Java tutorial
/* * Project: NextGIS Mobile * Purpose: Mobile GIS for Android. * Author: Dmitry Baryshnikov (aka Bishop), bishop.dev@gmail.com * Author: NikitaFeodonit, nfeodonit@yandex.com * Author: Stanislav Petriakov, becomeglory@gmail.com * ***************************************************************************** * Copyright (c) 2012-2016 NextGIS, info@nextgis.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.nextgis.mobile.activity; import android.content.ActivityNotFoundException; import android.content.Context; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.support.annotation.Nullable; 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.PagerAdapter; import android.support.v4.view.ViewPager; import android.support.v7.app.AlertDialog; import android.text.Html; import android.text.method.LinkMovementMethod; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; import android.widget.Toast; import com.nextgis.maplibui.activity.NGActivity; import com.nextgis.maplibui.util.ControlHelper; import com.nextgis.mobile.BuildConfig; import com.nextgis.mobile.MainApplication; import com.nextgis.mobile.R; import com.nextgis.mobile.util.SettingsConstants; public class AboutActivity extends NGActivity implements ViewPager.OnPageChangeListener { private ViewPager mViewPager; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_about); setToolbar(R.id.main_toolbar); mViewPager = (ViewPager) findViewById(com.nextgis.maplibui.R.id.viewPager); PagerAdapter adapter = new TabsAdapter(getSupportFragmentManager()); mViewPager.setAdapter(adapter); mViewPager.addOnPageChangeListener(this); TabLayout tabLayout = (TabLayout) findViewById(com.nextgis.maplibui.R.id.tabs); tabLayout.setupWithViewPager(mViewPager); TextView txtCopyrightText = (TextView) findViewById(R.id.copyright); txtCopyrightText.setText(Html.fromHtml(getString(R.string.copyright))); txtCopyrightText.setMovementMethod(LinkMovementMethod.getInstance()); } @Override protected void onDestroy() { super.onDestroy(); mViewPager.removeOnPageChangeListener(this); } @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } @Override public void onPageSelected(int position) { ((MainApplication) getApplication()).sendScreen( position == 1 ? SettingsConstants.GA_SCREEN_ABOUT : SettingsConstants.GA_SCREEN_SUPPORT); } @Override public void onPageScrollStateChanged(int state) { } private class TabsAdapter extends FragmentPagerAdapter { TabsAdapter(FragmentManager fm) { super(fm); } @Override public Fragment getItem(int position) { switch (position) { case 0: return new ContactsFragment(); case 1: return new AboutFragment(); } return new Fragment(); } @Override public int getCount() { return 2; } @Override public CharSequence getPageTitle(int position) { switch (position) { case 0: return getString(R.string.action_support); case 1: return getString(R.string.action_about); } return getString(R.string.action_about); } } public static class AboutFragment extends Fragment { @Nullable @Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { Context context = getContext(); View v = View.inflate(context, R.layout.fragment_about, null); TextView txtVersion = (TextView) v.findViewById(R.id.app_version); txtVersion.setText("v. " + BuildConfig.VERSION_NAME + " (rev. " + BuildConfig.VERSION_CODE + ")"); v.findViewById(R.id.creditsInto).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { AlertDialog builder = new AlertDialog.Builder(v.getContext()).setTitle(R.string.credits_intro) .setMessage(R.string.credits).setPositiveButton(android.R.string.ok, null).show(); TextView message = (TextView) builder.findViewById(android.R.id.message); if (message != null) { message.setMovementMethod(LinkMovementMethod.getInstance()); message.setLinksClickable(true); } } }); TextView contacts = (TextView) v.findViewById(R.id.contacts); contacts.setMovementMethod(LinkMovementMethod.getInstance()); return v; } } public static class ContactsFragment extends Fragment { @Nullable @Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { final Context context = getContext(); final View v = View.inflate(context, R.layout.fragment_contacts, null); TextView telegram = (TextView) v.findViewById(R.id.telegram); ControlHelper.highlightText(telegram); telegram.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { try { Intent telegram = new Intent(Intent.ACTION_VIEW, Uri.parse("tg://resolve?domain=nextgis_support")); startActivity(telegram); } catch (ActivityNotFoundException e) { Toast.makeText(context, R.string.not_installed, Toast.LENGTH_SHORT).show(); } } }); return v; } } }