蓝牙对和连接设备 [英] bluetooth pair and connect device
本文介绍了蓝牙对和连接设备的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我想配对设备并连接它，但是我有一个问题，我可以配对设备，但是我无法连接它们.我想知道如何解决这个问题.恐怕，我还没有很好地解释我的问题，我无法连接装置，无法将手机连接至蓝牙耳机，我只能配对，这是代码
I want to pair the device and connect it ,but I have a problem ,I just can pair device but I am not able to connect them. I want to know how to solve this problem. I'm afraid, I have not explained my problem very well, I can not connect means, connect your phone to a Bluetooth headset and I can only pair, here is the code
if (btAdapt.isEnabled()) {
tbtnSwitch.setChecked(false);
} else {
tbtnSwitch.setChecked(true);
}
// ============================================================
IntentFilter intent = new IntentFilter();
intent.addAction(BluetoothDevice.ACTION_FOUND);
intent.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
intent.addAction(BluetoothAdapter.ACTION_SCAN_MODE_CHANGED);
intent.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
registerReceiver(searchDevices, intent);
}
private BroadcastReceiver searchDevices = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
Bundle b = intent.getExtras();
Object[] lstName = b.keySet().toArray();
for (int i = 0; i < lstName.length; i++) {
String keyName = lstName[i].toString();
Log.e(keyName, String.valueOf(b.get(keyName)));
}
BluetoothDevice device = null;
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
device = intent
.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
if (device.getBondState() == BluetoothDevice.BOND_NONE) {
String str = "no pair|" + device.getName() + "|"
+ device.getAddress();
if (lstDevices.indexOf(str) == -1)
lstDevices.add(str);
adtDevices.notifyDataSetChanged();
}
}else if(BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)){
device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
switch (device.getBondState()) {
case BluetoothDevice.BOND_BONDING:
Log.d("BlueToothTestActivity", "it is pairing");
break;
case BluetoothDevice.BOND_BONDED:
Log.d("BlueToothTestActivity", "finish");
connect(device);
break;
case BluetoothDevice.BOND_NONE:
Log.d("BlueToothTestActivity", "cancel");
default:
break;
}
}
}
};
@Override
protected void onDestroy() {
this.unregisterReceiver(searchDevices);
super.onDestroy();
android.os.Process.killProcess(android.os.Process.myPid());
}
class ItemClickEvent implements AdapterView.OnItemClickListener {
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3)
{
if(btAdapt.isDiscovering())btAdapt.cancelDiscovery();
String str = lstDevices.get(arg2);
String[] values = str.split("\\|");
String address = values[2];
Log.e("address", values[2]);
BluetoothDevice btDev = btAdapt.getRemoteDevice(address);
try {
Boolean returnValue = false;
if (btDev.getBondState() == BluetoothDevice.BOND_NONE) {
BluetoothDevice.createBond(BluetoothDevice remoteDevice);
Method createBondMethod = BluetoothDevice.class
.getMethod("createBond");
Log.d("BlueToothTestActivity", "start");
returnValue = (Boolean) createBondMethod.invoke(btDev);
}else if(btDev.getBondState() == BluetoothDevice.BOND_BONDED){
connect(btDev);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
private void connect(BluetoothDevice btDev) {
UUID uuid = UUID.fromString(SPP_UUID);
try {
btSocket = btDev.createInsecureRfcommSocketToServiceRecord(uuid);
Log.d("BlueToothTestActivity", "connecting...");
btSocket.connect();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
class ClickEvent implements View.OnClickListener {
public void onClick(View v) {
if (v == btnSearch)
{
if (btAdapt.getState() == BluetoothAdapter.STATE_OFF) {
Toast.makeText(BlueToothTestActivity.this, "please open", 1000)
.show();
return;
}
if (btAdapt.isDiscovering())
btAdapt.cancelDiscovery();
lstDevices.clear();
Object[] lstDevice = btAdapt.getBondedDevices().toArray();
for (int i = 0; i < lstDevice.length; i++) {
BluetoothDevice device = (BluetoothDevice) lstDevice[i];
String str = "pair|" + device.getName() + "|"
+ device.getAddress();
lstDevices.add(str);
adtDevices.notifyDataSetChanged();
}
setTitle("address：" + btAdapt.getAddress());
btAdapt.startDiscovery();
} else if (v == tbtnSwitch) {
if (tbtnSwitch.isChecked() == false)
btAdapt.enable();
else if (tbtnSwitch.isChecked() == true)
btAdapt.disable();
} else if (v == btnDis)
{
Intent discoverableIntent = new Intent(
BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
discoverableIntent.putExtra(
BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300);
startActivity(discoverableIntent);
} else if (v == btnExit) {
try {
if (btSocket != null)
btSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
BlueToothTestActivity.this.finish();
}
}
}
}
推荐答案
引用您的代码:
btSocket = btDev.createInsecureRfcommSocketToServiceRecord(uuid);
Log.d("BlueToothTestActivity", "connecting...");
btSocket.connect();
您可以在Android官方文档中找到有关作为客户端进行连接的代码，
You can find the code on the official Android documentation on connecting as a client, here.
我看到了可能会导致问题的四件事:
I can see 4 things that might cause problems:
- 您应该在单独的线程中连接！ .connect()是一个阻止呼叫-请参见上面的链接
- 并非所有设备都接受不安全的连接
- 对于低于2.3.3的Android设备，此方法无效.您必须通过反射调用私有方法-请参见此.另外，我认为您会在SO上找到它.
- 围绕.create ....进行尝试/捕获并在Logcat上发布错误.
- You should connect in a separate thread! .connect() is a blocking call - see link above
- Not all devices accept insecure connections
- For Android devices below 2.3.3 this method does not work. You have to call a private method via reflection - see this. Also I think you will find it on SO.
- Surround .create.... with a try/catch and post errors on Logcat.
您可以发布Logcat日志吗?
Can you post your Logcat logs?
这篇关于蓝牙对和连接设备的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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