GaspDataActivity.java

package com.appdynamics.demo.gasp.activity;

import android.app.ActionBar;
import android.app.FragmentTransaction;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.NavUtils;
import android.support.v4.view.ViewPager;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;

import com.appdynamics.demo.gasp.R;
import com.appdynamics.demo.gasp.adapter.RestaurantDataAdapter;
import com.appdynamics.demo.gasp.adapter.TabPagerAdapter;

/**
 * Copyright (c) 2013 Mark Prichard
 * <p/>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

public class GaspDataActivity extends FragmentActivity
                              implements ActionBar.TabListener, ViewPager.OnPageChangeListener {
    private static final String TAG = GaspDataActivity.class.getName();

    private ViewPager viewPager;
    private ActionBar actionBar;

    // Tab titles
    private final String[] tabs = { "Restaurants", "Reviews", "Users" };

    private RestaurantDataAdapter restaurantAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.gasp_data_layout);

        viewPager = (ViewPager) findViewById(R.id.pager);
        actionBar = getActionBar();
        TabPagerAdapter mAdapter = new TabPagerAdapter(getSupportFragmentManager());

        viewPager.setAdapter(mAdapter);
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

        viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
            }

            @Override
            public void onPageSelected(int position) {
                actionBar.setSelectedNavigationItem(position);
            }

            @Override
            public void onPageScrollStateChanged(int state) {

            }
        });

        // Adding Tabs
        for (String tab_name : tabs) {
            actionBar.addTab(actionBar.newTab()
                                      .setText(tab_name)
                                      .setTabListener(this));
        }
    }

    @Override
    public void onPageScrollStateChanged(int state) {
    }

    @Override
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
    }

    @Override
    public void onPageSelected(int position) {
        actionBar.setSelectedNavigationItem(position);
    }

    @Override
    public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) {
        viewPager.setCurrentItem(tab.getPosition());
    }

    @Override
    public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction ft) {
    }

    @Override
    public void onTabReselected(ActionBar.Tab tab, FragmentTransaction ft) {
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.options_menu_short, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        switch (item.getItemId()) {
            // Respond to the action bar's Up/Home button
            case android.R.id.home:
                NavUtils.navigateUpFromSameTask(this);
                return true;

            case R.id.gasp_settings:
                Intent intent = new Intent();
                intent.setClass(this, SetPreferencesActivity.class);
                startActivityForResult(intent, 0);
                return true;

            default:
                return super.onOptionsItemSelected(item);
        }
    }
}