Android之蓝牙开发初编(发现蓝牙,配对蓝牙,连接蓝牙)

1.添加蓝牙权限:

<uses-permission android:name="android.permission.BLUETOOTH"/>

<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>

2.搜索蓝牙(使用BluetoochAdapter)
BluetoothAdapter adapter=BluetoothAdapter.getDefaultAdapter();//获取蓝牙
if (adapter==null){
ToastUtil.showToast(context,"该设备不支持蓝牙");
return;
}
if (!adapter.isEnabled()){//是否打开蓝牙设备
Intent intent=new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
context.startActivityForResult(intent,REQUEST_ENABLE);
Intent discoverableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
discoverableIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300);
context.startActivity(discoverableIntent);
}else {
Set<BluetoothDevice> sets=adapter.getBondedDevices();
IntentFilter filter = new IntentFilter();
filter.addAction(BluetoothDevice.ACTION_FOUND);
filter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
filter.addAction(BluetoothAdapter.ACTION_SCAN_MODE_CHANGED);
filter.addAction(BluetoothDevice.ACTION_ACL_CONNECTED);
filter.addAction(BluetoothDevice.ACTION_ACL_DISCONNECTED);
filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
context.registerReceiver(mreceiver, filter);
if (sets.size()>0){//获取已经配备设备
for (BluetoothDevice device:sets){
bluetoothDevices.add(device);
bd=device;
new ConnectThread().start();
}
}else {
adapter.startDiscovery();
}
}

3.蓝牙广播:

private static BroadcastReceiver mreceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
bd = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
//发现蓝牙设备
Log.d("xxx", "find:" + bd.getName());
if (bd.getName()!=null){
if (bd.getName().contains("BF4030")){//查找设备名为:BF4030进行配对
if (bd.getBondState()==BluetoothDevice.BOND_NONE){//如果没有配对
//进行配对
try {
Method mm = bd.getClass().getMethod("createBond", (Class[]) null);
mm.invoke(bd, (Object[]) null);//这里会弹出输入pin窗口
}catch (Exception e){
e.printStackTrace();
}
}else if (bd.getBondState()==BluetoothDevice.BOND_BONDED){
new ConnectThread().start();//已经配对进行连接
}
}
}
}else if (BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)){//配对状态的改变
bd = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
switch (bd.getBondState()){
case BluetoothDevice.BOND_BONDING:
LogUtil.ShowLog(TAG,"正在配对...");
break;
case BluetoothDevice.BOND_BONDED:
LogUtil.ShowLog(TAG,"完成配对.");
new ConnectThread().start();
break;
case BluetoothDevice.BOND_NONE:
LogUtil.ShowLog(TAG,"取消配对.");
break;
}
}else if (BluetoothDevice.ACTION_ACL_CONNECTED.equals(action)){
LogUtil.ShowLog(TAG,"已经连接上蓝牙设备");
}else if (BluetoothDevice.ACTION_ACL_DISCONNECTED.equals(action)){
LogUtil.ShowLog(TAG,"已经断开蓝牙设备");
}
}
};

4.连接蓝牙设备(根据BluetoochDevice)

public static class ConnectThread extends Thread {
static final String SPP_UUID = "00001101-0000-1000-8000-00805F9B34FB";
public ConnectThread() {
BluetoothSocket tmp = null;
try {
tmp=bd.createRfcommSocketToServiceRecord(UUID.fromString(SPP_UUID));
} catch (IOException e) {
e.printStackTrace();
}
bluesocket = tmp;
}

@Override
public void run() {
adapter.cancelDiscovery();//取消蓝牙发现
try {
if (!bluesocket.isConnected()){
bluesocket.connect();//发起连接
//连接成功后读取数据
handler.sendEmptyMessage(101);//连接成功
new ConnectedThread().start();
}
} catch (IOException e) {
handler.sendEmptyMessage(103);//断开连接
}
}
}

private static class ConnectedThread extends Thread {
private final InputStream mis;
private ConnectedThread() {
InputStream tmpis = null;
try {
tmpis = bluesocket.getInputStream();
} catch (IOException e) {
e.printStackTrace();
}
mis = tmpis;
}

@Override
public void run() {
byte[] buffer = new byte[1024];
int bytes;
while (true) {
try {
if (bluesocket.isConnected()){
bytes = mis.read(buffer);//读取得到的信息发送消息
handler.obtainMessage(102,bytes,-1,buffer).sendToTarget();
}else {
handler.sendEmptyMessage(103);//断开连接
return;
}
} catch (IOException e) {
handler.sendEmptyMessage(103);//断开连接
return;
}
}
}
}