LeadFragment.java

package org.gdg.frisbee.android.chapter;

import android.app.Activity;
import android.content.Context;
import android.net.Uri;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.ListFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;

import org.gdg.frisbee.android.Const;
import org.gdg.frisbee.android.R;
import org.gdg.frisbee.android.api.model.LeadMessage;
import org.gdg.frisbee.android.utils.Utils;

import butterknife.BindView;
import butterknife.ButterKnife;

public class LeadFragment extends ListFragment {
    private LeadAnnouncementsAdapter mAdapter;

    @Override
    public View onCreateView(LayoutInflater inflater,
                             @Nullable ViewGroup container,
                             @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_for_leads, container, false);
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        mAdapter = new LeadAnnouncementsAdapter(getActivity());
        setListAdapter(mAdapter);
        mAdapter.add(LeadMessage.newMessage(getString(R.string.leads_welcome_title),
            getString(R.string.leads_welcome)));
        mAdapter.add(LeadMessage.newResource(getString(R.string.leads_resources_title),
            getString(R.string.leads_resources),
            Const.URL_GDG_RESOURCE_FOLDER));
        mAdapter.add(LeadMessage.newResource(getString(R.string.leads_wisdom_title),
            getString(R.string.leads_wisdom),
            Const.URL_GDG_WISDOM_BOOK));
        mAdapter.add(LeadMessage.newResource(getString(R.string.leads_gplus_community_title),
            getString(R.string.leads_gplus_community),
            Const.URL_GDG_LEADS_GPLUS_COMMUNITY));
    }

    @Override
    public void onListItemClick(final ListView l, final View v, final int position, final long id) {
        final LeadMessage item = mAdapter.getItem(position);
        if (item.getType() == LeadMessage.Type.resource) {
            Activity activity = getActivity();
            startActivity(Utils.createExternalIntent(activity, Uri.parse(item.getLinkUrl())));
        }
    }

    private static class LeadAnnouncementsAdapter extends ArrayAdapter<LeadMessage> {

        private LayoutInflater layoutInflater;

        public LeadAnnouncementsAdapter(final Context context) {
            super(context, R.layout.list_announcement_item);
            layoutInflater = LayoutInflater.from(context);
        }

        @Override
        public View getView(final int position, View convertView, final ViewGroup parent) {
            if (convertView == null) {
                convertView = layoutInflater.inflate(R.layout.list_announcement_item, parent, false);
                final ViewHolder viewHolder = new ViewHolder(convertView);
                convertView.setTag(viewHolder);
            }

            ViewHolder viewHolder = (ViewHolder) convertView.getTag();
            viewHolder.title.setText(getItem(position).getTitle());
            viewHolder.details.setText(getItem(position).getDetails());
            viewHolder.type.setText(getContext().getString(getItem(position).getType().getName()));
            return convertView;
        }
    }

    public static class ViewHolder {
        @BindView(R.id.msg_title)
        TextView title;
        @BindView(R.id.msg_details)
        TextView details;
        @BindView(R.id.msg_type)
        TextView type;

        public ViewHolder(View view) {
            ButterKnife.bind(this, view);
        }
    }
}