Develop Reference

How to find directory for File Output Stream in Android app?

I have an app which gets data from an Arduino via bluetooth. The data are written into various ArrayLists and saved in files afterwards. Here is the code:
public boolean SaveValues(ArrayList<String> arrayList1, ArrayList<String> arrayList2, String valueType, String timeStart, String timeStop) {
String filename = "File_" + valueType + "_" + timeStart + " bis " + timeStop;
FileOutputStream outputStream = null;
if(arrayList1.size() == 0)
return false;
try {
outputStream = openFileOutput(filename, Context.MODE_PRIVATE);
for (int i = 0; i < arrayList1.size(); i++) {
outputStream.write(arrayList1.get(i).getBytes());
outputStream.write("\n".getBytes());
outputStream.write(arrayList2.get(i).getBytes());
outputStream.write("\n".getBytes());
}
outputStream.close();
return true;
} catch (FileNotFoundException e) {
e.printStackTrace();
return false;
} catch (IOException e) {
e.printStackTrace();
return false;
} finally {
if (outputStream != null) {
try {
outputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
I also save the valuetype, timeStart and timeStop into a database to be able to find the files. My problem is, that somehow the table where I save these values got deleted, so I am not able to find the files in the app. I would like to find the files maybe on the phone or something. Actually, I just need the filenames to be able to open them in the app, because they contain data I need. So, where can I find these files?
I have tried searching in the phones files. The files, and all the other apps data, should be saved in Android/data/package-name but I can't find the package name in Android/data. I also tried to search for "File_" in the files, because that's what every one of my files start with. But no file gets found.

How to detect out of vocabulary word in CMU Sphinx

I am having a problem with the Sphinx voice recognition library for Java. I am using it to get input and handle it. In the grammar file , I wrote like this:
#JSGF V1.0;
grammar hello;
public <sentence> = (play | pause | next | previous);
My grammar is simple , just includes 4 words : "play" , "pause" , "next" , "previous". I have used Sphinx to detect them sucessfully . But I want my app to show a message like : "Unrecognized word" when I speak some words that do not belong to the grammar. Currently, For example, if I speak to the microphone a not belong to the grammar like :"stop" , it still show up the word that it detects that it is the nearest result.
My code is like this :
public class SphinxDemo {
static int i = 1;
static String resultText;
public static void main(String[] args) {
try {
URL url;
if (args.length > 0) {
url = new File(args[0]).toURI().toURL();
} else {
url = SphinxDemo.class.getResource("helloworld.config.xml");
}
System.out.println("Loading...");
ConfigurationManager cm = new ConfigurationManager(url);
Recognizer recognizer = (Recognizer) cm.lookup("recognizer");
Microphone microphone = (Microphone) cm.lookup("microphone");
/* allocate the resource necessary for the recognizer */
recognizer.allocate();
/* the microphone will keep recording until the program exits */
if (microphone.startRecording()) {
System.out
.println("Say: play|pause|previous|next");
while (true) {
System.out
.println("Start speaking. Press Ctrl-C to quit.\n");
Result result = recognizer.recognize();
if (result != null) {
System.out.println("Enter your choise" + "\n");
resultText = result.getBestFinalResultNoFiller();
System.out.println("You said: " + resultText + "\n");
}
if(!(resultText.equalsIgnoreCase("play") || resultText.equalsIgnoreCase("previous") || resultText.equalsIgnoreCase("pause")||resultText.equalsIgnoreCase("next"))){
System.out.println("Unrecognized word\n");
}
}
} else {
System.out.println("Cannot start microphone.");
recognizer.deallocate();
System.exit(1);
}
} catch (IOException e) {
System.err.println("Problem when loading SphinxDemo: " + e);
e.printStackTrace();
} catch (PropertyException e) {
System.err.println("Problem configuring SphinxDemo: " + e);
e.printStackTrace();
} catch (InstantiationException e) {
System.err.println("Problem creating SphinxDemo: " + e);
e.printStackTrace();
}
}
}
I have tried to add something like this to detect unrecognized word but it does not work:
if(!(resultText.equalsIgnoreCase("play") || resultText.equalsIgnoreCase("previous") || resultText.equalsIgnoreCase("pause")||resultText.equalsIgnoreCase("next"))){
System.out.println("Unrecognized word\n");
}

If you use latest cmusphinx, it will return <unk> when word is not in the grammar.

better regular expression for matching strings?

I have a "moreinfo" Directory which has some html file and other folder. I am searching the file in the moreinfo directory( and not sub directory in moreinfo) matches with toolId*.The names of the file is same as toolId],
Below is a code snippet how i writing it, In case my toolId = delegatedAccess the list returns 2 file (delegatedAccess.html & delegatedAccess.shopping.html) based on the wide card filter(toolId*)
Is their a better way of writing the regular expression that check until last occurring period and return the file that matches exactly with my toolId?
infoDir =/Users/moreinfo
private String getMoreInfoUrl(File infoDir, String toolId) {
String moreInfoUrl = null;
try {
Collection<File> files = FileUtils.listFiles(infoDir, new WildcardFileFilter(toolId+"*"), null);
if (files.isEmpty()==false) {
File mFile = files.iterator().next();
moreInfoUrl = libraryPath + mFile.getName(); // toolId;
}
} catch (Exception e) {
M_log.info("unable to read moreinfo" + e.getMessage());
}
return moreInfoUrl;
}

