[solved]Qt5.2beta + Java native... How to interface (QtAndroidExtras) ?

jamesLee

Hello!
i'm testing to interface between Qt5.2beta-windows-android and Java native ..
but it's very difficult to me. i'v tried various way.. i can not interface any more..
Somebody help me please..
build and deploy are ok. and then when run, error listed ..

#include "mainwindow.h"
#include "ui_mainwindow.h"

//#include <QtTest/QtTest>
#include <QtAndroidExtras/QAndroidJniObject>
#include <QtAndroidExtras/QAndroidJniEnvironment>

MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent)
, ui(new Ui::MainWindow)
{

ui->setupUi(this);
/*if (!mActivitySet) {
    QJNIObjectPrivate::callStaticMethod<void>(bluetoothPlayerClass,
                                       "setActivity",
                                       "(Landroid/app/Activity;)V",
                                       QtAndroidPrivate::activity());
    mActivitySet = true;
}*/

}

void MainWindow::on_pushButton_4_released()
{

QString number = QString::number(123);
QAndroidJniObject parameter = QAndroidJniObject::fromString(number);
jint returnValue = QAndroidJniObject::callStaticMethod<jint>("android/src/bluetooth/myBluetooth",
                                                      "parseInt",
                                                      "(Ljava/lang/String;)I",
                                                      parameter.object<jstring>());

}

jint JNICALL JNI_OnLoad(JavaVM *vm, void *)
{

 JNIEnv *env; 
 if (vm->GetEnv(reinterpret_cast<void **>(&env), JNI_VERSION_1_4) != JNI_OK) { 
    qFatal("Couldn't initialize environment!"); 
    return -1; 
 } 

 AndroidJNIBindings::detectNotificationClientClass(env); 
 return JNI_VERSION_1_4;

}

jclass AndroidJNIBindings::m_notificationClientClass = 0;
void AndroidJNIBindings::detectNotificationClientClass(JNIEnv *environment)
{

jclass clazz = environment->FindClass("android/src/bluetooth/myBluetooth"); 
if (clazz == 0) { 
    environment->ExceptionDescribe(); 
    environment->ExceptionClear(); 
    return; 
} 

m_notificationClientClass = reinterpret_cast<jclass>(environment->NewGlobalRef(clazz));

}

<JAVA PART>
package org.qtproject.example.adsb;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.content.Context;
import android.content.Intent;
...
public class myBluetooth extends org.qtproject.qt5.android.bindings.QtActivity
{

private static final int REQUEST_ENABLE_BT = 0;

private static final int REQUEST_DISCOVERABLE_BT = 0;

private static final String TAG = "Qt Bluetooth";

private static Context mApplicationContext = null;

// Native callback functions for MediaPlayer

 //native public void onErrorNative(int what, int extra, long id);

public static int parseInt(int s)

  {


        final BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();


        mBluetoothAdapter.disable();


       return 1;


  }

}

jamesLee

I'v found the cause.
The package name and classname of callStaticMethod have to be matched..And then between qt and java, argument and return type are have to be matched.

package org.qtproject.example.adsb;
::callStaticMethod<jint>(“android/src/bluetooth/myBluetooth”,
--> ::callStaticMethod<jint>(“org.qtproject.example.adsb/myBluetooth"
“(Ljava/lang/String;)I”,