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.grandilo.stanthony; import android.content.ContentUris; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.provider.CalendarContract; 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.widget.Toolbar; import android.view.Menu; import android.view.MenuItem; import android.view.View; import com.google.firebase.analytics.FirebaseAnalytics; import com.grandilo.stanthony.db.DBAdapter; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.ArrayList; import java.util.List; /** * TODO */ public class MainActivity extends AppCompatActivity { private DrawerLayout mDrawerLayout; DBAdapter db; private FirebaseAnalytics mFirebaseAnalytics; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mFirebaseAnalytics = FirebaseAnalytics.getInstance(this); String destDir = "/data/data/" + getPackageName() + "/databases/"; String destPath = destDir + "prayers"; File f = new File(destPath); if (!f.exists()) { //---make sure directory exists--- File directory = new File(destDir); directory.mkdirs(); //---copy the db from the assets folder into // the databases folder--- try { CopyDB(getBaseContext().getAssets().open("prayers"), new FileOutputStream(destPath)); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } db = new DBAdapter(this); 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); } TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs); tabLayout.setupWithViewPager(viewPager); } public void CopyDB(InputStream inputStream, OutputStream outputStream) throws IOException { //---copy 1K bytes at a time--- byte[] buffer = new byte[1024]; int length; while ((length = inputStream.read(buffer)) > 0) { outputStream.write(buffer, 0, length); } inputStream.close(); outputStream.close(); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.sample_actions, menu); 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.action_settings: startActivity(new Intent(this, AboutStAnthony.class)); return true; } return super.onOptionsItemSelected(item); } private void setupViewPager(ViewPager viewPager) { Adapter adapter = new Adapter(getSupportFragmentManager()); adapter.addFragment(new DevotionFragment(), "Devotion"); adapter.addFragment(new SpecialPrayersListFragment(), "Special Prayers"); viewPager.setAdapter(adapter); } private void setupDrawerContent(NavigationView navigationView) { navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() { @Override public boolean onNavigationItemSelected(MenuItem menuItem) { menuItem.setChecked(true); mDrawerLayout.closeDrawers(); switch (menuItem.getItemId()) { case android.R.id.home: mDrawerLayout.openDrawer(GravityCompat.START); return true; case R.id.nav_reminder: // A date-time specified in milliseconds since the epoch. long startMillis = 0; Uri.Builder builder = CalendarContract.CONTENT_URI.buildUpon(); builder.appendPath("time"); ContentUris.appendId(builder, startMillis); Intent intent = new Intent(Intent.ACTION_VIEW).setData(builder.build()); startActivity(intent); return true; case R.id.nav_feedback: startActivity(new Intent(MainActivity.this, FeedBack.class)); return true; case R.id.nav_about: startActivity(new Intent(MainActivity.this, About.class)); return true; } 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); } } }