Utility method in JNI layer
suggest changeThis method will help to get the Java string from C++ string.
jstring getJavaStringFromCPPString(JNIEnv *global_env, const char* cstring) {
jstring nullString = global_env->NewStringUTF(NULL);
if (!cstring) {
return nullString;
}
jclass strClass = global_env->FindClass("java/lang/String");
jmethodID ctorID = global_env->GetMethodID(strClass, "<init>",
"([BLjava/lang/String;)V");
jstring encoding = global_env->NewStringUTF("UTF-8");
jbyteArray bytes = global_env->NewByteArray(strlen(cstring));
global_env->SetByteArrayRegion(bytes, 0, strlen(cstring), (jbyte*) cstring);
jstring str = (jstring) global_env->NewObject(strClass, ctorID, bytes,
encoding);
global_env->DeleteLocalRef(strClass);
global_env->DeleteLocalRef(encoding);
global_env->DeleteLocalRef(bytes);
return str;
}
This method will help you to convert jbyteArray to char
char* as_unsigned_char_array(JNIEnv *env, jbyteArray array) {
jsize length = env->GetArrayLength(array);
jbyte* buffer = new jbyte[length + 1];
env->GetByteArrayRegion(array, 0, length, buffer);
buffer[length] = '\0';
return (char*) buffer;
}
Found a mistake? Have a question or improvement idea?
Let me know.
Table Of Contents