Java tutorial
package brazole.com.secondtask; import android.graphics.Color; import android.os.Bundle; import android.support.design.widget.TabLayout; import android.support.v4.view.ViewPager; import android.view.Gravity; import android.view.View; import android.support.design.widget.NavigationView; import android.support.v4.view.GravityCompat; import android.support.v4.widget.DrawerLayout; import android.support.v7.app.ActionBarDrawerToggle; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.view.Menu; import android.view.MenuItem; import brazole.com.secondtask.adapters.PagerAdapter; /* * 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. * * Main ACtivity */ public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener { private DrawerLayout mDrawerLayout; private Toolbar mToolbar; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mToolbar = (Toolbar) findViewById(R.id.toolbar); mToolbar.setTitle(R.string.drawer_all_issue); // change hamburger icon mToolbar.setNavigationIcon(R.drawable.ic_menu); setSupportActionBar(mToolbar); // Navigation Drawer setNAvigationDrawer(); // Tabs createSelectedTab(); } @Override public void onBackPressed() { DrawerLayout mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); if (mDrawerLayout.isDrawerOpen(GravityCompat.START)) { mDrawerLayout.closeDrawer(GravityCompat.START); } else { super.onBackPressed(); } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.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; } return super.onOptionsItemSelected(item); } @SuppressWarnings("StatementWithEmptyBody") @Override public boolean onNavigationItemSelected(MenuItem item) { // Handle navigation view item clicks here. int id = item.getItemId(); if (id == R.id.all_issue) { // Handle the camera action } else if (id == R.id.issue_on_the_map) { } DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); drawer.closeDrawer(GravityCompat.START); return true; } private void setNAvigationDrawer() { mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); ActionBarDrawerToggle mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, mToolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close); mDrawerLayout.addDrawerListener(mDrawerToggle); mDrawerToggle.syncState(); NavigationView mNavigationView = (NavigationView) findViewById(R.id.nav_view); mNavigationView.setNavigationItemSelectedListener(this); mDrawerToggle.setDrawerIndicatorEnabled(false); mToolbar.setNavigationOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { mDrawerLayout.openDrawer(Gravity.LEFT); } }); } public void createSelectedTab() { TabLayout mTabLayout = (TabLayout) findViewById(R.id.tab_layout); mTabLayout.addTab(mTabLayout.newTab().setText(R.string.tab1_label)); mTabLayout.addTab(mTabLayout.newTab().setText(R.string.tab2_label)); mTabLayout.addTab(mTabLayout.newTab().setText(R.string.tab3_label)); mTabLayout.setTabGravity(TabLayout.GRAVITY_FILL); mTabLayout.setSelectedTabIndicatorHeight((int) (3 * getResources().getDisplayMetrics().density)); mTabLayout.setSelectedTabIndicatorColor(Color.WHITE); final ViewPager mViewPager = (ViewPager) findViewById(R.id.pager); final PagerAdapter mAdapter = new PagerAdapter(getSupportFragmentManager(), mTabLayout.getTabCount()); mViewPager.setAdapter(mAdapter); mViewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(mTabLayout)); mTabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() { @Override public void onTabSelected(TabLayout.Tab tab) { mViewPager.setCurrentItem(tab.getPosition()); } @Override public void onTabUnselected(TabLayout.Tab tab) { } @Override public void onTabReselected(TabLayout.Tab tab) { } }); } }