Java tutorial
/* * Copyright (C) 2010 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.android.calendar; import com.android.calendar.CalendarController.EventInfo; import com.android.calendar.CalendarController.EventType; import com.congenialmobile.calendar.R; import android.support.v4.app.Fragment; import android.content.Context; import android.os.Bundle; import android.text.format.Time; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.ViewGroup.LayoutParams; import android.view.animation.Animation; import android.view.animation.AnimationUtils; import android.widget.ProgressBar; import android.widget.ViewSwitcher; import android.widget.ViewSwitcher.ViewFactory; /** * This is the base class for Day and Week Activities. */ public class DayFragment extends Fragment implements CalendarController.EventHandler, ViewFactory { /** * The view id used for all the views we create. It's OK to have all child * views have the same ID. This ID is used to pick which view receives * focus when a view hierarchy is saved / restore */ private static final int VIEW_ID = 1; protected static final String BUNDLE_KEY_RESTORE_TIME = "key_restore_time"; protected ProgressBar mProgressBar; protected ViewSwitcher mViewSwitcher; protected Animation mInAnimationForward; protected Animation mOutAnimationForward; protected Animation mInAnimationBackward; protected Animation mOutAnimationBackward; EventLoader mEventLoader; Time mSelectedDay = new Time(); private final Runnable mTZUpdater = new Runnable() { @Override public void run() { if (!DayFragment.this.isAdded()) { return; } String tz = Utils.getTimeZone(getActivity(), mTZUpdater); mSelectedDay.timezone = tz; mSelectedDay.normalize(true); } }; private int mNumDays; public DayFragment() { mSelectedDay.setToNow(); } public DayFragment(long timeMillis, int numOfDays) { mNumDays = numOfDays; if (timeMillis == 0) { mSelectedDay.setToNow(); } else { mSelectedDay.set(timeMillis); } } @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); Context context = getActivity(); mInAnimationForward = AnimationUtils.loadAnimation(context, R.anim.slide_left_in); mOutAnimationForward = AnimationUtils.loadAnimation(context, R.anim.slide_left_out); mInAnimationBackward = AnimationUtils.loadAnimation(context, R.anim.slide_right_in); mOutAnimationBackward = AnimationUtils.loadAnimation(context, R.anim.slide_right_out); mEventLoader = new EventLoader(context); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View v = inflater.inflate(R.layout.day_activity, null); mViewSwitcher = (ViewSwitcher) v.findViewById(R.id.switcher); mViewSwitcher.setFactory(this); mViewSwitcher.getCurrentView().requestFocus(); ((DayView) mViewSwitcher.getCurrentView()).updateTitle(); return v; } public View makeView() { mTZUpdater.run(); DayView view = new DayView(getActivity(), CalendarController.getInstance(getActivity()), mViewSwitcher, mEventLoader, mNumDays); view.setId(VIEW_ID); view.setLayoutParams(new ViewSwitcher.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT)); view.setSelected(mSelectedDay, false, false); return view; } @Override public void onResume() { super.onResume(); mEventLoader.startBackgroundThread(); mTZUpdater.run(); eventsChanged(); DayView view = (DayView) mViewSwitcher.getCurrentView(); view.handleOnResume(); view.restartCurrentTimeUpdates(); view = (DayView) mViewSwitcher.getNextView(); view.handleOnResume(); view.restartCurrentTimeUpdates(); } @Override public void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); long time = getSelectedTimeInMillis(); if (time != -1) { outState.putLong(BUNDLE_KEY_RESTORE_TIME, time); } } @Override public void onPause() { super.onPause(); DayView view = (DayView) mViewSwitcher.getCurrentView(); view.cleanup(); view = (DayView) mViewSwitcher.getNextView(); view.cleanup(); mEventLoader.stopBackgroundThread(); // Stop events cross-fade animation view.stopEventsAnimation(); ((DayView) mViewSwitcher.getNextView()).stopEventsAnimation(); } void startProgressSpinner() { // start the progress spinner mProgressBar.setVisibility(View.VISIBLE); } void stopProgressSpinner() { // stop the progress spinner mProgressBar.setVisibility(View.GONE); } private void goTo(Time goToTime, boolean ignoreTime, boolean animateToday) { if (mViewSwitcher == null) { // The view hasn't been set yet. Just save the time and use it later. mSelectedDay.set(goToTime); return; } DayView currentView = (DayView) mViewSwitcher.getCurrentView(); // How does goTo time compared to what's already displaying? int diff = currentView.compareToVisibleTimeRange(goToTime); if (diff == 0) { // In visible range. No need to switch view currentView.setSelected(goToTime, ignoreTime, animateToday); } else { // Figure out which way to animate if (diff <= 0) { mViewSwitcher.setInAnimation(mInAnimationForward); mViewSwitcher.setOutAnimation(mOutAnimationForward); } else { mViewSwitcher.setInAnimation(mInAnimationBackward); mViewSwitcher.setOutAnimation(mOutAnimationBackward); } DayView next = (DayView) mViewSwitcher.getNextView(); if (ignoreTime) { next.setFirstVisibleHour(currentView.getFirstVisibleHour()); } next.setSelected(goToTime, ignoreTime, animateToday); next.reloadEvents(); mViewSwitcher.showNext(); next.requestFocus(); next.updateTitle(); next.restartCurrentTimeUpdates(); } } /** * Returns the selected time in milliseconds. The milliseconds are measured * in UTC milliseconds from the epoch and uniquely specifies any selectable * time. * * @return the selected time in milliseconds */ public long getSelectedTimeInMillis() { if (mViewSwitcher == null) { return -1; } DayView view = (DayView) mViewSwitcher.getCurrentView(); if (view == null) { return -1; } return view.getSelectedTimeInMillis(); } public void eventsChanged() { if (mViewSwitcher == null) { return; } DayView view = (DayView) mViewSwitcher.getCurrentView(); view.clearCachedEvents(); view.reloadEvents(); view = (DayView) mViewSwitcher.getNextView(); view.clearCachedEvents(); } Event getSelectedEvent() { DayView view = (DayView) mViewSwitcher.getCurrentView(); return view.getSelectedEvent(); } boolean isEventSelected() { DayView view = (DayView) mViewSwitcher.getCurrentView(); return view.isEventSelected(); } Event getNewEvent() { DayView view = (DayView) mViewSwitcher.getCurrentView(); return view.getNewEvent(); } public DayView getNextView() { return (DayView) mViewSwitcher.getNextView(); } public long getSupportedEventTypes() { return EventType.GO_TO | EventType.EVENTS_CHANGED; } public void handleEvent(EventInfo msg) { if (msg.eventType == EventType.GO_TO) { // TODO support a range of time // TODO support event_id // TODO support select message goTo(msg.selectedTime, (msg.extraLong & CalendarController.EXTRA_GOTO_DATE) != 0, (msg.extraLong & CalendarController.EXTRA_GOTO_TODAY) != 0); } else if (msg.eventType == EventType.EVENTS_CHANGED) { eventsChanged(); } } }