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Problem with attempt to invoke interface method

almartinezalmartinez
in Android 
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

Comments

  • EricEric
    Did you initialize the timerModule variable?
  • almartinezalmartinez
    private Timer timerModule;

    you mean that variable? because private timerModule doesn't work. Thanks for answering.
  • EricEric
    Yes, that variable.  The error message says "null object reference" so you need to initialize it before calling scheduleAsync.
  • almartinezalmartinez
    Ok, it's solved, thanks Eric.
This discussion has been closed.