A Textview Change Applies To Multiple Textviews Using Listview And Arrayadapter

I've started working on a small project not to long ago, the main goal is to forge a way for me to keep track of my actions during the course of 100 weeks. I'm still a rookie andro

Solution 1:

Ok, your background is shuffling because when you scroll your ListView getView() is called and it consider your current position of TextView(as current view) and set background on it as it detect setBackground() method at onClick listener on it..

First I recommend to create a Adapter class extends ArrayAdapter<?>

Solution 1 :

Use setTag() at onClick listener on your text view like..

text.setTag(position);

and above it use getTag() and put condition

if(holder.text.getTag().equals(position)){
    holder.text.setBackgroundColor(Color.BLUE);
}else{
    holder.text.setBackgroundColor(Color.WHITE);
}

Solution 2 :

Added this to onCreate method

    ArrayList<String> _array = new ArrayList<String>();
    for(int i=0 ; i <1000; i ++){                       // 1000 value
        _array.add(i+"");                
    }
    list.setAdapter(new  MainAdapter(this, _array));        // pass you list here

ArrayAdapter class :

publicclassMainAdapterextendsArrayAdapter<String> {

    ArrayList<String> _st = newArrayList<String>();
    ArrayList<Integer> check = newArrayList<Integer>();
    Context _context;
    publicMainAdapter(Context context,ArrayList<String> _st) {
        super(context,R.layout.main, _st);        // your inflate layoutthis._context = context;
        this._st = _st;

    }
    @OverridepublicintgetCount() {
        return _st.size();
    }
    @OverridepubliclonggetItemId(int position) {
        return0;
    }
    @Overridepublic View getView(finalint position, View convertView, ViewGroup parent) {

        //---//// check if current position is there in arraylistif(checking(position)){
            holder.text.setBackgroundColor(Color.BLUE);
        }else{
            holder.text.setBackgroundColor(Color.WHITE);
        }
        holder.text.setOnClickListener(newOnClickListener() {
            @OverridepublicvoidonClick(View arg0) {
                // set background and put value in array list
                holder.text.setBackgroundColor(Color.BLUE);
                check.add(position);

            }
        });
        return convertView;
    }

    // this will check whether current position is there is array list or not and if it there it will break loop and return truepublicbooleanchecking(int position){
        booleanfine=false;
        for(int i=0; i<check.size();i++){
            if(position == check.get(i)){
                fine = true;
                break;
            }
        }
        return fine;
    }       
  }
  publicclassViewHolder{
      TextView text;
  }
}

I don't how much I am ethical in this code...but as you have specified that you have 100 value.I have tested it on 1000 value and it worked

I am not expert so let me know if I am wrong somewhere

Hope it works !!!