Java tutorial
/* * CMPUT 301 Winter 2014 Assignment 1 - Counter App for Android * * Copyright 2014 Artem Herasymchuk * * 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. * * --- * * CounterSummaryActivity.java * * This Activity is responsible for displaying the summary * of counters to the user, either for one or for all counters, * organized by minute/hour/day/week/month. * */ package com.herasymc.cmput301counter; import java.util.ArrayList; import android.app.ActionBar; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.NavUtils; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.ListView; public class CounterSummaryActivity extends FragmentActivity implements ActionBar.OnNavigationListener { /** * The serialization (saved instance state) Bundle key representing the * current dropdown position. */ private static final String STATE_SELECTED_NAVIGATION_ITEM = "selected_navigation_item"; private static CounterList list; private int id; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_counter_summary); list = CounterList.getInstance(getApplicationContext()); id = (int) getIntent().getLongExtra("id", -1); // if id is -1, summarize all counters // Set up the action bar to show a dropdown list. final ActionBar actionBar = getActionBar(); actionBar.setDisplayShowTitleEnabled(false); actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST); // Show the Up button in the action bar. actionBar.setDisplayHomeAsUpEnabled(true); // Set up the dropdown list navigation in the action bar. actionBar.setListNavigationCallbacks( // Specify a SpinnerAdapter to populate the dropdown list. new ArrayAdapter<String>(actionBar.getThemedContext(), android.R.layout.simple_list_item_1, android.R.id.text1, new String[] { getString(R.string.title_summary_minute), getString(R.string.title_summary_hour), getString(R.string.title_summary_day), getString(R.string.title_summary_week), getString(R.string.title_summary_month) }), this); } @Override public void onRestoreInstanceState(Bundle savedInstanceState) { // Restore the previously serialized current dropdown position. if (savedInstanceState.containsKey(STATE_SELECTED_NAVIGATION_ITEM)) { getActionBar().setSelectedNavigationItem(savedInstanceState.getInt(STATE_SELECTED_NAVIGATION_ITEM)); } } @Override public void onSaveInstanceState(Bundle outState) { // Serialize the current dropdown position. outState.putInt(STATE_SELECTED_NAVIGATION_ITEM, getActionBar().getSelectedNavigationIndex()); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.counter_summary, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case android.R.id.home: NavUtils.navigateUpFromSameTask(this); return true; } return super.onOptionsItemSelected(item); } @Override public boolean onNavigationItemSelected(int position, long id) { // When the given dropdown item is selected, show its contents in the // container view. Fragment fragment = new CounterSummaryFragment(); Bundle args = new Bundle(); args.putInt(CounterSummaryFragment.ARG_SECTION_NUMBER, position); args.putInt(CounterSummaryFragment.ARG_ID_NUMBER, this.id); fragment.setArguments(args); getSupportFragmentManager().beginTransaction().replace(R.id.container, fragment).commit(); return true; } /** * This fragment shows the actual summary. */ public static class CounterSummaryFragment extends Fragment { /** * The fragment argument representing the section number for this * fragment. */ public static final String ARG_SECTION_NUMBER = "section_number"; public static final String ARG_ID_NUMBER = "id_number"; public CounterSummaryFragment() { } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_counter_summary, container, false); ListView view = (ListView) rootView.findViewById(R.id.section_label); ArrayAdapter<String> adapter; if (getArguments().getInt(ARG_ID_NUMBER) == -1) { /* build a list of stats of all counters */ ArrayList<String> strings = new ArrayList<String>(); for (int i = 0; i < list.size(); ++i) { strings.add(list.get(i).getName() + ":"); strings.addAll(list.getHistory(i, getArguments().getInt(ARG_SECTION_NUMBER))); } adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, strings); } else { /* show stats for just one counter */ adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, list.getHistory(getArguments().getInt(ARG_ID_NUMBER), getArguments().getInt(ARG_SECTION_NUMBER))); } view.setAdapter(adapter); return rootView; } } }