CODEWITHSUNDEEP
javaandroid
Michael A
Michael A

Reputation: 5840

Creating and reading a one time created file

I want to store a list of strings in a file.

I need to create it just one time, and after that i will read and write on it programmaticlly.

My question is where in the file system should i create the file (manually) so that it will best for reading and writing ?

Thanks.

Upvotes: 0

Views: 70

Answers (4)

Chintan Raghwani
Chintan Raghwani

Reputation: 3370

if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) 
    {
         //SDcard is there
         File f=new File("/sdcard/YOURFILE.txt");
         if (!f.exists())
         {
             //File created only for first time
             f.createNewFile();
           //create inputstream and write it to your file
           OutputStream out=new FileOutputStream(f);
           byte buf[]=new byte[1024];
           int len;
           while((len=inputStream.read(buf))>0)
           out.write(buf,0,len);
           out.close();
           inputStream.close();
           System.out.println("\nData Written");
         }
         else {  //  read/ write SECOND TIME  }
  }

Upvotes: 1

Shachar Shemesh
Shachar Shemesh

Reputation: 8573

It really depends.

The problem with creating the file on the SDCard is that a special permission is required in order to access it. If the app is only for yourself, that's cool. If you want to distribute it through Google MarketPlay (or whatever it is called these days), please know that some people (myself included) tend to look at the permissions and ask "why would an app doing X require permission to do Y?", and sometimes not install the app because of it.

If the manual part is done by the app's user, by all means, store it on the sdcard. It's the only place a standard, none-root user even has access to.

Generally speaking, however, a better place to store data is in /data/data/packagename. See Android's data storage for more details.

Shachar

Upvotes: 0

Gorets
Gorets

Reputation: 2442

Add file in assets folder, then it will be clearly after new install

Upvotes: -1

Alexander
Alexander

Reputation: 48252

You can create your file in your app's directory so no one can access it but your app

getApplicationContext().getFilesDir().getAbsolutePath();

or on sd card 

File externalStorage = Environment.getExternalStorageDirectory();

if you want others to access it and, maybe, if your file is very big

If you intent to create your file manually then I think SD card is the only option unless you have a rooted phone or working with the emulator.

Upvotes: 2

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