Multiple selected items are not staying highlighted

Question

When i choose an item from listview, it turns gray but when I select another item in the listview then the previous highlighted item turns to default color and the new item turns to gray. What I want is to stay both of them to be highlighted, and when a click on the highlighted items they should turn back to normal as well.

My code:

listView = (ListView) findViewById(R.id.conversationList);
listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
listView.setMultiChoiceModeListener(new conversationsMultipleChoiceListener());
listView.setAdapter(conversationsAdapter);
((ConversationsAdapter) conversationsAdapter).updateConversations(conversationsList);
listView.setLongClickable(true);
listView.setOnItemClickListener(new OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view,
                            int position, long id) {
        Conversation item = (Conversation) conversationsAdapter.getItem(position);
        startChat(item, false);
    }
});


private class conversationsMultipleChoiceListener implements ListView.MultiChoiceModeListener {
    @Override
    public void onItemCheckedStateChanged(android.view.ActionMode mode, int position, long id, boolean checked) {
        final int checkedCount = listView.getCheckedItemCount();




        switch (checkedCount) {
            case 0:
                mode.setSubtitle(null);
                break;
            default:
                mode.setSubtitle("" + checkedCount + " konuşma seçildi");
                break;
        }
    }

    @Override
    public boolean onCreateActionMode(android.view.ActionMode mode, Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.conversation_actions, menu);
        mode.setTitle("Konuşmalarınız");
        return true;
    }

    @Override
    public boolean onPrepareActionMode(android.view.ActionMode mode, Menu menu) {
        return false;
    }

    @Override
    public boolean onActionItemClicked(android.view.ActionMode mode, MenuItem item) {

        switch (item.getItemId()) {
            case R.id.sil:
                Log.w("action","sil");
                mode.finish();
                break;
            case R.id.blokla:
                Log.w("action","blokla");
                mode.finish();
                break;
            default:
                break;
        }

        return true;
    }

    @Override
    public void onDestroyActionMode(android.view.ActionMode mode) {

    }
}

Adapter:

static class ViewHolder {
    TextView nameView;
    TextView bioView;
    CircleImageView imageView;
    TextView badge;
    ProgressBar idleTimeBar;
    public ImageView eyeView;
    ImageView instagramVerified;
    RelativeLayout badgeBg;
    ImageView solOk;
    TextView tarihText;
    ImageView fotoIcon;
    ImageView sesIcon;
}


public static class ConversationsAdapter extends BaseAdapter {
    List<Conversation> conversations;
    LayoutInflater inflater;
    Context context;

    private ConversationsAdapter(Context context, List<Conversation> conversations) {
        this.conversations = conversations;
        this.inflater = LayoutInflater.from(context);
        this.context = context;
    }

    public void updateConversations(List<Conversation> conversations) {
        this.conversations = conversations;
        notifyDataSetChanged();
    }

    @Override
    public int getCount() {
        return conversations.size();
    }

    @Override
    public Conversation getItem(int position) {
        return conversations.get(position);
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView == null) {
            convertView = inflater.inflate(R.layout.conversation_bars_v2, parent, false);
            holder = new ViewHolder();
            holder.nameView = (TextView) convertView.findViewById(R.id.nameText);
            holder.badge = (TextView) convertView.findViewById(R.id.unreadMessageCount);
            holder.bioView = (TextView) convertView.findViewById(R.id.bioText);
            holder.imageView = (CircleImageView) convertView.findViewById(R.id.image);
            holder.badgeBg = (RelativeLayout) convertView.findViewById(R.id.unreadMessageBg);
            holder.solOk = (ImageView) convertView.findViewById(R.id.imageView22);
            holder.tarihText = (TextView) convertView.findViewById(R.id.textView16);
            holder.sesIcon = (ImageView) convertView.findViewById(R.id.imageView22);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        Conversation item = conversations.get(position);
        String name = item.getName();
        String image_url = "http://application.domain.com/photos/profile/main/" + item.getPicture();

        if (item.getLastMessage().equals("Fotoğraf")) {
            holder.sesIcon.setImageResource(R.drawable.send_photo);
            holder.sesIcon.setVisibility(View.VISIBLE);
        }else if (item.getLastMessage().equals("Ses")) {
            holder.sesIcon.setImageResource(R.drawable.send_voice_record);
            holder.sesIcon.setVisibility(View.VISIBLE);
        }else{
            holder.sesIcon.setVisibility(View.INVISIBLE);
        }

        Long messageTimestamp = item.getLastMessageTime();

        long nowTimestamp = timeHolder.toMillis(false);


        Calendar messageTimeCal = Calendar.getInstance();
        Calendar currentTimeCal = Calendar.getInstance();
        messageTimeCal.setTimeInMillis(messageTimestamp);
        currentTimeCal.setTimeInMillis(nowTimestamp);

        boolean sameDay = messageTimeCal.get(Calendar.DAY_OF_YEAR) == currentTimeCal.get(Calendar.DAY_OF_YEAR) &&
                messageTimeCal.get(Calendar.YEAR) == currentTimeCal.get(Calendar.YEAR);

        boolean lastDay = messageTimeCal.get(Calendar.DAY_OF_YEAR) == currentTimeCal.get(Calendar.DAY_OF_YEAR) -1 &&
                messageTimeCal.get(Calendar.YEAR) == currentTimeCal.get(Calendar.YEAR);


