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phonegap displaying text in native textbox

I'm making an android app which uses bluetooth using phonegap and I'm having issues handling code because it get's called every 100ms.
I want to try if the issue occurs because my phonegap javascript code is to long causing delays.
To try this I want to dispaly the received message using a native textbox.
Is this possible? and How would I do this?
Thanks
Martijn
PS: I've tried using Toast but since I want to change the displayed value every 100ms this doesn't work.
Code
upon receiving a message this is the order the code is processed
bytes = mmInStream.read(buffer);
s_message = new String(buffer, 0, bytes);
String[] strArray = s_message.split(",");
mHandleReceivedThread = new HandleReceivedThread(strArray);
mHandleReceivedThread.start();
In the HandleReceivedThread:
if(strArrayReceived[0].startsWith("Pressure"))
{
if(strArrayReceived[1].contains("Pressure"))
{
double Pressure = Double.parseDouble(strArrayReceived[1].replace("Pressure", ""));
double PressureResult = Pressure/10;
String PressureValue = String.valueOf(PressureResult);
webView.sendJavascript("PressureValue = " + Pressure + ";");
webView.sendJavascript("document.getElementById('Pressure').innerHTML = " + PressureValue + ";");
Log.e(TAG, "Message fail: " + strArrayReceived[1] );
}
else
{
double Pressure = Double.parseDouble(strArrayReceived[1]
double PressureResult = Pressure/10;
String PressureValue = String.valueOf(PressureResult);
webView.sendJavascript("PressureValue = " + Pressure + ";");
webView.sendJavascript("document.getElementById('Pressure').innerHTML = " + PressureValue + ";");
}
}
this is basically what happens.
And this happens every 100ms , and for some reason the displaying of the Value has lag and sometimes the received message (which should be "Pressure,1500" , or a different value) is Pressure,1500Pressure , causing errors (which I've managed to fix). but this still isn't optimal.
The message is send correctly and if I use a simple chat app they are received correctly.
if there is anything else I should supply , just ask ;-)

Java How to get the time when timer is stopped?

I'm currently referring to this link to create the timer for my program.
But I don't know how to get the time when timer is stopped.
I think System.getcurrentTimeMillis() cannot be used at this moment.
So, how can I get the current time when timer is stopped with the method mentioned?
EDIT :
I'm currently building a simple 4X4 memory game, and I have timer in my program, using the method from this link.
At the end of the game, I'll use a showMessageDialog to display the number of clicks and time used. However, I'm just able to display the clicks, which is the easiest part.
Based on the method from the link, I think I can use an easy way such as
JOptionPane.showMessageDialog( null, "Congratulations. \n You have win the game with " + click + " click(s) in " + hour + "hour(s) " + minute + " minute(s) " + second + " second(s).", "Win", 1);
Is there any better way of doing it?

You can use
Date d = new Date();
DateFormat df = new SimpleDateFormat("hh:mm:ss");
String dateStr = df.format(d);

java: default number-formatting

I have a program that does algorithmic calculations with some number-output. I want this output to look nice and the program still being fast. I used the DecumalFormat but this makes it so slow, but works.
Is there a way to set the default number output so I wouldnt need DecimalFormat???
Locale deLocale = new Locale("de_DE");
// should be format: ###,###.### 123.456,789 de_DE
Locale.setDefault (deLocale);
double f=-123456.123458998;
System.out.println (""+f+""); // I wourld expect -123.456,123
// but the output is -123456.123458998
any ideas?? thanks!
chris

You need to look at the Customizing Format.
You need a ###,###.### - de_DE pattern.
String pattern= "###,###.###";
DecimalFormat myFormatter = new DecimalFormat(pattern);
double f=-123456.123458998;
String output = myFormatter.format(f);
System.out.println(f+ " " + pattern + " " + output);
EDIT : Use Predefined format, in case you don't want your own pattern.

