I'm having a problem with opening file using PDFViewer library.
Inside DocumentCreator class:
1. First I create the document using iText library and it works perfectly fine and it writes document to the given directory.
2. Then I create an object of a File to display it using PDFViewer.
try {
mDocument = new Document(); // new Document created
String path = "/" + FirebaseAuth.getInstance().getCurrentUser().getUid() + "-" + recipe.getTitle() + ".pdf";
String fullPath = Environment.getExternalStorageDirectory() + "/recipes" + path;
mPdfWriter = PdfWriter.getInstance(mDocument, new FileOutputStream(fullPath));
doTheWriting(recipe, activity);
Log.d("OK", "done");
mMyRecipeFile = new File(fullPath);
}
catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Inside same class (DocumentCreator) I created getter method for mMyRecipeFile.
public File getRecipeFile() {
return mMyRecipeFile;
}
After that in the DocumentTestFragment,
I created PDFView, called mPdfView, and I try to open this file.
mPdfView.fromFile(mDocCreator.getRecipeFile());
The problem is it is displaying an empty document, which is weird, because I opened Android Device Monitor, opened given file and it's not empty.
I found out what caused a problem. The thing is that I wrote:
PdfView.fromFile(file)
While proper form is
PdfView.fromFile(file).load();
It works just fine now.
Related
Everyone keeps saying how simple it is to move a file from point a to point b using fileutils, but I'm having lots of trouble moving a file :(
I have a /temp/ folder in the directory wherever the .jar is located, in this temp folder I have a .txt file I want to move up a directory (so basically next to the .jar file) but I cant seem to do it?
Here's some code, but I know its not even close:
public void replaceFile() {
String absolutePath = getPath();
Path from = Paths.get(absolutePath + "\\temp\\test.txt");
Path to = Paths.get(absolutePath + "\\test.txt");
try {
FileUtils.moveFile(FileUtils.getFile(from.toAbsolutePath().toString()), FileUtils.getFile(to.toAbsolutePath().toString()));
JOptionPane.showMessageDialog(null, "test");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public String getPath() {
File jarDir = new File(ClassLoader.getSystemClassLoader().getResource(".").getPath());
//JOptionPane.showMessageDialog(null, jarDir.getAbsolutePath());
return jarDir.getAbsolutePath();
}
Any help is appreciated :\
Why don't use this Java API for Moving a File or Directory
Files.move(from, to, StandardCopyOption.REPLACE_EXISTING);
UPDATE
Looking at your source code I suggest the following implementation:
Path from = Paths.get(absolutePath, "/temp/test.txt");
Path to = Paths.get(absolutePath, "/test.txt");
try {
Files.move(from, to, StandardCopyOption.REPLACE_EXISTING);
JOptionPane.showMessageDialog(null, "test");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
ok i managed to do it, apparently the getPath() method returned some funny path and it failed there, so heres a code that works
public void downloadJar() {
String absolutePath = getPath();
String from = absolutePath + "\\temp\\test.txt";
String to = absolutePath + "\\test.txt";
File fileTo = new File(to);
File fileFrom = new File(from);
try {
FileUtils.moveFile(fileFrom, fileTo);
JOptionPane.showMessageDialog(null, "test");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
JOptionPane.showMessageDialog(null, "io exce");
}
}
public String getPath() {
return System.getProperty("user.dir");
}
thanks everyone
This error occurs every time i try to write a file with any of the available libraries such as opencsv or itext etc . Please tell me how to resolve it. Sometimes removing bootstrap entries work but i need to be able to make it work in an android application project
What about this? (just pulled it from my own file creation in my Android app)
/**
* Creates a new file in the directory
* #param sFilePath
* #param sFileName
*/
public static void CreateFile(String sFilePath, String sFileName)
{
try
{
File fileDir = new File(sFilePath);
fileDir.mkdirs();
File f = new File(fileDir, sFileName); // if the file already exists it will be overwritten
f.createNewFile();
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
I know that this is a widely discussed question , but I am really confused with those examples provided on android developers manual .
So , I have a "source.txt" in my res/raw folder .For example I want to write 2 lines in it(for ex. Hello\nWorld) and then read them from another activity. Can anyone write the source code for this , please.
You should replace your .txt file to your extornal or internal storage.And You must give permission for write text from androidManifest.xml
for reading file you can do this
public String readFile(String filePath) {
String jString = null;
StringBuilder builder = new StringBuilder();
File yourFile = new File("/sdcard/" + filepath);
if (yourFile.exists()) {
Log.i("file", "file founded");
BufferedReader bufferedReader = null;
try {
bufferedReader = new BufferedReader(new FileReader(yourFile));
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String row = "";
try {
while ((row = bufferedReader.readLine()) != null) {
builder.append(row + "\n");
}
bufferedReader.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
jString = builder.toString();
}
else {
Log.i("FAIL", "FILE NOT FOUND");
}
return jString;
}
for writing file you can use this
public void writetoFile(String filename,String text) {
File file = new File("/sdcard/" + filename);
if (!file.exists())
try {
file.createNewFile();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
FileWriter fileWriter;
try {
//you can change second parametre true or false this is about append or clean and write
fileWriter = new FileWriter(file, false);
BufferedWriter bufferedWriter = new BufferedWriter(fileWriter);
bufferedWriter.append(jsonText);
bufferedWriter.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
Whatever is in your APK file is read-only, therefore you are unable to write to file stored in res/raw source folder as it is still in your APK. if you want to work on file shipped with your app, you need to copy if to internal storage or SD card from APK first so that would allow you to alter the content.
