Java tutorial
/* * 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.etg.bhavanas.collapsetablayout; import android.os.Build; import android.os.Bundle; import android.support.design.widget.FloatingActionButton; import android.support.design.widget.NavigationView; import android.support.design.widget.Snackbar; 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.app.AppCompatDelegate; import android.support.v7.widget.Toolbar; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.LinearLayout; import java.util.ArrayList; import java.util.List; /** * TODO */ public class MainActivity extends AppCompatActivity { private DrawerLayout mDrawerLayout; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); final ActionBar ab = getSupportActionBar(); ab.setHomeAsUpIndicator(R.drawable.ic_menu); ab.setDisplayHomeAsUpEnabled(true); mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view); if (navigationView != null) { setupDrawerContent(navigationView); } ViewPager viewPager = (ViewPager) findViewById(R.id.viewpager); if (viewPager != null) { setupViewPager(viewPager); } FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab); fab.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Snackbar.make(view, "Here's a Snackbar", Snackbar.LENGTH_LONG).setAction("Action", null).show(); } }); TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs); tabLayout.setupWithViewPager(viewPager); LinearLayout ll_edit = (LinearLayout) findViewById(R.id.ll_edit); ll_edit.setNextFocusUpId(R.id.tabs); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.sample_actions, menu); return true; } @Override public boolean onPrepareOptionsMenu(Menu menu) { switch (AppCompatDelegate.getDefaultNightMode()) { case AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM: menu.findItem(R.id.menu_night_mode_system).setChecked(true); break; case AppCompatDelegate.MODE_NIGHT_AUTO: menu.findItem(R.id.menu_night_mode_auto).setChecked(true); break; case AppCompatDelegate.MODE_NIGHT_YES: menu.findItem(R.id.menu_night_mode_night).setChecked(true); break; case AppCompatDelegate.MODE_NIGHT_NO: menu.findItem(R.id.menu_night_mode_day).setChecked(true); break; } return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case android.R.id.home: mDrawerLayout.openDrawer(GravityCompat.START); return true; case R.id.menu_night_mode_system: setNightMode(AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM); break; case R.id.menu_night_mode_day: setNightMode(AppCompatDelegate.MODE_NIGHT_NO); break; case R.id.menu_night_mode_night: setNightMode(AppCompatDelegate.MODE_NIGHT_YES); break; case R.id.menu_night_mode_auto: setNightMode(AppCompatDelegate.MODE_NIGHT_AUTO); break; } return super.onOptionsItemSelected(item); } private void setNightMode(@AppCompatDelegate.NightMode int nightMode) { AppCompatDelegate.setDefaultNightMode(nightMode); if (Build.VERSION.SDK_INT >= 11) { recreate(); } } private void setupViewPager(ViewPager viewPager) { Adapter adapter = new Adapter(getSupportFragmentManager()); adapter.addFragment(new CheeseListFragment(), "Category 1"); adapter.addFragment(new CheeseListFragment(), "Category 2"); adapter.addFragment(new CheeseListFragment(), "Category 3"); viewPager.setAdapter(adapter); } private void setupDrawerContent(NavigationView navigationView) { navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() { @Override public boolean onNavigationItemSelected(MenuItem menuItem) { menuItem.setChecked(true); mDrawerLayout.closeDrawers(); return true; } }); } static class Adapter extends FragmentPagerAdapter { private final List<Fragment> mFragments = new ArrayList<>(); private final List<String> mFragmentTitles = new ArrayList<>(); public Adapter(FragmentManager fm) { super(fm); } public void addFragment(Fragment fragment, String title) { mFragments.add(fragment); mFragmentTitles.add(title); } @Override public Fragment getItem(int position) { return mFragments.get(position); } @Override public int getCount() { return mFragments.size(); } @Override public CharSequence getPageTitle(int position) { return mFragmentTitles.get(position); } } }