Java: List Cameras that are Plugged In

My program currently gets a list of drives plugged into the computer with File.listRoots(). But, when I plug a camera or an MP3 player into the computer directly (instead of inserting the memory card), it's not listed, nor does it have a drive letter in Windows Explorer. For example, here's the location of my camera:
Computer\Canon PowerShot SD750\Removable storage
How can I also list cameras/other devices that do not have a drive letter? I assume this will require a JNI library of some sort, but I don't know for sure obviously.
Thanks!
P.S. Out of desperation, I did try to list the contents of Computer\; it didn't work of course.
Update: I found this question here: Portable Device Path on Windows ; that's exactly the problem I'm having, but there is no solution laid out there.

Java 7 has some promising looking classes in this area, like this one:
http://download.java.net/jdk7/docs/api/java/nio/file/FileSystem.html
Assuming that you need it to work on Java 6 as well, I would suggest running a shell script and parsing its output.
On Windows you could run mountvol, on Unix/MacOS X mount etc. Of course parsing the output would be somewhat tedious and you would have to worry about every OS your app runs on, but hey, at least... not sure what.... it works?
Here is some sample code which seems helpful on Windows:
strComputer = "."
Set objWMIService = GetObject("winmgmts:" _
& "{impersonationLevel=impersonate}!\\" & strComputer & "\root\cimv2")
Set colItems = objWMIService.ExecQuery("Select * from Win32_Volume")
For Each objItem In colItems
WScript.Echo "Automount: " & objItem.Automount
WScript.Echo "Block Size: " & objItem.BlockSize
WScript.Echo "Capacity: " & objItem.Capacity
WScript.Echo "Caption: " & objItem.Caption
WScript.Echo "Compressed: " & objItem.Compressed
WScript.Echo "Device ID: " & objItem.DeviceID
WScript.Echo "Dirty Bit Set: " & objItem.DirtyBitSet
WScript.Echo "Drive Letter: " & objItem.DriveLetter
WScript.Echo "Drive Type: " & objItem.DriveType
WScript.Echo "File System: " & objItem.FileSystem
WScript.Echo "Free Space: " & objItem.FreeSpace
WScript.Echo "Indexing Enabled: " & objItem.IndexingEnabled
WScript.Echo "Label: " & objItem.Label
WScript.Echo "Maximum File Name Length: " & objItem.MaximumFileNameLength
WScript.Echo "Name: " & objItem.Name
WScript.Echo "Quotas Enabled: " & objItem.QuotasEnabled
WScript.Echo "Quotas Incomplete: " & objItem.QuotasIncomplete
WScript.Echo "Quotas Rebuilding: " & objItem.QuotasRebuilding
WScript.Echo "Serial Number: " & objItem.SerialNumber
WScript.Echo "Supports Disk Quotas: " & objItem.SupportsDiskQuotas
WScript.Echo "Supports File-Based Compression: " & _
objItem.SupportsFileBasedCompression
WScript.Echo
Next
Here is the output I got for my ebook reader:
Automount: True
Block Size: 4096
Capacity: 999120896
Caption: G:\
Compressed:
Device ID: \\?\Volume{8e3b4ce5-a124-11e0-9d2b-e30c5839642d}\
Dirty Bit Set: False
Drive Letter: G:
Drive Type: 2
File System: FAT32
Free Space: 663683072
Indexing Enabled:
Label: PocketBook9
Maximum File Name Length: 255
Name: G:\
Quotas Enabled:
Quotas Incomplete:
Quotas Rebuilding:
Serial Number: 1276177233
Supports Disk Quotas: False
Supports File-Based Compression: False

The solution to above problem using JMTP library on
http://code.google.com/p/jmtp/
Here is my code
package jmtp;
import be.derycke.pieter.com.COMException;
import be.derycke.pieter.com.Guid;
import java.io.*;
import java.math.BigInteger;
import jmtp.PortableDevice;
import jmtp.*;
public class Jmtp {
public static void main(String[] args) {
PortableDeviceManager manager = new PortableDeviceManager();
PortableDevice device = manager.getDevices()[0];
// Connect to my mp3-player
device.open();
System.out.println(device.getModel());
System.out.println("---------------");
// Iterate over deviceObjects
for (PortableDeviceObject object : device.getRootObjects()) {
// If the object is a storage object
if (object instanceof PortableDeviceStorageObject) {
PortableDeviceStorageObject storage = (PortableDeviceStorageObject) object;
for (PortableDeviceObject o2 : storage.getChildObjects()) {
//
// BigInteger bigInteger1 = new BigInteger("123456789");
// File file = new File("c:/JavaAppletSigningGuide.pdf");
// try {
// storage.addAudioObject(file, "jj", "jj", bigInteger1);
// } catch (Exception e) {
// //System.out.println("Exception e = " + e);
// }
//
System.out.println(o2.getOriginalFileName());
}
}
}
manager.getDevices()[0].close();
}
}
Donot forget add jmtp.dll files (that comes up with jmtp download) as a native library for more info see my answer on
http://stackoverflow.com/questions/12798530/including-native-library-in-netbeans

