Android :: Parsing Speed / Reading Vs Converting Input Stream To String?

Jul 23, 2009

I'm downloading text data from a web server, and getting an Input Stream. The data will be relatively large and delimited. I want to split this data by the deliminator and store each piece in the DB. Is it faster to read the Input Stream byte by byte to split the data and store each piece in the DB, or would it be faster to convert the Input Stream to a String and use an existing function such as Split?

Android :: Parsing Speed / Reading Vs Converting Input Stream to String?


Android :: IO Exception While Reading From Input Stream?

Aug 13, 2009

I'm running into a strange problem while reading from an Input Stream on the Android platform. I'm not sure if this is an Android specific issue, or something I'm doing wrong in general. The only thing that is Android specific is this call:
Input Stream is = getResources().openRawResource(R.raw.myfile);
This returns an Input Stream for a file from the Android assets. Anyways, here's where I run into the issue:
bytes[] buffer = new bytes[2];
is.read(buffer);
When the read() executes it throws an IOException. The weird thing is that if I do two sequential single byte reads (or any number of single byte reads), there is no exception. Ie, this works:
byte buffer;
buffer = (byte)buffer.read();
buffer = (byte)buffer.read();
Any idea why two sequential single byte reads work but one call to read both at once throws an exception? The Input Stream seems fine... is.available() returns over a million bytes (as it should).
Stack trace shows these lines just before the Input Stream.read():
java.io.IOException
at android.content.res.AssetManager.readAsset(Native Method)
at android.content.res.AssetManager.access$800(AssetManager.java:36)
at android.content.res.AssetManager$AssetInputStream.read(AssetManager.java:542)
Changing the buffer size to a single byte still throws the error. It looks like the exception is only raised when reading into a byte array.
If I truncate the file to 100,000 bytes (file is: 1,917,408 bytes originally) it works fine. Is there a problem with files over a certain size?

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Android :: How Do I Replace HTML Escapes In An Input Stream Before Parsing It To XML?

Sep 17, 2010

I have an input stream which is being converted to XML, and read. When I get down to some text elements in the XML, they are truncated. I believe the parser is dropping everything after escaped HTML such as & Here is the code getting the input stream and then getting the text element. Code...

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Android : Unable To Use XML Reading / Parsing

Nov 14, 2009

I have a big problem with the XML parsing in Android. I can't use it at the following XML file: Code...

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Android :: Reading / Parsing Call DTMF

Aug 11, 2010

im testing case for reading and acting upon DTMF Tone reviced from a seession call,is this possible ??

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Android :: Same Value When Converting From String To Float

Jul 8, 2010

I have a JSON Object with a latitude and longitude String on which I get the values doing this: String latitude = picInfo.getString("latitude"); String longitude = picInfo.getString("longitude");Then I convert them to floats like this: float latInt = Float.valueOf(latitude).floatValue(); float longInt = Float.valueOf(longitude).floatValue();And place them on a GeoPoint like this: GeoPoint X = new GeoPoint((int) (latInt*1E6),(int) (longInt*1E6) ); Debugging this values I can see JAVA approximates the values, is there anyway to keep them exactly the same?

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Android :: Converting Base64 String To Image

May 25, 2010

Is there any way that I can convert a base64 String to image in Android. I am receiving this base64 String in a xml from the server connected through socket.

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Android :: Converting Base64 Byte Array To String

Feb 16, 2009

Im trying to convert a byte array which is in Base64 format to String as below. Data was not assigned properly to the String. Do I need to pass the encoding type while creating the new String?

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Converting String To Charsequence?

Aug 17, 2010

I'm looking for a way to convert a string to a charsequence.

My code is:

Code:
public void randText(int r){

r++; //necessary increment

String rs = Integer.toString(r); //random string[code]....

The random int r is created outside the method. This method gives a random string, from my resource file. All of the strings have names q1,q2,q3,... There will be 100+ such strings.

This doesnt work at all. the setText(cs) line fails. Is there any way to convert string -> charsequence? Or to have it read as a resource file and not a string?

