固定的！！！
由于 api15 以来的 UUID 而没有工作，您可以使用 get 函数来获取 uuid
UID uuid = bluetoothDevice.getUuids()[0].getUuid();
BluetoothSocket socket = bluetoothDevice.createRfcommSocketToServiceRecord(uuid);
固定的！！！
我正在尝试连接到设备以将数据写入其上。我可以搜索设备，如果我单击连接线程就会启动，但不会调用“run()”函数。程序卡在
现在我正在尝试连接到蓝牙耳机。我不知道我是否正在配对两个设备？如果我使用手机的普通蓝牙，我会将两个设备与 1 2 3 4 之类的代码配对，但在我的程序中，您不必输入代码。你能帮我吗？
mmSocket.connect();
所以我的 connectedthread() 永远不会运行！
这是我的完整代码：
公共类 MainActivity 扩展 Activity {
private static final int REQUEST_ENABLE_BT = 1;
private BluetoothAdapter mBluetoothAdapter = null;
private ArrayAdapter<String> mNewDevicesArrayAdapter;
ListView newDevicesListView;
// Return Intent extra
public static String EXTRA_DEVICE_ADDRESS = "device_address";
private ConnectingDevices mConnectingDevices = null;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
newDevicesListView = (ListView)findViewById(R.id.new_devices);
mNewDevicesArrayAdapter=new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1);
newDevicesListView.setAdapter(mNewDevicesArrayAdapter);
newDevicesListView.setOnItemClickListener(mDeviceClickListener);
registerReceiver(mReceiver, new IntentFilter(BluetoothDevice.ACTION_FOUND));
mConnectingDevices = new ConnectingDevices();
}
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public void onClickbtnEtage1(View view)
{
mConnectingDevices.write(new byte[2]);
}
public void onClickbtnActivateBluetooth(View view)
{
if (mBluetoothAdapter == null)
{
Toast.makeText(this, "Bluetooth ist nicht verfügbar!", Toast.LENGTH_LONG).show();
finish();
return;
}
else if (!mBluetoothAdapter.isEnabled())
{
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
}
Toast.makeText(this, "Bluetooth wurde aktiviert!", Toast.LENGTH_LONG).show();
findViewById(R.id.btnSearchDevices).setEnabled(true);
}
public void onClickbtnSearchDevices(View view)
{
mBluetoothAdapter.startDiscovery();
Toast.makeText(this, "Bluetooth Geräte werden gesucht!", Toast.LENGTH_LONG).show();
// Find and set up the ListView for newly discovered devices
}
// Create a BroadcastReceiver for ACTION_FOUND
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
// When discovery finds a device
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
// Get the BluetoothDevice object from the Intent
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
// If it's already paired, skip it, because it's been listed already
if (device.getBondState() != BluetoothDevice.BOND_BONDED)
{
mNewDevicesArrayAdapter.add(device.getName() + "\n" + device.getAddress());
mNewDevicesArrayAdapter.notifyDataSetChanged();
}
}
}
};
// The on-click listener for all devices in the ListViews
private OnItemClickListener mDeviceClickListener = new OnItemClickListener() {
public void onItemClick(AdapterView<?> av, View v, int arg2, long arg3) {
// Cancel discovery because it's costly and we're about to connect
mBluetoothAdapter.cancelDiscovery();
// Get the device MAC address, which is the last 17 chars in the View
String info = ((TextView) v).getText().toString();
String address = info.substring(info.length() - 17);
// Create the result Intent and include the MAC address
Intent intent = new Intent();
intent.putExtra(EXTRA_DEVICE_ADDRESS, address);
// Set result and finish this Activity
// setResult(Activity.RESULT_OK, intent);
// finish();
address = intent.getExtras().getString(EXTRA_DEVICE_ADDRESS);
// Get the BLuetoothDevice object
BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
// Attempt to connect to the device
mConnectingDevices.connect(device);
}
};}
和我的连接设备类
public class ConnectingDevices {
boolean bconnectedthread = false;
boolean bconnectthread = false;
boolean bconnectedthreadstart = false;
boolean bconnectthreadstart = false;
boolean brun=false;
boolean bconnectedsynchronized=false;
//00001108-0000-1000-8000-00805F9B34FB
private BluetoothAdapter mBluetoothAdapter = null;
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
private ConnectedThread mConnectedThread;
//private final Handler mHandler;
private ConnectThread mConnectThread;
public void write(byte[] out) {
boolean a=bconnectedthread;
boolean b=bconnectthread;
boolean c=bconnectedthreadstart;
