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当我使用连接到蓝牙设备显示为mBTSocket.connect();如何连接Buletooth插座蓝牙打印机打印数据
错误信息
12-19 11:29:05.328: E/Class(6762): java.io.IOException: read failed, socket might closed or timeout, read ret: -1
12-19 11:29:05.328: E/Class(6762): at android.bluetooth.BluetoothSocket.readAll(BluetoothSocket.java:505)
12-19 11:29:05.328: E/Class(6762): at android.bluetooth.BluetoothSocket.readInt(BluetoothSocket.java:516)
12-19 11:29:05.328: E/Class(6762): at android.bluetooth.BluetoothSocket.connect(BluetoothSocket.java:320)
12-19 11:29:05.328: E/Class(6762): at com.airtimeonline.Sales$12.run(Sales.java:1219)
12-19 11:29:05.328: E/Class(6762): at java.lang.Thread.run(Thread.java:841)
我的代码是
public void printing()
{
try {
BILL ="";
Calendar c = Calendar.getInstance();
SimpleDateFormat df = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss");
String currentdate = df.format(c.getTime());
if(reprintchkbx.isChecked())
{
BILL = BILL + " E RECHARGE"+ " " +currentdate;
BILL = BILL + "\n ";
BILL = BILL + "\n--------------------------------";
BILL = BILL + "\nNetWork :" + " " + networkprint;
BILL = BILL + "\nDenomination :" + " " + denominationprint;
BILL = BILL + "\nPin No :" + " " + pinnoprint;
BILL = BILL + "\nSerial No :" + " " + serialnoprint;
BILL = BILL + "\n--------------------------------";
BILL = BILL + "\n ";
BILL = BILL + "\n www.prepaidzone.co.za";
BILL = BILL + "\n \n\n\n";
}
else if(reprintchkbxall.isChecked())
{
for(int i=0; i< Networkprintout.length; i++)
{
BILL = BILL + " E RECHARGE"+ " " +currentdate;
BILL = BILL + "\n ";
BILL = BILL + "\n--------------------------------";
BILL = BILL + "\nNetWork :" + " " + Networkprintout[i];
BILL = BILL + "\nDenomination :" + " " + Denominationprintout[i];
BILL = BILL + "\nPin No :" + " " + Pinnoprintout[i];
BILL = BILL + "\nSerial No :" + " " + serialnoprintout[i];
BILL = BILL + "\n--------------------------------";
BILL = BILL + "\n ";
BILL = BILL + "\n www.prepaidzone.co.za";
BILL = BILL + "\n \n\n\n";
}
}
else
{
for(int i=0; i< Integer.parseInt(Quantity.toString()); i++)
{
BILL = BILL + " E RECHARGE"+ " " +currentdate;
BILL = BILL + "\n ";
BILL = BILL + "\n--------------------------------";
BILL = BILL + "\nNetWork :" + " " + Networkprintout[i];
BILL = BILL + "\nDenomination :" + " " + Denominationprintout[i];
BILL = BILL + "\nPin No :" + " " + Pinnoprintout[i];
BILL = BILL + "\nSerial No :" + " " + serialnoprintout[i];
BILL = BILL + "\n--------------------------------";
BILL = BILL + "\n ";
BILL = BILL + "\n www.prepaidzone.co.za";
BILL = BILL + "\n \n\n\n";
}
}
mBTAdapter = BluetoothAdapter.getDefaultAdapter();
dialogProgress = new Dialog(Sales.this);
try {
if (mBTAdapter.isDiscovering())
mBTAdapter.cancelDiscovery();
else
mBTAdapter.startDiscovery();
} catch (Exception e) {
Log.e("Class ", "My Exe ", e);
}
System.out.println("BT Searching status :"
+ mBTAdapter.isDiscovering());
if (mBTAdapter == null) {
Toast.makeText(Sales.this, "Device has no bluetooth capability",
Toast.LENGTH_LONG).show();
finish();
} else {
if (!mBTAdapter.isEnabled()) {
Intent i = new Intent(
BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(i, 0);
}
// Register the BroadcastReceiver
IntentFilter filter = new IntentFilter(
BluetoothDevice.ACTION_FOUND);
registerReceiver(mReceiver, filter); // Don't forget to
// unregister during
// onDestroy
dialogProgress
.setOnDismissListener(new DialogInterface.OnDismissListener() {
public void onDismiss(DialogInterface dialog) {
dialog.dismiss();
setResult(RESULT_CANCELED);
finish();
}
});
}
} catch (Exception e) {
Log.e("Class ", "My Exe ", e);
}
}
public void printBillToDevice(final String address) {
new Thread(new Runnable() {
public void run() {
runOnUiThread(new Runnable() {
public void run() {
}
});
mBTAdapter.cancelDiscovery();
try {
BluetoothDevice mdevice = mBTAdapter
.getRemoteDevice(address);
Method m = mdevice.getClass().getMethod(
"createRfcommSocket", new Class[] { int.class });
mBTSocket = (BluetoothSocket) m.invoke(mdevice, 1);
mBTSocket.connect();
OutputStream os = mBTSocket.getOutputStream();
os.flush();
os.write(BILL.getBytes());
mBTSocket.close();
/* finish();*/
} catch (Exception e) {
Log.e("Class ", "My Exe ", e);
e.printStackTrace();
setResult(RESULT_CANCELED);
finish();
}
runOnUiThread(new Runnable() {
public void run() {
try {
dialogProgress.dismiss();
} catch (Exception e) {
Log.e("Class ", "My Exe ", e);
}
}
});
}
}).start();
}
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
try {
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 (device.getName().equalsIgnoreCase(PRINTER_NAME))
{
mBTAdapter.cancelDiscovery();
dialogProgress.dismiss();
Toast.makeText(Sales.this,device.getName() + " Printing Voucher",Toast.LENGTH_LONG).show();
printBillToDevice(device.getAddress());
btn_print.setEnabled(true);
printalert();
}
}
} catch (Exception e) {
Log.e("Class ", "My Exe ", e);
}
}
};
请帮帮我。