I'm currently writing a LibGDX game and I need to open an XML file for a spritesheet. Unfortunately, when I try to open the file, I get an IOException. The files exist in the right places, the project's cleaned and up to date, etc.
Here's the kicker: LibGDX will open and display image files in the same directory, and in fact will obtain the XML file in its own FileHandle object (I've had it logcat the size and it matches up). Yet when I send the file off to a SAX parser, I get an exception leading me back to the file saying that it can't open it.
Here's the problem line of code inside the ClipSprite class:
private void parseConfigFile(FileHandle file) throws ParserConfigurationException, SAXException
{
//Use a SAX parser to get the data out of the XML file.
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser parser = factory.newSAXParser();
XMLConfigHandler handler = new XMLConfigHandler();
//Parse through the document
try
{
parser.parse(file.path(),handler); //IOException here
}
And here is the code where I select the file in the game in the create method in the main LibGDX class
//This loads a png file
texture = new Texture(Gdx.files.internal("data/graphics/CDE1/CDE1.png"));
texture.setFilter(TextureFilter.Linear, TextureFilter.Linear);
TextureRegion region = new TextureRegion(texture, 0, 0, 512, 275);
//Here I load the xml file and it tells me how many bytes it is
Gdx.app.error("File","xml bytes:"+Gdx.files.internal("data/graphics/CDE1/CDE1.xml").length());
//Here I load the same file and it crashes
//Note that it looks in the subdirectory and finds /CDE1.xml properly
animation = new ClipSprite("data/graphics/CDE1");
Error from logcat:
java.io.IOException: Couldn't open data/graphics/CDE1/CDE1.xml
Why can it identify the file, yet I still get IOExceptions about being unable to open it? Thanks for the help, and I'll provide any more information if necessary.
Just to coalesce all the comments above into a single answer in case someone else runs into this or something similar:
Try Gdx.files.local() to load your file, instead of Gdx.files.internal(), as the "internal" files are read out of the (compressed) APK and may not be "visible" like a normal file. (This depends a lot on what the code you're passing a pathname to wants to do with it.)
For a libGDX FileHandle file object use file.file() to pass a File handle, instead of file.path() to pass a String that might get misinterpreted.
For a libGDX FileHandle file use file.read() to pass an InputStream directly to the consumer (instead of passing a string or file handle and expecting them to open it).
A libGDX "internal" file maps to an Android AssetManager file, so they can be a bit wonky in some cases. Specifically, they may be compressed and stored within a .jar or .apk and not visible to traditional file reading functions.
Related
I want to copy a single json file from Unity's Assets/Resources/ directory to the internal persistent memory of Android device (INTERNAL STORAGE/Android/data/<packagename>/files/) only once at the start of the game. I looked up all over the internet, with solutions saying to use Streaming assets and UnityWebRequests or WWW class which is obsolete now. I tried everything for hours now. And did not find a exact solutions, but only got null references and directory not found.
I added my json file to the <UnityProject>/Assets/Resources/StreamingAssets/, but it doesn't seem to detect any streaming assets. I understand an apk is a zip file and so I can only read the contents of streaming assets, but my I can't find a solution to this.
Once I get my json from streaming asset, I can finally add it to Application.persistentDataPath.
UPDATE
I had actually figured it out,
public void LoadFromResources() {
{mobilePath = "StreamingAssets/"; mobilePath = mobilePath + "stickerJson" + ".json";
string newPath = mobilePath.Replace(".json", "");
TextAsset ta = Resources.Load<TextAsset>(newPath);
string json = ta.text; Debug.Log(json); System.IO.File.WriteAllText(Application.persistentDataPath + "/stickers.json", json);
}
}
To copy a file you only need to have the information of the file and then create a new one in another place.