boolean d=bconnectthreadstart;
boolean e=brun;
boolean f=bconnectedsynchronized;
// Create temporary object
ConnectedThread r;
// Synchronize a copy of the ConnectedThread
synchronized (this) {
r = mConnectedThread;
}
// Perform the write unsynchronized
r.write(out);
}
private class ConnectThread extends Thread {
private final BluetoothSocket mmSocket;
private final BluetoothDevice mmDevice;
public ConnectThread(BluetoothDevice device) {
// Use a temporary object that is later assigned to mmSocket,
// because mmSocket is final
BluetoothSocket tmp = null;
mmDevice = device;
bconnectthread = true;
// Get a BluetoothSocket to connect with the given BluetoothDevice
try {
// MY_UUID is the app's UUID string, also used by the server code
tmp = device.createRfcommSocketToServiceRecord(MY_UUID);
} catch (IOException e) { }
mmSocket = tmp;
}
public void run() {
// Cancel discovery because it will slow down the connection
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
mBluetoothAdapter.cancelDiscovery();
brun=true;
try {
// Connect the device through the socket. This will block
// until it succeeds or throws an exception
mmSocket.connect();
} catch (IOException connectException) {
// Unable to connect; close the socket and get out
try {
mmSocket.close();
} catch (IOException closeException) { }
return;
}
// Do work to manage the connection (in a separate thread)
//bconnectedthreadstart = true;
connected(mmSocket);
}
/** Will cancel an in-progress connection, and close the socket */
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) { }
}
}
private class ConnectedThread extends Thread {
private final BluetoothSocket mmSocket;
private final InputStream mmInStream;
private final OutputStream mmOutStream;
public ConnectedThread(BluetoothSocket socket) {
mmSocket = socket;
InputStream tmpIn = null;
OutputStream tmpOut = null;
bconnectedthread=true;
// Get the input and output streams, using temp objects because
// member streams are final
try {
tmpIn = socket.getInputStream();
tmpOut = socket.getOutputStream();
} catch (IOException e) { }
mmInStream = tmpIn;
mmOutStream = tmpOut;
}
public void run() {
byte[] buffer = new byte[1024]; // buffer store for the stream
int bytes; // bytes returned from read()
// Keep listening to the InputStream until an exception occurs
while (true) {
try {
// Read from the InputStream
bytes = mmInStream.read(buffer);
// Send the obtained bytes to the UI activity
// mHandler.obtainMessage(MESSAGE_READ, bytes, -1, buffer)
// .sendToTarget();
} catch (IOException e) {
break;
}
}
}
/* Call this from the main activity to send data to the remote device */
public void write(byte[] bytes) {
try {
mmOutStream.write(bytes);
} catch (IOException e) { }
}
/* Call this from the main activity to shutdown the connection */
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) { }
}
}
public synchronized void connect(BluetoothDevice device)
{
bconnectthreadstart=true;
mConnectThread = new ConnectThread(device);
mConnectThread.start();
}
public synchronized void connected(BluetoothSocket socket) {
bconnectedsynchronized=true;
mConnectedThread = new ConnectedThread(socket);
mConnectedThread.start();
}}
logcat
05-21 17:49:29.902: W/dalvikvm(25720): threadid=1: thread exiting with uncaught exception (group=0x417da498)
05-21 17:49:29.912: E/AndroidRuntime(25720): FATAL EXCEPTION: main
05-21 17:49:29.912: E/AndroidRuntime(25720): java.lang.IllegalStateException: Could not execute method of the activity
05-21 17:49:29.912: E/AndroidRuntime(25720): at android.view.View$1.onClick(View.java:3676)
05-21 17:49:29.912: E/AndroidRuntime(25720): at android.view.View.performClick(View.java:4171)
05-21 17:49:29.912: E/AndroidRuntime(25720): at android.view.View$PerformClick.run(View.java:17070)
05-21 17:49:29.912: E/AndroidRuntime(25720): at android.os.Handler.handleCallback(Handler.java:615)
05-21 17:49:29.912: E/AndroidRuntime(25720): at android.os.Handler.dispatchMessage(Handler.java:92)
05-21 17:49:29.912: E/AndroidRuntime(25720): at android.os.Looper.loop(Looper.java:137)
