Getting Internal Storage Directory in Android NDK

The function name should be changed to your package name and activity class name.

Writtin in C++.

JNIEXPORT void JNICALL Java_com_jongwook_test_TestActivity_test(JNIEnv * env, jobject obj)
{
 jclass cls = env->GetObjectClass(obj);
 jmethodID getFilesDir = env->GetMethodID(cls, "getFilesDir", "()Ljava/io/File;");
 jobject dirobj = env->CallObjectMethod(obj,getFilesDir);
 jclass dir = env->GetObjectClass(dirobj);
 jmethodID getStoragePath =
                       env->GetMethodID(dir, "getAbsolutePath", "()Ljava/lang/String;");
 jstring path=(jstring)env->CallObjectMethod(dirobj, getStoragePath);
 const char *pathstr=env->GetStringUTFChars(path, 0);
 chdir(pathstr);
 env->ReleaseStringUTFChars(path, pathstr);
}