So, why is it left so late to set the applicationID? The simple reason is that it would cause no end of problems if it was set earlier in the process.
Android studio change package name code#
This won’t cause anyone any issues in the vast majority of cases but if, for example, you are generating code from an annotation processor, it can be important to understand when to use the package name over the applicationId and vice versa. Thirdly, although the package name has not been set in the Manifest at the point when our code is compiled, we can still gain access to the final application ID for the current build flavor via the BuildConfig.APPLICATION_ID constant. That is because the BuildConfig.java and R.java both got generated in the package name that was specified originally in the Manifest –. Secondly, when we come to reference our BuildConfig, we don’t need to fully qualify the package name, or import the package. As is normal we have matched this to the package name which we initially defined in the Manifest (shown earlier). The first thing to note is the Java package name of MainActivity itself. The three highlighted lines actually explain what happens during the build. So why is this important? Let’s begin by adding some code to our main Activity firstly a simple layout containing two TextViews:
For proof of this, take a look here, specifically the final note which states:Īlthough you may have a different name for the manifest package and the Gradle applicationId, the build tools copy the application ID into your APK’s final manifest file at the end of the build The package name controls much of what occurs during the build, but the application ID only gets applied right at the very end.
Android studio change package name android#
There should be nothing here that should be surprising to the vast majority of Android developers, but from here on it is important to understand the difference between the Package Name – which gets declared up-front in the base Manifest and the application ID – which gets declared in our adle. If we now compare the two Manifests which get added to the two APKs we can see how distinct package names are specified in each Manifest: replace the whole of the package name with the applicationId, but we’ll just add a suffix here. It is possible to override the entire applicationId (i.e. Here we add a distinct suffix to the applicationId for both debug and release builds.
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