Android蓝牙2.0开发

因项目需要，做一个与2.0蓝牙模块连接的Demo，在此记录一下

1.先注册个广播，来接收一下蓝牙的状态

MyBroadCastRevciver broadcastReceiver = null;
public void registerBroadcast(){
    broadcastReceiver = new MyBroadCastRevciver();
    IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction(BluetoothDevice.ACTION_FOUND);
    intentFilter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
    intentFilter.addAction(BluetoothDevice.ACTION_ACL_CONNECTED);
    intentFilter.addAction(BluetoothDevice.ACTION_ACL_DISCONNECTED);
    registerReceiver(broadcastReceiver, intentFilter);
}


private String mac;
class MyBroadCastRevciver extends BroadcastReceiver {

        @Override
        public void onReceive(Context context, Intent intent) {
            switch (intent.getAction()) {
                case BluetoothDevice.ACTION_FOUND:
                    Log.d("TAG", "找到蓝牙");
                    BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                 mac = device.getAddress();
                    break;
                case BluetoothDevice.ACTION_BOND_STATE_CHANGED:
                    device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                    switch (device.getBondState()) {
                        case BluetoothDevice.BOND_NONE:
                            Log.d("TAG", "取消配对");
                          
                            break;
                        case BluetoothDevice.BOND_BONDING:
                            Log.d("TAG", "配对中");
                            break;
                        case BluetoothDevice.BOND_BONDED:
                            Log.d("TAG", "配对成功");
                            break;
                    }
                    break;
                case BluetoothDevice.ACTION_ACL_CONNECTED:
                    Log.d("TAG", "连接");
                    break;
                case BluetoothDevice.ACTION_ACL_DISCONNECTED:
                    Log.d("TAG", "断开");
                    break;
                default:
                    break;
            }
        }
    }

2.获取BluetoothAdapter并初始化蓝牙，此类是操作本地蓝牙的适配器

BluetoothAdapter defaultAdapter = BluetoothAdapter.getDefaultAdapter();
if (defaultAdapter == null ）{
    Log.d("TAG","此设备不支持蓝牙");
}
if(!defaultAdapter.isEnabled()){
    //蓝牙未打开，开启蓝牙
  activity.startActivityForResult(new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE),1);
}  

3.搜索蓝牙

     /**
     * 搜索蓝牙
     */
    public void searchBlueTooth() {
        if (defaultAdapter != null) {
            Log.d("TAG", "搜索蓝牙");
            if (！defaultAdapter.isDiscovering()) {
                defaultAdapter.startDiscovery();
            }
        }
    }

4.找到目标蓝牙后需要先配个对

private void bondDevice(){
    BluetoothDevice device = null;
      if (defaultAdapter != null) {
          device = defaultAdapter.getRemoteDevice(mac);
      }
      if (device.getBondState() == BluetoothDevice.BOND_BONDED) {
          Log.d("TAG", "已配对");            
      } else {
          Log.d("TAG", "配对");
          Method method = BluetoothDevice.class.getMethod("createBond");
          method.invoke(device);
      }

}

5.配对后就可以连接了

class BlueToothThread extends Thread {
        BluetoothDevice device;
        BluetoothSocket socket;
        public BlueToothThread(BluetoothDevice device) {
            this.device = device;
        }

        @Override
        public void run() {
            try {
                Log.d("TAG", "连接蓝牙");
                socket = device.createRfcommSocketToServiceRecord(ECG_UUID);
                //在连接过程中，会出现java.io.IOException: read failed, socket might                    closed or timeout, read ret: -1,目前还没什么找到太好的解决方案
                socket.connect();
                InputStream inputStream = null;
                OutputStream outputStream = null;
                if (socket != null) {
                    Log.d("TAG", "获取输入流");
                    inputStream = socket.getInputStream();
                    outputStream = socket.getOutputStream();
                }
                byte[] bytes = new byte[100];
                if (inputStream != null) {
                    while (true) {
                        int read = inputStream.read(bytes);
                    }
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }