On Fri, Dec 24, 2010 at 8:12 PM, Mystique <[email protected]> wrote:
> String[] lv_arr;
>
> for(int i=1; i<11; i++){
> lv_arr[i] = "hello";
> }
>
> When I toast the value of lv_arr[i] it is null.
>
If this is your actual code, you need to initialize the array.
String[] lv_arr = new String[11];
Second, array indexing is zero-based, so you would start your loop from 0
and go to 9 (where i < 10).
>
> If I do this:
>
> String[] lv_arr = {"hello", hello", "hello"} + the for loop, I can get the
> hello value when I do the toast. but [3]-[10] is still null value.
>
You've initialized an array to exactly three elements. Anything after that
(index 3 and above) is non-existent.
These are really basic Java concepts. If you don't understand this, I highly
recommend you go study Java on it's own and figure this stuff out before
trying to do an Android project. You're going to run into a lot of headaches
if you try to learn both at the same time.
-------------------------------------------------------------------------------------------------
TreKing <http://sites.google.com/site/rezmobileapps/treking> - Chicago
transit tracking app for Android-powered devices
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