Qt on Android c++与Java互相交互

这里做个例子，已经实现了他们互相交互，这里例子是整形和字符型。

可以先看一下我写的java简单案例（为了方便演示都做成静态了）：

package com.demo.cppandjava;

public class democppandjava

{

    private static int tmpNum = 1;

    private static String tmpStr = "123";

    public static void setInt(int num) {

        tmpNum = num;

    }

    public static int getInt() {

        return tmpNum;

    }

    public static void setString(String str) {

        tmpStr = str;

    }

    public static String getString() {

        return tmpStr;

    }

}

来看一下对应互相交互函数：    //Cpp与java交互

void MainWindow::cppAssignmentJavaInt(int num)

{

#ifdef Q_OS_ANDROID

    QAndroidJniObject::callStaticMethod<void>(

                "com/demo/cppandjava/democppandjava",

                "setInt",

                "(I)V",

                num);

#endif

}

int MainWindow::cppUseJavaToInt()

{

#ifdef Q_OS_ANDROID

    return QAndroidJniObject::callStaticMethod<jint>("com/demo/cppandjava/democppandjava", "getInt");

#endif

}

void MainWindow::cppAssignmentJavaString(QString str)

{

#ifdef Q_OS_ANDROID

    QAndroidJniObject strTMP = QAndroidJniObject::fromString(str);

    QAndroidJniObject::callStaticMethod<void>(

                "com/demo/cppandjava/democppandjava",

                "setString",

                "(Ljava/lang/String;)V",

                strTMP.object<jstring>());

#endif

}

QString MainWindow::cppUseJavaToString()

{

#ifdef Q_OS_ANDROID

    QAndroidJniObject str = QAndroidJniObject::callStaticObjectMethod("com/demo/cppandjava/democppandjava",

                                                     "getString",

                                                     "()Ljava/lang/String;");

    return str.toString();

#endif

}

整型是简单的，字符型稍稍要绕一下。要注意"()Ljava/lang/String;"这里有个分号哦！~

我已经把代码上传到CSDN：http://download.csdn.net/detail/u014597198/9816271