How to copy a project in Android Studio: a complete guide

Mobile application development is a process that requires constant experimentation and testing hypotheses. Often, a developer is faced with the need to create an exact copy of an existing project in order to implement new functionality without risking the stability of the main code base. Clone a project is standard industry practice to isolate experiments and maintain the purity of the main application architecture.

In the environment Android Studio There are several proven ways to accomplish this task, each of which has its own characteristics and use cases. You can use built-in import tools, file system manipulation, or version control systems. The specific method you choose depends on where the source code is located and how deeply you plan to modify the new version of the application.

Copying files incorrectly can lead to dependency conflicts, compilation errors, or problems with the application's unique identifier. In this article we will analyze in detail all the available methods, paying special attention to the technical nuances of setup Gradle and folder structure. This will allow you to avoid common mistakes and save time on setting up your environment.

Using the built-in Import Project function

The most reliable and recommended way to create a copy of a project is to use the standard tools of the development environment. This method ensures that all configuration files are processed correctly and internal links are updated automatically. When you select the import option, Android Studio autonomously checks the compatibility of Gradle versions and plugins.

To get started, launch the development environment and on the welcome screen select the item Import Project (or Open in new versions). You will be prompted to specify the path to the folder where the source project resides. The system will analyze the directory structure and offer to select a file settings.gradle or the root folder of the project.

⚠️ Attention: When importing a project from another computer, make sure that you have a compatible version of the JDK installed. Mismatch between Java versions often leads to Gradle synchronization errors.

After selecting a folder, the process of indexing and downloading dependencies will begin. Gradle Daemon will begin downloading the necessary libraries specified in the assembly files. This stage may take some time depending on the speed of your Internet connection and the size of the project.

It is important to understand that the import creates a new entry in the list of recent projects, but does not necessarily copy the files on disk unless you have moved the folder first. If the source is on external media, the IDE may work slower. It is recommended to first copy the entire project folder to local storage.

Manually copying through the file system

An alternative method involves working directly with operating system files. This approach gives you complete control over the process and is useful when you need to create multiple variations of the same application at the same time. You simply copy the project's root folder and give it a new name.

However, simply copying a folder .idea and .gradle may cause conflicts, since they contain cached data and unique path identifiers. Before opening the copied project in Android Studio it is strongly recommended to delete hidden system folders so that the environment generates them again.

Here is a list of directories that are best deleted before launching the copied project for the first time:

• 📁 .idea/ — contains the settings for a specific project instance in the IDE.
• 📁 .gradle/ — cache Gradle, which can store absolute paths.
• 📁 build/ —temporary compilation files that take up space.
• 📁 app/build/ —application module build artifacts.

After cleaning the folders, open the project through the menu File → Open. The system will re-create the configuration files based on your current system settings. This is especially useful when transferring a project between different operating systems, for example, from Windows to macOS.

When copying manually, a problem often arises with the paths in the file local.properties. This file does not go into version control, but is created locally. If the paths in it lead to non-existent directories on your computer, the project will not be able to build.

Setting up a unique Application ID

One ​​of the critical mistakes when cloning a project is forgetting to change Application ID. If you plan to install both applications (original and copy) on the same device at the same time, they must have different IDs. Otherwise, the new application will simply overwrite the old one.

To change the identifier, open the file build.gradle (Module: app). Find the block defaultConfig and change the parameter value applicationId. For example, if the original had ID com.example.myapp, the copy should be called com.example.myapp.clone or com.example.myapp.beta.

android {
defaultConfig {
applicationId"com.example.myapp.copy"
minSdkVersion 21
targetSdkVersion 34
versionCode 1
versionName"1.0"
}
}

In addition to the ID, it is often necessary to change the display name of the application in order to distinguish between icons on the desktop. To do this, open the file res/values/strings.xml and change the value of the line app_name. This will allow you to visually distinguish the test version from the production build.

It is also worth checking the application manifest AndroidManifest.xml. Some libraries or services (such as Firebase or Maps) may require unique configurations tied to a package. If you use Deep Linkstheir schemes will also need to be changed to avoid URL interception conflicts.

Working with dependencies and Gradle files

When moving a project to another computer or to a new folder, the versions of plugins and build tools may not match. The file build.gradle (Project level) contains declarations of Android and Kotlin plugin versions. If your IDE is newer or older than the original project, you may need to update these versions.

