如何在qt6中使用类java的静态方法

Question

我有：MyFile.java：

import android.net.Uri
import android.content.ContentResolver
import android.os.ParcelFileDescriptor

package org.qtproject.example.p2p; // what I need write here?
public class MyFile {
    static int getFdFromString(ContentResolver cr, String suri) {
        var uri = Uri(suri);
        var fd = cr.openFileDescriptor(uri, "r");
        var res = fd.getFd();
        return res;
    }
}

我的应用程序中的代码：

qDebug("================================================================================================");
    auto activity = QJniObject(QNativeInterface::QAndroidApplication::context());
    QJniObject uriString = QJniObject::fromString(filename);
    QJniObject contentResolver = activity.callObjectMethod("getContentResolver", "()Landroid/content/ContentResolver;");
    jint fd = QJniObject::callStaticMethod<jint>("MyFile",  // what I need to write without "MyFile"?
                                                       "getFdFromString",
                                                       "(Landroid/content/ContentResolver;Ljava/lang/String)I",
                                                       contentResolver.object<jobject>(), uriString.object<jobject>());
    qDebug() << fd;
    qDebug("================================================================================================");

如何连接此文件？（从Qt（c）代码运行静态方法）

Answer 1

这有帮助吗？

 jint fd = QJniObject::callStaticMethod<jint>("org/qtproject/example/p2p",
                                                           "getFdFromString",
                                                           "(Landroid/content/ContentResolver;Ljava/lang/String)I",
                                                           contentResolver.object<jobject>(), uriString.object<jobject>());

我认为你的java类的路径是

org/qtproject/example/p2p

还要更正java文件，将包放在文件的第一行，然后导入

package org.qtproject.example.p2p;
import android.net.Uri
import android.content.ContentResolver
import android.os.ParcelFileDescriptor

     
    public class MyFile {
        static int getFdFromString(ContentResolver cr, String suri) {
            var uri = Uri(suri);
            var fd = cr.openFileDescriptor(uri, "r");
            var res = fd.getFd();
            return res;
        }
    }