how to display the sorted list in listview after user presses the sort button? - android

I am making an Simple Android App to test the sorting capability and then use it on my main project that I will be making.
I want to know that suppose I display a list of items to the user with the help of custom objects and custom ArrayAdapter in the listview and there I want to place a sorting button that will sort the list during runtime according to the choice of the user (ex: alphabetically, according to ratings,etc.).
How to display the new list to the user after sorting.
Should I again use the setAdapter method or is there any other way?


When you click Sort Button , perfom sorting on the list , and in the next line write
yourAdapter.notifyDatasetChanged();
it will update your list with the updated(sorted) Data.


First of all, sort your source data base on the choice of the user (ex: alphabetically, according to ratings,etc.)
Ex:
List<String> mData; // your source data
// sort your data ascending order
Collections.sort(mData);
// use your adapter to update your ListView
mArrayAdapter.notifyDataSetChanged();


If you call notifyDatasetChanged() in your adapter your list will be redrawn in the right order in the screen. :) So after you order you list, call adapter.notifyDatasetChanged()

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Hey. I have the following code:
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