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Jean-Marie 'Histausse' Mineau 2025-07-11 19:27:03 +02:00
parent 9e074cf483
commit c272d62903
Signed by: histausse
GPG key ID: B66AEEDA9B645AD2
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2_background/X_android.typ
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@ -1,4 +1,4 @@
#import "../lib.typ": todo, APK, JAR, AXML, ART, SDK, JNI, NDK, DEX, XML
#import "../lib.typ": todo, APK, JAR, AXML, ART, SDK, JNI, NDK, DEX, XML, API
== Android <sec:bg-android>
@ -76,7 +76,7 @@ The `R.java` file allows the developer to refere to ressources with readable nam
The source code is then compile.
The most common programming langages used for Android application are Java and Kotlin.
Both are first compiled to java bytecode in `.class` files using the langage compiler.
To allow access to the Android API, the `.class` are linked during the compilation to an `android.jar` file that contains classes with the same signatures as the one in the Android API for the targeted SDK.
To allow access to the Android #API, the `.class` are linked during the compilation to an `android.jar` file that contains classes with the same signatures as the one in the Android #API for the targeted SDK.
The `.class` files are the converted to #DEX files using `d8`.
During those steeps, both the original langage compiler and `d8` can perform optimizations on the classes.
@ -120,9 +120,9 @@ In the course of a componant live cicle, the system will call specifics methods
Those methods are to be overrident by the classes defined in the application if they are specific action to be perfomed.
For instance, an activitymight compute some values in `onCreate()`, called when the activity is created, save the value of those variable to the file system in `onStop()`, called when the acitivity stop being visible to the user, and recover the saved values in `onRestart()`, called when the user navigate back to the activity.
In addition to the componants declared in the manifest that act as entry points, the Android API heavily relies on callbacks.
In addition to the componants declared in the manifest that act as entry points, the Android #API heavily relies on callbacks.
The most obvious cases are for the user interface, for example a button will call a callback method defined by the application when clicked.
Other part of the API also rely on non-linear execution, for example when an application send an itent (see @sec:bg-sandbox), the intent sent in responce is transmitted to back to the application by calling another method.
Other part of the #API also rely on non-linear execution, for example when an application send an itent (see @sec:bg-sandbox), the intent sent in responce is transmitted to back to the application by calling another method.
==== Application Isolation and Interprocess Communication <sec:bg-sandbox>