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Android :: Input Fields / Converting Text To Numeric

Nov 4, 2010

I have an app I am working on that does some math on a few variables and outputs the answer. Well that's the plan anyway. Being a total n00b at Android & Java I am not sure of a couple of things.1) I have created text fields in the layout file for user to enter values. Instead of text fields should I use numerical value fields, if such a thing exists? 2) How can you convert from a text field to a numerical value and back again?

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Android :: Retrieving XML / Stream From HTTP (Parsing XML)

May 4, 2010

What are the best practices parsing XML from an HTTP resource in Android? I've been using HttpURLConnection to retrieve an InputStream, wrapping it with a BufferedInputStream, and then using SAX to parse the buffered stream. For the most part it works, though I do receive error reports of SocketTimeoutException: The operation timed out or general parsing error. I believe it's due to the InputStream. Would using HttpClient instead of HttpURLConnection help? If yes, why? Should the stream be output to a file, having the file parsed instead of the stream?

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Android :: Parsing Date String Error In 2.0 Emulator

May 17, 2010

I have a simple test code for testing SimpleDateFormat. This code works well on Eclipse and Android 1.5 emulator, but it failed at Android 2.0 emulator. Does anyone know why? Thanks.

public class TemplateActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
TextView tv = new TextView(this);..........................

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Android : Incredible Bug Reading A Network Stream

Aug 11, 2009

First, sorry but my English is bad. I'm developing an app for android. I use a function (see below) for transfer a file on the network. removed some code...

Two situation: -S1: in is get from a socket and out is a locale file -S2: in is the local file and out is get from a socket

Well ! S1 and S2 work on the emulator. But, on a real device, S1 make some problem. The file is mixed :/ ! For example i would to transfer this text: "123456789ABCDEF 123456789ABCDEF 123456789ABCDEF 123456789ABCDEF 123456789ABCDEF 123456789ABCDEF 123456789ABCDEF" But i receive this: "123456789ABCDEF 12345678923456789ABCDEF 123456789ABCDEF 123456789ABCDEF 12345678ABCDEF 123456789ABCDEF 123456789ABCDEF 123456789" (not really a real example) The content received have same size as the source. Look at this: "123456789ABCDEF" is send and "12345678ABCDEF" is received.

How does it is possible ? Someone can help me?

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Android :: Reading Binary File From Sdcard Using Stream Classes

Oct 5, 2010

Can anybody have any idea how to read a binary file which resides in sdcard using Streams, like Inputstream, CountingInputStream or SwappedDataInputStream?I am using these three streams to read a file which is currently in the Resouces folder, but now i want to move that file in sdcard but I cannot change these stream because I have done so much work on it and I cannot roll back my work.i am doing it this way but its giving me FileNotFoundException.

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Android :: How To Get Input Stream Of An Xml File Which Is Placed Under /res / Xml?

May 16, 2010

I know when the xml file is under /res/raw,I can do this by context.getResources().openRawResource(rid); but when the xml file is under /res/xml,how can I do it? You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscribe@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en

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Android :: String Input For Speech Engine

Jan 7, 2010

It seems to me that the method "speak" of class TextToSpeech only works in method onInit or on Utterance Completed. However, onInit and onUtteranceCompleted don't have any parameter for passing strings. In the following code, I tried to define a global string arraylist outside the methods and used the arraylist for string input.For some reason , it didn't work out.But the engine did speak "did you sleep well". public class TTS extends Activity implements OnInitListener,OnUtteranceCompletedListener,Runnable ArrayList<String> content=new ArrayList<String>();
int MY_DATA_CHECK_CODE=50;
private TextToSpeech mTts;
public void onCreate(Bundle savedInstanceState) {
content.add("test");
content.add("another test");
super.onCreate(savedInstanceState);
setContentView(R.layout.splash);
Intent checkIntent = new Intent();
checkIntent.setAction(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA);
startActivityForResult(checkIntent, MY_DATA_CHECK_CODE);
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == MY_DATA_CHECK_CODE) {
if (resultCode == TextToSpeech.Engine.CHECK_VOICE_DATA_PASS) {
// success, create the TTS instance
mTts = new TextToSpeech(this,this);
} else { // missing data, install it
Intent installIntent = new Intent();
installIntent.setAction(
TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);
startActivity(installIntent);
} public void onInit(int status){
if(status==TextToSpeech.SUCCESS){
mTts.setLanguage(Locale.US);
mTts.setOnUtteranceCompletedListener(this);
String myText1 = "Did you sleep well?";
mTts.speak(myText1, TextToSpeech.QUEUE_FLUSH, null);
for(int i=0;i<content.size();i++){
mTts.speak(co

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Android :: How To Pass String Like Input Of A Activity

Feb 17, 2010

I want to pass a String like the input of a new activity, to let this one use the String some operations. The code I try is this..

