com.analysedesgeeks.android.MainActivity.java Source code

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Here is the source code for com.analysedesgeeks.android.MainActivity.java

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/*
 * Copyright (C) 2012 Thierry-Dimitri Roy <thierryd@gmail.com>
 *
 * 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
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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.
 */
package com.analysedesgeeks.android;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.ViewPager;
import android.view.KeyEvent;

import com.actionbarsherlock.app.ActionBar;
import com.actionbarsherlock.app.ActionBar.Tab;
import com.actionbarsherlock.view.MenuItem;

public class MainActivity extends AbstractPodcastActivity {

    private static final int TWITTER_FRAGMENT_INDEX = 1;

    private ViewPager mViewPager;

    private TabsAdapter mTabsAdapter;

    @Override
    public boolean onKeyDown(final int keyCode, final KeyEvent event) {
        //we need to check if we can go back in the twitter fragment. Otherwise, just pass the event down 

        final ActionBar actionBar = getSupportActionBar();
        if (actionBar.getSelectedNavigationIndex() == TWITTER_FRAGMENT_INDEX) {
            if (event.getAction() == KeyEvent.ACTION_DOWN) {
                switch (keyCode) {
                case KeyEvent.KEYCODE_BACK:
                    final WebFragment webFragment = (WebFragment) mTabsAdapter.getItem(TWITTER_FRAGMENT_INDEX);
                    if (webFragment.goBack()) {
                        return true;
                    }
                }

            }
        }
        return super.onKeyDown(keyCode, event);
    }

    @Override
    public boolean onOptionsItemSelected(final MenuItem item) {
        switch (item.getItemId()) {
        case android.R.id.home:
            // app icon in action bar clicked; go home - already at home
            return true;
        default:
            return super.onOptionsItemSelected(item);
        }
    }

    @Override
    public void onResume() {
        super.onResume();

        updatePodcastInfo();
    }

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

        setContentView(R.layout.activity_main);
        getSupportActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

        final ActionBar.Tab tab1 = getSupportActionBar().newTab().setText(R.string.podcast);
        final ActionBar.Tab tab2 = getSupportActionBar().newTab().setText(R.string.twitter);

        mViewPager = (ViewPager) findViewById(R.id.pager);
        mTabsAdapter = new TabsAdapter(this, getSupportActionBar(), mViewPager);

        mTabsAdapter.addTab(tab1, RssListFragment.class);
        mTabsAdapter.addTab(tab2, WebFragment.class);

        if (savedInstanceState != null) {
            getSupportActionBar().setSelectedNavigationItem(savedInstanceState.getInt("index"));
        }

    }

    @Override
    protected void onSaveInstanceState(final Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putInt("index", getSupportActionBar().getSelectedNavigationIndex());
    }

    public static class TabsAdapter extends FragmentPagerAdapter
            implements ViewPager.OnPageChangeListener, ActionBar.TabListener {
        private final ActionBar mActionBar;
        private final ViewPager mViewPager;
        private final Fragment rssFragment;
        private final Fragment twitterFragment;

        public TabsAdapter(final FragmentActivity activity, final ActionBar actionBar, final ViewPager pager) {
            super(activity.getSupportFragmentManager());
            mActionBar = actionBar;
            mViewPager = pager;
            mViewPager.setAdapter(this);
            mViewPager.setOnPageChangeListener(this);

            rssFragment = RssListFragment.newInstance();
            twitterFragment = WebFragment.newInstance(Const.ADG_TWITTER_URL);
        }

        public void addTab(final ActionBar.Tab tab, final Class<?> clss) {
            mActionBar.addTab(tab.setTabListener(this));
            notifyDataSetChanged();
        }

        @Override
        public int getCount() {
            return 2;
        }

        @Override
        public Fragment getItem(final int position) {
            if (position == 0) {
                return rssFragment;
            } else if (position == 1) {
                return twitterFragment;
            } else {
                return null;
            }
        }

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

        }

        @Override
        public void onPageScrollStateChanged(final int state) {

        }

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

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

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

        }

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

        }
    }
}