This is what i end up doing with all the great comments. I did string manipulation to solve my problem. As Regex was not right solution to it.
private String getMoreInfoUrl(File infoDir, String toolId) {
String moreInfoUrl = null;
try {
Collection<File> files = FileUtils.listFiles(infoDir, new WildcardFileFilter(toolId+"*"), null);
if (files.isEmpty()==false) {
for (File mFile : files) {
int lastIndexOfPeriod = mFile.getName().lastIndexOf('.');
String fNameWithOutExtension = mFile.getName().substring(0,lastIndexOfPeriod);
if(fNameWithOutExtension.equals(toolId)) {
moreInfoUrl = libraryPath + mFile.getName();
break;
}
}
}
} catch (Exception e) {
M_log.info("unable to read moreinfo" + e.getMessage());
}
return moreInfoUrl;
}

Zxing - UPC +5 Supplement Barcode Detection

I have been attempting to use Zxing 2.3.0 to read images of UPC barcodes with a +5 supplement in java however i cannot read the supplement portion of the barcode. The code successfully reads the first portion only. After searching multiple websites i cannot find any further indications of how to read the supplement other than my current method. Any help would greatly be appreciated.
public static void main(String[] args) {
decodeUPC5();
}
public static void decodeUPC5(){
InputStream barCodeInputStream = null;
try {
barCodeInputStream = new FileInputStream("C:/Users/apoclyps/git/zxing-barcoder/Zxing-Test/img/upc5.png");
} catch (FileNotFoundException e) {
e.printStackTrace();
}
BufferedImage barCodeBufferedImage = null;
try {
barCodeBufferedImage = ImageIO.read(barCodeInputStream);
} catch (IOException e) {
e.printStackTrace();
}
LuminanceSource source = new BufferedImageLuminanceSource(barCodeBufferedImage);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
// Attempting to read UPC + 5 Supplement
GenericMultipleBarcodeReader multiReader = new GenericMultipleBarcodeReader(new MultiFormatReader());
try {
multiReader.decodeMultiple(bitmap);
} catch (NotFoundException e1) {
e1.printStackTrace();
}
Result[] result = null;
try {
result = multiReader.decodeMultiple(bitmap);
} catch (NotFoundException e) {
e.printStackTrace();
}
System.out.println("Results length "+result.length);
for(Result r : result ){
System.out.println("Barcode text is " + r.toString());
}
}
Barcode image!
Output
Results length 1
Barcode text is 9780735200449

Keep in mind that the content of the barcode is 9780735200449 and not 9780735200449 51299. It will always (correctly) return the 9780735200449 as the contents of the barcode.
The +5 extension is returned as ResultMetadata, under key ResultMetadatatype.UPC_EAN_EXTENSION.
Note that it will still return the UPC barcode even if it doesn't see a +5 extension, obviously. So it's possible you would see it return without a +5 extension on this image. However it works for me with the app and so would imagine it easily detects the +5. (If you scan with the app, look at the left for "Metadata $12.99")

How to deal with corrupted files that were created but IOException occured?

Could you please suggest how to deal with these situations ? I understand that in the second example, it is very rare that it would happen on unix, is it ? If access rights are alright. Also the file wouldn't be even created. I don't understand why the IOException is there, either it is created or not, why do we have to bother with IOException ?
But in the first example, there will be a corrupted zombie file. Now if you tell the user to upload it again, the same thing may happen. If you can't do that, and the inputstream has no marker. You loose your data ? I really don't like how this is done in Java, I hope the new IO in Java 7 is better
Is it usual to delete it
public void inputStreamToFile(InputStream in, File file) throws SystemException {
OutputStream out;
try {
out = new FileOutputStream(file);
} catch (FileNotFoundException e) {
throw new SystemException("Temporary file created : " + file.getAbsolutePath() + " but not found to be populated", e);
}
boolean fileCorrupted = false;
int read = 0;
byte[] bytes = new byte[1024];
try {
while ((read = in.read(bytes)) != -1) {
out.write(bytes, 0, read);
}
} catch (IOException e) {
fileCorrupted = true;
logger.fatal("IO went wrong for file : " + file.getAbsolutePath(), e);
} finally {
IOUtils.closeQuietly(in);
IOUtils.closeQuietly(out);
if(fileCorrupted) {
???
}
}
}
public File createTempFile(String fileId, String ext, String root) throws SystemException {
String fileName = fileId + "." + ext;
File dir = new File(root);
if (!dir.exists()) {
if (!dir.mkdirs())
throw new SystemException("Directory " + dir.getAbsolutePath() + " already exists most probably");
}
File file = new File(dir, fileName);
boolean fileCreated = false;
boolean fileCorrupted = false;
try {
fileCreated = file.createNewFile();
} catch (IOException e) {
fileCorrupted = true;
logger.error("Temp file " + file.getAbsolutePath() + " creation fail", e);
} finally {
if (fileCreated)
return file;
else if (!fileCreated && !fileCorrupted)
throw new SystemException("File " + file.getAbsolutePath() + " already exists most probably");
else if (!fileCreated && fileCorrupted) {
}
}
}

I really don't like how this is done in Java, I hope the new IO in Java 7 is better
I'm not sure how Java is different than any other programming language/environment in the way you are using it:
a client sends some data to your over the wire
as you read it, you write it to a local file
Regardless of the language/tools/environment, it's possible for the connection to be interrupted or lost, for the client to go away, for the disk to die, or for any other error to occur. I/O errors can occur in any and all environments.
What you can do in this situation is highly dependent on the situation and the error that occured. For example, is the data structured in some way where you could ask the user to resume uploading from record 1000, for example? However, there is no single solution that fits all here.