1.权限 使用蓝牙设备需要先在Manifest中开放权限，位置如下。 [html] view plaincopy

...

// 使用蓝牙设备的权限

// 管理蓝牙设备的权限

2.打开蓝牙 获得蓝牙适配器(android.bluetooth.BluetoothAdapter)，检查该设备是否支持蓝牙，如果支持，就打开蓝牙。 [java] view plaincopy // 检查设备是否支持蓝牙

adapter = BluetoothAdapter.getDefaultAdapter();

if (adapter == null)

{

// 设备不支持蓝牙

}

// 打开蓝牙

if (!adapter.isEnabled())

{

Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);

// 设置蓝牙可见性，最多300秒

intent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300);

context.startActivity(intent);

}

3.获取已配对的蓝牙设备(android.bluetooth.BluetoothDevice) 首次连接某蓝牙设备需要先配对，一旦配对成功，该设备的信息会被保存，以后连接时无需再配对，所以已配对的设备不一定是能连接的。 [java] view plaincopy BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();

Set devices = adapter.getBondedDevices();

for(int i=0; i

{

BluetoothDevice device = (BluetoothDevice) devices.iterator().next();

System.out.println(device.getName());

}

4.搜索周围的蓝牙设备 适配器搜索蓝牙设备后将结果以广播形式传出去，所以需要自定义一个继承广播的类，在onReceive方法中获得并处理蓝牙设备的搜索结果。 [java] view plaincopy // 设置广播信息过滤

IntentFilter intentFilter = new IntentFilter();

intentFilter.addAction(BluetoothDevice.ACTION_FOUND);

intentFilter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);

intentFilter.addAction(BluetoothAdapter.ACTION_SCAN_MODE_CHANGED);

intentFilter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);

// 注册广播接收器，接收并处理搜索结果

context.registerReceiver(receiver, intentFilter);

// 寻找蓝牙设备，android会将查找到的设备以广播形式发出去

adapter.startDiscovery();

自定义广播类 [java] view plaincopy private BroadcastReceiver receiver = new BroadcastReceiver() {

@Override

public void onReceive(Context context, Intent intent) {

String action = intent.getAction();

if (BluetoothDevice.ACTION_FOUND.equals(action)) {

BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);

System.out.println(device.getName());

}

}

}

5.蓝牙设备的配对和状态监视 [java] view plaincopy private BroadcastReceiver receiver = new BroadcastReceiver() {

@Override

public void onReceive(Context context, Intent intent) {

String action = intent.getAction();

if (BluetoothDevice.ACTION_FOUND.equals(action)) {

// 获取查找到的蓝牙设备

BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);

System.out.println(device.getName());

// 如果查找到的设备符合要连接的设备，处理

if (device.getName().equalsIgnoreCase(name)) {

// 搜索蓝牙设备的过程占用资源比较多，一旦找到需要连接的设备后需要及时关闭搜索

adapter.cancelDiscovery();

// 获取蓝牙设备的连接状态

connectState = device.getBondState();

switch (connectState) {

// 未配对

case BluetoothDevice.BOND_NONE:

// 配对

try {

Method createBondMethod = BluetoothDevice.class.getMethod("createBond");

createBondMethod.invoke(device);

} catch (Exception e) {

e.printStackTrace();

}

break;

// 已配对

case BluetoothDevice.BOND_BONDED:

try {

// 连接

connect(device);

} catch (IOException e) {

e.printStackTrace();

}

break;

}

}

} else if(BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)) {

// 状态改变的广播

BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);

if (device.getName().equalsIgnoreCase(name)) {

connectState = device.getBondState();

switch (connectState) {

case BluetoothDevice.BOND_NONE:

break;

case BluetoothDevice.BOND_BONDING:

break;

case BluetoothDevice.BOND_BONDED:

try {

// 连接

connect(device);

} catch (IOException e) {

e.printStackTrace();

}

break;

}

}

}

}

}

6.蓝牙设备的连接 [java] view plaincopy private void connect(BluetoothDevice device) throws IOException {

// 固定的UUID

final String SPP_UUID = "00001101-0000-1000-8000-00805F9B34FB";

UUID uuid = UUID.fromString(SPP_UUID);

BluetoothSocket socket = device.createRfcommSocketToServiceRecord(uuid);

socket.connect();

}