To fix the "Error type 3: Activity class does not exist" issue with React-Native productFlavors in Gradle, you can check the Manifest file for any errors or inconsistencies. With these steps, you should be able to fix the "Error type 3: Activity class does not exist" issue in Gradle when using React-Native productFlavors by checking the main activity class name. Save the adle file and run the Gradle build command again.Below these fields, add the following code to specify the main activity class name:.In the defaultConfig section, locate the applicationId and versionCode fields.Open the android/app/adle file and search for the defaultConfig section.Copy the value of the android:name attribute.This attribute specifies the name of the main activity class. Open the AndroidManifest.xml file and search for the android:name attribute in the activity tag.Navigate to the android/app/src/main directory.Open your React Native project in your preferred code editor.To fix this issue, you can follow the steps below: One of the common reasons for the "Error type 3: Activity class does not exist" in Gradle when using React-Native productFlavors is a mismatch between the main activity class name and the one specified in the adle file. Method 1: Check the Main Activity Class Name In this article, we will discuss some of the common causes of this error and methods to solve it. When building an app with product flavors, it is common to encounter the error "Error type 3: Activity class does not exist." This error indicates that the build system is unable to find the main Activity class of the app, which is the entry point for the app's user interface. One of the features of Gradle is the ability to define product flavors, which are different versions of the app built from the same code base but with different configurations. Gradle is a build system used by React-Native to manage the build process and dependencies of an Android app.
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