InstrumentationHook中替换某个Activity的Resource

[xulong20130712]

请问为什么我在newActivity中通过下面代码替换Resource一直报错找：
if(newActivity.getClass().getSimpleName().contains("Second")) {

                String apkPath= Environment.getExternalStorageDirectory().getPath()+ File.separator+"plugin"+ File.separator+"resource.apk";
                Resources resources= DynamicResourceUtil.getPluginResources(apkPath, getTargetContext());
                RuntimeArgs.delegateResources= resources;
                SysHacks.ContextThemeWrapper_mResources.set(newActivity, resources);
            }else {

                SysHacks.ContextThemeWrapper_mResources.set(newActivity, RuntimeArgs.delegateResources);
            }