Pay attention to the file gradle-wrapper.propertieslocated in the folder gradle/wrapper. It determines which version of Gradle will be used for the build. If the version is too old, new features may not work; if it’s too new, compatibility errors with plugins may occur.

Component	Location	What is affected by
Gradle Wrapper	gradle/wrapper/gradle-wrapper.properties	Project builder version
Android Plugin	build.gradle (Project)	Integration with Android SDK
Kotlin Plugin	build.gradle (Project)	Kotlin language support
Compile SDK	build.gradle (Module: app)	Available Android APIs

Often, when copying a project, a synchronization error occurs due to the lack of repositories. Make sure that the necessary repositories are specified in the Gradle files, such as google, mavenCentral and jcenter (if you are using old libraries).

⚠️ Attention: The interface and structure of Gradle files may change with the release of new versions of Android Studio (for example, transition to Version Catalogs). Always check the syntax with the official documentation if you see a red underline.

What is Gradle Daemon?

Gradle Daemon is a background process that speeds up project building by maintaining state between runs. When frequently rebuilding projects, it is sometimes useful to stop it with a command ./gradlew --stop or through the IDE menu to reset the cache and free up memory.

If you use proprietary libraries or local modules (AAR/JAR files), make sure that the paths to them in the configuration dependencies are correct. Absolute paths on the donor developer's disk will not work on your machine.

Cloning through version control systems (Git)

The most professional approach to copying a project is to use Git. This method not only creates a copy, but also saves the entire history of changes, which is invaluable for tracking experiments. You can create a new branch or fork the repository.

To create an isolated copy via Git, use the clone command, and then create a new remote repository or just work locally. If you need to completely separate the project from the original, the easiest way is to clone the repository, then delete the hidden folder .git and initialize a new history.

Advantages of using Git when copying:

• 🔄 Preserving the complete history of commits and authors.
• 🌿 Ability to easily create branches for different experiments.
• 🤝 Convenience of team work and merging changes.
• 📦 Automatic ignoring of temporary files via .gitignore.

When working with Git, it is important to configure the file correctly .gitignore. It should indicate folders .idea, build, local.properties and signature key files (keystore). This will prevent sensitive data and junk files from entering the repository.

If you use platforms like GitHub or GitLab, the "Use this template" feature allows you to instantly create a new repository based on an existing one, which is similar to copying a project in the cloud. After this, the new repository can be cloned to the local machine.

Solving problems during transfer

Even with careful copying, errors may occur. One of the most common is SDK location not found. It occurs if the copied project contains a file local.properties with paths from the previous developer. The solution is simple: delete this file, and Android Studio will create a new one with the correct paths.

Another common problem is library version conflicts. If a project uses different versions of support libraries or androidx components, Gradle will throw a dependency resolution error. In such cases, you must explicitly specify the versions in the block dependencies or use exclude for conflicting modules.

Compile errors associated with a R class often indicate that the resources were not newly generated. Try running the command Build → Clean Project, and then Build → Rebuild Project. This forces the IDE to rebuild all resources and classes from scratch.

If the project uses native code (C/C++), make sure you have the NDK components installed through the SDK Manager. The lack of native build tools will lead to errors when compiling modules containing CMakeLists.txt or Android.mk.

What if the build.gradle file does not open?

If the file build.gradle does not open or is displayed as text without syntax highlighting, the IDE may not have recognized the project as Gradle project. Try closing the project, deleting the folder .idea and open the project folder again through File → Open, selecting the root directory.

Is it possible to copy only part of the project?

Yes, you can create a new empty project and copy only the necessary modules (module folders) and the corresponding lines there from settings.gradle. However, this requires manual configuration of dependencies between modules.

What to do with the keystore file when copying?

The keystore file (keystore or jks) is needed to sign the application. If you are copying the project for yourself, copy the key file too, remembering the password. If you want to publish it as a new application, create a new key, otherwise there will be a signature conflict in Google Play.

Why did the images in the resources disappear after copying?

Check the case of letters in the file names. On Android, resources should only be named with lowercase letters, numbers, and underscores. If, when copying to Windows (where case is not important), files with capital letters appear, an error will occur at the build stage.

How to reset all IDE settings for a project?

For a complete reset, close Android Studio, delete folders .idea and .gradle in project root, as well as a folder build inside each module. The next time you open the project, the project will be configured as a new one.