我的Android应用程序将蓝牙设备连接为客户端。
第一次尝试： 设备连接，关闭应用程序，套接字和iostreams关闭。
第二次尝试： 设备没有连接，但我得到连接的吐司。没有例外。
关闭蓝牙设备然后再打开，使设备连接并且问题仍然存在
public class ConnectingThread extends Thread{
private ImageView connect;
private Context context;
private final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
private BluetoothAdapter mmAdapter;
public static BluetoothSocket mmSocket ;
private InputStream mmInStream ;
private OutputStream mmOutStream ;
private VibrotacDevice device;
public ConnectingThread(BluetoothDevice device, Context context, BluetoothAdapter adapter ) {
mmAdapter=adapter;
// connect=(ImageView) ((Activity)context).findViewById(R.id.connectionimg);
this.context=context;
BluetoothSocket tmp = null;
// 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);
Log.d("Mainbt", "inside constructor try");
} catch (IOException e) {
Log.d("Mainbt", "inside constructor catch: "+ e.getMessage());
Toast.makeText(context, e.getMessage(), Toast.LENGTH_SHORT).show();
}
mmSocket = tmp;
}
public void run() {
// Cancel discovery because it will slow down the connection
if(mmAdapter.isDiscovering())
mmAdapter.cancelDiscovery();
try {
// Connect the device through the socket. This will block
// until it succeeds or throws an exception
mmSocket.connect();
Log.d("Mainbt", "connecting");
} catch (final IOException connectException) {
// Unable to connect; close the socket and get out
((Activity) context).runOnUiThread(new Runnable() {
@Override
public void run() {
Log.d("Mainbt", " unable to connect"+ connectException.getMessage());
Toast.makeText(context, connectException.getMessage(), Toast.LENGTH_SHORT).show();
}
});
try {
mmSocket.close();
Log.d("Mainbt", " trying to close connection0");
((Activity) context).runOnUiThread(new Runnable() {
@Override
public void run() {
Log.d("Mainbt", " trying to close connection1");
// connect.setImageResource(R.drawable.connectionstatus_disconnected);
Toast.makeText(context, "Could not establish Connection", Toast.LENGTH_SHORT).show();
}
});
} catch (IOException closeException) {
}
return;
}
((Activity) context).runOnUiThread(new Runnable() {
@Override
public void run() {
Log.d("Mainbt", "connected");
// connect.setImageResource(R.drawable.connectionstatus_connected);
Toast.makeText(context, "Connected", Toast.LENGTH_SHORT).show();
}
});
connectingStreams();
}
public void connectingStreams( ){
try {
mmInStream = mmSocket.getInputStream();
mmOutStream =mmSocket.getOutputStream();
} catch (IOException e) {
}
try {
connectedVibration();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
public void cancel() {
if(mmInStream!=null){
try {
Log.d("Mainbt", "closingIstream");
mmInStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mmInStream=null;
Log.d("Mainbt", "closedIstream");
}
if(mmOutStream!=null){
try {
Log.d("Mainbt", "closingOstream");
mmOutStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mmOutStream=null;
Log.d("Mainbt", "closedOstream");
}
}
public static void cancelSocket(){
if(mmSocket!=null){
try {
Log.d("Mainbt", "closingSocket");
mmSocket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Log.d("Mainbt", "closedSocket");
mmSocket=null;
}
}
}
上述类是从Acticity调用的，它在一个对话框中显示设备名称和mac地址，单击它，启动一个连接
private void initializeBluetooth() {
adapter=BluetoothAdapter.getDefaultAdapter();
if(adapter==null){
Toast.makeText(getApplicationContext(), "Device does not support Bluetooth", Toast.LENGTH_SHORT).show();
finish();
} else{
//Checks if bluetooth is enabled
if(adapter.isEnabled()){
devices= new ArrayAdapter<String>(this, android.R.layout.select_dialog_singlechoice );
Set<BluetoothDevice> pairedDevices=adapter.getBondedDevices();
// checks if any device have been paired previously
if(pairedDevices.size()> 0){
for(BluetoothDevice device: pairedDevices){
devices.add(device.getName()+"\n"+device.getAddress());
}
showPairedDialog();
}else{
//Dialog to scan new devices
showScanningDialog();
}
}else{
Intent enablebt= new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enablebt, REQUEST_ENABLE_BT);
}
}
}
private void showScanningDialog() {
AlertDialog.Builder builder= new AlertDialog.Builder(this);
builder.setTitle("No devices Paired");
builder.setMessage("Would you like to scan for devices");
builder.setNegativeButton("cancel", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
builder.setPositiveButton("Scan", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
//devices.clear();
Log.v("checkup", "inside onclick ");
discoverDevice();
}
});
builder.create();
builder.show();
}
private void showPairedDialog() {
AlertDialog.Builder builder= new AlertDialog.Builder(this);
builder.setTitle("Paired Devices");
builder.setAdapter(devices, new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int item) {
Toast.makeText(getApplicationContext(), "Connecting to device...", Toast.LENGTH_SHORT).show();
//connect.setImageResource(R.drawable.connectionstatus_connecting);
String info= devices.getItem(item);
String address= info.substring(info.length()-17);
BluetoothDevice btDevice=adapter.getRemoteDevice(address);
ct= new ConnectingThread( btDevice,context,adapter );
ct.start();
}
});
builder.setNeutralButton("cancel", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
builder.setPositiveButton("Scan", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Toast.makeText(getApplicationContext(), "Scanning...", Toast.LENGTH_SHORT).show();
devices.clear();
discoverDevice();
}
});
dialog= builder.create();
dialog.show();
}
private void discoverDevice() {
Log.v("checkup", "inside discover ");
adapter.startDiscovery();
receiver= new BroadcastReceiver(){
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
// Get the BluetoothDevice object from the Intent
BluetoothDevice bluedevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
if(bluedevice.getBondState()!=BluetoothDevice.BOND_BONDED){
// Add the name and address to an array adapter to show in a ListView
devices.add(bluedevice.getName() + "\n" + bluedevice.getAddress());
Toast.makeText(getApplicationContext(),bluedevice.getName() , Toast.LENGTH_SHORT).show();
}
}
}
};
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
registerReceiver(receiver, filter);
AlertDialog.Builder builder= new AlertDialog.Builder(this);
builder.setAdapter(devices, new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int item) {
Toast.makeText(getApplicationContext(), "Connecting to device...", Toast.LENGTH_SHORT).show();
String info= devices.getItem(item);
String address= info.substring(info.length()-17);
BluetoothDevice btDevice=adapter.getRemoteDevice(address);
ct= new ConnectingThread( btDevice,context,adapter);
ct.start();
}
});
builder.setNegativeButton("cancel", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
builder.create();
builder.show();
}
@Override
protected void onActivityResult(int requestCode, int resultCode,Intent data){
if(requestCode==REQUEST_ENABLE_BT && resultCode==RESULT_OK){
initializeBluetooth();
}
}
请帮帮我