Problem with attempt to invoke interface method

almartinez

protected void boardReady() throws com.mbientlab.metawear.UnsupportedModuleException
{
    tempModule= mwBoard.getModuleOrThrow(Temperature.class);
    Temperature.Sensor tempsensor = tempModule.sensors()[0];
    tempsensor.addRouteAsync(source -> source.stream((data, env) -> {
        Log.i("boardReady", "*****************************");
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    textview.setText("Temperature (C) = " + data.value(Float.class).toString());
                }
            });
        }
    )).continueWithTask(task -> {
        streamRoute = task.getResult();

        if(task.isFaulted())
            Log.e("boardReady", "*****************************1");

        return timerModule.scheduleAsync(TEMP_SAMPLE_PERIOD, false, tempsensor::read);
    }).continueWithTask(task -> {
        if(task.isFaulted()) {
            Log.e("boardReady", "*****************************2");
            Log.e("boardReady", task.getError().getMessage());
        }

        scheduledTask = task.getResult();
        scheduledTask.start();

        return null;
    });
}

this is what log says 

E/boardReady: *****************************2

E/boardReady: Attempt to invoke interface method 'bolts.Task com.mbientlab.metawear.module.Timer.scheduleAsync(int, boolean, com.mbientlab.metawear.CodeBlock)' on a null object reference

Eric

Did you initialize the timerModule variable?

almartinez

private Timer timerModule;

you mean that variable? because private timerModule doesn't work. Thanks for answering.

Eric

Yes, that variable.  The error message says "null object reference" so you need to initialize it before calling scheduleAsync.

almartinez

Ok, it's solved, thanks Eric.