Android GetSystemService for Power Manager via Qt

[GoodMorninSunshine]

Hi All,

I need some help in using the power services manager in Android. THe code that I need to write in Java is :
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);

To do this in Qt I have done :
@QAndroidJniObject activity = QtAndroid::androidActivity()
QAndroidJniObject context = activity.callObjectMethod("getApplicationContext","()Landroid/content/Context;");
if(!context.isValid())
qDebug() << "Context Not Valid";
QAndroidJniObject powerString = QAndroidJniObject::fromString("power");
powerManager = context.callObjectMethod("getSystemService", "(Ljava/lang/String;)Landroid/os/PowerManager;", powerString.object<jstring>());
if(!powerManager.isValid())
qDebug() << "Power manager invalid";
else
powerManager.callObjectMethod( "isScreenOn","()Z");
@

I keep getting that power manager is invalid.
What am I doing wrong?

I have also tried with @QAndroidJniObject powerString = QAndroidJniObject::fromString("POWER_SERVICE");@ ,
but still the powerManager is invalid! :(

Can someone please give me a clue as to how to fix this, or a work around...

Thanks so much!

[Adam]

getSystemService(String) returns an Java Object so try

powerManager = context.callObjectMethod("getSystemService", "(Ljava/lang/String;)Ljava/lang/Object;", powerString.object<jstring>());