05-21 17:49:29.912: E/AndroidRuntime(25720): at android.app.ActivityThread.main(ActivityThread.java:4797)
05-21 17:49:29.912: E/AndroidRuntime(25720): at java.lang.reflect.Method.invokeNative(Native Method)
05-21 17:49:29.912: E/AndroidRuntime(25720): at java.lang.reflect.Method.invoke(Method.java:511)
05-21 17:49:29.912: E/AndroidRuntime(25720): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:804)
05-21 17:49:29.912: E/AndroidRuntime(25720): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:571)
05-21 17:49:29.912: E/AndroidRuntime(25720): at dalvik.system.NativeStart.main(Native Method)
05-21 17:49:29.912: E/AndroidRuntime(25720): Caused by: java.lang.reflect.InvocationTargetException
05-21 17:49:29.912: E/AndroidRuntime(25720): at java.lang.reflect.Method.invokeNative(Native Method)
05-21 17:49:29.912: E/AndroidRuntime(25720): at java.lang.reflect.Method.invoke(Method.java:511)
05-21 17:49:29.912: E/AndroidRuntime(25720): at android.view.View$1.onClick(View.java:3671)
05-21 17:49:29.912: E/AndroidRuntime(25720): ... 11 more
05-21 17:49:29.912: E/AndroidRuntime(25720): Caused by: java.lang.NullPointerException
05-21 17:49:29.912: E/AndroidRuntime(25720): at com.example.elevator.ConnectingDevices.write(ConnectingDevices.java:40)
05-21 17:49:29.912: E/AndroidRuntime(25720): at com.example.elevator.MainActivity.onClickbtnEtage1(MainActivity.java:63)
05-21 17:49:29.912: E/AndroidRuntime(25720): ... 14 more
05-21 17:49:49.062: I/System.out(27064): Debugger has connected
05-21 17:49:49.062: I/System.out(27064): waiting for debugger to settle...
05-21 17:49:49.262: I/System.out(27064): waiting for debugger to settle...
05-21 17:49:49.472: I/System.out(27064): waiting for debugger to settle...
05-21 17:49:49.663: I/System.out(27064): waiting for debugger to settle...
05-21 17:49:49.863: I/System.out(27064): waiting for debugger to settle...
05-21 17:49:50.063: I/System.out(27064): waiting for debugger to settle...
05-21 17:49:50.263: I/System.out(27064): waiting for debugger to settle...
05-21 17:49:50.474: I/System.out(27064): debugger has settled (1455)
05-21 17:49:50.684: W/ResourceType(27064): No package identifier when getting value for resource number 0x00000000
05-21 17:49:50.684: W/PackageManager(27064): Failure retrieving resources forcom.example.elevator: Resource ID #0x0
05-21 17:49:50.944: D/IconCustomizer(27064): Generate customized icon for com.example.elevator.png
05-21 17:49:50.984: W/IconCustomizer(27064): can't load transform_config.xml
05-21 17:49:51.164: I/themeservice(27064): add pending job /data/data/com.example.elevator/cache/com.example.elevator.png
05-21 17:49:51.174: I/themeservice(27064): binding service
05-21 17:49:51.344: I/themeservice(27064): service connected
05-21 17:49:51.344: I/themeservice(27064): saving icon for /data/data/com.example.elevator/cache/com.example.elevator.png
05-21 17:49:51.415: I/Adreno200-EGL(27064): <qeglDrvAPI_eglInitialize:294>: EGL 1.4 QUALCOMM build: (CL3068996)
05-21 17:49:51.415: I/Adreno200-EGL(27064): Build Date: 03/07/13 Thu
05-21 17:49:51.415: I/Adreno200-EGL(27064): Local Branch: au37
05-21 17:49:51.415: I/Adreno200-EGL(27064): Remote Branch:
05-21 17:49:51.415: I/Adreno200-EGL(27064): Local Patches:
05-21 17:49:51.415: I/Adreno200-EGL(27064): Reconstruct Branch:
05-21 17:49:52.346: I/themeservice(27064): unbinding service
05-21 17:50:36.903: I/ConnectingDevices(27064): connectthread function started
05-21 17:50:36.903: I/ConnectingDevices(27064): connectthread is working
05-21 17:50:36.913: I/ConnectingDevices(27064): connectthread is running
05-21 17:50:36.953: E/ConnectingDevices(27064): mmSocket unable to connect
05-21 17:50:36.953: E/ConnectingDevices(27064): java.io.IOException: Unable to start Service Discovery
05-21 17:50:36.953: E/ConnectingDevices(27064): at android.bluetooth.BluetoothSocket$SdpHelper.doSdp(BluetoothSocket.java:455)
05-21 17:50:36.953: E/ConnectingDevices(27064): at android.bluetooth.BluetoothSocket.connect(BluetoothSocket.java:230)
05-21 17:50:36.953: E/ConnectingDevices(27064): at com.example.elevator.ConnectingDevices$ConnectThread.run(ConnectingDevices.java:77)