Add String to adapter

Question

I have an adapter and i want to add a string to it but when i run this code it only add the last string in the songstoadd variable ... That is a custom adapter which adds dividers in where neccessary but in the Array Adapter i want to a all of the strings that have the same first letter in their name ....

SeparatedListAdapter adapter = new SeparatedListAdapter(this);
     ArrayList<String> songstoadd = new ArrayList<String>();

              Collections.sort(songtitle);
              int m = 0;
              while( m <songtitle.size()-1){
                  if(songtitle.get(m).substring(0, 1) == songtitle.get(m+1).substring(0, 1)){
                      m++;
                  }else{
                   songstoadd.clear();
                   songstoadd.add(songtitle.get(m));

                adapter.addSection(songtitle.get(m).substring(0, 1), new ArrayAdapter<String>(getApplicationContext(),R.layout.song, songstoadd));

              m++;
                  }



      }
              setListAdapter(adapter);

        }

i think you need to convert Arraylist to String[] array – Nikunj Patel Nov 22 '11 at 09:28 — Nikunj Patel, Nov 22 '11 at 09:28
Look at my edited answer. visit the links.. – user370305 Nov 22 '11 at 17:46 — user370305, Nov 22 '11 at 17:46

score 1 · Answer 1 · edited May 23 '17 at 12:03

Try this, And let me know what happen..

songstoadd.clear();
 while( m <songtitle.size()-1){
                  if(songtitle.get(m).substring(0, 1).equals( songtitle.get(m+1).substring(0, 1))){
                      m++;
                  }else{

                songstoadd.add(songtitle.get(m));
                adapter.addSection(songtitle.get(m).substring(0, 1), new ArrayAdapter<String>(getApplicationContext(),R.layout.song, songstoadd));

              m++;
                  }

For more info look at

Android: how to use SectionIndexer

Using AlphabetIndexer for fastscrolling ListView

Create easy alphabetical scrolling in ListView?

It still adds every single song title to every section – Waggoner_Keith Nov 22 '11 at 16:48 — Waggoner_Keith, Nov 22 '11 at 16:48

score 0 · Answer 2 · answered Nov 22 '11 at 09:43

Try changing your while as below and try..

while(m <songtitle.size()-1){
     if(songtitle.get(m).substring(0, 1) == songtitle.get(m+1).substring(0, 1)){
         songstoadd.add(songtitle.get(m));
         m++;
     }else{

         songstoadd.add(songtitle.get(m));

         adapter.addSection(songtitle.get(m).substring(0, 1), new ArrayAdapter<String>(getApplicationContext(),R.layout.song, songstoadd));

         songstoadd.clear();

         m++;
    }
}

THis only adds the Section Header and not anything from the songtitle array — Waggoner_Keith, Nov 22 '11 at 16:49

Add String to adapter

2 Answers2