如何保持在屏幕上的Qt为Android？ [英] How to keep the screen on in Qt for android?

问题描述

我发现一对夫妇的解决方案如何做到这一点在Java中，却没有发现我怎么能做到这一点的QML Qt的或。我知道，首先我应该设置在的Andr​​oidManifest.xml 的 WAKE_LOCK 许可。我应该怎么做，以使其能够打开和关闭屏幕在运行时从Qt的锁？

I found a couple of solutions how to do that in Java, but did not find how can I do it in QML or Qt. I know that first I should set the WAKE_LOCK permission in AndroidManifest.xml. What should I do to make it possible to turn on and off the screen locking from Qt in runtime?

推荐答案

您可以使用 Qt的额外的Andr​​oid 模块，并使用JNI调用从C ++相关的Java功能。是这样的：

You can use the Qt Android Extras module and use JNI to call the relevant Java function from C++. Something like :

void keepScreenOn() 
{
    QAndroidJniObject activity = QtAndroid::androidActivity();
    if (activity.isValid()) {
        QAndroidJniObject window = activity.callObjectMethod("getWindow", "()Landroid/view/Window;");

        if (window.isValid()) {
            const int FLAG_KEEP_SCREEN_ON = 128;
            window.callObjectMethod("addFlags", "(I)V", FLAG_KEEP_SCREEN_ON);
        }
    }
}

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