And in the activity I try to recover it:

String textout = savedInstanceState.getString("contactcode");

In the onCreate part. I have seen that uris are normally used, but I don't know how to pass that String by using a URI.

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Android :: How To Load A Typeface From An Input Stream?

Mar 15, 2010

The class Typeface has a couple of static factory methods which take different inputs. However, Input streams are not among themn (there is a way to load a file though). Is there a way around this apart from copying the font to a temporary file?

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Android :: Getting File Size Before Input Stream

Aug 12, 2010

I want to create a progress Bar for an FTP download. The server where I am downloading the file has all of its directories and files hidden. I want to display the progress of the download. Is there any way I can get the file size? Here is my current code:
FTP client = new FTP Client();
FTP client.setListHiddenFiles
FTP client.connect(host Part);
FTP client.login(user Name, password);
FTPclient.setFileType(FTP.BINARY_FILE_TYPE);
Input Stream instream = FTP client.retrieveFileStream(pathExcludingHostIncludingFirstSlash);
int l;
byte[] tmp = new byte[2048];
int update Counter = 0;
int bytes Downloaded = 0;
while ((l = instream.read(tmp)) != -1) {
Foss.write(tmp, 0, l);
bytes Downloaded+=2048;
update Counter++;
if(update Counter==3){
kilobytes Downloaded=(bytes Downloaded / 1024);
publish Progress((String[])null);
update Counter=0}

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Android :: Resetting A HTTP Input Stream?

Jan 9, 2010

I am getting the input of a web page using Input Stream in = httpConnection.getInputStream(); I then use the XmlPullParser to check if an error has occurred. If no error has occurred, I then want to reset the Input Stream back to the beginning so that I can parse it through another function I have created. I tried in.reset(); but this does not work. Is this possible?

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Android :: Chunked Encoding - GZIP Input Stream

Mar 3, 2010

I found a problem with GZIP input stream when wrapping InputStream from HttpURLConnection. When the server response with Transfer- Encoding=chunked, Content-Encoding=gzip and Connection=Keep-Alive. The second post always return -1. After digging into the source code, I found the place that could be a bug: InflaterInputStream.java (line 190 to 192) if (inf.needsInput()) { fill(); } Because InflaterInputStream doesn't need more input, it doesn't try to read the end of chunked encoding (0x)(30 0a 0d) that cause the second post to return with -1 every time.

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Android :: Buffered Input Stream Buffer Size

Jul 5, 2010

I use BufferedInputStream in my code: socket = new Socket(ip, Integer.parseInt(port)); socket.setReceiveBufferSize(64000); output = socket.getOutputStream(); input = new BufferedInputStream(socket.getInputStream(), 64000); I read incoming packets like this: if (input.available() != 0) { System.out.println("Get Packet: " + input.available() + " bytes"); byte[] b = new byte[input.available()]; input.read(b); incParser(b); }

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Android :: Convert InputStream To String With Encoding Given In Stream Data?

May 20, 2010

My input is a InputStream which contains an XML document. Encoding used in XML is unknown and it is defined in the first line of XML document.
From this InputStream, I want to have all document in a String.

To do this, I use a BufferedInputStream to mark the beginning of the file and start reading first line. I read this first line to get encoding and then I use an InputStreamReader to generate a String with the correct encoding.

It seems that it is not the best way to achieve this goal because it produces an OutOfMemory error.

Any idea, how to do it ? code...

