Estimote android没有出现在oncreate上

Question

我在github中使用这样的代码：

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    final TextView rangeLabel = (TextView) findViewById(R.id.range_label);
    final TextView beaconMacAddressLabel = (TextView) findViewById(R.id.beacon_mac_address_label);
    final TextView beaconUuidLabel = (TextView) findViewById(R.id.beacon_uuid_label);
    final TextView beaconVersionLabel = (TextView) findViewById(R.id.beacon_major_minor_label);
    final TextView beaconStatsLabel = (TextView) findViewById(R.id.beacon_stats_label);

    rangeLabel.setTextColor(Color.BLACK);
    rangeLabel.setText(R.string.question_mark);
    region = new Region("regionid", null, null, null);

    beaconManager = new BeaconManager(this);
    beaconManager.setRangingListener(new RangingListener() {
        @Override
        public void onBeaconsDiscovered(Region region, final List<Beacon> beacons) {
            runOnUiThread(new Runnable() {

                  @Override
                  public void run() {
                      if (!beacons.isEmpty()) {

                          Beacon closestBeacon = beacons.get(0);

                          beaconMacAddressLabel.setText(getString(R.string.mac_address) + " : " + closestBeacon.getMacAddress());
                          beaconUuidLabel.setText(closestBeacon.getProximityUUID());
                          beaconVersionLabel.setText(getString(R.string.major) + ": "+closestBeacon.getMajor() +
                                                     "   " + getString(R.string.minor) + ": " + closestBeacon.getMinor());

                          beaconStatsLabel.setText(getString(R.string.power) + ": " +
                                                closestBeacon.getMeasuredPower() +
                                                " " +
                                                getString(R.string.dbm) +
                                                " |  " +
                                                getString(R.string.rssi) + 
                                                ": " + closestBeacon.getRssi());

                          double accuracy = Utils.computeAccuracy(closestBeacon);

                          switch (Utils.proximityFromAccuracy(accuracy)) {
                            case FAR:
                                rangeLabel.setText(R.string.cold);
                                rangeLabel.setTextColor(getResources().getColor(R.color.cold_colour));
                                rangeLabel.setBackgroundResource(R.drawable.cold_indicator_background);
                                break;
                            case NEAR:
                                rangeLabel.setText(R.string.warm);
                                rangeLabel.setTextColor(getResources().getColor(R.color.warm_colour));
                                rangeLabel.setBackgroundResource(R.drawable.warm_indicator_background);
                                break;
                            case IMMEDIATE:
                                rangeLabel.setText(R.string.hot);
                                rangeLabel.setTextColor(getResources().getColor(R.color.hot_colour));
                                rangeLabel.setBackgroundResource(R.drawable.hot_indicator_background);
                                break;
                            case UNKNOWN:
                                rangeLabel.setText(R.string.question_mark);
                                rangeLabel.setTextColor(Color.BLACK);
                                rangeLabel.setBackgroundResource(R.drawable.indicator_background);
                                break;

但是在运行之后，只有tittle，app name和rangeLabel出现在屏幕上。 不知道为什么其他textview如beaconstatslabel ...没有出现。任何人都知道为什么，请帮助我。谢谢大家