ListViewActivity.java

/*
 * Copyright (c) 2014. Marshal Chen.
 */
package com.marshalchen.common.demoofui.fadingactionbar;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import com.marshalchen.common.demoofui.R;
import com.marshalchen.common.uimodule.fadingactionbar.FadingActionBarHelper;

public class ListViewActivity extends Activity {
    private ArrayAdapter<String> adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        FadingActionBarHelper helper = new FadingActionBarHelper()
            .actionBarBackground(R.drawable.fading_actionbar_ab_background)
            .headerLayout(R.layout.fading_actionbar_header)
            .contentLayout(R.layout.fading_actionbar_activity_listview);
        setContentView(helper.createView(this));
        helper.initActionBar(this);

        ListView listView = (ListView) findViewById(android.R.id.list);
        ArrayList<String> items = loadItems(R.raw.nyc_sites);
        adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, items);
        listView.setAdapter(adapter);
    }

    /**
     * @return A list of Strings read from the specified resource
     */
    private ArrayList<String> loadItems(int rawResourceId) {
        try {
            ArrayList<String> countries = new ArrayList<String>();
            InputStream inputStream = getResources().openRawResource(rawResourceId);
            BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
            String line;
            while ((line = reader.readLine()) != null) {
                countries.add(line);
            }
            reader.close();
            return countries;
        } catch (IOException e) {
            return null;
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.fading_actionbar_listview_activity_menu, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId() == R.id.action_change_dataset) {
            changeDataset();
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    private void changeDataset() {
      adapter.notifyDataSetChanged();
  }
}