Referencing files in Android - android

Why can't I refer to a PDF file in my Android device?
I have a folder named "templates" in the root folder, and I have a PDF file in that. I've tried to refer to the file via the following:
File file = new File("/templates/myPDFFile.pdf");
but when I try to print file.exists(), it always returns me false.
Just as further information, my file hierarchy is:
root
-src
-com.example.text
-MyActivity.java
-templates
-MyPDFFile.pdf
and my code is stored in MyActivity.java.
How do I reference accurately to the PDF file?


You must put it in assets and get it from there like :
How to open a pdf stored either in res/raw or assets folder?

Related

I get file not found exception trying to open a linked file in my assets folder (android)

I have a file in my assests folder, that I imported using the 'link' option (as opposed to copy). I use the following code to open it, but I get a file not found exception.
super.onCreate(savedInstanceState);
setContentView(R.layout.bar_page_lo);
appContext = getApplicationContext();
InputStream ins;
ins = appContext.getResources().getAssets().open("bar-data.json");
I need it to be linked because the file is in a dropbox folder so that my colleague can edit it. is there something special I need to do to use a linked file?

try:
appContext.getResources().openRawResource(R.raw.bar-data);
File must be placed in raw folder.

(Android) Read matlab file from assets

I use the jmatIO library to read a .mat file. In plain java I can set the path to the matFileReader like this
MatFileReader mfr = new MatFileReader("/theta-phi_small_param5.mat");
and I can have access to all the .mat data. Inside the android i put the .mat file to the assets folder and I tried to access it like this
mfr = new MatFileReader("file:///assets/theta-phi.mat");
but it doesn't work. How can I get the path to the mat file inside the assets folder so to read it with the MatFileReader?

Does the MatFileReader accept an InputStream? If so you can do it like this:
InputStream in = getAssets().open("theta-phi.mat");
It might also work to use:
File file = new File("file:///android_asset/theta-phi.mat");
UPDATE: Since MatFileReader doesn't support InputStream and the File solution above doesn't work I guess your best bet is to copy the file from the Assets folder to your apps External/Internal storage and from there access the file.

Android: get route of file

I need the route of a pdf file in my Android Project.
The file could be in raw or in assets folder.
I need to get the route because I must call using the File Class
Ex: File file = new File(path);
Thanks
Image:
http://img19.imageshack.us/img19/2303/capturaww.png

I am not quite sure what you mean, assuming you want to read to PDF file in your assets (res file) look here
Access PDF files from 'res/raw' or assets folder programmatically to parse with given methods
But if you want to get the file path of a folder, then look here
how to get file path from sd card in android
How to get the file path from URI?
Here is an example of how to get a file path (taken from the third link)
File myFile = new File(uri.toString());
myFile.getAbsolutePath()

File not found issue in Android

I need to access myfile.txt file using FileReader in Android , please suggest me where to add the text file in Eclipse. I tried it adding it in Resource and Asset but I am getting File not found issue.
FileReader fr = new FileReader("myfile.txt");
Even
File ff = new File("myfile.txt");
File Supports only the below listed parameters
FileReader Supports only the below listed parameters
Note: I want solution for this issue , only with FileReader or File

The directory would be /res/raw/ this is where you put all your extra resources.
you can refer to it using getResources().openRawResource(resourceName)
and check here Android how to get access to raw resources that i put in res folder?
EDIT:
how can i edit the text files in assets folder in android
in short
the easiest way would be to copy the file to external directory then do your stuff there
link is here
Android: How to create a directory on the SD Card and copy files from /res/raw to it?
One thing to mention - prior to 2.3 the file size in the assets cannot exceed 1MB.
hope it helps abit

That's how I obtain my file from the SD card, perhaps this can be some use to you.
String state = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(state)) {
File options = new File(getAppDirectory(), "portal.xml");
}
The getAppDirectory method used in the bit of code looks like this :
private String getAppDirectory() {
return new String(Environment.getExternalStorageDirectory().toString()
+ "/foldername/foldername/");
}
After this bit of code I also make sure the file exists and what not before I attempt to read from it.

How can I edit the text files in assets folder in Android?

I am using a text file in the assets folder in Android. I would like to change the data inside that text file dynamically. I am trying to open the file as follows:
FileOutputStream fos=this.getAssets().openNonAssetFd("data.txt").createOutputStream();
But it is generating the error: java.io.FileNotFoundException: This file can not be opened as a file descriptor; it is probably compressed. Please help me to edit this file. Thank you very much.

Writing into /assets directory at runtime? AFAIK that's not possible.
You can put the original file in /assets, and at the first application run copy it over to the /sdcard.

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