Change text color of selected item of Listview in Android

Question

I am creating an application in which I have one Listview . When I select item of this Listview , one Alert dialog appears.
In this Alert dialog, there is also one Listview . Items in this Listview are depends on the user inputs.
Now, when I select item in this listview, text color must be changed and when I again select this item, text color must change to its original color.
What should be done?

Answer 1

Add a map to your class that tracks your selected items:

HashMap <Integer, Boolean> selectionStates = new HashMap <String, Boolean>();

Use a custom adapter for your ListView. In getView, set the color according to the value in your map:

if (selectionStates.contains(position) && selectionStates.get(position){
  yourTextView.setTextColor(selectedColor);
}
else {
  yourTextView.setTextColor(normalColor);
}

Add an onItemClickListener to your ListView eg in onCreate:

yourListView.setOnItemClickListener(){
  public void onItemClick (AdapterView<?> parent, View view, int position, long id){
    boolean alreadySelected = false;
    if (selectionStates.contains(position) && selectionStates.get(position) alreadySelected = true;
    selectionStates.put(position, !alreadySelected);

    TextView yourTextView = (TextView) view.findViewById(R.id.yourItemTextView);

    if (selectionStates.contains(position) && selectionStates.get(position){
      yourTextView.setTextColor(selectedColor);
    }
    else {
      yourTextView.setTextColor(normalColor);
    }
  }
};

This will not only change the color of an item immediately after it has been selected, but also retain the color after scrolling.

As an adapter, you could extend ArrayAdapter:

yourListView.setAdapter(new ArrayAdapter<WhatEverClass>(ArgumentsHere){
  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
      View view = super.getView(position, convertView, parent);
      TextView yourTextView = (TextView) view.findViewById(R.id.yourItemTextView);

      if (selectionStates.contains(position) && selectionStates.get(position){
         yourTextView.setTextColor(selectedColor);
      }
      else {
         yourTextView.setTextColor(normalColor);
      }
  }
});

Please note that I did not test this code, but it should at least give you an idea of what your code should look like.