private void Form1_KeyPress(object sender, KeyPressEventArgs e)
{
if (this.m_keyCode == Keys.Enter)
{
webBrowser1.Navigate(textBox1.Text);
}
Related
I managed to establish a bluetooth connection from my main activity but i want to print from another activity.
How can I do this?
Main Activity Where I Start A connection to a bluetooth printer
protected static final String TAG = "TAG";
private static final int REQUEST_ENABLE_BT = 2;
private static final int REQUEST_CONNECT_DEVICE = 1;
private ProgressDialog BluetoothConnectProgressDialog;
Button button_connect_to_bluetooth_printer;
private UUID applicationUUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
private BluetoothAdapter bluetoothAdapter;
private BluetoothSocket bluetoothSocket;
private BluetoothDevice bluetoothDevice;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button_connect_to_bluetooth_printer = findViewById(R.id.btn_connect_bluetooth);
button_connect_to_bluetooth_printer.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View view)
{
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (!bluetoothAdapter.isEnabled())
{
Intent enableBluetooth = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBluetooth, REQUEST_ENABLE_BT);
}
else
{
ListPairedDevices();
Intent connectIntent = new Intent(MainActivity.this, BluetoothDeviceListActivity.class);
startActivityForResult(connectIntent,
REQUEST_CONNECT_DEVICE);
}
}
});
}
private void ListPairedDevices()
{
Set<BluetoothDevice> PairedDevices = bluetoothAdapter.getBondedDevices();
if (PairedDevices.size() > 0)
{
for (BluetoothDevice mDevice : PairedDevices)
{
Log.v(TAG, "PairedDevices: " + mDevice.getName() + mDevice.getAddress());
}
}
}
public void onActivityResult(int RequestCode, int ResultCode, Intent DataIntent)
{
super.onActivityResult(RequestCode, ResultCode, DataIntent);
switch (RequestCode)
{
case REQUEST_CONNECT_DEVICE:
if (ResultCode == Activity.RESULT_OK)
{
Bundle mExtra = DataIntent.getExtras();
String mDeviceAddress = mExtra.getString("DeviceAddress");
Log.v(TAG, "Coming incoming address " + mDeviceAddress);
bluetoothDevice = bluetoothAdapter
.getRemoteDevice(mDeviceAddress);
BluetoothConnectProgressDialog = ProgressDialog.show(this, "Connecting...", bluetoothDevice.getName() + " : " + bluetoothDevice.getAddress(), true, true);
Thread mBlutoothConnectThread = new Thread(this);
mBlutoothConnectThread.start();
// pairToDevice(mBluetoothDevice); This method is replaced by
// progress dialog with thread
}
break;
case REQUEST_ENABLE_BT:
if (ResultCode == Activity.RESULT_OK) {
ListPairedDevices();
Intent connectIntent = new Intent(MainActivity.this,
BluetoothDeviceListActivity.class);
startActivityForResult(connectIntent, REQUEST_CONNECT_DEVICE);
} else {
Toast.makeText(MainActivity.this, "Message", Toast.LENGTH_SHORT).show();
}
break;
}
}
public void run()
{
try
{
bluetoothSocket = bluetoothDevice.createRfcommSocketToServiceRecord(applicationUUID);
bluetoothAdapter.cancelDiscovery();
bluetoothSocket.connect();
handler.sendEmptyMessage(0);
}
catch (IOException eConnectException)
{
Log.d(TAG, "CouldNotConnectToSocket", eConnectException);
closeSocket(bluetoothSocket);
return;
}
}
#SuppressLint("HandlerLeak")
private Handler handler = new Handler() {
#Override
public void handleMessage(Message msg)
{
BluetoothConnectProgressDialog.dismiss();
}
};
private void closeSocket(BluetoothSocket nOpenSocket)
{
try
{
nOpenSocket.close();
Log.d(TAG, "SocketClosed");
}
catch (IOException ex)
{
Log.d(TAG, "CouldNotCloseSocket");
}
}
this is my device list activity
protected static final String TAG = "TAG";
private BluetoothAdapter bluetoothAdapter;
