com.example.android.materialdesigncodelab.presentation.activities.MainActivity.java Source code

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Here is the source code for com.example.android.materialdesigncodelab.presentation.activities.MainActivity.java

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/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * 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.example.android.materialdesigncodelab.presentation.activities;

import android.os.Bundle;
import android.support.design.widget.NavigationView;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.GravityCompat;
import android.support.v4.view.ViewPager;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;

import com.example.android.materialdesigncodelab.R;
import com.example.android.materialdesigncodelab.presentation.fragments.CardContentFragment;
import com.example.android.materialdesigncodelab.presentation.fragments.ListContentFragment;
import com.example.android.materialdesigncodelab.presentation.fragments.TileContentFragment;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private DrawerLayout drawerLayout;

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

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
        setupViewPager(viewPager);

        TabLayout tabs = (TabLayout) findViewById(R.id.tabs);
        tabs.setupWithViewPager(viewPager);

        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        drawerLayout = (DrawerLayout) findViewById(R.id.drawer);

        ActionBar supportActionBar = getSupportActionBar();
        if (supportActionBar != null) {
            supportActionBar.setHomeAsUpIndicator(R.drawable.ic_menu_white_24dp);
            supportActionBar.setDisplayHomeAsUpEnabled(true);
        }

        navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(MenuItem menuItem) {

                menuItem.setChecked(true);

                drawerLayout.closeDrawers();
                return true;
            }
        });
    }

    private void setupViewPager(ViewPager viewPager) {
        Adapter adapter = new Adapter(getSupportFragmentManager());
        adapter.addFragment(new ListContentFragment(), "List");
        adapter.addFragment(new TileContentFragment(), "Tile");
        adapter.addFragment(new CardContentFragment(), "Card");
        viewPager.setAdapter(adapter);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        } else if (id == android.R.id.home) {
            drawerLayout.openDrawer(GravityCompat.START);
        }
        return super.onOptionsItemSelected(item);
    }

    static class Adapter extends FragmentPagerAdapter {
        private final List<Fragment> fragmentList = new ArrayList<>();
        private final List<String> fragmentTitleList = new ArrayList<>();

        public Adapter(FragmentManager fragmentManager) {
            super(fragmentManager);
        }

        @Override
        public Fragment getItem(int position) {
            return this.fragmentList.get(position);
        }

        @Override
        public int getCount() {
            return this.fragmentList.size();
        }

        public void addFragment(Fragment fragment, String title) {
            fragmentList.add(fragment);
            fragmentTitleList.add(title);
        }

        @Override
        public CharSequence getPageTitle(int position) {
            return this.fragmentTitleList.get(position);
        }
    }
}