Android Studio 2.0 to Android Studio 3.0

本文转自 https://www.codexpedia.com/android/android-studio-2-0-to-android-studio-3-0/

When importing Android project that was using gradle 2+ and Android Studio 2+ into Android Studio 3.0, Android Studio 3.0 might run into this error.

Error:Could not initialize class org.jetbrains.kotlin.kapt.idea.KaptModelBuilderService

Replace following project gradle file which uses gradle 2.2.2

// Top-level build file where you can add configuration options common to all sub-projects/modules.buildscript {    repositories {        jcenter()    }    dependencies {        classpath 'com.android.tools.build:gradle:2.2.2'        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'        // NOTE: Do not place your application dependencies here; they belong        // in the individual module build.gradle files    }}allprojects {    repositories {        jcenter()    }}task clean(type: Delete) {    delete rootProject.buildDir}

with this project gradle file to use grade 3.0.0 to work with Android Studio 3.0+

// Top-level build file where you can add configuration options common to all sub-projects/modules.buildscript {    ext.kotlin_version = '1.1.60'    repositories {        google()        jcenter()    }    dependencies {        classpath 'com.android.tools.build:gradle:3.0.0'        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    }}allprojects {    repositories {        google()        jcenter()    }}task clean(type: Delete) {    delete rootProject.buildDir}

In the app gradle file, replace these plugins with

apply plugin: 'com.android.application'apply plugin: 'io.fabric'apply plugin: 'com.neenbedankt.android-apt'

these plugins.

apply plugin: 'com.android.application'apply plugin: 'kotlin-android'apply plugin: 'kotlin-android-extensions'apply plugin: 'kotlin-kapt'apply plugin: 'io.fabric'

In the dependencies tag in the app gradle file, replace compile toimplementation, replace testCompile with testImplementation, replaceandroidTestCompile with androidTestImplementation

For projects using dagger 2. replace

compile 'com.google.dagger:dagger:2.7'apt 'com.google.dagger:dagger-compiler:2.7'provided 'javax.annotation:jsr250-api:1.0'<pre>with<pre>implementation "com.google.dagger:dagger:2.11"implementation "com.google.dagger:dagger-android:2.11"kapt "com.google.dagger:dagger-compiler:2.11"

Now you will probably get this error if you haven’t upgraded the gradle library in the gradle-wrapper.properties file.
Could not find method google() for arguments [] on repository container.

So, let’s replace this line in the gradle-wrapper.properties

distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip

with this line

distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip

Then do a clean and rebuild, everything should work now.