Every file in your apk is read only, so you need to create the file in your internal storage or SD Card. If you just want to send small amount to of data to second activity, you can send data along with intent or use sharedPreference.
If you really want to read and write data to/from SD card then you need to use FileInputStream and OutputStreamWriter to read/write data to a file. Check this tutorial here to see how it's done. http://www.java-samples.com/showtutorial.php?tutorialid=1523
Trying to create and write to a file, but i get a FileNotFoundException every time, here is the method i am using:
public void saveFileAsPRN(Context context){
byte[] dataFile = getPrintableFileData();
String filename = "TestPrn.prn";
// instantiate a file object using the path
File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), filename);
Log.e(TAG, Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).toString());
//determine if the media is mounted with read & write access
String state = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(state)) {
Log.e(TAG, "media mounted"); //good
}else{
Log.e(TAG, "media NOT mounted"); //bad
}
//create directory if it does not exist
//the default Download directory should always exist
if (!file.mkdirs()) {
Log.e(TAG, "Directory not created");
}
// determine if the file exists, create it if it does not
if(!file.exists()){
try {
Log.e(TAG, "File does not exist, creating..");
file.createNewFile();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}else{
Log.e(TAG, "File Exists");
}
//this makes the blank file visible in the file browser
MediaScannerConnection.scanFile(context, new String[]{Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).toString() + "/" + filename}, null, null);
//create output stream - send data; saving to file
OutputStream out = null;
try {
FileOutputStream fos = null;
fos = new FileOutputStream(file); // <---- CRASHES HERE; FileNotFoundException
out = new BufferedOutputStream(fos);
out.write(dataFile);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
try {
out.flush();
out.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
A FileNotFoundException is raised on the following line:
fos = new FileOutputStream(file); // <---- CRASHES HERE;
The directory Exists, and a blank file is created in the target directory (visible by browsing target folder on PC).
Calling the method canWrite() on the File object returns true - i have write access.
The manifest contains: android.permission.WRITE_EXTERNAL_STORAGE"
So i'm out of ideas, i see several people have similar issues, but i cant find an answer.
Commenting out the following code fixed the issue:
//create directory if it does not exist
//the default Download directory should always exist
if (!file.mkdirs()) {
Log.e(TAG, "Directory not created");
}
that code does create a blank file, you can see it contained in the folder,
BUT - it's very misleading; you can't do anything with this file, i tried transferring it from my device to my PC and i couldn't, i also cannot open it. and you cannot open a stream to it in code.
Try this may helps you.
Replace this line
File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), filename);
With
File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).getAbsolutePath(), filename);
I have the problem, that I create a new file in a Java program, but I always get an exception, that the new created file is not local, when I try to open it on the eclipse project explorer view.
The code where I create it is as follows:
IWorkspaceRoot workspaceRoot = ResourcesPlugin.getWorkspace().getRoot();
IProject project = workspaceRoot.getProject(projectName);
FileUtil myFile = new FileUtil();
if (!project.getFile(FILE_NAME).exists()) {
IFile newFile = project.getFile("conf.txt");
FileInputStream fileStream = null;
try {
String temp = project + "/conf.txt";
temp = temp.substring(2);
fileStream = new FileInputStream(temp);
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
newFile.create(fileStream, false, null);
} catch (CoreException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
// create closes the file stream, so no worries.
try {
myFile.writeTextFile(FILE_NAME, "Seconds", output);
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
FileUtil is a class which only implements the methods write and read for the file.
The Exception I get when I try to open it begins with:
org.eclipse.core.internal.resources.ResourceException: Resource '/ProjectE1/conf.txt' is not local.
at org.eclipse.core.internal.resources.Resource.checkLocal(Resource.java:353)
at org.eclipse.core.internal.resources.File.getContentDescription(File.java:264)
at org.eclipse.core.internal.propertytester.FilePropertyTester.testContentType(FilePropertyTester.java:108)
I somehow have to get a relative path during the runtime. Because I am opening a new instance of eclipse in the program, where I can see the Project in the Project Explorer but can't open the conf.txt file because it is not local.
It looks like your resource is an absolute path to /ProjectE1/conf.txt, I'm confused why you are not using java.io.
This will help you understand relative paths, I think this may be where you are wanting to put your conf file.
File file = new File("conf.txt");
if(!file.createNewFile()){
//err
}
System.out.println(file.getAbsolutePath());
I had similar issue. This is how I fixed.
First created file in local file system (using java.io)
Did project refresh
Reload the file
File file = new File(project.getWorkspace().getRoot().getLocation() + project.getFullPath().toString() + "/relative_path_of_my_file");
file.createNewFile();
project.refreshLocal(IProject.DEPTH_INFINITE, null);
keywordFile = project.getFile("/relative_path_of_my_file");