I have a string array like {"myname","yourname","hisname"} and I am trying to send this array to C with using JNI. I could not find any clear solution for this. I have tried to take this string as a chararray but no success.
Is there a way to do this?
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); // Don't forget to call `ReleaseStringUTFChars` when you're done. } } 
jobject object input required?
DeleteLocalRef on the temporary jstring object returned by GetObjectArrayElement?Yes, there is a way. You would pass the String[] into your native method from the Java side and that would come across to the C/C++ side as a jobjectArray. You would then use GetObjectArrayElement() to get a jstring at a given index and then use GetStringUTFChars() or GetStringChars() to get a C/C++ pointer to the underlying string data.
And if you don't know about it, the JNI Book is a valuable reference.
it can be done in following way:
(JNIEnv *env, jobject object, jobjectArray prdctini) { const char *param[20]; jsize stringCount = (*env).GetArrayLength(prdctini); for (int i=0; i<stringCount; i++) { jstring string = (jstring) (*env).GetObjectArrayElement( prdctini, i); param[i] = (*env).GetStringUTFChars( string, NULL); } cout<<"U_Id="<<param[0]<<endl; cout<<"aggregation="<<param[1]<<endl } 
ReleaseStringUTFChars ?Remember to use
env->GetArrayLength(stringArray); 