如何使用蓝牙和Android发送字符

Question

今天我正在使用蓝牙，现在我可以打开它并连接到我的机器人，但我找不到如何向我的机器人发送一封信（如“w”）。一些示例代码会是什么样的呢？

所以，我再试一次。单击按钮时应用程序失败。

 private OutputStream outStream = null;
 private BluetoothSocket btSocket = null;
 private BluetoothDevice device = null;
 static String address = "00:12:02:09:05:21";
 private static final UUID MY_UUID =
          UUID.fromString("fa87c0d0-afac-11de-8a39-0800200c9a66");
 BluetoothAdapter myBTadapter;

check.setOnClickListener(new View.OnClickListener() {   
@Override
public void onClick(View v) {   

try{
device = myBTadapter.getRemoteDevice(address);

try {
outStream = btSocket.getOutputStream();
} catch (IOException e) {
}

try
{
btSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
}
catch (Exception e) {
}

try {
btSocket.connect();
} catch (IOException e) {

try {
btSocket.close();
} catch (IOException e2) {
}
}

try {
outStream = btSocket.getOutputStream();
} catch (IOException e) {
}
 char example = 'w';
 outStream.write(example);  
  outStream.flush(); 
  } catch (IOException e) { 
  }
}
 });

像这样......：）