Can someone help me point out the where's the error

BLE Beacons
1

Hi, can someone help me point the error I really have no idea why is it underline?

package sg.edu.nyp.stickers.activities;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView; 
import android.widget.ListView;
import android.widget.Toast;

import com.estimote.sdk.BeaconManager;
import com.estimote.sdk.Nearable;

import java.util.Collections;
import java.util.List;

import sg.edu.nyp.stickers.R;
import sg.edu.nyp.stickers.adapter.NearableListAdapter;

/**
 * Displays list of found nearables sorted by RSSI.
 * Starts new activity with selected nearable if activity was provided.
 */
public class ListNearablesActivity extends BaseActivity {
private static final String TAG = ListNearablesActivity.class.getSimpleName();

public static final String EXTRAS_TARGET_ACTIVITY = "extrasTargetActivity";
public static final String EXTRAS_NEARABLE = "extrasNearable";

private static final int REQUEST_ENABLE_BT = 1234;

private BeaconManager beaconManager;
private NearableListAdapter adapter;

@Override protected int getLayoutResId() {
 return R.layout.main;
}

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Configure device list.
    adapter = new NearableListAdapter(this);
    ListView list = (ListView) findViewById(R.id.device_list);
    list.setAdapter(adapter);
   list.setOnItemClickListener(createOnItemClickListener());

    //Initialize Beacon Manager
     beaconManager = new BeaconManager(this);
   }

  @Override
  protected void onDestroy() {
    beaconManager.disconnect();
    super.onDestroy();
  }

  @Override
  protected void onStart() {
    super.onStart();

    // Check if device supports Bluetooth Low Energy.
    if (!beaconManager.hasBluetooth()) {
      Toast.makeText(this, "Device does not have Bluetooth Low Energy",     Toast.LENGTH_LONG).show();
      return;
    }

    // If Bluetooth is not enabled, let user enable it.
    if (!beaconManager.isBluetoothEnabled()) {
      Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
      startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
    } else {
      connectToService();
    }
  }

   @Override
  protected void onStop() {
    beaconManager.disconnect();
    super.onStop();
  }

  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_ENABLE_BT) {
      if (resultCode == Activity.RESULT_OK) {
        connectToService();
      } else {
        Toast.makeText(this, "Bluetooth not enabled", Toast.LENGTH_LONG).show();
        toolbar.setSubtitle("Bluetooth not enabled");
      }
    }
    super.onActivityResult(requestCode, resultCode, data);
  }

   private void connectToService() {
    toolbar.setSubtitle("Scanning...");
    adapter.replaceWith(Collections.<Nearable>emptyList());

    beaconManager.setNearableListener(new BeaconManager.NearableListener() {
      @Override public void onNearablesDiscovered(List<Nearable> nearables) {
        toolbar.setSubtitle("Found nearables: " + nearables.size());
        adapter.replaceWith(nearables);
      }
    });

    beaconManager.connect(new BeaconManager.ServiceReadyCallback() {
      @Override
      public void onServiceReady() {
        beaconManager.startNearableDiscovery();
      }
    });
  }



 private AdapterView.OnItemClickListener createOnItemClickListener() {
          return new AdapterView.OnItemClickListener() {
            @Override
           public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
              if (getIntent().getStringExtra(EXTRAS_TARGET_ACTIVITY) != null) {
                try {
                   Class<?> clazz =        Class.forName(getIntent().getStringExtra(EXTRAS_TARGET_ACTIVITY));
                   Intent intent = new Intent(ListNearablesActivity.this, clazz);
                   intent.putExtra(EXTRAS_NEARABLE, adapter.getItem(position));
                   startActivity(intent);
                  } catch (ClassNotFoundException e) {
                   Log.e(TAG, "Finding class by name failed", e);
                 }
               }
               }
            };
     beaconManager = new BeaconManager(this);
     beaconManager.setNearableListener(new BeaconManager.NearableListener() {
      @Override
       public void onNearablesDiscovered(List<Nearable> nearables, int position){
        for (Nearable nearable : nearables) {
           if (nearable.identifier.equals("065473d63cd9d687") && nearable.isMoving) {
             if (getIntent().getStringExtra(EXTRAS_TARGET_ACTIVITY) != null) {
               try {
                Class<?> clazz = Class.forName(getIntent().getStringExtra(EXTRAS_TARGET_ACTIVITY));
                 Intent intent = new Intent(ListNearablesActivity.this, clazz);
                intent.putExtra(EXTRAS_NEARABLE, adapter.getItem(position));
                 startActivity(intent);
               } catch (ClassNotFoundException e) {
                 Log.e(TAG, "Finding class by name failed", e);
                }
              }
            }
          }
         }
     });

    }

  }
2

You haven’t provided any error messages, or even specified what’s underlined. Please try to be more specific—it’ll allow us to help you faster!

Also, let’s continue the discussion in the original topic: