Gradle kotlin-dsl 配置不起作用，无法识别 android 扩展功能

Question

I´m trying to configure my gradle setup with kotlin-dsl. My project gradle looks like this:

buildscript {
    repositories {
        google()
        jcenter()
    }

dependencies {
        classpath("com.android.tools.build:gradle:3.3.2")
        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.21")
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

and my app-level gradle:

plugins {
    id("com.android.application")
    id("kotlin-android")
}

android {  // marked red

}

Both filenames are build.gradle.kts. Gradle version is 5.2.1. I have the problem that the android {} part in the app-gradle file is not recognized by the IDE, I´m not able to configure things like compileSdkVersion etc. One more time I´m trying to migrate a project to kotlin-dsl and once more, nothing but failing and frustration. No idea why this is never working and always let me keep the old way. What am I doing wrong, why isn´t that working?

Answer 1

I faced the same thing as the android tag view in red. How I resolved my error, I just rebuild the project from Build option. (Build -> Rebuild Project) and I see that progruardFiles line is not as per guideline like all strings must be in double-quotes. I replace that with

proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")

After that again I rebuild the project and Gradle suggests me that "Add Dependiences in your project", after a click on that the issue is resolved.

Here is my module-level Gradle

plugins {
    id("com.android.application")
    kotlin("android")
    kotlin("android.extensions")
    kotlin("kapt")
}
android {
    compileSdkVersion(29)
    defaultConfig {
        applicationId = "com.example.app"
        minSdkVersion(21)
        targetSdkVersion(29)
        versionCode = 1
        versionName = "1.0"
        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
}
    buildTypes {
        getByName("release") {
            isMinifyEnabled = false
            proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")}
}
}

dependencies {
implementation(fileTree(mapOf("dir" to "libs", "include" tolistOf("*.jar"))))
implementation ("org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.3.41")
implementation ("androidx.appcompat:appcompat:1.0.2")
implementation ("androidx.core:core-ktx:1.0.2")
implementation ("androidx.constraintlayout:constraintlayout:1.1.3")
testImplementation ("junit:junit:4.12")
androidTestImplementation ("androidx.test:runner:1.2.0")
androidTestImplementation ("androidx.test.espresso:espresso-core:3.2.0")
}

Answer 2

I also got the same problem, after upgrading kotlin version from 1.3.21 to 1.3.71 and also change the com.android.tools.build:gradle version from 3.3.2 to 3.5.3

Maybe this will help you to solve the error.

Answer 3

Go to step by step

1. Update to Gradle Wrapper 5.0 or higher

2. Rename root -> settings.gradle to root -> settings.gradle.kts and in file

   include ':app' // before

   include(":app") // after

3. Rename root -> build.gradle to root -> build.gradle.kts and same changes as you do in that file

   buildscript {

    repositories { jcenter() google() } dependencies { classpath("com.android.tools.build:gradle:3.3.1") classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.11") } } allprojects { repositories { jcenter() google() } } tasks { val clean by registering(Delete::class) { delete(buildDir) } }

4. Same Rename app -> build.gradle to app -> build.gradle.kts and same changes as you do in that file

Answer 4

After 4 hours of wasting my time, finally, I solved these issues.

1. Find gradlew in your project root folder.
2. Right click on it, then open in -> terminal .
3. Write ./gradlew tasks command and enter.
4. If showing any error in your build.gradle file then fix it and rerun ./gradlew tasks command until all errors are solved and you can see BUILD SUCCESSFUL .
5. Now sync your gradle file.

After syncing is completed, all extension functions will be recognized by android studio and red marks will be vanished.