Question setting shutter speed and iso

[pyzahl]

I am working on a new app to auto shoot Solar Eclipses... "SoFiMagic".

I have not found yet out how to adjust shutter speed and iso using this API.

I tried changing camera parameters but nothing is changed.

Update:
I found hints in BetterManual for ISO setting....
But setting the ShutterSpeed still is an issue...

OK in case any one also needs this, finally:

private void setShutterSpeed(int sec, int frac)
    {
        final int shutterIndex = CameraUtilShutterSpeed.getShutterValueIndex(sec,frac);
        final int shutterDiff = shutterIndex - CameraUtilShutterSpeed.getShutterValueIndex(getCurrentShutterSpeed());
        log("set ShutterSpeed " + String.valueOf(sec) + "/" + String.valueOf(frac) + "s" + " shutterIndexDiff:" + String.valueOf(shutterDiff));
        if (shutterDiff != 0)
            cameraEx.adjustShutterSpeed(-shutterDiff);
   }

    private Pair<Integer, Integer> getCurrentShutterSpeed()
    {
        final Camera.Parameters params = cameraEx.getNormalCamera().getParameters();
        final CameraEx.ParametersModifier paramsModifier = cameraEx.createParametersModifier(params);
        return paramsModifier.getShutterSpeed();
    }