連接 藍牙HC - 05 模塊 進行讀寫操作

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1. 開啟藍牙進行連接

//藍牙private BluetoothAdapter bluetoothAdapter;private Set<BluetoothDevice> pairedDevices;private static UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");private OutputStream mmOutStream;private InputStream mmInStream;private BluetoothSocket mmSocket;private byte[] mmBuffer; // mmBuffer store for the stream //建立藍牙連接public void on() {bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();mmSocket = null;if (!bluetoothAdapter.isEnabled()) {Intent turnOn = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);startActivityForResult(turnOn, 0);Toast.makeText(getApplicationContext(), "Turned on", Toast.LENGTH_LONG).show();} else {Toast.makeText(getApplicationContext(), "Already on", Toast.LENGTH_LONG).show();}}

2. 建立sockat通道

try {String name = "CONNECTED";byte[] bytes = name.getBytes();mmOutStream.write(bytes);} catch (IOException e) {Toast.makeText(getApplicationContext(), "Connecting...", Toast.LENGTH_LONG).show();connector();}

connector方法

/*** 初始化文件流 開啟Socket連接*/public void connector() {OutputStream tmpOut = null;InputStream tmpIn = null;// Get list of paired devicesBluetoothSocket tmp = null;String dname;pairedDevices = bluetoothAdapter.getBondedDevices();BluetoothDevice device = null;if (pairedDevices.size() > 0) {for (BluetoothDevice bt : pairedDevices) {Log.d("TAG name", "已連接：" + bt.getName());dname = bt.getName();if (dname.equals("HC-05")) {textinfo1.setText("設備名：" + dname);textinfo2.setText("地址：" + bt.getAddress());device = bt;Log.d("TAG", "HC-05設備已讀取到!!!");Toast.makeText(getApplicationContext(), "HC-05設備已讀取到!!!" + device.getName(), Toast.LENGTH_LONG).show();} else {Log.d("TAG", "HC-05 設備未讀取到");}}try {// MY_UUID is the app's UUID string, also used by the client code.tmp = device.createRfcommSocketToServiceRecord(MY_UUID);} catch (IOException e) {Log.d("TAG", "Socket's listen() method failed", e);Toast.makeText(getApplicationContext(), "Error 1 Socket連接失敗", Toast.LENGTH_LONG).show();}mmSocket = tmp;bluetoothAdapter.cancelDiscovery();try {// Connect to the remote device through the socket. This call blocks// until it succeeds or throws an exception.mmSocket.connect();Log.d("TAG", "Socket connected!!!!!");Toast.makeText(getApplicationContext(), "Connected", Toast.LENGTH_LONG).show();} catch (IOException connectException) {}try {tmpIn = mmSocket.getInputStream();} catch (IOException e) {Log.e(TAG, "Error occurred when creating input stream", e);}try {tmpOut = mmSocket.getOutputStream();} catch (IOException e) {Log.e(TAG, "Error occurred when creating output stream", e);Toast.makeText(getApplicationContext(), "Error 2", Toast.LENGTH_LONG).show();}mmOutStream = tmpOut;mmInStream = tmpIn;} else {Log.d("TAG", "No devices");Toast.makeText(getApplicationContext(), "HC-05 is not pared", Toast.LENGTH_LONG).show();}}

3. 寫入數據

/*** 寫入數據** @param v*/public void write(View v) {String name =“要發送的數據”; byte[] bytes = name.getBytes();Log.e("TAG", "bytes : " + name);try {mmOutStream.write(bytes);} catch (IOException e) {e.printStackTrace();Toast.makeText(getApplicationContext(), "發送失敗", Toast.LENGTH_LONG).show();}}

4. 接受數據

/*** 接受數據*/Thread th = new Thread(new Runnable() {public void run() {mmBuffer = new byte[4096];int numBytes;while (true) {try {if (mmInStream.available() > 2) {Log.d("TAG", "數據正常：" + "mmInStream.available()>2 ");// Read from the InputStream.numBytes = mmInStream.read(mmBuffer);final String readMessage = new String(mmBuffer, 0, numBytes);runOnUiThread(new Runnable() {@Overridepublic void run() {textViewInfo.setText(readMessage);}});Log.d("TAG", "readMessage:" + readMessage);} else {SystemClock.sleep(100);Log.d("TAG", "No Data");}} catch (IOException e) {Log.d("TAG", "連接中斷，流斷開", e);break;}}}});

5. 關閉連接

public void off(View v) {bluetoothAdapter.disable();Toast.makeText(getApplicationContext(), "關閉連接", Toast.LENGTH_LONG).show();}

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PS:藍牙權限自己處理

總結

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