Android Open Source - AndroidBluetoothImplementation Bluetooth Handler

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Back to project page AndroidBluetoothImplementation.

License

The source code is released under:

GNU General Public License

Java Source Code

package fr.oversimple.bluetooth;
/*from  w  w  w  .  j a v  a2  s .c  o m*/
import java.util.ArrayList;
import java.util.List;
import java.util.Set;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;

/**
 * 
 * This class has been made to handle efficiently the Bluetooth manager
 * 
 * Add the following permissions to the AndroidManifest.xml file :
 * <uses-permission android:name="android.permission.BLUETOOTH"/>
 * <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
 * 
 * @author Julien Hatin
 * @version 1.0
 * 
 */
public class BluetoothHandler extends BroadcastReceiver {

  /* private variable */
  private Context context;
  /* The list of device discivered by this BluetoothHandler */
  private List<BluetoothDevice> devices;

  private BluetoothAdapter bluetoothAdapter;
  private BluetoothDeviceDetectedEventListener bluetoothDeviceDetectedEventListener;

  public BluetoothHandler(Context context) {
    this.context = context;
    devices = new ArrayList<BluetoothDevice>();
    bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
  }

  /**
   * Start the Bluetooth scan add a
   * {@link BluetoothDeviceDetectedEventListener} with the
   * {@link setBluetoothDeviceDetectedEventListener} to be informed of device
   * detection
   */
  public void startScan() {
    IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
    context.registerReceiver(this, filter);
    bluetoothAdapter.startDiscovery();
  }

  /**
   * Stop the Bluetooth scan. Don't forget to call in the onDestroy method of
   * your activity for example
   */
  public void stopScan() {
    bluetoothAdapter.cancelDiscovery();
    context.unregisterReceiver(this);
  }

  /**
   * 
   * Make your device visible to other devices for the specified amount of
   * time
   * 
   * @param time
   *            the time your device will be visible
   */
  public void beDiscoverable(int time) {
    Intent discoverableIntent = new Intent(
        BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
    discoverableIntent.putExtra(
        BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, time);
    context.startActivity(discoverableIntent);
  }

  /**
   * 
   * @return true if the Bluetooth is present on the device
   */
  public boolean isBluetoothPresentOnDevice() {
    if (null == bluetoothAdapter) {
      return false;
    } else {
      return true;
    }
  }

  /**
   * 
   * @return true is the Bluetooth is activatd on the device
   */
  public boolean isBluetoothEnabled() {
    if (isBluetoothPresentOnDevice()) {
      return bluetoothAdapter.isEnabled();
    } else {
      return false;
    }
  }

  /**
   * Return the list of the devices already paired your device
   * 
   * @return the list of the devices already paired your device
   */
  public Set<BluetoothDevice> getAllreadyBoundedDevices() {
    return bluetoothAdapter.getBondedDevices();
  }

  /**
   * Return the devices discovered since the {@link startScan()} method have
   * been called
   * 
   * @return all the device discovered
   */
  public List<BluetoothDevice> getDiscoveredDevices() {
    return devices;
  }

  /**
   * Set a {@link BluetoothDeviceDetectedEventListener}. This listener is
   * unique and will be called every time a new device is discovered;
   * 
   * @param eventListener
   */
  public void setBluetoothDeviceDetectedEventListener(
      BluetoothDeviceDetectedEventListener eventListener) {
    bluetoothDeviceDetectedEventListener = eventListener;
  }

  @Override
  public void onReceive(Context context, Intent intent) {
    String action = intent.getAction();
    if (BluetoothDevice.ACTION_FOUND.equals(action)) {
      BluetoothDevice device = (BluetoothDevice) intent
          .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
      
      if(!devices.contains(device)) {
        devices.add(device);
      }

      if (null != bluetoothDeviceDetectedEventListener) {
        bluetoothDeviceDetectedEventListener.deviceDetected();
      }

    }
  }

}

Java Source Code List

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