private ArrayAdapter<String> paired_devices_list;
#Override
protected void onCreate(Bundle mSavedInstanceState)
{
super.onCreate(mSavedInstanceState);
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
setContentView(R.layout.activity_bluetooth_device_list);
setResult(Activity.RESULT_CANCELED);
paired_devices_list = new ArrayAdapter<>(this, R.layout.bluetooth_device_name);
ListView PairedListDevices = findViewById(R.id.paired_devices);
PairedListDevices.setAdapter(paired_devices_list);
PairedListDevices.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l)
{
try
{
bluetoothAdapter.cancelDiscovery();
String mdeviceInfo = ((TextView) view).getText().toString();
String deviceAddress = mdeviceInfo.substring(mdeviceInfo.length() - 17);
Log.v(TAG, "Device_Address " + deviceAddress);
Bundle bundle = new Bundle();
bundle.putString("DeviceAddress", deviceAddress);
Intent mBackIntent = new Intent();
mBackIntent.putExtras(bundle);
setResult(Activity.RESULT_OK, mBackIntent);
finish();
}
catch (Exception ex)
{
ex.printStackTrace();
}
}
});
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
Set<BluetoothDevice> PairedDevices = bluetoothAdapter.getBondedDevices();
if (PairedDevices.size() > 0)
{
findViewById(R.id.title_paired_devices).setVisibility(View.VISIBLE);
for (BluetoothDevice mDevice : PairedDevices)
{
paired_devices_list.add(mDevice.getName() + "\n" + mDevice.getAddress());
}
}
else
{
String NoDevices = "None Paired";
paired_devices_list.add(NoDevices);
}
}
#Override
protected void onDestroy()
{
super.onDestroy();
if (bluetoothAdapter != null)
{
bluetoothAdapter.cancelDiscovery();
}
}
And this my print activity
public void print()
{
Thread t = new Thread()
{
public void run()
{
try
{
OutputStream os = bluetoothSocket.getOutputStream();
String account_no;
account_no_value = ""+ Account_No.getText().toString()+"\n";
os.write(account_no.getBytes());
}
catch (Exception e)
{
Log.e("PrintActivity", "Exe ", e);
}
}
};
t.start();
}
E/PrintActivity: Exe
java.lang.NullPointerException: Attempt to invoke virtual method 'java.io.OutputStream android.bluetooth.BluetoothSocket.getOutputStream()' on a null object reference
at com.vicjames.qiimeterreader.PrintBill$6.run(PrintBill.java:1635)
how can I fix this?? The app is not crashing but it wont print either.
I'm trying to build a GUI for my application. I'm stuck on one problem. I try to use timer "OnTImedEvent" to call my function to update the chart. Unfortunately, MVS gives me a "Cross-thread operation not valid". I've came across some tips, regarding something called delegate but I can't manage to get it working. Since I'm nooby in windowsFormsApp (started today) I'm asking for your help. Here's my code:
using System;
using System.IO.Ports;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Timers;
namespace WindowsFormsApp1
{
public partial class Form1 : Form
{
bool state = false;
private static System.Timers.Timer timer;
public Form1()
{
InitializeComponent();
timer = new System.Timers.Timer(10);
timer.Elapsed += OnTimedEvent;
timer.AutoReset = true;
timer.Enabled = true;
}
private void button1_Click(object sender, EventArgs e)
{
if (serialPort1.IsOpen)
{
serialPort1.WriteLine("a\n");
}
else
MessageBox.Show("Brak połączenia z urządzeniem");
}
private void button4_Click(object sender, EventArgs e)
{
if (serialPort1.IsOpen)
{
Form2 form2 = new Form2(serialPort1);
form2.Show();
}
else
MessageBox.Show("Brak połączenia z urządzeniem");
}
private void Form1_Load(object sender, EventArgs e)
{
string[] ports = SerialPort.GetPortNames();
comBoxPort.Items.AddRange(ports);
}
private void btnCon_Click(object sender, EventArgs e)
{
if (state)
{
state = false;
