You can always access the directory in which your app is placed. This directory is usually : data/data/<Your_package_name_usually com.android.appName>/files/<your_filename> but better use getFilesDir() to ensure valid filepath with future version changes of android. If you wanna use external storage instead, make sure you place this line of code in your app manifest to gain permission. … Read more
You can achieve what you’re looking for with SWIG+Java using “Directors”, however it’s not quite as straightforward mapping from the C++ abstract classes onto Java as you might hope. My answer therefore is split into three parts – firstly the simple example of implementing a C++ pure virtual function in Java, secondly an explanation of … Read more
[DISCLAIMER: Note that this solution always was hackish. And in most cases won’t work anymore nowadays. Check Benjamins answer for more info] There is a way to determine all currently loaded native libraries if you meant that. Already unloaded libraries can’t be determined. Based on the work of Svetlin Nakov (Extract classes loaded in JVM … Read more
Just download the SQLite3 amalgamation source file from: http://www.sqlite.org/download.html And then add sqlite3.c to your LOCAL_SRC_FILES variable in Android.mk.
You can write a simple function that takes a jobjectArray object, cast each one to jstring and then call GetStringUTFChars on it. Like this: void MyJNIFunction(JNIEnv *env, jobject object, jobjectArray stringArray) { int stringCount = env->GetArrayLength(stringArray); for (int i=0; i<stringCount; i++) { jstring string = (jstring) (env->GetObjectArrayElement(stringArray, i)); const char *rawString = env->GetStringUTFChars(string, 0); // … Read more
If you have a native project with LOCAL_MODULE “libXYZ”, make sure to load it as System.loadLibrary(“XYZ”);
You have to tell your compiler where is the include directory. Something like this: gcc -I/usr/lib/jvm/jdk1.7.0_07/include But it depends on your makefile.
First, ensure that your version of Eclipse and JDK match, either both 64-bit or both 32-bit (you can’t mix-and-match 32-bit with 64-bit). Second, the -vm argument in eclipse.ini should point to the java executable. See http://wiki.eclipse.org/Eclipse.ini for examples. If you’re unsure of what version (64-bit or 32-bit) of Eclipse you have installed, you can determine … Read more
Update. This answer is quite popular even four years after I write it, in this four years a lot of things has changed, so I decided to update my answer to fit better our current reality. The answer idea does not change; the implementation has changed a little. My English also has changed, it has … Read more
You can set it on the command line thus: java -Djava.library.path=… <existing arguments (classpath, name of class to run etc.)> and point it to the directory containing the relevant library.