Android的蓝牙串口(Bluetooth SPP)使用

来源：互联网发布：淘宝宝贝裂变违规吗编辑：程序博客网时间：2024/05/13 02:58

while(1)
{
    GPIOB_ODR &= 0xFFFFFFF0;
    Delay_Ms(500);
    USART1_Send_String("Hello\n");
    GPIOB_ODR |= 0x1;
    Delay_Ms(500);
    USART1_Send_String("World\n");
 }

USART1_Send_String是向串口发数据的函数，这段程序在做的是，每隔500ms发一次Hello和World，发的时候PB0上的LED toggle一下，十分简单。蓝牙透传模块用的是HC-06，单片机是STM32。
以下是Android上的代码，主要来自anddev.org的网友，注释很详细，就不再多解释了。原来的代码只演示了发送数据，增加了接受数据的演示代码：

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packagecom.bt_spp;
 
importjava.io.IOException;
importjava.io.InputStream;
importjava.io.OutputStream;
importjava.util.UUID;
 
importandroid.app.Activity;
importandroid.bluetooth.BluetoothAdapter;
importandroid.bluetooth.BluetoothDevice;
importandroid.bluetooth.BluetoothSocket;
importandroid.os.Bundle;
importandroid.util.Log;
importandroid.view.MotionEvent;
importandroid.view.View;
importandroid.widget.Button;
importandroid.widget.Toast;
 
publicclass BT_sppActivity extendsActivity {
    privatestatic final String TAG = "THINBTCLIENT";
    privatestatic final boolean D = true;
    privateBluetoothAdapter mBluetoothAdapter = null;
    privateBluetoothSocket btSocket = null;
    privateOutputStream outStream = null;
    privateInputStream inStream = null;
    privateButton btn_read = null;
    // Well known SPP UUID (will *probably* map to
    // RFCOMM channel 1 (default) if not in use);
    // see comments in onResume().
    privatestatic final UUID MY_UUID =
            UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
 
    // ==> hardcode your server's MAC address here
    privatestatic String address = "00:11:09:18:00:54";
 
    /** Called when the activity is first created. */
    @Override
    publicvoid onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        if(D)
            Log.e(TAG,"+++ ON CREATE +++");
 
        mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        if(mBluetoothAdapter == null) {
            Toast.makeText(this,
                "Bluetooth is not available.",
                Toast.LENGTH_LONG).show();
            finish();
            return;
        }
 
        if(!mBluetoothAdapter.isEnabled()) {
            Toast.makeText(this,
                "Please enable your BT and re-run this program.",
                Toast.LENGTH_LONG).show();
            finish();
            return;
        }
 
        if(D)
            Log.e(TAG,"+++ DONE IN ON CREATE, GOT LOCAL BT ADAPTER +++");
        btn_read = (Button)findViewById(R.id.btn_read);
        btn_read.setOnClickListener(newButton.OnClickListener(){
 
            @Override
            publicvoid onClick(View arg0) {
                // TODO Auto-generated method stub
                Log.i(TAG,"Reading");
                if(inStream!=null)
                {
                    byte[] buff=newbyte[1024];
                    try{
                        inStream.read(buff);
                        String str = newString(buff);
                        Log.i(TAG,str);
                    }catch(IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
 
                }
            }});
    }
 
    @Override
    publicvoid onStart() {
        super.onStart();
        if(D)
            Log.e(TAG,"++ ON START ++");
    }
 
    @Override
    publicvoid onResume() {
        super.onResume();
 
        if(D) {
            Log.e(TAG,"+ ON RESUME +");
            Log.e(TAG,"+ ABOUT TO ATTEMPT CLIENT CONNECT +");
        }
 
        // When this returns, it will 'know' about the server,
        // via it's MAC address.
        BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
 
        // We need two things before we can successfully connect
        // (authentication issues aside): a MAC address, which we
        // already have, and an RFCOMM channel.
        // Because RFCOMM channels (aka ports) are limited in
        // number, Android doesn't allow you to use them directly;
        // instead you request a RFCOMM mapping based on a service
        // ID. In our case, we will use the well-known SPP Service
        // ID. This ID is in UUID (GUID to you Microsofties)
        // format. Given the UUID, Android will handle the
        // mapping for you. Generally, this will return RFCOMM 1,
        // but not always; it depends what other BlueTooth services
        // are in use on your Android device.
        try{
            btSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
        }catch(IOException e) {
            Log.e(TAG,"ON RESUME: Socket creation failed.", e);
        }
 
        // Discovery may be going on, e.g., if you're running a
        // 'scan for devices' search from your handset's Bluetooth
        // settings, so we call cancelDiscovery(). It doesn't hurt
        // to call it, but it might hurt not to... discovery is a
        // heavyweight process; you don't want it in progress when
        // a connection attempt is made.
        mBluetoothAdapter.cancelDiscovery();
 
        // Blocking connect, for a simple client nothing else can
        // happen until a successful connection is made, so we
        // don't care if it blocks.
        try{
            btSocket.connect();
            Log.e(TAG,"ON RESUME: BT connection established, data transfer link open.");
        }catch(IOException e) {
            try{
                btSocket.close();
            }catch(IOException e2) {
                Log.e(TAG,
                    "ON RESUME: Unable to close socket during connection failure", e2);
            }
        }
 
        // Create a data stream so we can talk to server.
        if(D)
            Log.e(TAG,"+ ABOUT TO SAY SOMETHING TO SERVER +");
 
        try{
            outStream = btSocket.getOutputStream();
            inStream = btSocket.getInputStream();
        }catch(IOException e) {
            Log.e(TAG,"ON RESUME: stream creation failed.", e);
        }
 
        String message = "Hello message from client to server.";
        byte[] msgBuffer = message.getBytes();
        try{
            outStream.write(msgBuffer);
        }catch(IOException e) {
            Log.e(TAG,"ON RESUME: Exception during write.", e);
        }
    }
    @Override
    publicvoid onPause() {
        super.onPause();
 
        if(D)
            Log.e(TAG,"- ON PAUSE -");
 
        if(outStream != null) {
            try{
                outStream.flush();
            }catch(IOException e) {
                Log.e(TAG,"ON PAUSE: Couldn't flush output stream.", e);
            }
        }
 
        try{
            btSocket.close();
        }catch(IOException e2) {
            Log.e(TAG,"ON PAUSE: Unable to close socket.", e2);
        }
    }
 
    @Override
    publicvoid onStop() {
        super.onStop();
        if(D)
            Log.e(TAG,"-- ON STOP --");
    }
 
    @Override
    publicvoid onDestroy() {
        super.onDestroy();
        if(D)
            Log.e(TAG,"--- ON DESTROY ---");
    }
}

http://billhsu.me/?p=118

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