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Jean-Marie 'Histausse' Mineau 2025-07-15 23:36:21 +02:00
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@ -122,7 +122,7 @@ We discuss in the next section how to obtain these classes from the emulator.
@fig:cl-archisdk shows how classes of Android are used in the development environment and at runtime.
In the development environment, Android Studio uses `android.jar` and the specific classes written by the developer.
After compilation, only the classes of the developer, and eventually extra classes computed by Android Studio are zipped in the APK file, using the multi-dex format.
After compilation, only the classes of the developer, and sometimes extra classes computed by Android Studio are zipped in the APK file, using the multi-dex format.
At runtime, the application uses `BootClassLoader` to load the #platc from Android.
Until our work, previous works@he_systematic_2023 @li_accessing_2016 considered both #Asdk and #hidec to be in the file `/system/framework/framework.jar` found in the phone itself, but we found that the classes loaded by `bootClassLoader` are not all present in `framework.jar`.
For example, He #etal @he_systematic_2023 counted 495 thousand APIs (fields and methods) in Android 12, based on Google documentation on restriction for non SDK interfaces#footnote[https://developer.android.com/guide/app-compatibility/restrictions-non-sdk-interfaces].