So if you got your json file into your Resources directory you can retreive like the documentation say:
//Load text from a JSON file (Assets/Resources/Text/jsonFile01.json)
var jsonTextFile = Resources.Load<TextAsset>("Text/jsonFile01");
//Then use JsonUtility.FromJson<T>() to deserialize jsonTextFile into an object
Then you only have to create your android file in your persistentDataPath as #Iggy says in the comments doing:
System.IO.File.WriteAllText(Path.Combine(Application.persistentDataPath, "file.txt"), jsonTextFile);
Note: Not really sure, but for other cases I think that StreamingAssets folder should be inside Assets, no inside Resources.
Im currently trying to save some values in a text file in Processing Android (APDE). I want to later use this in another context, so it's important to use a complete file path. From Processing documentation for loadStrings():
... Alternatively, the file maybe be loaded from anywhere on the local
computer using an absolute path (something that starts with / on Unix
and Linux, or a drive letter on Windows)
So it must be possible.
I already searched for a answer, but never found something for Processing.
So my code is:
String[] saveData;
int score;
void setup(){
saveData=loadStrings("/storage/emulated/0/dataP/hi.txt");
score=parseInt(saveData[0]);
fullScreen();
frameRate(60);
noStroke();
noSmooth();
textAlign(CENTER);
textSize(height/20);
}
void draw(){
background(0);
fill(255) ;
text(score, width/2,height/2);
}
void mousePressed(){
score--;
saveData[0]=str(score);
println(saveData[0]);
saveStrings("/storage/emulated/0/hi.txt" ,saveData);
}
and I get the following error:
java.lang.IllegalArgumentException: File
/storage/emulated/0/dataP/hi.txt contains a path separator
I believe the confusion stems from the fact that loadStrings() method works differently for Java mode and Android mode. In Java mode, it is definitely possible to give loadStrings() an absolute Path with included separators, but in Android mode, loadStrings() will only work if you only specify a name without any separator (assumes by default to be looking into the data folder). Therefore, having any separator inside loadStrings() will throw the error.
One simple workaround you can try is to first create a separate path variable:
String path = "/storage/emulated/0/dataP/hi.txt";
And then give that as parameter to the loadStrings() method:
saveData = loadStrings(path);
If you were to use an SD card for storage, for example, you could do something like:
String SDCARD = Environment.getExternalStorageDirectory().getAbsolutePath();
File file = new File(SDCARD + File.separator + "mytext.txt");
String[] s = loadStrings(file.getPath());
As explained in the link in the comment I posted, loadStrings() and saveStrings() does not take absolute path as argument. What it means is that it can only access files with path "name.txt" and not "folder/name.txt". You have to do it using a FileInputStream and FileOutputStream if you must use absolute path. There are many examples of both these files on StackOverflow.
#Override
public void create() {
batch = new SpriteBatch();
texture = new Texture(Gdx.files.internal("data/image.png"));
sprite = new Sprite(texture);
}
Heres the main code to it. I believe I have linked the Android and the Desktop Assets folder but it still give me the error. I must have done something wrong but I don't know what. The image is located in C:\Users\Dakota Pederson\Desktop\Slingshot Steve\android\assets
Below is the full error:
Exception in thread "LWJGL Application" com.badlogic.gdx.utils.GdxRuntimeException: Couldn't load file: data/image.png
at com.badlogic.gdx.graphics.Pixmap.<init>(Pixmap.java:140)
at com.badlogic.gdx.graphics.glutils.FileTextureData.prepare(FileTextureData.java:64)
at com.badlogic.gdx.graphics.Texture.load(Texture.java:130)
at com.badlogic.gdx.graphics.Texture.<init>(Texture.java:121)
at com.badlogic.gdx.graphics.Texture.<init>(Texture.java:100)
at com.badlogic.gdx.graphics.Texture.<init>(Texture.java:92)
at com.dakotapederson.slingshotsteve.SlingshotSteve.create(SlingshotSteve.java:18)
at com.badlogic.gdx.backends.lwjgl.LwjglApplication.mainLoop(LwjglApplication.java:136)
at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:114)
Caused by: com.badlogic.gdx.utils.GdxRuntimeException: File not found: data\image.png (Internal)
at com.badlogic.gdx.files.FileHandle.read(FileHandle.java:136)
at com.badlogic.gdx.files.FileHandle.readBytes(FileHandle.java:220)
at com.badlogic.gdx.graphics.Pixmap.<init>(Pixmap.java:137)
... 8 more
Try Gdx.files.local() to load your file, instead of Gdx.files.internal(), as the "internal" files are read out of the (compressed) APK and may not be "visible" like a normal file. (This depends a lot on what the code you're passing a pathname to wants to do with it.)