btnCon.ForeColor = Color.Red;
try
{
serialPort1.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Message", MessageBoxButtons.OK, MessageBoxIcon.Error);
throw;
}
}
else
{
state = true;
btnCon.ForeColor = Color.Green;
try
{
serialPort1.PortName = comBoxPort.Text;
serialPort1.Open();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Message", MessageBoxButtons.OK, MessageBoxIcon.Error);
throw;
}
}
}
private void btnRoll_Click(object sender, EventArgs e)
{
if (serialPort1.IsOpen)
{
serialPort1.WriteLine("s\n");
}
else
MessageBox.Show("Brak połączenia z urządzeniem");
}
private void btnYAW_Click(object sender, EventArgs e)
{
drawChart();
if (serialPort1.IsOpen)
{
serialPort1.WriteLine("d\n");
}
//else
//MessageBox.Show("Brak połączenia z urządzeniem");
}
private void drawChart()
{
chart1.Series["PITCH"].Points.AddY(21);
chart1.Series["ROLL"].Points.AddY(122);
chart1.Series["YAW"].Points.AddY(13);
}
public delegate void drawChartCallback();
private void chart1_Click(object sender, EventArgs e)
{
}
private void OnTimedEvent(Object source, ElapsedEventArgs e)
{
drawChart();
}
}
}
Thanks in advance for your help.
While its not the best way to do it, for a beginner the easist way to avoid the problem is to use the following variable form.CheckForIllegalCrossThreadCalls = false;
While creating GI for sales order screen I want to display the total number of lines in document details tab. Can anyone suggest a way to start implementing this?
After including the custom field in GI it doesn't populate the column with data.
The code for printing the row count is as below which is also discussed in Adding custom button in acumatica
public void SOOrder_UsrTotalTransactions_FieldSelecting(PXCache sender, PXFieldSelectingEventArgs e)
{
e.ReturnValue = GetTotalTransactions(sender);
}
// Update values
public void SOLine_RowDeleted(PXCache sender, PXRowDeletedEventArgs e)
{
UpdateTotals(sender, e.Row as SOOrder, true);
}
public void SOLine_RowInserted(PXCache sender, PXRowInsertedEventArgs e)
{
UpdateTotals(sender, e.Row as SOOrder, true);
}
public void SOLine_OrderQty_FieldUpdated(PXCache sender, PXFieldUpdatedEventArgs e)
{
UpdateTotals(sender, e.Row as SOOrder, false);
}
public void UpdateTotals(PXCache sender, SOOrder soOrder, bool isUpdateTranCount)
{
// Get SOOrder DAC extension
if (soOrder != null)
{
SOOrderExt soOrderExt = sender.GetExtension<SOOrderExt>(soOrder);
if (soOrderExt != null)
{
if (isUpdateTranCount)
{
sender.SetValueExt<SOOrderExt.usrTotalTransactions>(soOrder, GetTotalTransactions(sender));
}
}
}
}
public int? GetTotalTransactions(PXCache sender)
{
return Base.Transactions.Select().Count();
}
}
}
the DAC code is:
[PXDBInt]
[PXUIField(DisplayName="Total Lines", Enabled = false)]
If you are trying to set the value I would try a simplified version of your example like this...
namespace PX.Objects.SO
{
public class SOOrderEntry_Extension : PXGraphExtension<SOOrderEntry>
{
public void SOLine_RowDeleted(PXCache sender, PXRowDeletedEventArgs e)
{
UpdateTotals(sender, e.Row as SOOrder);
}
public void SOLine_RowInserted(PXCache sender, PXRowInsertedEventArgs e)
{
UpdateTotals(sender, e.Row as SOOrder);
}
public void UpdateTotals(PXCache sender, SOOrder soOrder)
{
if (soOrder != null)
{
SOOrderExt soOrderExt = sender.GetExtension<SOOrderExt>(soOrder);
if (soOrderExt != null)
{
sender.SetValueExt<SOOrderExt.usrRowCount>(soOrder, GetRowCount());
}
}
}
public int GetRowCount()
{
return Base.Transactions?.Select().Count() ?? 0;
}
}
}
You would use FieldSelecting to set unbound field values. Because your field is bound you do not want to call fieldselecting for your example.
