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    <p>It appears that what they are doing is breaking the file down into two lists (or String arrays, in this case), one which contains all the even-numbered lines, and one which contains all the odd-numbered lines. I'll comment up the code for you:</p> <pre><code>public static String[][] ReadFilePerLine(Context context, String nom) { int i = 0; try { //open the specified input file and create a reader FileInputStream fIn = context.openFileInput(nom); InputStreamReader ipsr = new InputStreamReader(fIn); BufferedReader b = new BufferedReader(ipsr); //get the total number of lines in the file, and allocate //a buffer large enough to hold them all i = getLineNumber(context, nom); String[][] s = new String[2][i/2]; i = 0; //set the current line to 0 String ligne; int j = 0; //set the section index to 0 //now read through the lines in the file, and place every //even-numbered line in the first section ('s[0]'), and every //odd-numbered line in the second section ('s[1]') while ((ligne = b.readLine()) != null) { if (i % 2 == 0) //even-numbered line, it goes into the first section s[0][j] = ligne; else { //odd-numbered line, it goes into the second section s[1][j] = ligne; j++; //increment the section index } i++; //increment the line count } //done, cleanup and return fIn.close(); ipsr.close(); return s; } catch (Exception e) { //should at least log an error here... } } </code></pre> <p>As to why they chose to use a String[][], I cannot say. Probably for convenience, since they want a single object that they can return from this function that contains both lists. Personally I would use a Map that has two List instances in it, but the String[][] works just as well and is probably marginally more efficient.</p> <p>Judging from your example data it does not appear that you need to use this format. But if you want to use it, you need to structure your data so that the key is on one line, and its associated value is on the next, like:</p> <pre><code>date 2011-03-19 userName someGuy </code></pre>
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    1. POI'm not understanding the following code
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    1. POI'm not understanding the following code
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    1. CO@aroth: so to have the right diplay in the ListView with this format, i have to add a "\n" after every variable ? :\ !
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    2. COPlus i don't know why he used a string [][] variable! he just had to use a string varible ! no ? plus the display is very difficul, for even and odd numbers(number of lines in the file!), useless, no ?
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    3. COYes, you would need to have a "\n" after every key and after every value. And you're correct, a file with an odd number of lines will break this code, but if the file is correctly formatted it should not ever contain an odd number of lines. Each variable being stored should have exactly two lines associated with it. And of course, values that contain literal newlines in them will completely break this format, unless the newlines are manually escaped or otherwise sanitized.
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