Android手机通过蓝牙控制小车

由于蓝牙的搜索和匹配系统已经做的很好，大家可以可以调用系统的，所以主要的重点在于蓝牙建立连接接收和发送数据：

主要代码如下：

package com.examole.booth;import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.UUID;import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;public class BtSPP {public static String ErrorMessage = "No Error";private static final UUID SPP_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");private static BluetoothAdapter myBluetoothAdapter;private static BluetoothDevice myDevice;private static BluetoothSocket mySocket = null;private static OutputStream myOutStream = null;private static InputStream myInStream = null;public static boolean OpenPrinter(String BDAddr) {if (BDAddr == "" || BDAddr == null) {ErrorMessage = "没有选择小车";return false;}myBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();if (myBluetoothAdapter == null) {ErrorMessage = "蓝牙系统错误";return false;}myDevice = myBluetoothAdapter.getRemoteDevice(BDAddr);if (myDevice == null) {ErrorMessage = "读取蓝牙设备错误";return false;}if (!BtSPP.SPPOpen(myBluetoothAdapter, myDevice)) {return false;}return true;}public static boolean SPPOpen(BluetoothAdapter bluetoothAdapter,BluetoothDevice btDevice) {boolean error = false;myBluetoothAdapter = bluetoothAdapter;myDevice = btDevice;if (!myBluetoothAdapter.isEnabled()) {ErrorMessage = "蓝牙适配器没有打开";return false;}myBluetoothAdapter.cancelDiscovery();try {// mySocket = myDevice.createRfcommSocketToServiceRecord(SPP_UUID);Method m = myDevice.getClass().getMethod("createRfcommSocket",new Class[] { int.class });mySocket = (BluetoothSocket) m.invoke(myDevice, 1);} catch (SecurityException e) {mySocket = null;ErrorMessage = "蓝牙端口错误";return false;} catch (NoSuchMethodException e) {mySocket = null;ErrorMessage = "蓝牙端口错误";return false;} catch (IllegalArgumentException e) {mySocket = null;ErrorMessage = "蓝牙端口错误";return false;} catch (IllegalAccessException e) {mySocket = null;ErrorMessage = "蓝牙端口错误";return false;} catch (InvocationTargetException e) {mySocket = null;ErrorMessage = "蓝牙端口错误";return false;}try {mySocket.connect();} catch (IOException e2) {ErrorMessage = e2.getLocalizedMessage();// "无法连接蓝牙打印机";mySocket = null;return false;}try {myOutStream = mySocket.getOutputStream();} catch (IOException e3) {myOutStream = null;error = true;}try {myInStream = mySocket.getInputStream();} catch (IOException e3) {myInStream = null;error = true;}if (error) {SPPClose();return false;}return true;}public static boolean SPPClose() {try {Thread.sleep(1000);} catch (InterruptedException e) {}if (myOutStream != null) {try {myOutStream.flush();} catch (IOException e1) {}try {myOutStream.close();} catch (IOException e) {}myOutStream = null;}if (myInStream != null) {try {myInStream.close();} catch (IOException e) {}myInStream = null;}if (mySocket != null) {try {mySocket.close();} catch (IOException e) {}mySocket = null;}try {Thread.sleep(200);} catch (InterruptedException e) {}return true;}public static boolean SPPWrite(byte[] Data) {try {myOutStream.write(Data);} catch (IOException e) {ErrorMessage = "发送蓝牙数据失败";return false;}return true;}public static boolean SPPWrite(byte[] Data, int DataLen) {try {myOutStream.write(Data, 0, DataLen);} catch (IOException e) {ErrorMessage = "发送蓝牙数据失败";return false;}return true;}public static void SPPFlush() {int i = 0, DataLen = 0;try {DataLen = myInStream.available();} catch (IOException e1) {}for (i = 0; i < DataLen; i++) {try {myInStream.read();} catch (IOException e) {}}}public static boolean SPPRead(byte[] Data, int DataLen) {return SPPReadTimeout(Data, DataLen, 2000);}public static boolean SPPReadTimeout(byte[] Data, int DataLen, int Timeout) {int i;for (i = 0; i < (Timeout / 50); i++) {try {if (myInStream.available() >= DataLen) {try {myInStream.read(Data, 0, DataLen);return true;} catch (IOException e) {ErrorMessage = "读取蓝牙数据失败";return false;}}} catch (IOException e) {ErrorMessage = "读取蓝牙数据失败";return false;}try {Thread.sleep(50);} catch (InterruptedException e) {ErrorMessage = "读取蓝牙数据失败";return false;}}ErrorMessage = "蓝牙读数据超时";return false;}
}

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