New to Nokia development. I am trying to write a hello world for get GPS coordinates of my current location. What am I doing wrong here ?
public class HomeScreen extends MIDlet {
public HomeScreen() {
}
protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
}
protected void pauseApp() {
}
protected void startApp() throws MIDletStateChangeException {
Displayable current = Display.getDisplay(this).getCurrent() ;
if (current == null) {
UpdateJourney updateJourney = new UpdateJourney(this) ;
Display.getDisplay(this).setCurrent(updateJourney) ;
}
}
}
public class UpdateJourney extends Form implements CommandListener, Runnable {
private LocationProvider myLocation;
private Criteria myCriteria;
private Location myCurrentLocation;
private HomeScreen helloScreen;
private Command exitCommand;
private Thread getLocationThread = new Thread(this);;
public UpdateJourney(HomeScreen helloScreen) {
super("Taxeeta");
StringItem helloText = new StringItem("", "Taxeeta");
super.append(helloText);
this.helloScreen = helloScreen;
getLocationThread.start();
}
public double getMyLatitude() {
return myCurrentLocation.getQualifiedCoordinates().getLatitude();
}
public double getMyLongitude() {
return myCurrentLocation.getQualifiedCoordinates().getLongitude();
}
public void commandAction(Command command, Displayable arg1) {
if (command == exitCommand) {
helloScreen.notifyDestroyed();
}
}
public void run() {
myCriteria = new Criteria();
myCriteria.setHorizontalAccuracy(500);
try {
myLocation = LocationProvider.getInstance(myCriteria);
myCurrentLocation = myLocation.getLocation(60);
} catch (LocationException e) {
e.printStackTrace();
System.out
.println("Error : Unable to initialize location provider");
return;
} catch (InterruptedException e) {
e.printStackTrace();
System.out.println("Error: Waited enough for location to return");
return;
}
System.out.println("Location returned Lat:"
+ myCurrentLocation.getQualifiedCoordinates().getLatitude()
+ " Lng:"
+ myCurrentLocation.getQualifiedCoordinates().getLongitude());
exitCommand = new Command("Location returned Lat:"
+ myCurrentLocation.getQualifiedCoordinates().getLatitude()
+ " Lng:"
+ myCurrentLocation.getQualifiedCoordinates().getLongitude(),
Command.EXIT, 1);
addCommand(exitCommand);
setCommandListener(this);
}
}
In the application descriptor I had UpdateJourney as the MIDlet, I changed it to HomeScreen and it worked.
[DefaultEvent("MyCustomEvent")]
public partial class WebUserControl1 : System.Web.UI.UserControl
{
public delegate void onButtonClick(object sender, Myeventargs e);
public event onButtonClick btnHandler;
protected void ASPxButton1_Click(object sender, EventArgs e)
{
if (btnHandler != null)
{
btnHandler(this,e);
}
}
}
this code can work with
public partial class jscript : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
XFButton1.MYClick += new EventHandler(XFButton1_MYClick);
}
void XFButton1_MYClick(object sender, EventArgs e)
{
ASPxLabel1.Text = "Hello";
}
but the problem is i want it automatically generate a new event when i double click on the button. can i done this by using a web user control ?
too bad to tell you that web user control may not able to do like that... pls read this http://dotnet-framework-aspnet.itgroups.info/32/9/thread-796040.html.