JLechman DeviceList.java mod

package com.led.GUI;

import android.content.Intent;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.Set;


public class DeviceList extends ActionBarActivity   //main class
{
    //GUI objects
    Button btnPaired;
    ListView devicelist;
    //Bluetooth instance variables
    private BluetoothAdapter myBluetooth = null;
    private Set<BluetoothDevice> pairedDevices;
    public static String EXTRA_ADDRESS = "device_address";

    @Override
    protected void onCreate(Bundle savedInstanceState)  //when the GUI instance (activity_device_list) is created
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_device_list); //set the current view to device list xml

        //initializing GUI objects, basically linking them with the xml file objects
        btnPaired = (Button)findViewById(R.id.button);
        devicelist = (ListView)findViewById(R.id.listView);

        //if the phone has bluetooth, get the adapter
        myBluetooth = BluetoothAdapter.getDefaultAdapter();

        if(myBluetooth == null) //if there is no bluetooth device on the phone, technically dont have to deal with this but just in case my app will be used on another deivce
        {

            Toast.makeText(getApplicationContext(), "Bluetooth Device Not Available", Toast.LENGTH_LONG).show();    //notify user

            //finish apk
            finish();
        }
        else if(!myBluetooth.isEnabled())
        {
                //Ask to the user turn the bluetooth on if the bluetooth is not already on for the phone
                Intent turnBTon = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
                startActivityForResult(turnBTon,1);
        }

        btnPaired.setOnClickListener(new View.OnClickListener() {   //actionlistener for the only button in this view
            @Override
            public void onClick(View v)
            {
                pairedDevicesList();
            }
        });

    }

    private void pairedDevicesList()
    {
        pairedDevices = myBluetooth.getBondedDevices();
        ArrayList list = new ArrayList();   //creating a list to store avilable devices

        if (pairedDevices.size()>0) //if there is at least 1 device avilable
        {
            for(BluetoothDevice bt : pairedDevices)
            {
                list.add(bt.getName() + "\n" + bt.getAddress()); //Get the device's name and its address
            }
        }
        else    //no devices avilable
        {
            Toast.makeText(getApplicationContext(), "No Paired Bluetooth Devices Found.", Toast.LENGTH_LONG).show();    //notify user
        }

        final ArrayAdapter adapter = new ArrayAdapter(this,android.R.layout.simple_list_item_1, list);      //variable to hold said list
        devicelist.setAdapter(adapter);
        devicelist.setOnItemClickListener(myListClickListener); //Method called when the device from the list is clicked

    }

    private AdapterView.OnItemClickListener myListClickListener = new AdapterView.OnItemClickListener()
    {
        public void onItemClick (AdapterView<?> av, View v, int arg2, long arg3)
        {
            // Get the device MAC address, the last 17 chars in the View
            String info = ((TextView) v).getText().toString();
            String address = info.substring(info.length() - 17);

            // Make an intent to start next activity which is motorControl
            Intent i = new Intent(DeviceList.this, motorControl.class);

            //Change the activity to the intended activity (motorControl)
            i.putExtra(EXTRA_ADDRESS, address); //this will be received at motorControl (class) Activity
            startActivity(i);
        }
    };


    @Override
    public boolean onCreateOptionsMenu(Menu menu)   //when the avilable device list is created, inflate it (pop up)
    {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_device_list, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. (when a user selects a bluetooth device from the list)
        int id = item.getItemId();

        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}