Java tutorial
/* * Copyright 2016 Analog IO * * 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 dk.cafeanalog; import android.content.Intent; import android.content.res.Configuration; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; import android.support.v4.widget.DrawerLayout; import android.support.v7.app.ActionBarDrawerToggle; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.view.Menu; import android.view.MenuItem; import android.view.View; import java.util.List; import dk.cafeanalog.networking.AnalogClient; import rx.functions.Action1; public class MainActivity extends AppCompatActivity implements CafeAnalogAdapter.OnItemClickListener { private static final String IS_OPEN_FRAGMENT = "dk.cafeanalog.MainActivity.IS_OPEN_FRAGMENT", OPENING_FRAGMENT = "dk.cafeanalog.MainActivity.OPENING_FRAGMENT"; private DrawerLayout mDrawerLayout; private ActionBarDrawerToggle mDrawerToggle; private CharSequence mDrawerTitle; private CharSequence mTitle; private boolean mVisible; @Override protected void onCreate(Bundle savedInstanceState) { mVisible = true; super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); if (getSupportActionBar() == null) { throw new RuntimeException("Remember to use a theme with a toolbar!"); } String[] menuItems = getResources().getStringArray(R.array.analog_menu_items); mTitle = mDrawerTitle = getTitle(); mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); RecyclerView mDrawerList = (RecyclerView) findViewById(R.id.left_drawer); if (mDrawerList == null) { throw new RuntimeException("Stop complaining Android Studio!"); } mDrawerList.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false)); // improve performance by indicating the list is fixed size. mDrawerList.setHasFixedSize(true); // set up the drawer's list view with items and click listener mDrawerList.setAdapter(new CafeAnalogAdapter(menuItems, this)); // enable ActionBar app icon to behave as action to toggle nav drawer getSupportActionBar().setDisplayHomeAsUpEnabled(true); getSupportActionBar().setHomeButtonEnabled(true); // ActionBarDrawerToggle ties together the the proper interactions // between the sliding drawer and the action bar app icon mDrawerToggle = new ActionBarDrawerToggle(this, /* host Activity */ mDrawerLayout, /* DrawerLayout object */ R.string.drawer_open, /* "open drawer" description for accessibility */ R.string.drawer_close /* "close drawer" description for accessibility */ ) { public void onDrawerClosed(View view) { getSupportActionBar().setTitle(mTitle); invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() } public void onDrawerOpened(View drawerView) { getSupportActionBar().setTitle(mDrawerTitle); invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() } }; mDrawerLayout.addDrawerListener(mDrawerToggle); if (savedInstanceState == null) { // Only if the application is fresh. Otherwise, keep last state of fragment manager. getSupportFragmentManager().beginTransaction() .replace(R.id.main_layout, new IsOpenFragment(), IS_OPEN_FRAGMENT).commit(); } } @Override protected void onResume() { super.onResume(); mVisible = true; } @Override protected void onPause() { mVisible = false; super.onPause(); } private void getOpenings(final Action1<List<DayOfOpenings>> resultFunction) { AnalogClient.getInstance().getDaysOfOpenings(resultFunction, new Action1<Throwable>() { @Override public void call(Throwable throwable) { // Ignore } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.navigation_drawer, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // The action bar home/up action should open or close the drawer. // ActionBarDrawerToggle will take care of this. if (mDrawerToggle.onOptionsItemSelected(item)) { return true; } // Handle action buttons return super.onOptionsItemSelected(item); } @Override public void setTitle(CharSequence title) { mTitle = title; if (getSupportActionBar() != null) getSupportActionBar().setTitle(mTitle); } /** * When using the ActionBarDrawerToggle, you must call it during * onPostCreate() and onConfigurationChanged()... */ @Override protected void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); // Sync the toggle state after onRestoreInstanceState has occurred. mDrawerToggle.syncState(); } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); // Pass any configuration change to the drawer toggles mDrawerToggle.onConfigurationChanged(newConfig); } @Override public void onClick(int position) { switch (position) { case 0: // Front page if (getSupportFragmentManager().getBackStackEntryCount() == 1) { getSupportFragmentManager().popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE); getSupportFragmentManager().beginTransaction() .replace(R.id.main_layout, new IsOpenFragment(), IS_OPEN_FRAGMENT).commit(); } mDrawerLayout.closeDrawers(); break; case 1: // Opening Hours if (getSupportFragmentManager().getBackStackEntryCount() == 0) { getOpenings(new Action1<List<DayOfOpenings>>() { @Override public void call(List<DayOfOpenings> openings) { if (mVisible) { getSupportFragmentManager().beginTransaction() .replace(R.id.main_layout, OpeningsFragment.newInstance(openings), OPENING_FRAGMENT) .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN) .addToBackStack(OPENING_FRAGMENT).commit(); mDrawerLayout.closeDrawers(); } } }); } else { mDrawerLayout.closeDrawers(); } break; case 2: // Wan't to help out? Intent gitHub = new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.url_app))); startActivity(gitHub); mDrawerLayout.closeDrawers(); break; } } }