android - Gmail style listview

Question

I want to create a listview that is similar in functionality to the Gmail android app. By that I mean that you can select rows by clicking an image on the left or view an email by clicking anywhere else on the row. I can come close, but it's not quite there.

My custom row consists of an ImageView on the left and some TextViews on the right. Here's the gist of the getView on my Adapter.

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        View row = super.getView(position, convertView, parent);

        imageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                getListView().setItemChecked(position, !getListView().isItemChecked(position));
            }
        });

        row.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(getActivity(), "" + position, Toast.LENGTH_SHORT).show();
            }
        });
     }

This comes very close! What's missing is the highlighting of the row on the row click listener.

Answer 1

Option 1: Use listView's inbuilt choiceMode feature. Unfortunately, I've never implemented. So, can't give you a detailed answer. But you can take a hint from here and other answers.

Option 2: Implement it on your own. Define an array/list or any work-around that keeps indexes of selected element of your list. And then use it to filter backgrounds in getView(). Here is a working example:

public class TestAdapter extends BaseAdapter {

List<String> data;
boolean is_element_selected[];

public TestAdapter(List<String> data) {
    this.data = data;
    is_element_selected = new boolean[data.size()];
}

public void toggleSelection(int index) {
    is_element_selected[index] = !is_element_selected[index];
    notifyDataSetChanged();
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    //Initialize your view and stuff

    if (is_element_selected[position])
        convertView.setBackgroundColor(context.getResources().getColor(R.color.blue_item_selector));
    else
        convertView.setBackgroundColor(Color.TRANSPARENT);

     imageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                toggleSelection(position);
            }
        });

      row.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //get to detailed view page
            }
        });

    return convertView;
}

Good luck!