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
}