JNI

Pass String as parameter from Android code to Java Native Code

Android Java Code:

public static final String JNI_LIB_NAME = "sampleJniLibrary";

public class JNIClass {
static {

              System.loadLibrary(JNI_LIB_NAME);

       }

    public native void addClientList(String userName, String password,

                     String ipAddress, int mode);

}

JNI C Code:

Void

Java_com _android_sample_JNIClass_addClientList( JNIEnv* env, jobject thiz, jstring user, jstring passwd, jstring ip, jint ipermission )

{

     const char *tuser;

     const char *tpasswd;

     const char *tip;

     int tipermission;

     tuser = (*env)->GetStringUTFChars(env, user, 0);

     tpasswd = (*env)->GetStringUTFChars(env, passwd, NULL);

     tip = (*env)->GetStringUTFChars(env, ip, 0);

     tipermission =  ipermission;

     // do required operation

     add_client_list(tuser, tpasswd, tip, tipermission);

     //release resources when done
     (*env)->ReleaseStringUTFChars(env, user, tuser); 

     (*env)->ReleaseStringUTFChars(env, passwd, tpasswd);    

     (*env)->ReleaseStringUTFChars(env, ip, tip);    

     return;

}