Java tutorial
/* * Copyright (c) 2012 Google Inc. * * 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.kondi.android.classroomscheduler.attendance; import java.util.ArrayList; import java.util.Collections; import java.util.List; import java.util.logging.Level; import java.util.logging.Logger; import android.accounts.AccountManager; import android.app.Activity; import android.app.AlertDialog; import android.app.Dialog; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.SharedPreferences; import android.os.Bundle; import android.view.ContextMenu; import android.view.ContextMenu.ContextMenuInfo; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView.AdapterContextMenuInfo; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.TextView; import com.google.android.gms.common.GooglePlayServicesUtil; import com.google.api.client.extensions.android.http.AndroidHttp; import com.google.api.client.googleapis.extensions.android.gms.auth.GoogleAccountCredential; import com.google.api.client.http.HttpTransport; import com.google.api.client.json.JsonFactory; import com.google.api.client.json.gson.GsonFactory; import com.google.api.services.calendar.CalendarScopes; import com.google.api.services.calendar.model.Calendar; import com.kondi.android.classroomscheduler.R; /** * Sample activity for Google Calendar API v3. It demonstrates how to use authorization to list * calendars, add a new calendar, and edit or delete an existing calendar with the user's * permission. * * <p> * <b>Warning:</b> this sample is for illustrative purposes only. Please instead use the native * Calendar APIs like the <a * href="http://developer.android.com/guide/topics/providers/calendar-provider.html">Calendar * Provider API</a>. * </p> * * @author Yaniv Inbar */ public class CalendarSampleActivity extends Activity { /** * Logging level for HTTP requests/responses. * * <p> * To turn on, set to {@link Level#CONFIG} or {@link Level#ALL} and run this from command line: * </p> * * <pre> adb shell setprop log.tag.HttpTransport DEBUG * </pre> */ private static final Level LOGGING_LEVEL = Level.OFF; private static final String PREF_ACCOUNT_NAME = "accountName"; static final String TAG = "CalendarSampleActivity"; private static final int CONTEXT_EDIT = 0; private static final int CONTEXT_DELETE = 1; private static final int CONTEXT_BATCH_ADD = 2; static final int REQUEST_GOOGLE_PLAY_SERVICES = 0; static final int REQUEST_AUTHORIZATION = 1; static final int REQUEST_ACCOUNT_PICKER = 2; private final static int ADD_OR_EDIT_CALENDAR_REQUEST = 3; final HttpTransport transport = AndroidHttp.newCompatibleTransport(); final JsonFactory jsonFactory = GsonFactory.getDefaultInstance(); GoogleAccountCredential credential; CalendarModel model = new CalendarModel(); ArrayAdapter<CalendarInfo> adapter; com.google.api.services.calendar.Calendar client; int numAsyncTasks; private ListView listView; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // enable logging Logger.getLogger("com.google.api.client").setLevel(LOGGING_LEVEL); // view and menu setContentView(R.layout.calendarlist); listView = (ListView) findViewById(R.id.list); registerForContextMenu(listView); // Google Accounts credential = GoogleAccountCredential.usingOAuth2(this, Collections.singleton(CalendarScopes.CALENDAR)); SharedPreferences settings = getPreferences(Context.MODE_PRIVATE); credential.setSelectedAccountName(settings.getString(PREF_ACCOUNT_NAME, null)); // Calendar client client = new com.google.api.services.calendar.Calendar.Builder(transport, jsonFactory, credential) .setApplicationName("Google-CalendarAndroidSample/1.0").build(); } void showGooglePlayServicesAvailabilityErrorDialog(final int connectionStatusCode) { runOnUiThread(new Runnable() { public void run() { Dialog dialog = GooglePlayServicesUtil.getErrorDialog(connectionStatusCode, CalendarSampleActivity.this, REQUEST_GOOGLE_PLAY_SERVICES); dialog.show(); } }); } void refreshView() { adapter = new ArrayAdapter<CalendarInfo>(this, android.R.layout.simple_list_item_1, model.toSortedArray()) { @Override public View getView(int position, View convertView, ViewGroup parent) { // by default it uses toString; override to use summary instead TextView view = (TextView) super.getView(position, convertView, parent); CalendarInfo