qt android播放器代码,Qt on android 播放视频的实现
时间: 2023-09-10 09:07:58 浏览: 143
以下是一个简单的Qt Android播放器的代码示例:
```cpp
#include <QtAndroidExtras>
#include <QtMultimedia>
class AndroidPlayer : public QObject
{
Q_OBJECT
public:
AndroidPlayer(QObject *parent = nullptr) : QObject(parent) {}
public slots:
void play(const QUrl &url)
{
QAndroidJniObject jUrl = QAndroidJniObject::fromString(url.toString());
QAndroidJniObject jIntent("android/content/Intent", "(Ljava/lang/String;)V", jUrl.object<jstring>());
QAndroidJniObject jActivity = QtAndroid::androidActivity();
jActivity.callObjectMethod("startActivity", "(Landroid/content/Intent;)V", jIntent.object());
}
};
class MediaPlayer : public QObject
{
Q_OBJECT
public:
MediaPlayer(QObject *parent = nullptr) : QObject(parent)
{
m_player = new QMediaPlayer(this);
connect(m_player, &QMediaPlayer::stateChanged, this, &MediaPlayer::stateChanged);
}
signals:
void mediaStateChanged(QMediaPlayer::State state);
public slots:
void play(const QUrl &url)
{
m_player->setMedia(url);
m_player->play();
}
void pause()
{
m_player->pause();
}
void stop()
{
m_player->stop();
}
private slots:
void stateChanged(QMediaPlayer::State state)
{
emit mediaStateChanged(state);
}
private:
QMediaPlayer *m_player;
};
int main(int argc, char *argv[])
{
QGuiApplication app(argc, argv);
AndroidPlayer androidPlayer;
MediaPlayer mediaPlayer;
QObject::connect(&androidPlayer, &AndroidPlayer::play, &mediaPlayer, &MediaPlayer::play);
QQuickView view;
view.rootContext()->setContextProperty("androidPlayer", &androidPlayer);
view.rootContext()->setContextProperty("mediaPlayer", &mediaPlayer);
view.setSource(QUrl("qrc:/main.qml"));
view.show();
return app.exec();
}
```
上面的代码中,我们创建了一个名为 `AndroidPlayer` 的类,用于在Android上打开视频URL。我们通过调用 `QAndroidJniObject` 和 `QtAndroid::androidActivity()` 来实现这一点。我们还创建了一个名为 `MediaPlayer` 的类,用于播放视频。我们在 `MediaPlayer` 的构造函数中创建了一个 `QMediaPlayer` 对象,并将其连接到 `stateChanged()` 槽。我们通过将 `AndroidPlayer` 和 `MediaPlayer` 连接起来来实现播放视频。最后,我们将 `AndroidPlayer` 和 `MediaPlayer` 的实例作为上下文属性添加到QML视图中,以便可以在QML中访问它们。
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