com.nadmm.airports.TabPagerActivityBase.java Source code

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Here is the source code for com.nadmm.airports.TabPagerActivityBase.java

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/*
 * FlightIntel for Pilots
 *
 * Copyright 2015-2016 Nadeem Hasan <nhasan@nadmm.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.nadmm.airports;

import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;

import com.nadmm.airports.utils.PagerAdapter;

import java.util.HashMap;

public class TabPagerActivityBase extends ActivityBase {

    private HashMap<String, Fragment> mWxFragments = new HashMap<>();
    private int mCurrentFragmentIndex = -1;
    private ViewPager mViewPager;
    private PagerAdapter mPagerAdapter;
    private TabLayout mTabLayout;

    private static final String SAVED_TAB = "saved_tab";

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

        setContentView(R.layout.activity_tab_pager);

        mViewPager = (ViewPager) findViewById(R.id.view_pager);
        mPagerAdapter = new PagerAdapter(this, getSupportFragmentManager(), mViewPager);

        mViewPager.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {

            public void onPageScrollStateChanged(int state) {
                // Disable the swipe refresh while moving between pages
                if (getCurrentFragment().isRefreshable()) {
                    enableDisableSwipeRefresh(state == ViewPager.SCROLL_STATE_IDLE);
                }
            }
        });

        mTabLayout = (TabLayout) findViewById(R.id.sliding_tabs);
    }

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

        mTabLayout.setupWithViewPager(mViewPager);

        mTabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {

            int mPosition = -1;

            @Override
            public void onTabSelected(TabLayout.Tab tab) {
                mPosition = tab.getPosition();
                mViewPager.setCurrentItem(mPosition);
                mCurrentFragmentIndex = mPosition;
                enableDisableSwipeRefresh(getCurrentFragment().isRefreshable());
                // Show the actionbar when a new page is selected
                resetActionBarAutoHide();
                autoShowOrHideActionBar(true);
            }

            @Override
            public void onTabUnselected(TabLayout.Tab tab) {
            }

            @Override
            public void onTabReselected(TabLayout.Tab tab) {
                if (mPosition != tab.getPosition()) {
                    onTabSelected(tab);
                }
            }
        });

        if (savedInstanceState != null) {
            mCurrentFragmentIndex = savedInstanceState.getInt(SAVED_TAB);
        } else {
            mCurrentFragmentIndex = getInitialTabIndex();
        }

        postRunnable(new Runnable() {
            @Override
            public void run() {
                mTabLayout.getTabAt(mCurrentFragmentIndex).select();
            }
        }, 0);
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);

        outState.putInt(SAVED_TAB, mViewPager.getCurrentItem());
    }

    @Override
    protected void requestDataRefresh() {
        FragmentBase fragment = getCurrentFragment();
        if (fragment.isRefreshable()) {
            fragment.requestDataRefresh();
        }
    }

    @Override
    public boolean canSwipeRefreshChildScrollUp() {
        FragmentBase fragment = getCurrentFragment();
        return fragment != null && fragment.canSwipeRefreshChildScrollUp();
    }

    public void addTab(String label, Class<?> clss, Bundle args) {
        mPagerAdapter.addTab(label, clss, args);
    }

    private FragmentBase getCurrentFragment() {
        return getFragmentAtPosition(mCurrentFragmentIndex);
    }

    protected FragmentBase getFragmentAtPosition(int position) {
        return (FragmentBase) mPagerAdapter.getItem(position);
    }

    protected int getInitialTabIndex() {
        return 0;
    }

}