FileConnection c = (FileConnection) Connector.open("file:///c:/myfile.txt",Connector.READ_WRITE);
if (c.exists())
{
System.out.println("exist");
}
else {
System.out.println("no exist");
c.create();
}
OutputStream out = c.openOutputStream();
PrintStream output = new PrintStream( out );
output.println( response );
out.close();
c.close();
in the above code I m getting the following error:
no exist
java.io.IOException: Root is not accessible
at com.sun.midp.io.j2me.file.Protocol.ensureConnected(Protocol.java:1588)
at com.sun.midp.io.j2me.file.Protocol.ensureOpenAndConnected(Protocol.java:1604)
at com.sun.midp.io.j2me.file.Protocol.create(Protocol.java:945)
at hello.Midlet.traverse(Midlet.java:83)
at hello.Midlet.startApp(Midlet.java:40)
at javax.microedition.midlet.MIDletProxy.startApp(MIDletProxy.java:43)
at com.sun.midp.midlet.Scheduler.schedule(Scheduler.java:374)
at com.sun.midp.main.Main.runLocalClass(Main.java:466)
at com.sun.midp.main.Main.main(Main.java:120)
The file file:\\c:\myfile.txt exists. How do i go about now ?
Looks like you need to set the MIDLet Permissions.
Note you might get this working on the simulator but you will need signed code at least to get working on a real device.
Related
I'm trying to access JSON on remote server. The code works on a local replica of the database but on the server there is a "HTTP Web Server: Command Not Handled Exception" error. I have lotusscript agents doing similar things so I am thinking it is a problem with java permissions on the server.
As far as I can tell I have all permissions on the server to run the code. I've tried putting the code in to Javascript and a Java managed bean so don't think it is an issue with the code.
The server is running 11.0.1FP1 (I've read there may be issues with pol files in 11)
Any help or hints would be greatly received
public String getJSON(String url)
{
String returnCode = url;
try {
String jsonTxt = null;
URL myURL = new URL(url);
HttpURLConnection myURLConnection = (HttpURLConnection) myURL.openConnection();
if (myURLConnection.getResponseCode() < 400) {
returnCode = "Connection made";
} else {
/* error from server */
jsonTxt = "Can not access remote server";
returnCode = "Connection not made";
}
myURLConnection.disconnect();
} catch(Exception e) {
e.printStackTrace();
}
return returnCode;
}
I our app (Xamarin C#) we download files from a server. At the end of a succeful download we get the URI to the newly-downloaded file and from the URI we get the file path:
Android.Net.Uri uri = downloadManager.GetUriForDownloadedFile(entry.Value);
path = u.EncodedPath;
In Android 4.4.2 and in Android 5 the uri and path look like this:
uri="file:///storage/emulated/0/Download/2.zip"
path = u.EncodedPath ="/storage/emulated/0/Download/2.zip"
We then use path to process the file.
The problem is that in Android 6 (on a real Nexus phone) we get a completely different uri and path:
uri="content://downloads/my_downloads/2802"
path="/my_downloads/2802"
This breaks my code by throwing a FileNotFound exception. Note that the downloaded file exists and is in the Downloads folder.
How can I use the URI I get from Android 6 to get the proper file path so I can to the file and process it?
Thank you,
donescamillo#gmail.com
I didn't get your actual requirement but it looks like you want to process file content. If so it can be done by reading the file content by using file descriptor of downloaded file. Code snippet as
ParcelFileDescriptor parcelFd = null;
try {
parcelFd = mDownloadManager.openDownloadedFile(downloadId);
FileInputStream fileInputStream = new FileInputStream(parcelFd.getFileDescriptor());
} catch (FileNotFoundException e) {
Log.w(TAG, "Error in opening file: " + e.getMessage(), e);
} finally {
if(parcelFd != null) {
try {
parcelFd.close();
} catch (IOException e) {
}
}
}
But I am also looking to move or delete that file after processing.
May you an build your URI with the download folder :
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).toURI();
It's work. #2016.6.24
#Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if(DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals( action)) {
DownloadManager downloadManager = (DownloadManager)context.getSystemService(Context.DOWNLOAD_SERVICE);
long downloadId = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, 0);
DownloadManager.Query query = new DownloadManager.Query();
query.setFilterById(downloadId);
Cursor c = downloadManager.query(query);
if(c != null) {
if (c.moveToFirst()) {
int columnIndex = c.getColumnIndex(DownloadManager.COLUMN_STATUS);
if (DownloadManager.STATUS_SUCCESSFUL == c.getInt(columnIndex)) {
String downloadFileUrl = c.getString(c.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI));
startInstall(context, Uri.parse(downloadFileUrl));
}
}
c.close();
}
}
}
private boolean startInstall(Context context, Uri uri) {
if(!new File( uri.getPath()).exists()) {
System.out.println( " local file has been deleted! ");
return false;
}
Intent intent = new Intent();
intent.addFlags( Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setAction( Intent.ACTION_VIEW);
intent.setDataAndType( uri, "application/vnd.android.package-archive");
context.startActivity( intent);
return true;
}
I am using the below code to upload image. The problem is that after uploading the image i cant change the file permission. my file permission set by default is rw-r--r-- (0644). Is it possible to change the file permission or set it as 0777 by default? It works fine in my local system. But not able to change the permission in my linux server.