        String dateText = "";
        if (sameDay) {
            //Mesaj bugün mü gönderildi?
            SimpleDateFormat dateFormat1 = new SimpleDateFormat("HH:mm");
            dateText = dateFormat1.format(messageTimeCal.getTime());
        }else{
            if (lastDay) {
                //Bugün değilse mesaj dün mü gönderilmiş?
                dateText = "Dün";
            }else{
                //Dün de değilse kaç gün önce gönderilmiş?
                long diff = Math.abs(nowTimestamp - messageTimestamp);
                int bolum =  (int) (diff / (24 * 60  * 60 * 1000));
                if (bolum <= 3) {
                    //Eğer geçen gün sayısı 3 veya daha az ise gün adını ekrana yaz
                    dateText = String.format("%tA", messageTimeCal);
                }else{
                    //Yoksa direk tarihi yaz
                    SimpleDateFormat dateFormat = new SimpleDateFormat("dd.MM.yyyy");
                    dateText = dateFormat.format(messageTimeCal.getTime());
                }
            }
        }




        holder.tarihText.setText(dateText);


        holder.nameView.setText(name);
        if (item.getLastMessageFromMe() == 0) {
            holder.bioView.setTextColor(Color.parseColor("#7A7A7A"));
            //holder.solOk.setColorFilter(Color.parseColor("#666666"), android.graphics.PorterDuff.Mode.MULTIPLY); -- mehmet değiştirdi
            holder.bioView.setTypeface(Typeface.SANS_SERIF, Typeface.NORMAL);
        } else {
            holder.bioView.setTextColor(Color.parseColor("#7A7A7A"));
            //holder.solOk.setColorFilter(Color.parseColor("#A8A8B7"), android.graphics.PorterDuff.Mode.MULTIPLY); -- mehmet değiştirdi
            holder.bioView.setTypeface(Typeface.SANS_SERIF, Typeface.NORMAL);
        }
        holder.bioView.setText(item.getLastMessage());
        if (item.getLastMessage().equals("")) {
            holder.bioView.setVisibility(View.GONE);
        } else {
            holder.bioView.setVisibility(View.VISIBLE);
        }

        if (item.getPicture().equals("default.jpg")) {
            Picasso.with(context).load(R.drawable.default_picture).into(holder.imageView);
        }else if (item.getPicture().equals("default_1.jpg")) {
            Picasso.with(context).load(R.drawable.default_color_1).into(holder.imageView);
        }else if (item.getPicture().equals("default_2.jpg")) {
            Picasso.with(context).load(R.drawable.default_color_2).into(holder.imageView);
        }else if (item.getPicture().equals("default_3.jpg")) {
            Picasso.with(context).load(R.drawable.default_color_3).into(holder.imageView);
        }else if (item.getPicture().equals("default_4.jpg")) {
            Picasso.with(context).load(R.drawable.default_color_4).into(holder.imageView);
        }else if (item.getPicture().equals("default_5.jpg")) {
            Picasso.with(context).load(R.drawable.default_color_5).into(holder.imageView);
        }else{
            Picasso.with(context).load(image_url).into(holder.imageView);
        }

        holder.badge.setText(String.valueOf(item.getUnread()));
        if (item.getUnread() != 0) {
            holder.badgeBg.setVisibility(View.VISIBLE);
        } else {
            holder.badgeBg.setVisibility(View.GONE);
        }
        return convertView;
    }
}

Listview xml:

<ListView
    android:id="@+id/conversationList"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginLeft="10dp"
    android:layout_marginTop="0dp"
    android:layout_marginRight="10dp"
    android:divider="@android:color/transparent"
    android:dividerHeight="7.0sp"
    android:scrollbars="none"
    android:listSelector="@drawable/conversations_selector"></ListView>

How can i achive that functionality?

Answer 1

First, add a field conversationSelected in the Conversation class.
You should useRecyclerView instead of ListView.
You can refer to the official documentation to get started with RecyclerView.
When you have your RecyclerView, you can define the Adapter in this way:

public class ConversationAdapter extends RecyclerView.Adapter<ConversationAdapter.ViewHolder> {
List<Conversation> conversations;

public ConversationAdapter(List<Conversation> conversations) {
    this.conversations = conversations; 
}

public ConversationAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent,
                                               int viewType) {
    // create a new view
    TextView v = (TextView) LayoutInflater.from(parent.getContext())
            .inflate(R.layout.item_view, parent, false);
    ...
    MyViewHolder vh = new MyViewHolder(v);
    return vh;
}
// Replace the contents of a view (invoked by the layout manager)
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
Conversation conversation = conversations.get(position);
holder.mTextView.setText(conversation.getConversationText());   

}

// Return the size of your dataset (invoked by the layout manager)
@Override
public int getItemCount() {
    return conversations.size();
}

public static class MyViewHolder extends RecyclerView.ViewHolder {
    // each data item is just a string in this case
    public TextView mTextView;

    public MyViewHolder(TextView v) {
        super(v);
        mTextView = v;
    }
}

Next step: add item click listener to the RecyclerView: I struggled a little bit before see this answer which helps me to solve the problem: RecyclerView click Listener
In the clickListener you have to change the state conversationSelected of the Conversation in the conversations list (not inside the ViewHolder) to true.
Then when you need to retrieve the selected conversation you have only to check this value.