DexClassloader run error on Android5.0 - dexclassloader

Question

Before Android5.0，I use DexClassloader load plugin dynamiclly，code like this：
DexClassLoader localDexClassLoader = new DexClassLoader(pluginSrcJarDir,cont.getDir("dex", 0).getAbsolutePath(), null, ClassLoader.getSystemClassLoader().getParent());
Class<?> pluginClass = localDexClassLoader.loadClass(className); //error here
but on Android5.0 here is the error：
04-03 05:51:42.743: W/(1462): Zip: 792 extraneous bytes at the end of
the central directory 04-03 05:51:42.749: W/System.err(1462):
java.lang.ClassNotFoundException: Didn't find class
"com.garfield.item0.system.plugin01.AckGetIntroduce" on path:
DexPathList[[zip file
"/data/data/com.garfield/cache/1428040302214.jar"],nativeLibraryDirectories=[/vendor/lib,
/system/lib]] 04-03 05:51:42.811: W/System.err(1462): Suppressed:
java.io.IOException: Failed to open zip archive
'/data/data/com.garfield/cache/1428040302214.jar' 04-03 05:51:42.820:
W/System.err(1462): at
dalvik.system.DexFile.openDexFileNative(Native Method) 04-03
05:51:42.820: W/System.err(1462): at
dalvik.system.DexFile.openDexFile(DexFile.java:295) 04-03
05:51:42.821: W/System.err(1462): at
dalvik.system.DexFile.(DexFile.java:111) 04-03 05:51:42.821:
W/System.err(1462): at
dalvik.system.DexFile.loadDex(DexFile.java:151) 04-03 05:51:42.821:
W/System.err(1462): at
dalvik.system.DexPathList.loadDexFile(DexPathList.java:265)
why？please help me！before 5.0 it is ok。what happened on 5.0！

Answer 1

From Android 5.0 on, the JVM on which Android runs on is ART but not Dalvik anymore. And look at your logcat trace:
dalvik.system.DexPathList.loadDexFile
your codes still tried to run Dalvik things.