Android Open Source - ShowCast Separated List Adapter

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Back to project page ShowCast.

License

The source code is released under:

GNU General Public License

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Java Source Code

package prezcast.sgu.fr.showcast.view;
// ww w.j  a  va  2s .c  o  m
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Adapter;
import android.widget.BaseAdapter;

import java.util.LinkedHashMap;
import java.util.Map;

import prezcast.sgu.fr.showcast.R;

/**
 * Adapter for list with zone
 */
public class SeparatedListAdapter extends BaseAdapter {

    public final Map<String, Adapter> zones = new LinkedHashMap<>();
    public final android.widget.ArrayAdapter<String> headers;
    public final static int TYPE_ZONE_HEADER = 0;

    /**
     * COnstructor
     *
     * @param context Application context
     */
    public SeparatedListAdapter(Context context) {
        headers = new android.widget.ArrayAdapter<>(context, R.layout.list_zone_header);
    }

    /**
     * Add zone
     *
     * @param zone New Zone to add in the list
     * @param adapter Adapter for the zone
     */
    public void addZone(String zone, Adapter adapter) {
        this.headers.add(zone);
        this.zones.put(zone, adapter);
    }

    public Object getItem(int position) {
        for (Object section : this.zones.keySet()) {
            Adapter adapter = zones.get(section);
            int size = adapter.getCount() + 1;

            // check if position inside this section
            if (position == 0) return section;
            if (position < size) return adapter.getItem(position - 1);

            // otherwise jump into next section
            position -= size;
        }
        return null;
    }

    public int getCount() {
        // total together all sections, plus one for each section header
        int total = 0;
        for (Adapter adapter : this.zones.values())
            total += adapter.getCount() + 1;
        return total;
    }

    public int getViewTypeCount() {
        // assume that headers count as one, then total all sections
        int total = 1;
        for (Adapter adapter : this.zones.values())
            total += adapter.getViewTypeCount();
        return total;
    }

    public int getItemViewType(int position) {
        int type = 1;
        for (Object section : this.zones.keySet()) {
            Adapter adapter = zones.get(section);
            int size = adapter.getCount() + 1;

            // check if position inside this section
            if (position == 0) return TYPE_ZONE_HEADER;
            if (position < size) return type + adapter.getItemViewType(position - 1);

            // otherwise jump into next section
            position -= size;
            type += adapter.getViewTypeCount();
        }
        return -1;
    }

    public boolean isEnabled(int position) {
        return (getItemViewType(position) != TYPE_ZONE_HEADER);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        int sectionnum = 0;
        for (Object section : this.zones.keySet()) {
            Adapter adapter = zones.get(section);
            int size = adapter.getCount() + 1;

            // check if position inside this section
            if (position == 0) return headers.getView(sectionnum, convertView, parent);
            if (position < size) return adapter.getView(position - 1, convertView, parent);

            // otherwise jump into next section
            position -= size;
            sectionnum++;
        }
        return null;
    }

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

}

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