dalvik.system

Class DexClassLoader

java.lang.Object

java.lang.ClassLoader

dalvik.system.BaseDexClassLoader

dalvik.system.DexClassLoader

public class DexClassLoader
extends BaseDexClassLoader

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.

This class loader requires an application-private, writable directory to cache optimized classes. Use Context.getCodeCacheDir() to create such a directory:

   
   File dexOutputDir = context.getCodeCacheDir();
 

Do not cache optimized classes on external storage. External storage does not provide access controls necessary to protect your application from code injection attacks.

Field Summary

Fields inherited from class java.lang.ClassLoader

proxyCache

Constructor Summary

Constructors

Constructor and Description
DexClassLoader(String dexPath, String optimizedDirectory, String libraryPath, ClassLoader parent) Creates a DexClassLoader that finds interpreted and native code.

Method Summary

Methods inherited from class dalvik.system.BaseDexClassLoader

findClass, findLibrary, findResource, findResources, getLdLibraryPath, getPackage, toString

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findLoadedClass, findSystemClass, getPackages, getParent, getResource, getResourceAsStream, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, loadClass, loadClass, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DexClassLoader

public DexClassLoader(String dexPath,
                      String optimizedDirectory,
                      String libraryPath,
                      ClassLoader parent)

Creates a DexClassLoader that finds interpreted and native code. Interpreted classes are found in a set of DEX files contained in Jar or APK files.

The path lists are separated using the character specified by the path.separator system property, which defaults to :.

Parameters:

dexPath - the list of jar/apk files containing classes and resources, delimited by File.pathSeparator, which defaults to ":" on Android

optimizedDirectory - directory where optimized dex files should be written; must not be null

libraryPath - the list of directories containing native libraries, delimited by File.pathSeparator; may be null

parent - the parent class loader