This may not be the answer you're looking for, but is assigning them to a drive letter not an option? You can usually manually do this with USB devices on Windows using My Computer > right-click > Manage > Storage.
It's possible that CaptureDeviceManager in JMF (java media framework) could help you but I kind of doubt it.

Maybe you can take a look at Morena Framework http://www.gnome.sk/Twain/jtp.htmlv (seems to be open source, but a little expensive; though there is a free evaluation version), it is for TWAIN compatible scanners/cameras (Windows/MAC) or SANE compatible (Linux or other unix flavor), to get a list of connected devices, you can do this:
import SK.gnome.morena.*;
import SK.gnome.twain.*;
public class Test
{
public static void main(String[] args) throws Exception
{
TwainSource[] sources=TwainManager.listSources();
if(sources == null) return;
for(int i = 0; i < sources.length; i++)
{
System.out.println("Twain source is: " + ts.toString());
}
}
}
Maybe that could help,if not I think maybe JMF is a possible solution.

How can I pipe input to a Java app with Perl?

I need to write a Perl script that pipes input into a Java program. This is related to this, but that didn't help me. My issue is that the Java app doesn't get the print statements until I close the handle. What I found online was that $| needs to be set to something greater than 0, in which case newline characters will flush the buffer. This still doesn't work.
This is the script:
#! /usr/bin/perl -w
use strict;
use File::Basename;
$|=1;
open(TP, "| java -jar test.jar") or die "fail";
sleep(2);
print TP "this is test 1\n";
print TP "this is test 2\n";
print "tests printed, waiting 5s\n";
sleep(5);
print "wait over. closing handle...\n";
close TP;
print "closed.\n";
print "sleeping for 5s...\n";
sleep(5);
print "script finished!\n";
exit
And here is a sample Java app:
import java.util.Scanner;
public class test{
public static void main( String[] args ){
Scanner sc = new Scanner( System.in );
int crashcount = 0;
while( true ){
try{
String input = sc.nextLine();
System.out.println( ":: INPUT: " + input );
if( "bananas".equals(input) ){
break;
}
} catch( Exception e ){
System.out.println( ":: EXCEPTION: " + e.toString() );
crashcount++;
if( crashcount == 5 ){
System.out.println( ":: Looks like stdin is broke" );
break;
}
}
}
System.out.println( ":: IT'S OVER!" );
return;
}
}
The Java app should respond to receiving the test prints immediately, but it doesn't until the close statement in the Perl script. What am I doing wrong?
Note: the fix can only be in the Perl script. The Java app can't be changed. Also, File::Basename is there because I'm using it in the real script.

I've grown rather fond of the IO::Handle derived modules. They make it easy to control flushing, reading data, binary mode, and many other aspects of a handle.
In this case we use IO::File.
use IO::File;
my $tp = IO::File->new( "| java -jar test.jar" )
or die "fail - $!";
# Manual print and flush
$tp->print( 'I am fond of cake' );
$tp->flush;
# print and flush in one method
$tp->printflush( 'I like pie' );
# Set autoflush ON
$tp->autoflush(1);
$tp->print( 'I still like pie' );
Also, since the file handle is lexically scoped, you don't have to close it manually. It will automatically close when it goes out of scope.
BTW, unless you are targeting a perl older than 5.6, you can use the warnings pragma instead of -w. See perllexwarn for more info.

$|=1 only works on the currently selected file handle (by default, STDOUT). To make your TP file handle hot you need to do this after opening it:
select(TP);
$| = 1;
select(STDOUT);