Fixing 'Configuration with name 'default' not found' Error in Android Studio

Problem Description

When integrating the Volley library in Android Studio using the Gradle system, users may encounter the error message: "Configuration with name 'default' not found". This error typically occurs when attempting to sync the project.

Error Causes

The primary cause of this error is that Gradle cannot find the specified module configuration. Based on the provided code, the issue may lie in incorrect build.gradle file settings or project structure for the library project.

Main Solution

Referencing the best answer, the solution is to place the Volley library folder in the project root and ensure all files are copied. Specific steps are as follows:

1. Create or move the library/volley folder in the project root directory.
2. Copy all source files of the Volley library to this folder.
3. Correctly include the module in the settings.gradle file, such as include ':library:volley'.
4. Add compile project(':library:volley') in the dependencies of app/build.gradle.
5. Sync the Gradle project.

This ensures that Gradle can correctly identify and configure the library module.

Supplementary Advice

Other answers provide additional insights. For example, Answer 1 suggests using git submodule commands to initialize submodules, which is effective when the library is a git submodule. Answer 3 points out that if the library folder is empty, submodules need to be checked out or files ensured to exist.

Code Example Analysis

In the original code, Volley/build.gradle uses older Android plugin and configurations. It is recommended to update to newer versions and ensure proper defaultConfig settings. For example, rewrite the build.gradle as follows:

apply plugin: 'com.android.library'

android {
    compileSdkVersion 30
    buildToolsVersion "30.0.3"

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 30
        versionCode 1
        versionName "1.0"
    }
}

This uses the modern Android Gradle plugin and specifies SDK versions.

Conclusion

By correctly configuring the project structure and Gradle files, this error can be resolved. Ensure library modules exist with correct paths, use appropriate Gradle configurations, and regularly sync projects to avoid similar issues.