Image{  source: "file:///mnt/usbhost1/Config/logo.png"}

QQuickView view;view.setSource(QUrl(QStringLiteral("qrc:///qml/MainView.qml")));QObject *qmlObj =(QObject*) view.rootObject();MainWnd *w=new MainWnd(object);//暴露C++類給qml供其調用，別名mainWndClassview.engine ()->rootContext ()->setContextProperty (QLatin1String("mainWndClass"),w);//c++調用qml中的js方法//參數必須轉換為QVariantQMetaObject::invokeMethod (qmlObj,"showRight",Q_ARG(QVariant,1));//調用子項的js方法qmlPlayer = qmlObj->findChild<QObject*>("playerArea");QMetaObject::invokeMethod (qmlPlayer,"setVideoFile",Q_ARG(QVariant,currentVideoFile));

//MainView.qmlRectangle {  anchors.fill: parent  property int leftAreaWidth: this.width/5*4  property int rightAreaWidth: this.width/5  property int queueFontSize  function showRight(isShow){    ....  }  Player{    id:playerArea    //設置objectName，在c++中才能找到它    objectName: "playerArea"    width: parent.width    height: parent.height  }}

org/rophie/ProjectName即為java類的包名package org.rophie.ProjectName;

package org.rophie.ProjectName;import org.qtproject.qt5.android.bindings.QtActivity;import android.widget.Toast;import android.media.AudioManager;import android.content.Context;public class JavaClass extends QtActivity{  private static JavaClass m_instance;  private static AudioManager mAudioManager;  public JavaClass()  {    //構造函數必須    m_instance = this;  }   public static void setVolume(int vol){   if(mAudioManager==null){     mAudioManager = (AudioManager)m_instance.getSystemService(Context.AUDIO_SERVICE);   }     mAudioManager.setStreamVolume(AudioManager.STREAM_MUSIC, vol, 0);   }}

QAndroidJniObject::callStaticMethod<void>("org/rophie/ProjectName/JavaClass","setVolume","(I)V",3); //具體參照QAndroidJniObject類

public void onReceive(Context context, Intent intent) { ...... //JavaClass為繼承QtActivity的java主類 Intent intent2 = new Intent(context, JavaClass.class); ......}