Gradle Error in Android: No signature of method: build_*.android() — how to fix?

Encountered "No signature of method: build_*.android()"? You are not alone

If you've ever opened Android Studio, made changes to the build.gradle.kts file, and received a mysterious red error ERROR: No signature of method: build_ap86oam3dut3pxce3x49rdtma.android() — welcome to the club. This Gradle issue is one of the most popular on Stack Overflow (thousands of views!), and it can throw even an experienced developer off balance.

The good news: the error almost always has the same cause and can be fixed in a couple of minutes. In this article, we'll break it down using Kotlin DSL (i.e., build.gradle.kts), show why it occurs, and provide a step-by-step fix. Let's go!

What does this error actually mean?

Gradle is a build system that reads build.gradle (Groovy) or build.gradle.kts (Kotlin) scripts. When you see No signature of method: build_*.android(), it means Gradle cannot find the android { ... } function in the context of the root project.

Simply put: you are trying to configure Android-specific parameters (compileSdk, buildTypes, defaultConfig) in a script that is not an application or library module. This usually happens in the root build.gradle.kts, which should only contain settings for all projects (plugins, repositories), not Android configuration.

Typical scenario (Kotlin DSL example)

Imagine you open the root build.gradle.kts file and write something like:

// ❌ Incorrect code in root build.gradle.kts\nandroid {\n    compileSdk = 34\n    defaultConfig {\n        minSdk = 24\n    }\n}\n

After syncing Gradle, you get that error. Why? Because the root script doesn't know about Android — it is responsible for global configuration, not a specific module.

Step-by-step fix for the error

Let's figure out how to properly structure build files in a Kotlin project. Just two steps.

Step 1: Check which file you are editing

Open the Project panel in Android Studio (usually on the left). Find two files:

\n
• build.gradle.kts (root, located in the project root)
\n
• app/build.gradle.kts (the app module file)
\n

The error occurs if you accidentally placed the android { ... } block in the root file. Make sure you are working with app/build.gradle.kts.

Step 2: Move the code to the correct file (if needed)

If you find the android block in the root build.gradle.kts — cut it and paste it into app/build.gradle.kts. Here is what the correct version for the app module should look like:

// ✅ Correct app/build.gradle.kts\nplugins {\n    id("com.android.application")\n    id("org.jetbrains.kotlin.android")\n}\n\nandroid {\n    namespace = "com.example.myapp"\n    compileSdk = 34\n\n    defaultConfig {\n        applicationId = "com.example.myapp"\n        minSdk = 24\n        targetSdk = 34\n        versionCode = 1\n        versionName = "1.0"\n    }\n\n    buildTypes {\n        release {\n            isMinifyEnabled = false\n            proguardFiles(\n                getDefaultProguardFile("proguard-android-optimize.txt"),\n                "proguard-rules.pro"\n            )\n        }\n    }\n\n    compileOptions {\n        sourceCompatibility = JavaVersion.VERSION_1_8\n        targetCompatibility = JavaVersion.VERSION_1_8\n    }\n\n    kotlinOptions {\n        jvmTarget = "1.8"\n    }\n}\n\ndependencies {\n    implementation("androidx.core:core-ktx:1.12.0")\n    implementation("androidx.appcompat:appcompat:1.6.1")\n    // ... remaining dependencies\n}\n

And the root build.gra