OrderBy in android custom object list

Question

I have a list of my own class object in android class.

I want to do two things with that list.

First I want to Apply order by like this I used to do with C# code.

myList.orderby(x => x.energyLevel);

Secondly I want to fetch some data from that list. Like this

myList.where(x=>x.gender=="male");

How to do this in android?

TCA's answer covers sorting. Check this post thread for filtering options: http://stackoverflow.com/questions/122105/what-is-the-best-way-to-filter-a-java-collection. Unfortunately, Android's Java doesn't support lambdas yet. — Mike M., Jul 26 '14 at 07:03
yes it is but it is only for string type i want to sort by my variable which is Double — Yawar, Jul 26 '14 at 07:57
it says: "Type mismatch: cannot convert from boolean to int" — Yawar, Jul 26 '14 at 09:34
(int)obj2.energylevel - (int)obj1.energylevel solved my problem :) for ascending order use (int)obj1.energylevel - (int)obj2.energylevel — Yawar, Jul 26 '14 at 10:05

score 1 · Answer 1 · answered Jul 26 '14 at 06:48

1

orderby using ArrayList in android

  Collections.sort(myList, new Comparator<MyListObj>(){
  public int compare(MyListObj obj1, MyListObj obj2) {
    return obj1.x.compareToIgnoreCase(obj2.x);
  }
});

answered Jul 26 '14 at 06:48

Arun C

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couldn't understand that, what this will do ? – Yawar Jul 26 '14 at 07:07
this will sort myList according to compare() http://docs.oracle.com/javase/6/docs/api/java/util/Collections.html#sort(java.util.List) – Arun C Jul 26 '14 at 07:10
thats great but what if my obj1.x type is double? – Yawar Jul 26 '14 at 07:35
actually my obj1.energyLevel type is double – Yawar Jul 26 '14 at 07:56

OrderBy in android custom object list

1 Answers1