Android Open Source - NYU-BusTracker-Android Stop Adapter

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Back to project page NYU-BusTracker-Android.

License

The source code is released under:

Apache License

Java Source Code

package com.nyubustracker.adapters;
/*  w  w  w  .  j  a va  2s  .c  o  m*/
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.TextView;

import com.nyubustracker.R;
import com.nyubustracker.models.Stop;

import java.util.ArrayList;
import java.util.List;

public class StopAdapter extends BaseAdapter {

    private final LayoutInflater mInflater;
    private final View.OnClickListener textOnClickListener;
    private final CompoundButton.OnCheckedChangeListener checkBoxOnCLickListener;
    private List<Stop> stops = new ArrayList<Stop>();

    // Constructor. Just used to initialize variables.
    public StopAdapter(Context context, List<Stop> mStops, View.OnClickListener listener, CompoundButton.OnCheckedChangeListener cbListener) {
        textOnClickListener = listener;
        checkBoxOnCLickListener = cbListener;
        // Cache the LayoutInflate to avoid asking for a new one each time.
        mInflater = LayoutInflater.from(context);
        stops = mStops;
    }

    // Number of elements feeding into this adapter.
    public int getCount() {
        return stops.size();
    }

    // Return the object at the given position.
    public Object getItem(int position) {
        return position;
    }

    public long getItemId(int position) {
        return position;
    }

    // getView gets the view for the given position (just a single element of our List View).
    // In this case, our view is just a compound button and a text view. This method populates
    // the CompoundButton and TextView with the proper values (by using the given position) from
    // our list of stops.
    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.stop_list_item, parent, false);
            if (convertView != null) {
                holder = new ViewHolder();
                // Get the specific views and store them in a ViewHolder.
                holder.text = (TextView) convertView.findViewById(R.id.stop_text);
                holder.checkbox = (CheckBox) convertView.findViewById(R.id.stop_checkbox);

                // Set their onClickListeners to the ones provided in the constructor.
                holder.checkbox.setOnCheckedChangeListener(checkBoxOnCLickListener);
                holder.text.setOnClickListener(textOnClickListener);
                convertView.setTag(holder);
            }
            else return new View(null);   // Should never reach here.
        }
        else {
            holder = (ViewHolder) convertView.getTag();
        }

        // Set their tags as the stop they represent. Used to pull out the stop on the other side (MainActivity).
        holder.text.setTag(stops.get(position));
        holder.checkbox.setTag(stops.get(position));

        // Update the display values of the views to reflect the object they represent.
        holder.text.setText(stops.get(position).getName());
        holder.checkbox.setChecked(stops.get(position).getFavorite());

        return convertView;
    }

    class ViewHolder {
        CheckBox checkbox;
        TextView text;
    }
}

Java Source Code List

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