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Android :: Change Internal Buffer Size Of Data Input Stream

Apr 1, 2010

I'm using this kind of code for my TCP/IP connection:

sock = new Socket(host, port);
sock.setKeepAlive(true);
din = new DataInputStream(sock.getInputStream());
dout = new DataOutputStream(sock.getOutputStream());

Then, in separate thread I'm checking din.available() bytes to see if there are some incoming packets to read. The problem is, that if a packet bigger than 2048 bytes arrives, the din.available() returns 2048 anyway. Just like there was a 2048 internal buffer. I can't read those 2048 bytes when I know it's not the full packet my application is waiting for. If I don't read it however - it'll all stuck at 2048 bytes and never receive more. Can I enlarge the buffer size of DataInputStream somehow? Socket receive buffer is 16384 as returned by sock.getReceiveBufferSize() so it's not the socket limiting me to 2048 bytes. If there is no way to increase the DataInputStream buffer size - I guess the only way is to declare my own buffer and read everything from DataInputStream to that buffer?

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Android :: Read Local Xml File Is Resource Folder As A Input Stream In Android?

Aug 12, 2010

I am trying to get a input stream from something like this.

CODE:.........

And then call parse on the parser instance i Created. SOm how i get nothing . Works fine if I use a server XML....

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Android :: Logcat View Fails With - Could Not Create The View - For Input String - Our

Sep 30, 2009

I have a problem with my DDMS in eclipse. In the logcat view appears only this failure: Logcat View fails with "Could not create the view: For input string: "our" "

I uninstalled and reinstalled the adt and ddms already without any change. I can use the logcat in the command line (tools- adt logcat) but this is not as comfortable as using the logcat in eclipse.

More details of this failure message are:

CODE:...............

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Android :: Why Is My Input Stream Not Working In Android?

Aug 23, 2010

I'm writing an image file up loader for android for my favorite image gallery software and it uses FTP.
I've started using Apache-Commons Net FTP as my ftp library based on past stack overflow questions. Like so:
FTP Client ftp = new FTP Client();
try{
ftp.connect(host);
Log.i(TAG,"we connected");
if(!ftp.login(user,pass)){
ftp.logout();
//TODO: alert user it didn't happen
return;
}
String reply Status = ftp.get Status();
Log.i(TAG,reply Status);
int reply Code = ftp.triplicate();
if (!FTPReply.isPositiveCompletion(reply Code))
{
ftp.disconnect();
//TODO: alert user it didn't happen
return;}
Log.i(TAG,"we logged in");
ftp.changeWorkingDirectory(path);
ftp.setFileType(ftp.BINARY_FILE_TYPE);
for(int i = 0; i < content Uris.size(); i++){
Log.i(TAG,"uploading new file");
Uri stream = (Uri) content Uris.get(i);
//InputStream in = openFileInput(getRealPathFromURI(stream));
Input Stream in =this.getContentResolver().openInputStream(stream);
BufferedInputStream buffing=null;
buffing=new BufferedInputStream(in);
ftp.setFileType(ftp.BINARY_FILE_TYPE);
boolean Store = ftp.storeFile("test.jpg", buffing);
Log.i(TAG, "uploaded test");

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Android :: Any Tools To Convert Iphone Localized String File To String

Jun 29, 2010

I have the localized strings file that is used in the Iphone app that I work on to port to Android. Are there any tools that go through the file taken from the xcode project and build the xml needed to use the strings in android? This tool should be easy to build but I appreciate any pointers to already working tools.

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Android :: Java Datetime Values From String To Long To String

Oct 1, 2010

In Android, capturing date from datepicker and storing as string in sqlite. Sorting by date doesn't work because they're strings (unless I'm doing it wrong.I've googled this issue for ~5 days, and it looks like there should be a way to capture the date from the date picker, convert it to a Long, store it in sqlite as a Long, select and sort on the Long date value, then convert the Long back to a "mm/dd/yyyy" string for display. I've tried various combinations of parse statements, Date, FormatDate, etc. with no luck at all.On activity start, get today's date and display it in button which calls the datepicker.Capture new date from datepicker (if one is entered), save it as a long to sqlite.On opening an activity showing a listview of records, select from sqlite with orderby on date (Long), convert Long to "mm/dd/yyyy" string for display in ListView.

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Android :: Access The String Values Of String Resources Statically

May 5, 2009

If there's anyway way I to access the String values of String resources statically? e.g. a static equivalent of Context.getString(...)?

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