Android Open Source - MakeWithMotoSampleApp Simple B T

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.makewithmoto.bt;
//w  ww .jav a2 s  .  c  o  m
import java.util.Vector;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.Intent;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.widget.Toast;

public class SimpleBT {
  private static final String TAG = "BT";

  // Intent request codes
  private static final int REQUEST_CONNECT_DEVICE = 1;
  private static final int REQUEST_ENABLE_BT = 2;

  // Message types sent from the BluetoothService Handler
  public static final int MESSAGE_STATE_CHANGE = 1;
  public static final int MESSAGE_READ = 2;
  public static final int MESSAGE_WRITE = 3;
  public static final int MESSAGE_DEVICE_NAME = 4;
  public static final int MESSAGE_TOAST = 5;

  // State variables
  private boolean paused = false;
  private boolean connected = false;
  
  private BluetoothAdapter mBluetoothAdapter = null;
  // Member object for the Bluetooth services
  private BluetoothSerialService mBluetoothService = null;
  
  Vector<SimpleBTListener> listeners = new Vector<SimpleBT.SimpleBTListener>();

  
  private Activity ac; 
  
  public interface SimpleBTListener {

    public void onConnected(); 
    public void onMessageReceived(String cmd, String data);
    public void onRawDataReceived(final byte[] buffer, final int size);

  }

  public SimpleBT(Activity ac) {
    this.ac = ac;
    // Get local Bluetooth adapter
    mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
    
  }

  private void setupUserInterface() {
    Log.d(TAG, "setupUserInterface()");

    // Initialize the BluetoothService to perform Bluetooth connections
    mBluetoothService = new BluetoothSerialService(mHandler);
  }

  // The Handler that gets information back from the BluetoothService
  private final Handler mHandler = new Handler() {
    @Override
    public void handleMessage(Message msg) {
      switch (msg.what) {
      case MESSAGE_STATE_CHANGE:
        Log.i(TAG, "MESSAGE_STATE_CHANGE: " + msg.arg1);
        switch (msg.arg1) {
        case BluetoothSerialService.STATE_CONNECTED:
          // connected = true;
          // mTitle.setText(mConnectedDeviceName);
          break;
        case BluetoothSerialService.STATE_CONNECTING:
          // mTitle.setText("Connecting");
          break;
        case BluetoothSerialService.STATE_NONE:
          connected = false;
          // mTitle.setText("Not connected");
          break;
        }
        break;
      case MESSAGE_WRITE:
        byte[] writeBuf = (byte[]) msg.obj;
        // construct a string from the buffer
        String writeMessage = new String(writeBuf);
        // mConversationArrayAdapter.add(">>> " + writeMessage);
        Log.d(TAG, "written = '" + writeMessage + "'");
        break;
      case MESSAGE_READ:
        if (paused)
          break;
        byte[] readBuf = (byte[]) msg.obj;
        // construct a string from the valid bytes in the buffer
        String readMessage = new String(readBuf, 0, msg.arg1);

        // TODO here is where we get the BT data
        Log.d(TAG, "received " + readMessage);

        // mConversationArrayAdapter.add(readMessage);
        break;
      case MESSAGE_DEVICE_NAME:
        // save the connected device's name
        // mConnectedDeviceName = msg.getData().getString(DEVICE_NAME);
        Toast.makeText(ac.getApplicationContext(), "Connected",
            Toast.LENGTH_SHORT).show();
        break;
      case MESSAGE_TOAST:
        // Toast.makeText(getApplicationContext(),
        // msg.getData().getString(TOAST),
        // Toast.LENGTH_SHORT).show();
        break;
      }
    }
  };

  public void startDeviceListActivity() {
    Intent serverIntent = new Intent(ac.getApplicationContext(), DeviceListActivity.class);
    ac.startActivityForResult(serverIntent, REQUEST_CONNECT_DEVICE);
  }

  public void start() {

    // If BT is not on, request that it be enabled.
    // setupUserInterface() will then be called during onActivityResult
    if (!mBluetoothAdapter.isEnabled()) {
      Intent enableIntent = new Intent(
          BluetoothAdapter.ACTION_REQUEST_ENABLE);
      ac.startActivityForResult(enableIntent, REQUEST_ENABLE_BT);
      // Otherwise, setup the Bluetooth session
    } else {
      if (mBluetoothService == null)
        setupUserInterface();
    }    
  }

  public void destroy() {

    if (mBluetoothService != null)
      mBluetoothService.stop();    
  }

  public void result(int requestCode, int resultCode, Intent data) {
    switch (requestCode) {
    case REQUEST_CONNECT_DEVICE:
      // When DeviceListActivity returns with a device to connect
      if (resultCode == ac.RESULT_OK) {
        // Get the device MAC address
        String address = data.getExtras().getString(
            DeviceListActivity.EXTRA_DEVICE_ADDRESS);
        // Get the BLuetoothDevice object
        BluetoothDevice device = mBluetoothAdapter
            .getRemoteDevice(address);
        // Attempt to connect to the device
        mBluetoothService.connect(device);
      }
      break;
    case REQUEST_ENABLE_BT:
      // When the request to enable Bluetooth returns
      if (resultCode == ac.RESULT_OK) {
        // Bluetooth is now enabled, so set up a Bluetooth session
        setupUserInterface();
      } else {
        // User did not enable Bluetooth or an error occurred
        Log.d(TAG, "BT not enabled");
        Toast.makeText(ac.getApplicationContext(), "BT not enabled, leaving",
            Toast.LENGTH_SHORT).show();
        
        //TODO show error
        //finish();
      }
    }    
  }

  public void addListener(SimpleBTListener simpleBTListener) {
    listeners.add(simpleBTListener);    
  } 
  
  public void removeListener(SimpleBTListener simpleBTListener) {
    listeners.remove(simpleBTListener);
  }

  public void send(String string) {
    mBluetoothService.write(string.getBytes());
    
  }

}

Java Source Code List

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