java - 在 C++ 中无法使用 QAndroidJniObject JNI 从 java 上下文中检索 jlong​​ 的值。异常 java.lang.NoSuchMethodError

Question

在 C++ 上下文中，当使用 QAndroidJniObject JNI 从 java 上下文调用函数时，无法检索 jlong​​ 的值。仅检索 jstring 值。如何提取jlong​​？如何才能做到这一点？如果在 Qt 中可能的话，也许我需要在 JNI extern C... 上传递而不是 QAndroidJniObject ？

//----------In Java context:
package com.sim.lib.operation.OperationData

public class OperationData {
    private final String mID;
    private Long mAmount;
    public String getID() {
        return this.mID;
    }
    public Long getAmount() {
        return this.mAmount;
    }
    OperationData(){
        this.mAmount = 55;
        this.mID = "someid111";
    }
}
//----------In Java context:
//other package
import com.sim.lib.operation.OperationData
public static native void approvedStatusSendToQt(java.lang.Object statusObj);
OperationData mOperationData = new OperationData();
approvedStatusSendToQt((Object)mOperationData);
//------------------------------------------------In C++ context:
void AndroidClass::registerNatives()
{
    JNINativeMethod methods[] {
        {"approvedStatusSendToQt", "(Ljava/lang/Object;)V",reinterpret_cast<void *>(onOperationStatusApprovedReceived)}
    }
//.....register method
};
static void onOperationStatusApprovedReceived(JNIEnv *env, jobject /*thiz*/,jobject statusObj)
{
      QAndroidJniObject callbackObj(statusObj);
qDebug()<<"mId"<<callbackObj.callObjectMethod<jstring>("getID").toString(); //Print  "someid111" it's ok
qDebug()<<"mAmount"<< callbackObj.callMethod<jlong>("getAmount", "()J"); //Print exception  System.err: java.lang.NoSuchMethodError: no non-static method "Lcom/sim/lib/operation/OperationData;.getAmount()J"
//qDebug()<<"mAmount"<< callbackObj.callMethod<jlong>("getAmount");//the same mistake 
}