我正在尝试构建一个插件系统，其中 DexClassLoader 从其他已安装的包含片段（我的插件）的 apk 中获取代码，并将它们显示在我的主机中。这工作得很好。
我也喜欢让插件可热插拔，这意味着我可以从插件更改代码，安装新的，主机会注意到并加载新代码。如果我是第一次更改代码，这也有效。（虽然我认为不应该，但似乎我对这段代码的理解有误：
try {
requiredClass = Class.forName(fullName);
} catch(ClassNotFoundException e) {
isLoaded = false;
}
)
requiredClass = classLoader.loadClass(fullName);如果我用同一个插件第二次尝试它，主机会以类似的方式关闭
libc 致命信号 7 (SIGBUS) 位于 0x596ed4d6 (code=2)，线程 28814 (ctivityapp.host)
有没有人对 DexClassLoader 的功能有更深入的了解，并且可以告诉我，这里发生了什么？我很坚持这一点。
下面是加载外部代码的方法的完整代码：
/**
* takes the name of a package as String, and tries to load the code from the corresponding akp using DexclassLaoder.
* Checking if a package is a valid plugin must be done before calling this.
* The Plugin must contain a public class UI that extends Fragment and implements plugin as a starting point for loading
* @param packageName The full name of the package, as String
* @return the plugins object if loaded, null otherwise
*/
private Plugin attachPluginToHost(String packageName) {
try {
Class<?> requiredClass = null;
final ApplicationInfo info = context.getPackageManager().getApplicationInfo(packageName,0);
final String apkPath = info.sourceDir;
final File dexTemp = context.getDir("temp_folder", 0);
final String fullName = packageName + ".UI";
boolean isLoaded = true;
// Check if class loaded
try {
requiredClass = Class.forName(fullName);
} catch(ClassNotFoundException e) {
isLoaded = false;
}
if (!isLoaded) {
final DexClassLoader classLoader = new DexClassLoader(apkPath, dexTemp.getAbsolutePath(), null, context.getApplicationContext().getClassLoader());
requiredClass = classLoader.loadClass(fullName);
}
if (null != requiredClass) {
// Try to cast to required interface to ensure that it's can be cast
final Plugin plugin = Plugin.class.cast(requiredClass.newInstance());
installedPlugins.put(plugin.getName(), plugin);
return plugin;
}
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
return null;
}
提前谢谢了！