calendarInfo = getItem(position); view.setText(calendarInfo.summary); return view; } }; listView.setAdapter(adapter); } @Override protected void onResume() { super.onResume(); if (checkGooglePlayServicesAvailable()) { haveGooglePlayServices(); } } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); switch (requestCode) { case REQUEST_GOOGLE_PLAY_SERVICES: if (resultCode == Activity.RESULT_OK) { haveGooglePlayServices(); } else { checkGooglePlayServicesAvailable(); } break; case REQUEST_AUTHORIZATION: if (resultCode == Activity.RESULT_OK) { AsyncLoadCalendars.run(this); } else { chooseAccount(); } break; case REQUEST_ACCOUNT_PICKER: if (resultCode == Activity.RESULT_OK && data != null && data.getExtras() != null) { String accountName = data.getExtras().getString(AccountManager.KEY_ACCOUNT_NAME); if (accountName != null) { credential.setSelectedAccountName(accountName); SharedPreferences settings = getPreferences(Context.MODE_PRIVATE); SharedPreferences.Editor editor = settings.edit(); editor.putString(PREF_ACCOUNT_NAME, accountName); editor.commit(); AsyncLoadCalendars.run(this); } } break; case ADD_OR_EDIT_CALENDAR_REQUEST: if (resultCode == Activity.RESULT_OK) { Calendar calendar = new Calendar(); calendar.setSummary(data.getStringExtra("summary")); String id = data.getStringExtra("id"); if (id == null) { new AsyncInsertCalendar(this, calendar).execute(); } else { calendar.setId(id); new AsyncUpdateCalendar(this, id, calendar).execute(); } } break; } } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.main_menu, menu); return super.onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.menu_refresh: AsyncLoadCalendars.run(this); break; case R.id.menu_accounts: chooseAccount(); return true; } return super.onOptionsItemSelected(item); } @Override public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { super.onCreateContextMenu(menu, v, menuInfo); menu.add(0, CONTEXT_EDIT, 0, R.string.edit); menu.add(0, CONTEXT_DELETE, 0, R.string.delete); menu.add(0, CONTEXT_BATCH_ADD, 0, R.string.batchadd); } @Override public boolean onContextItemSelected(MenuItem item) { AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo(); int calendarIndex = (int) info.id; if (calendarIndex < adapter.getCount()) { final CalendarInfo calendarInfo = adapter.getItem(calendarIndex); switch (item.getItemId()) { case CONTEXT_EDIT: startAddOrEditCalendarActivity(calendarInfo); return true; case CONTEXT_DELETE: new AlertDialog.Builder(this).setTitle(R.string.delete_title).setMessage(calendarInfo.summary) .setCancelable(false) .setPositiveButton(R.string.yes, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { new AsyncDeleteCalendar(CalendarSampleActivity.this, calendarInfo).execute(); } }).setNegativeButton(R.string.no, null).create().show(); return true; case CONTEXT_BATCH_ADD: List<Calendar> calendars = new ArrayList<Calendar>(); for (int i = 0; i < 3; i++) { Calendar cal = new Calendar(); cal.setSummary(calendarInfo.summary + " [" + (i + 1) + "]"); calendars.add(cal); } new AsyncBatchInsertCalendars(this, calendars).execute(); return true; } } return super.onContextItemSelected(item); } public void onAddClick(View view) { startAddOrEditCalendarActivity(null); } /** Check that Google Play services APK is installed and up to date. */ private boolean checkGooglePlayServicesAvailable() { final int connectionStatusCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this); if (GooglePlayServicesUtil.isUserRecoverableError(connectionStatusCode)) { showGooglePlayServicesAvailabilityErrorDialog(connectionStatusCode); return false; } return true; } private void haveGooglePlayServices() { // check if there is already an account selected if (credential.getSelectedAccountName() == null) { // ask user to choose account chooseAccount(); } else { // load calendars AsyncLoadCalendars.run(this); } } private void chooseAccount() { startActivityForResult(credential.newChooseAccountIntent(), REQUEST_ACCOUNT_PICKER); } private void startAddOrEditCalendarActivity(CalendarInfo calendarInfo) { Intent intent = new Intent(this, AddOrEditCalendarActivity.class); if (calendarInfo != null) { intent.putExtra("id", calendarInfo.id); intent.putExtra("summary", calendarInfo.summary); } startActivityForResult(intent, ADD_OR_EDIT_CALENDAR_REQUEST); } }