dynamic-loading

How to specify (non-R) library path for dynamic library loading in R?

孤人 提交于 2019-11-27 20:44:01
问题 I keep getting the following error when attempting to install readxl or haven in R (both dependencies of tidyverse ) post-compilation, when the installer runs the loading test: ** testing if installed package can be loaded Error in dyn.load(file, DLLpath = DLLpath, ...) : unable to load shared object '<my_lib_Path>/readxl/libs/readxl.so': <my_lib_path>/readxl/libs/readxl.so: undefined symbol: libiconv Error loading failed I have libiconv.so in a local lib path (not for R packages) that is

What exactly does `-rdynamic` do and when exactly is it needed?

倖福魔咒の 提交于 2019-11-27 05:21:36
问题 What exactly does -rdynamic (or --export-dynamic at the linker level) do and how does it relate to symbol visibility as defined by the -fvisibility* flags or visibility pragma s and __attribute__ s? For --export-dynamic , ld(1) mentions: ... If you use "dlopen" to load a dynamic object which needs to refer back to the symbols defined by the program, rather than some other dynamic object, then you will probably need to use this option when linking the program itself. ... I'm not sure I

Difference between System.load() and System.loadLibrary in Java

断了今生、忘了曾经 提交于 2019-11-27 03:52:51
What is the difference between System.load() and System.loadLibrary() in java? I want to load a library but I don't want to add the path to environment variables. Will any one of these help? Kal The difference is there in the API documentation. System.loadLibrary(String libname) lets you load from the default path -- The Java library path. The other System.load(String filename) lets you load it from an absolute path, which you must specify as your filename. If you don't want to mess with you java.library.path environment variable, you should use System.load() 来源: https://stackoverflow.com

dynamic listview adding “Load more items” at the end of scroll

为君一笑 提交于 2019-11-26 17:15:48
I have a listview which is fetching data from sqlite database by Json. I want to turn it into dynamic listview that at the end of scroll, a "load more items" appears in the footer of the list while loading more items and adding them to the adapter (for example 10 items each time). I have problem in implementing this feature. Please help me with it. Thanks. public class AllProductsActivity extends Activity { ... defining variables...; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); new LoadAllProducts().execute(); }

Difference between System.load() and System.loadLibrary in Java

一笑奈何 提交于 2019-11-26 10:56:54
问题 What is the difference between System.load() and System.loadLibrary() in java? I want to load a library but I don\'t want to add the path to environment variables. Will any one of these help? 回答1: The difference is there in the API documentation. System.loadLibrary(String libname) lets you load from the default path -- The Java library path. The other System.load(String filename) lets you load it from an absolute path, which you must specify as your filename. If you don't want to mess with

dynamic listview adding “Load more items” at the end of scroll

 ̄綄美尐妖づ 提交于 2019-11-26 05:18:47
问题 I have a listview which is fetching data from sqlite database by Json. I want to turn it into dynamic listview that at the end of scroll, a \"load more items\" appears in the footer of the list while loading more items and adding them to the adapter (for example 10 items each time). I have problem in implementing this feature. Please help me with it. Thanks. public class AllProductsActivity extends Activity { ... defining variables...; @Override public void onCreate(Bundle savedInstanceState)

How do I programmatically compile and instantiate a Java class? [duplicate]

不羁岁月 提交于 2019-11-25 22:08:40
问题 This question already has an answer here: How do you dynamically compile and load external java classes? [duplicate] 2 answers I have the class name stored in a property file. I know that the classes store will implement IDynamicLoad. How do I instantiate the class dynamically? Right now I have Properties foo = new Properties(); foo.load(new FileInputStream(new File(\"ClassName.properties\"))); String class_name = foo.getProperty(\"class\",\"DefaultClass\"); //IDynamicLoad newClass = Class