Continuously reading a variable

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1

I am trying to read a variable every 5 seconds. So far I can read the variable on a button press but I want to continuously read the variable every 5 seconds without a button press.

Here is what I have so far:

protected void readRange(){
Async.executeAsync(ParticleCloudSDK.getCloud(), new Async.ApiWork<ParticleCloud, Object>() {
@Override
public Object callApi(@NonNull ParticleCloud ParticleCloud) throws ParticleCloudException, IOException {

            ParticleDevice device = ParticleCloud.getDevice(getIntent().getStringExtra(ARG_DEVICEID));
            Object variable;

            try {
                variable = device.getDoubleVariable("range");

            } catch (ParticleDevice.VariableDoesNotExistException e) {
                Toaster.l(ReadSensorActivity.this, e.getMessage());
                variable = -1;
            }

            return variable;
        }

        @Override
        public void onSuccess(@NonNull Object i) { // this goes on the main thread
            range.setText(i.toString()+" in");
        }

        @Override
        public void onFailure(@NonNull ParticleCloudException e) {
            e.printStackTrace();
        }
    });
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_read_sensor);
    range = (TextView) findViewById(R.id.range);
    button = (Button) findViewById(R.id.readButton);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            readRange();
        }
    });
}