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);

        }