Android Studio工具问题(逐步梳理中~)

Android Studio使用中配合Gradle构建工具，由于Gradle的版本之前差异很大，因此有是在修改project的文件过程中会遇到各种问题，这里记录了我在开发过程中逐渐梳理的遇到的问题。

Project结构：

Project

? | ---- app

? | ---- phase1

? | ---- base

app module 是入口模块，目前是空壳。
phase1 module是第一阶段测试完成的模块，包含业务功能，UI交互等。
base module是基本公共组件，包含公共库的配置等。

找不到DataBindingMapperImpl

DataBinding 是在AS过程中，apt会产生一些中间类，但也需要一些依赖库的支持。这里遇到了一个无法找到DataBindingMapperImpl类的提示。

...
Caused by: java.lang.ClassNotFoundException: Didn't find class "androidx.databinding.DataBinderMapperImpl" on path: DexPathList[[zip file "/data/app/进程名-iS9nPJeG1xdw4qsgYI0vmg==/base.apk"],nativeLibraryDirectories=[/data/app/进程名-iS9nPJeG1xdw4qsgYI0vmg==/lib/arm64, /system/lib64, /product/lib64]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
        at androidx.databinding.DataBindingUtil.<clinit>(DataBindingUtil.java:32) 
        at androidx.databinding.DataBindingUtil.setContentView(DataBindingUtil.java:284) 
        at com.sanren1024.android.app1.ui.activity.MainActivity.onCreate(MainActivity.kt:74) 
        at android.app.Activity.performCreate(Activity.java:7458) 
        at android.app.Activity.performCreate(Activity.java:7448) 
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1286) 
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3533) 
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3738) 
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:86) 
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2226) 
        at android.os.Handler.dispatchMessage(Handler.java:112) 
        at android.os.Looper.loop(Looper.java:216) 
        at android.app.ActivityThread.main(ActivityThread.java:7779) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:990) 
...

当请配置中，databinding配置在phase1模块的build.gradle文件中。开始运行后，遇到了上述配置。

phase1的build.gradle基本配置。**

//...
android {
    compileSdk 30
    buildToolsVersion '30.0.3'
    defaultConfig {
        minSdk 26
        targetSdk 30

        multiDexEnabled true

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        consumerProguardFiles "consumer-rules.pro"
    }

    buildFeatures {
        dataBinding = true
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_11
        targetCompatibility JavaVersion.VERSION_11
    }
    kotlinOptions {
        jvmTarget = '11'
    }
}
dependencies {

    kapt "androidx.room:room-compiler:2.3.0"

    api project(':rxbase')

    // ...
}

// ...

base的build.gradle依赖配置。**

// ...
dependencies {

    api 'androidx.core:core-ktx:1.5.0'
    api 'androidx.appcompat:appcompat:1.3.0'
    api 'com.google.android.material:material:1.4.0'
    api 'androidx.constraintlayout:constraintlayout:2.0.4'
    api 'androidx.legacy:legacy-support-v4:1.0.0'

    api "androidx.room:room-ktx:2.3.0"
    api "androidx.room:room-runtime:2.3.0"

    api 'org.slf4j:slf4j-api:1.7.25'
    api 'com.github.tony19:logback-android:2.0.0'

    api 'androidx.work:work-runtime-ktx:2.5.0'

    api "androidx.multidex:multidex:2.0.1"
    api "androidx.preference:preference-ktx:1.1.0"
    api "androidx.preference:preference:1.1.0"

//    testImplementation 'junit:junit:4.13.2'
//    androidTestImplementation 'com.android.support.test:runner:1.0.2'
//    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}