qt-everywhere-src-5.15.1/qtandroidextras/examples/androidextras/musiclist/musiclist.cpp

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#include "musiclist.h"

#include <QAndroidIntent>
#include <QAndroidJniEnvironment>

MusicList::MusicList(QObject *parent) : QObject(parent)
{
    QAndroidJniObject musicList = QAndroidJniObject::callStaticObjectMethod(
        "org/qtproject/example/musiclist/MusicList",
        "fetchMusicList",
        "(Landroid/content/Context;)Ljava/util/ArrayList;",
        QtAndroid::androidContext().object());

    for (int i = 0; i < musicList.callMethod<jint>("size"); ++i) {
        QAndroidJniObject track = musicList.callObjectMethod("get", "(I)Ljava/lang/Object;", i);
        const QString title = track.callObjectMethod("getTitle", "()Ljava/lang/String;").toString();
        const QString artist = track.callObjectMethod("getArtist", "()Ljava/lang/String;").toString();
        const long duration = track.callMethod<jlong>("getDuration");
        m_assembledMusicList.append(new MusicTrack(title, artist, duration, this));
    }
}

QList<MusicTrack *> MusicList::assembledMusicList() const
{
    return m_assembledMusicList;
}