Android - Bluetooth Connection Demo

You will get Final Output:

Introduction:

Bluetooth:The Android platform supports Bluetooth connection, which allows exchanging data with other Bluetooth devices. The application framework provides access to the Bluetooth functionality through the Android Bluetooth APIs connect to other Bluetooth devices.

All of the Bluetooth APIs is available in the Android Bluetooth package.

Here is a summary of the classes you will need to create as below:

In our example we are going to create an application which get the information about the Bluetooth connections is activates and deactivates Bluetooth.

Step 1 Check Bluetooth Connection

First we need check Bluetooth connection. So Create new class named Connections.

public class Connections {
 
    private static boolean state = false;
 
    public static boolean blueTooth() {
 
        BluetoothAdapter bluetooth = BluetoothAdapter.getDefaultAdapter();
        if (!bluetooth.isEnabled()) {
            System.out.println("Bluetooth is Disable...");
            state = true;
        } else if (bluetooth.isEnabled()) {
            String address = bluetooth.getAddress();
            String name = bluetooth.getName();
            System.out.println(name + " : " + address);
            state = false;
        }
        return state;
    }
 
}

Step 2 MainActivity.java file

Now when we got the response from the Connections class in our Main Activity with BT in Off state we get dialog for On BT.

Then we create new method into main activity class for the setting up all the Bluetooth information into Text View.

public class MainActivity extends Activity {
 
    private static final int REQUEST_ENABLE_BT = 12;
    private TextView out;
    private BluetoothAdapter adapter;
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
 
        out = (TextView) findViewById(R.id.tvBluetoothInfo);
        setBluetoothData();
 
        if (Connections.blueTooth()) {
            Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
            startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
        }
    }
 
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // TODO Auto-generated method stub
        super.onActivityResult(requestCode, resultCode, data);
        out.setText("");
        setBluetoothData();
    }
 
    private void setBluetoothData() {
 
        // Getting the Bluetooth adapter
        adapter = BluetoothAdapter.getDefaultAdapter();
        out.append("\nAdapter: " + adapter.toString() + "\n\nName: " + adapter.getName() + "\nAddress: " + adapter.getAddress());
 
        // Check for Bluetooth support in the first place
        // Emulator doesn't support Bluetooth and will return null
 
        if (adapter == null) {
            Toast.makeText(this, "Bluetooth NOT supported. Aborting.",
            Toast.LENGTH_LONG).show();
        }
 
        // Starting the device discovery
        out.append("\n\nStarting discovery...");
        adapter.startDiscovery();
        out.append("\nDone with discovery...\n");
 
        // Listing paired devices
        out.append("\nDevices Pared:");
        Set<BluetoothDevice> devices = adapter.getBondedDevices();
        for (BluetoothDevice device : devices) {
            out.append("\nFound device: " + device.getName() + " Add: " + device.getAddress());
        }
    }
}

For More Details visit following links:

• http://developer.android.com/reference/android/bluetooth/BluetoothAdapter.html

I hope you enjoy this tutorial and it would be helpful to you.

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An entrepreneur who has founded 2 flourishing software firms in 7 years, Tejas is keen to understand everything about gaming - from the business dynamics to awesome designs to gamer psychology. As the founder-CEO of a company that has released some very successful games, he knows a thing or two about gaming. He shares his knowledge through blogs and talks that he gets invited to.