Java tutorial
/* * Pebble Messenger is used to display non-english message on Pebble. * Copyright (C) 2014 Yang Tsao * * 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 2 * 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. */ package com.yangtsaosoftware.pebblemessenger.activities; import android.app.ActionBar; import android.app.Activity; import android.app.Fragment; import android.app.FragmentManager; import android.os.Bundle; import android.preference.PreferenceManager; import android.support.v4.widget.DrawerLayout; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import com.yangtsaosoftware.pebblemessenger.Constants; import com.yangtsaosoftware.pebblemessenger.R; public class NavigationActivity extends Activity implements NavigationDrawerFragment.NavigationDrawerCallbacks { /** * Fragment managing the behaviors, interactions and presentation of the navigation drawer. */ private NavigationDrawerFragment mNavigationDrawerFragment; /** * Used to store the last screen title. For use in {@link #restoreActionBar()}. */ private CharSequence mTitle; private static final String CLASS_TAG = "Navigate_Main"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_navigation); mNavigationDrawerFragment = (NavigationDrawerFragment) getFragmentManager() .findFragmentById(R.id.navigation_drawer); mTitle = getTitle(); // Set up the drawer. mNavigationDrawerFragment.setUp(R.id.navigation_drawer, (DrawerLayout) findViewById(R.id.drawer_layout)); } @Override public void onNavigationDrawerItemSelected(int position) { // update the main content by replacing fragments Constants.log(CLASS_TAG, "Navigation Item Selected:" + String.valueOf(position)); FragmentManager fragmentManager = getFragmentManager(); switch (position) { case 0: fragmentManager.beginTransaction().replace(R.id.container, new SettingFragment()).commit(); break; case 1: fragmentManager.beginTransaction().replace(R.id.container, new SetupFragment()).commit(); break; case 2: fragmentManager.beginTransaction().replace(R.id.container, new ToolsFragment()).commit(); break; case 3: fragmentManager.beginTransaction().replace(R.id.container, new PlaceholderFragment()).commit(); break; } } public void onSectionAttached(int number) { Constants.log(CLASS_TAG, "Section Attached:" + String.valueOf(number)); switch (number) { case 0: mTitle = getString(R.string.title_setting_activity); break; case 1: mTitle = getString(R.string.title_setup_activity); break; case 2: mTitle = getString(R.string.title_tools_activity); break; case 3: mTitle = getString(R.string.title_about_activity); break; } } public void restoreActionBar() { ActionBar actionBar = getActionBar(); if (actionBar != null) { actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD); actionBar.setDisplayShowTitleEnabled(true); actionBar.setTitle(mTitle); } } @Override public boolean onCreateOptionsMenu(Menu menu) { if (!mNavigationDrawerFragment.isDrawerOpen()) { // Only show items in the action bar relevant to this screen // if the drawer is not showing. Otherwise, let the drawer // decide what to show in the action bar. getMenuInflater().inflate(R.menu.navigation, menu); restoreActionBar(); return true; } return super.onCreateOptionsMenu(menu); } @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(); if (id == R.id.action_settings) { PreferenceManager.setDefaultValues(this, R.xml.preference, true); return true; } return super.onOptionsItemSelected(item); } /** * A placeholder fragment containing a simple view. */ public static class PlaceholderFragment extends Fragment { /** * The fragment argument representing the section number for this * fragment. */ private static final String ARG_SECTION_NUMBER = "section_number"; /** * Returns a new instance of this fragment for the given section * number. */ public static PlaceholderFragment newInstance(int sectionNumber) { PlaceholderFragment fragment = new PlaceholderFragment(); Bundle args = new Bundle(); args.putInt(ARG_SECTION_NUMBER, sectionNumber); fragment.setArguments(args); return fragment; } public PlaceholderFragment() { } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_navigation, container, false); return rootView; } @Override public void onAttach(Activity activity) { super.onAttach(activity); ((NavigationActivity) activity).onSectionAttached(3); } } }