For a libGDX FileHandle file object use file.file() to pass a File handle, instead of file.path() to pass a String that might get misinterpreted.
For a libGDX FileHandle file use file.read() to pass an InputStream directly to the consumer (instead of passing a string or file handle and expecting them to open it).
A libGDX "internal" file maps to an Android AssetManager file, so they can be a bit wonky in some cases. Specifically, they may be compressed and stored within a .jar or .apk and not visible to traditional file reading functions.
I'm new to android development and I am working on a little project. What I am having some issue with is getting access to preloaded files.
In my app, I have an XML file that I preloaded (I just simply put it in my src folder in a package). How do I access them in my classes? I need to get a File object pointing to this file so that I can use it as I would I/O files. It seems like this should be trivial, but alas I am stuck.
Lets say the file is located under: com.app.preloadedFiles/file1.XML
I've tried something along the lines of this, but have had no success:
URL dir_url = ClassLoader.getSystemResource("preloadedFiles/file1.XML");
FIle file = new File(dir_url.toURI());
I solved this in my app by getting an InputStream to the file -- something like:
myContext.getAssets().open(fileName);
//read the data and store it in a variable
Then, if you truly need to do File related opterations with it, you can write it to a private (or public) directory and do your operations from you newly written file. Something like:
File storageDir = myContext.getDir(directoryName, Context.MODE_PRIVATE);
File myFile = new File(storageDir + File.separator + fileName);
//then, write the data to the file and manipulate it -- store the name for access via File later
Good afternoon everyone,
I'm having a problem here with an CSV file that I wanna use to fill a dynamic table in Android.
I placed the file in the "data" folder of my emulator, and I did the following declaration to create my file variable:
file = new File("/data/Motors.csv");
I used a CSVReader class posted on another thread from this page (Link to the class) and also declared the following line to do the parse:
readerCSV = new CSVReader(new FileReader(file),';','"',0);
In the last line, the programmer to be able to create the variable has to send as parameters a Reader (Or a FileReader, it doesn't make a difference), the separator char, the quote char and the number of how many lines the CSV reader has to skip.
The problem comes that no matter in which directory (Not even in the root directory, which Java tells me that it's "/" through the file.getAbsolutePath(); method) it always gets to the point when the program throws the FileNotFoundException and I'm getting a bit frustrated because I have 2 days already with this problem.
If someone could please help me to get a bit of orientation of what I should do to get the file from the right directory... It would be a lot of help and I can go further with the code I have to finish.
Many thanks in advance!!!!
EDIT
I found a solution to open my file:
I have used 2 file variables: one gets the rout of the External Storage Directory (see first answer in the following link) and the other is declared as a new file, like the following lines in the code:
route = Environment.getExternalStorageDirectory();
file = new File(route,"Motors.csv");
Later I used again the CSV reader class that I found, where the first parameter is from the FileReader type (Sorry #Rajesh, but I couldn't use your alternative because you passed a FileDescription parameter from the AssetManager to the CSV reader class and then I had to change the whole class and that didn't help my problem at all).
Now I don't get the exception at all!!
There are various Storage Options in Android. Files can be stored in internal and external storages. If the CSV file is a static resource, you could think of bundling the file in the "assets" folder of your project.
If you are using the "assets" route, the following code segment can get you a CSVReader.
AssetManager am = getAssets();
AssetFileDescriptor afd = am.openFd ("Motors.csv");
FileDescriptor fd = afd.getFileDescriptor();
readerCSV = new CSVReader(fd, ';','"',0);
The above code snippet doesn't perform error/exception handling, please remember to take care of that. You need to copy the Motors.csv file to the "assets" folder within the project.