How to search a .txt file and retrieve data

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Making a android application where user would an ID, then click submit. Using that id it will search the text file and if found it would display the content in separate textviews.

txt file would look like this, with each content separated by a comma (",")

541,BoB,05-18-2014
483,Phil,01-19-1992
971,Komarov,10-30-1858

The text file is located in the res/raw/players.txt

Have an onClick handler for the button. I'm a little unsure of what type of reader I should use and how to search its contents. After I do successfully get the search to function I will be adding content to file. So far I have,

Java

try {
        Resources res = getResources();
        InputStream ins = res.openRawResource(R.raw.players);
        byte[] b = new byte[ins.available()];
        ins.read(); 

    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        System.out.print("error, cant read");
    }

Posted 2-Nov-14 7:03am

Member 11200256

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PIEBALDconsult 2-Nov-14 13:14pm

You would likely have an easier time of it if you used XML rather than unstructured text.

Member 11200256 2-Nov-14 13:25pm

of course it would be. Put thats how the assignment is required. :)

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Ullas_Krishnan · Answer 1 · 2014-11-02T07:42:00

Hi,

Its better to go for XML or JSON because many libraries are available..

If yo still need to go for txt file...

Then you can go for using StringTokenizer or BufferedReader.

After reading it in to string use "split" extract the content or data.

C#

BufferedReader br = new BufferedReader(new FileReader(file));
String line;
while ((line = br.readLine()) != null) {
   // do stuff
}
br.close();

You can also use OpenCSV library for working with CSV files..

Thanks,
Ullas Krishnan

Xiao Ling · Answer 2 · 2014-11-02T14:21:00

Solution 2

You can read the inputstream line by line:

Java

BufferedReader reader = new BufferedReader(new InputStreamReader(ins));
String line = null;
while ((line = reader.readLine()) != null) {
    // TODO:

}
reader.close();

Posted 2-Nov-14 14:21pm

Xiao Ling