<%
try
{
int filesize=0;
String fieldname="",fieldvalue="",filename="",content="",bookid="",bkdescription="";
try {
List<FileItem> items = new ServletFileUpload(new DiskFileItemFactory()).parseRequest(request);
for (FileItem item : items) {
if (item.isFormField()) {
fieldname = item.getFieldName();
fieldvalue = item.getString();
if(fieldname.equals("homeid")){
bookid=fieldvalue;
}
if(fieldname.equals("bkdescription")){
bkdescription=fieldvalue;
}
} else {
try{
fieldname = item.getFieldName();
filename = FilenameUtils.getName(item.getName());
InputStream filecontent = item.getInputStream();
filesize=(int)item.getSize();
filename="literal_"+bookid+".jpg";
if(filesize>0){
byte[] b=new byte[filesize];
int c=0;
File f=new File(getServletConfig().getServletContext().getRealPath("/")+"/imagesX");
String filePah=getServletConfig().getServletContext().getRealPath("/")+"/imagesX";
if(f.isDirectory())
{
String fl[]=f.list();
for(int i=0;i<fl.length;i++)
{
File fd=new File(getServletConfig().getServletContext().getRealPath("/")+"/imagesX/"+fl[i]);
if(fd.getName().equals(filename))
fd.delete();
}
}
if(!f.exists())
{
new File(filePah).mkdir();
f.mkdir()
}
java.io.FileOutputStream fout=new java.io.FileOutputStream(getServletConfig().getServletContext().getRealPath("/")+"/imagesX/"+filename);
while((c = filecontent.read(b)) != -1 )
{
fout.write(b, 0, c);
}
fout.close();
filecontent.close();
}
}catch (Exception e) {
System.out.println("Exception in creation of file :"+e);
}
}
}
} catch (FileUploadException e) {
throw new ServletException("Cannot parse multipart request.", e);
}
}
catch(Exception exp)
{
out.println(exp);
}
%>
You cannot change the file permission from inside java code.
Your system's default umask is set to 0644 for new file. It wouldn't be good idea to change the default umask.
What you need is to do is set the permission of your directory to 0777 and then redefine your directory's ACL to recursive, so all new file created inside will inherit the same permission.
Heres a link which shows how to go about -
https://superuser.com/questions/151911/how-to-make-new-file-permission-inherit-from-the-parent-directory
An alternative solution is to change the permissions externally with a system command, chmod.
Example:
public static void runCmd (String[] cmd) {
try {
Process p = Runtime.getRuntime().exec(cmd);
BufferedReader r = new BufferedReader(
new InputStreamReader (
p.getInputStream()
)
);
} catch(Exception e) {
}
}
runCmd(new String[] {
"/bin/chmod",
"755",
"/path/to/your/script"
});
P.S. were you also trying to call Java from a stored proc in an Oracle database?
I'm trying to record an audio file and play it, but I'm getting en error: Locator does not reference a valid media file. What am I missing?
here is my code of saving audio file:
//Stop recording, capture data from the OutputStream,
//close the OutputStream and player.
_rcontrol.commit();
_data = _output.toByteArray();
_output.close();
_player.close();
isRecording = 0;
try {
FileConnection fc = (FileConnection)Connector.open("file:///store/home/user/Audio.mp3");
// If no exception is thrown, then the URI is valid, but the file may or may not exist.
if (!fc.exists()) {
fc.create(); // create the file if it doesn't exist
}
OutputStream outStream = fc.openOutputStream();
outStream.write(_data);
outStream.close();
fc.close();
System.out.println("audio size: "+_data.length);
I can see in log, that my audio file has some length (about 5000 after 3-4 seconds of recording)
here is my code where i'm trying to play it:
FileConnection fc = (FileConnection)Connector.open("file:///store/home/user/Audio.mp3");
// If no exception is thrown, then the URI is valid, but the file may or may not exist.
if (fc.exists()) {
_player = Manager.createPlayer("file:///store/home/user/Audio.mp3");
_player.realize();
_player.prefetch();
if (_player.getMediaTime() == _player.TIME_UNKNOWN) {
System.out.println("zero audio doration");
}
else {
System.out.println("audio doration: "+_player.getMediaTime());
}
_player.start();
}
fc.close();
I am trying to write code in J2ME for the Nokia SDK (S60 device) and am using Eclipse.
The code tries to play some wav files placed within the "res" directory of the project. The code is as follows:
InputStream in1 = null;
System.out.println("ABout to play voice:" + i);
try {
System.out.println("Getting the resource as stream.");
in1 = getClass().getResourceAsStream(getsound(i));
System.out.println("Got the resouce. Moving to get a player");
}
catch(Exception e) {
e.printStackTrace();
}
try {
player = Manager.createPlayer(in1, "audio/x-wav");
System.out.println("Created player.");
//player.realize();
//System.out.println("Realized the player.");
if(player.getState() != player.REALIZED) {
System.out.println("The player has been realized.");
player.realize();
}
player.prefetch();
System.out.println("Fetched player. Now starting to play sound.");
player.start();
in1.close();
int i1 = player.getState();
System.out.println("Player opened. Playing requested sound.");
//player.deallocate();
//System.out.println("Deallocated the player.");
}
catch(Exception e) {
e.printStackTrace();
}
}
Where the function getSound returns a string that contains the name of the file to be played. It is as follows:
private String getSound(int i) {
switch(i) {
case 1: return "/x1.wav";
case 2: return "/x2.wav";
}
}
My problem is this:
1. When I try to add more than 10 sounds, the entire application hangs right before the prefetch() function is called. The entire system slows down considerably for a while. I then have to restart the application.
I have tried to debug this, but have not gotten any solutions so far. It would be great if I could get some help on this.
The problem lies in the emulator being used for the project. In the emulation tab in the Run Configurations window, the following Device must be selected:
Group: Nokia N97 SDK v1.0
Device: S60 Emulator
Changing to the above from Devices listed under the Sun Java Wireless Toolkit solved the problem.