android蓝牙和串口模块的通信

android蓝牙和串口模块的通信

最近一段时间研究了下android端和蓝牙串口模块间的通信，废话不多说，直接屡一屡思路和撸代码

手机端蓝牙的搜索

和串口模块间的配对

最后就是数据的传输了

蓝牙的搜索

1、通过广播方式接收蓝牙的搜索结果，注册相应的广播

IntentFilter filter = new IntentFilter();
filter.addAction(BluetoothDevice.ACTION_FOUND);
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
this.registerReceiver(mReceiver, filter);

2、写一个广播接收器，获取周围的蓝牙设备，正常情况发现蓝牙时需判断该蓝牙模块是否已经配对，若已配对，则忽略。（但由于公司应用的要求，所以在这我省略了，只是多加这句话而已 device.getBondState() != BluetoothDevice.BOND_BONDED）

private final BroadcastReceiver mReceiver = new BroadcastReceiver(){
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
falgs=0;
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
if(newDevicesAdapter.getPosition(device.getName() +
"\n" + device.getAddress())==-1){
newDevicesAdapter.add(device.getName() + "\n" +
device.getAddress());
newDevicesAdapter.notifyDataSetChanged();
}

} else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
setProgressBarIndeterminateVisibility(false);
setTitle(R.string.select_paire);
if (newDevicesAdapter.getCount() == 0) {
falgs=1;
newDevicesAdapter.add(getResources()
.getText(R.string.no_paire).toString());
}
}
}

};

注意：蓝牙搜索和配对前先判断手机是否支持蓝牙并且打开

private final BluetoothAdapter mblueAdapter=BluetoothAdapter.getDefaultAdapter();
if(mblueAdapter==null){ //表示手机不支持蓝牙设备 }
if(!mblueAdapter.isEnabled()){
Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableIntent, ScanActivity.REQUEST_ENABLE_BT); //请求完成后在onActivityResult作出相应的操作
}

3、开始蓝牙的搜索，先判断是否处于搜索状态

if(bluetoothAdapter.isDiscovering()){
bluetoothAdapter.cancelDiscovery();
}
bluetoothAdapter.startDiscovery();

4、蓝牙搜索完成后，就是蓝牙的连接

//先绑定蓝牙 BluetoothDevice dev=mblueAdapter.getRemoteDevice(address);
public boolean startService(BluetoothDevice device){

if (connectThread != null && connectThread.isAlive()) {
return true;
}
//获取蓝牙实例   判断机器是否支持蓝牙功能
final BluetoothAdapter mBluetoothAdapter = BluetoothAdapter
.getDefaultAdapter();
if (mBluetoothAdapter == null) {
MainActivity.getShowToast("This device does not support bluetooth").show();
stopSelf();
return false;
}

//判断蓝牙是否开启
if (!mBluetoothAdapter.isEnabled()) {
mHandler.obtainMessage(10).sendToTarget();
stopSelf();
return false;
}
//下面则是连接蓝牙并且实现数据的传输
connectThread=new BluetoothConnThread(mHandler,device);
new ObdReaderServiceWorkerThread(connectThread).start();
return true;
}

5、下面是connectThread线程里面的部分代码

UUID MY_UUID = UUID
.fromString("00001101-0000-1000-8000-00805F9B34FB");

@Override
public void run() {
//连接的时候停止搜索，防止资源消耗
BluetoothAdapter.getDefaultAdapter().cancelDiscovery();
try {
socket = mDevice
.createInsecureRfcommSocketToServiceRecord(MY_UUID);
//用socket打开输入输出流
socket.connect();
in=socket.getInputStream();
out=socket.getOutputStream();
} catch (Exception ex) {
try {
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
//发送连接失败消息
serviceHandler.obtainMessage(BluetoothTools.MESSAGE_CONNECT_ERROR)
.sendToTarget();
return;
}
//发送连接成功消息，
serviceHandler.obtainMessage(BluetoothTools.MESSAGE_CONNECT_SUCCESS).sendToTarget();
mInput=new InputThread(in, serviceHandler);
runReadData(mInput);
while(mInput.isAlive()){
try {
sleep(500);
} catch (InterruptedException e) {
e.printStackTrace();
}
}

上面所写都是项目中的部分代码，时间关系来不及整理，可能会有点错乱，大家多多包涵，这是鄙人第一次写博客，有错的，和不够详细的大家可以多多拍砖………………..一起学习。