how to load class dynamically at aar file with DexClassLoader
I have succeeded in dynamically loading classes from a dex file in the following way
enter code here
File file = getDir("dex", 0);
DexClassLoader dexClassLoader = new DexClassLoader("/data/data/com.example.callerapp/files/test.dex", file.getAbsolutePath(), null, getClassLoader());
try {
Class<Object> _class = (Class<Object>)
dexClassLoader.loadClass("com.example.calledapp.test");
Object object = _class.newInstance();
Method method = _class.getMethod("function");
method.invoke(object);
} catch (Exception e) {
e.printStackTrace();
}
But what I want to do is load the class dynamically from the aar file, as shown in the android dev page(DexClassLoader : A class loader that loads classes from .jar and .apk files containing a classes.dex entry. This can be used to execute code not installed as part of an application.)
I created a library module("testlibrary") in the Android studio, created Test.java(what I want to load dynimically at caller app) in the library module, and created an aar file through the Gradle Project -> Excute Gradle Task
How can I dynamically load a class via the dexclassloader in an aar file created in this general way? I have moved aar file via provider to CallerApp from CalledApp
Or is the process of creating an aar file wrong? During runtime, an error message appears
02-10 09:43:48.744 16487-16487/com.example.callerapp W/System.err: java.lang.ClassNotFoundException: Didn't find class "com.example.calledlibrary.Test" on path: DexPathList[[zip file "/data/data/com.example.callerapp/files/testlibrary.aar"],nativeLibraryDirectories=[/system/lib64, /vendor/lib64]]
02-10 09:43:48.744 16487-16487/com.example.callerapp W/System.err: at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:93)
02-10 09:43:48.744 16487-16487/com.example.callerapp W/System.err: at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
02-10 09:43:48.744 16487-16487/com.example.callerapp W/System.err: at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
02-10 09:43:48.745 16487-16487/com.example.callerapp W/System.err: at com.example.callerapp.CallerActivity.onClick(CallerActivity.java:42)
02-10 09:43:48.745 16487-16487/com.example.callerapp W/System.err: at android.view.View.performClick(View.java:6877)
02-10 09:43:48.745 16487-16487/com.example.callerapp W/System.err: at android.widget.TextView.performClick(TextView.java:12651)
02-10 09:43:48.745 16487-16487/com.example.callerapp W/System.err: at android.view.View$PerformClick.run(View.java:26069)
02-10 09:43:48.745 16487-16487/com.example.callerapp W/System.err: at android.os.Handler.handleCallback(Handler.java:789)
02-10 09:43:48.746 16487-16487/com.example.callerapp W/System.err: at android.os.Handler.dispatchMessage(Handler.java:98)
02-10 09:43:48.746 16487-16487/com.example.callerapp W/System.err: at android.os.Looper.loop(Looper.java:164)
02-10 09:43:48.746 16487-16487/com.example.callerapp W/System.err: at android.app.ActivityThread.main(ActivityThread.java:6938)
02-10 09:43:48.746 16487-16487/com.example.callerapp W/System.err: at java.lang.reflect.Method.invoke(Native Method)
02-10 09:43:48.746 16487-16487/com.example.callerapp W/System.err: at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
02-10 09:43:48.747 16487-16487/com.example.callerapp W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
02-10 09:43:48.747 16487-16487/com.example.callerapp W/System.err: Suppressed: java.io.IOException: No original dex files found for dex location (arm64) /data/data/com.example.caller/files/testlibrary.aar
02-10 09:43:48.747 16487-16487/com.example.callerapp W/System.err: at dalvik.system.DexFile.openDexFileNative(Native Method)
02-10 09:43:48.747 16487-16487/com.example.callerapp W/System.err: at dalvik.system.DexFile.openDexFile(DexFile.java:353)
02-10 09:43:48.747 16487-16487/com.example.callerapp W/System.err: at dalvik.system.DexFile.<init>(DexFile.java:100)
02-10 09:43:48.748 16487-16487/com.example.callerapp W/System.err: at dalvik.system.DexFile.<init>(DexFile.java:74)
02-10 09:43:48.748 16487-16487/com.example.callerapp W/System.err: at dalvik.system.DexPathList.loadDexFile(DexPathList.java:374)
02-10 09:43:48.748 16487-16487/com.example.callerapp W/System.err: at dalvik.system.DexPathList.makeDexElements(DexPathList.java:337)
02-10 09:43:48.748 16487-16487/com.example.callerapp W/System.err: at dalvik.system.DexPathList.<init>(DexPathList.java:157)
02-10 09:43:48.748 16487-16487/com.example.callerapp W/System.err: at dalvik.system.BaseDexClassLoader.<init>(BaseDexClassLoader.java:65)
02-10 09:43:48.748 16487-16487/com.example.callerapp W/System.err: at dalvik.system.DexClassLoader.<init>(DexClassLoader.java:57)
02-10 09:43:48.748 16487-16487/com.example.callerapp W/System.err: at com.example.caller.CallerActivity.onClick(CallerActivity.java:40)
02-10 09:43:48.749 16487-16487/com.example.callerapp W/System.err: ... 10 more
You can not load aar file at runtime because aar file contains resources and classes.jar file and does not conatain a dex file.
But
you can use injector gradle plugin to get dex from your aar and merge all your aar resources into your project and after that you can use injector-android lib to load that dex files at runtime. Check out inject-example project