蓝牙的使用

//蓝牙记得先添加了两个权限<uses-permission android:name="android.permission.BLUETOOTH" /><uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />public class MainActivity extends Activity {    private ListView listView;    private BluetoothAdapter defaultAdapter;    private ArrayList<BluetoothDevice> deviceList = new ArrayList<BluetoothDevice>();    private MyBluetoothAdapter myBluetoothAdapter;    private BroadcastReceiver receiver;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        listView = (ListView) findViewById(R.id.listView);        // 获取蓝牙适配对象        defaultAdapter = BluetoothAdapter.getDefaultAdapter();        // 如果蓝牙状态不可用        // 打开蓝牙设备        defaultAdapter.enable();        // 注册广播        registBluetoothReceiver();        listView.setOnItemClickListener(new OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> arg0, View arg1,                                    int position, long arg3) {                try {                    BluetoothDevice bluetoothDevice = deviceList.get(position);                    // 未配对，就去配对                    if (bluetoothDevice.getBondState() == BluetoothDevice.BOND_NONE) {                        String address = bluetoothDevice.getAddress();                        // 获取远程设备                        BluetoothDevice remoteDevice = defaultAdapter                                .getRemoteDevice(address);                        // 配对操作                        // 先获取字节码文件对象                        Class<BluetoothDevice> clz = BluetoothDevice.class;                        // 获取方法                        Method method = clz.getMethod("createBond", null);                        // 执行配对该方法                        method.invoke(remoteDevice, null);                    } else if (bluetoothDevice.getBondState() == bluetoothDevice.BOND_BONDED) {                        Intent intent = new Intent(MainActivity.this,                                ChatActivity.class);                        intent.putExtra("address", bluetoothDevice.getAddress());                        startActivity(intent);                    }                } catch (Exception e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }            }        });    }    /**     * 注册蓝牙广播     */    private void registBluetoothReceiver() {        // 定义一个广播接收器        receiver = new MyBluetoothReceiver();        // 创建一个意图过滤器        IntentFilter filter = new IntentFilter();        // 注册一个搜素到蓝牙的一个意图action        filter.addAction(BluetoothDevice.ACTION_FOUND);        // 添加一个action 监听配对状态改变的一个事件        filter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);        registerReceiver(receiver, filter);    }    public void search(View v) {        // 搜寻蓝牙设备 已配对和没有配对的设备        searchBondedDevices();        // 搜索未配对设备        searchUnBondedDevices();        // 展示设备        setAdapter();    }    /**     * 搜索未配对设备     */    private void searchUnBondedDevices() {        new Thread() {            public void run() {                // 如果当前正在搜素，先停止，开始本次搜索                if (defaultAdapter.isDiscovering()) {                    defaultAdapter.cancelDiscovery();                }                // 开始搜索，就可以搜索到未配对的设备                defaultAdapter.startDiscovery();            };        }.start();    }    /**     * 设置数据适配器     */    private void setAdapter() {        // 如果适配器为空，创建，设置适配器        if (myBluetoothAdapter == null) {            myBluetoothAdapter = new MyBluetoothAdapter(this, deviceList);            listView.setAdapter(myBluetoothAdapter);        } else {            // 刷新适配器            myBluetoothAdapter.notifyDataSetChanged();        }    }    /**     * 搜寻已经配对的设备     */    private void searchBondedDevices() {        Set<BluetoothDevice> bondedDevices = defaultAdapter.getBondedDevices();        for (BluetoothDevice bluetoothDevice : bondedDevices) {            //如果deviceList集合中不包含已经存在的蓝牙则记录            if (!deviceList.contains(bluetoothDevice))                deviceList.add(bluetoothDevice);        }    }    @Override    protected void onDestroy() {        super.onDestroy();        if (receiver != null) {            // 反注册广播            unregisterReceiver(receiver);            receiver = null;        }    }    // 接收所注册过的action的消息    class MyBluetoothReceiver extends BroadcastReceiver {        @Override        public void onReceive(Context context, Intent intent) {            // 获取事件类型            String action = intent.getAction();            // 获取蓝牙设备            BluetoothDevice bluetoothDevice = intent                    .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);            if (action.equals(BluetoothDevice.ACTION_FOUND)) {                // 发现蓝牙设备，发送了这样一个形式的广播                // sendBroadcast(intent);                // intent.putExtra(name, value);                // 获取到蓝牙设备                // 添加到一开始定义的集合中                if (!deviceList.contains(bluetoothDevice)) {                    deviceList.add(bluetoothDevice);                }                // 刷新数据适配器                setAdapter();            } else if (action.equals(BluetoothDevice.ACTION_BOND_STATE_CHANGED)) {                int bondState = bluetoothDevice.getBondState();                switch (bondState) {                    case BluetoothDevice.BOND_NONE:                        Toast.makeText(MainActivity.this, "配对失败", 0).show();                        break;                    case BluetoothDevice.BOND_BONDING:                        Toast.makeText(MainActivity.this, "正在配对", 0).show();                        break;                    case BluetoothDevice.BOND_BONDED:                        Toast.makeText(MainActivity.this, "配对成功", 0).show();                        // 重新搜索                        // searchBondedDevices();                        // searchUnBondedDevices();                        // 刷新适配器                        deviceList.remove(bluetoothDevice);                        deviceList.add(0, bluetoothDevice);                        setAdapter();                        break;                    default:                        break;                }            }        }    }}//自定义适配器public class MyBluetoothAdapter extends BaseAdapter {    private ArrayList<BluetoothDevice> deviceList;    private Context context;    public MyBluetoothAdapter(Context context,                              ArrayList<BluetoothDevice> deviceList) {        this.context = context;        this.deviceList = deviceList;    }    @Override    public int getCount() {        return deviceList.size();    }    @Override    public Object getItem(int position) {        return null;    }    @Override    public long getItemId(int position) {        return 0;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        View view = View.inflate(context, R.layout.device_item, null);        TextView tv_address = (TextView) view.findViewById(R.id.tv_address);        TextView tv_name = (TextView) view.findViewById(R.id.tv_name);        TextView tv_state = (TextView) view.findViewById(R.id.tv_state);        tv_address.setText(deviceList.get(position).getAddress());        tv_name.setText(deviceList.get(position).getName());        int bondState = deviceList.get(position).getBondState();        switch (bondState) {            case BluetoothDevice.BOND_NONE:                tv_state.setText("未配对");                tv_state.setTextColor(Color.BLACK);                break;            case BluetoothDevice.BOND_BONDING:                tv_state.setText("正在配对");                tv_state.setTextColor(Color.RED);                break;            case BluetoothDevice.BOND_BONDED:                tv_state.setText("已配对");                tv_state.setTextColor(Color.BLUE);                break;            default:                break;        }        return view;    }}