Namespace not specified. Please specify a namespace in the module's build.gradle file

Question

I keep getting an error when I tried to build my react-native app with npx expo run:android

* What went wrong:
Could not determine the dependencies of task ':app:compileDebugJavaWithJavac'.
> Could not resolve all dependencies for configuration ':app:debugRuntimeClasspath'.
   > A problem occurred configuring project ':react-native-webview'.
      > Could not create an instance of type com.android.build.api.variant.impl.LibraryVariantBuilderImpl.
         > Namespace not specified. Please specify a namespace in the module's build.gradle file like so:

           android {
               namespace 'com.example.namespace'
           }

However, in android/app/build.gradle

...
android {
    ndkVersion rootProject.ext.ndkVersion
    compileSdkVersion rootProject.ext.compileSdkVersion
    namespace 'com.wilburcoding.BirdSoundSearch'
...

There doesn't appear to be any answers online that have valid/working answers to this problem. It does appear this issue may have originated from react-native-webview. Is this an issue with the dependency or a gradle issue?

Vermouth

Answer 1

Newer versions of React Native will require a namespace be set in build.gradle files. To correct the issue, you should try bumping the dependency in question (in this case, react-native-webview) to a newer version which contains the namespace entry. You can also try removing namespace from android/app/build.gradle, as I don't believe it's strictly needed in React Native 71 or 72.

To learn more about why these changes have been made, take a look at this GitHub discussion: https://github.com/react-native-community/discussions-and-proposals/issues/671

Nymphet

Looks like that's the issue. Unfortunately, react-native-webview has yet to add the namespace so I added it manually. Seems to work now. – Vermouth

but in my case there's a lot of packages which needs package name to be removed from AndroidManifest.xml and namespace to be added in their respective build.gradle in node_modules. – Savagery

Answer 2

I was having the same issue here. Go to the list of graddle scripts in your android app. Locate the one that is giving you issue (in my case it was build.gradle (Module: react-native-maps)

Then open it and add your namespace there, under android.

...
android {
    ...
    namespace 'com.example.namespace'
...
}

Austral

Yup, basically what I had to do to solve the issue manually! – Vermouth

Answer 3

In my Flutter project, I was getting the same issue once I upgraded to compileSDK 34.

I upgraded the gradle version, kotlinVerion and I also specified namespace but I was still getting the issue, so what I did, I added the following into my build.gradle (project level).

   subprojects {
        afterEvaluate { project ->
            if (project.hasProperty('android')) {
                project.android {
                    if (namespace == null) {
                        namespace project.group
                    }

                 compileOptions {
                     sourceCompatibility JavaVersion.VERSION_17
                     targetCompatibility JavaVersion.VERSION_17
                    }
                 tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).configureEach {
                      kotlinOptions {
                          jvmTarget = "17"
                     }
                    }
                 java {
                     toolchain {
                         languageVersion = JavaLanguageVersion.of(17)
                      }
                  }
                    
                }
            }
        }
    }

you can update the dependencies in pubspec.yaml file but still, you may face this issue because not all the dependencies are upgraded, so this piece of code will force all to use the namespace. It's how my build.gradle looks like

import org.jetbrains.kotlin.gradle.tasks.KotlinCompile

buildscript {
    ext.kotlin_version = '1.9.22'
    repositories {
        google()
        mavenCentral()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:8.2.2'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

allprojects {
    repositories {
        google()
        mavenCentral()
    }
    subprojects {
        afterEvaluate { project ->
            if (project.hasProperty('android')) {
                project.android {
                    if (namespace == null) {
                        namespace project.group
                    }

                    compileOptions {
                        sourceCompatibility JavaVersion.VERSION_17
                        targetCompatibility JavaVersion.VERSION_17
                    }
                    tasks.withType(KotlinCompile).configureEach {
                        kotlinOptions {
                            jvmTarget = "17"
                        }
                    }
                    java {
                        toolchain {
                            languageVersion = JavaLanguageVersion.of(17)
                        }
                    }

                }
            }
        }
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

tasks.register("clean", Delete) {
    delete rootProject.buildDir
}

Clank

Answer 4

This error happens when you update the gradle versions. After adding this code , i have resolved the issues . Add this file in Android-->>build.gradle file

rootProject.buildDir = "../build"
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}

// The below script
subprojects {
    afterEvaluate { project ->
        if (project.hasProperty('android')) {
            project.android {
                if (namespace == null) {
                    namespace project.group
                }
            }
        }
    }
}
// till here
subprojects {
    project.evaluationDependsOn(':app')
}

Murat

Answer 5

I got the same issue in flutter project then i have removed the package name declared initially in androidmanifest.xml file, also cleared the flutter cache and flutter pub cache then after flutter clean and flutter pub get i got this error solved.

Shortage

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