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.selectcalendars; import android.app.Activity; import android.content.ContentUris; import android.content.ContentValues; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.provider.CalendarContract.Calendars; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.ListView; import com.android.calendar.AsyncQueryService; import com.android.calendar.CalendarController; import com.android.calendar.CalendarController.EventInfo; import com.android.calendar.CalendarController.EventType; import com.android.calendar.Utils; import com.android.calendar.selectcalendars.CalendarColorCache.OnCalendarColorsLoadedListener; import com.congenialmobile.calendar.R; public class SelectVisibleCalendarsFragment extends Fragment implements AdapterView.OnItemClickListener, CalendarController.EventHandler, OnCalendarColorsLoadedListener { private static final String TAG = "Calendar"; private static final String IS_PRIMARY = "\"primary\""; private static final String SELECTION = Calendars.SYNC_EVENTS + "=?"; private static final String[] SELECTION_ARGS = new String[] { "1" }; private static final String[] PROJECTION = new String[] { Calendars._ID, Calendars.ACCOUNT_NAME, Calendars.ACCOUNT_TYPE, Calendars.OWNER_ACCOUNT, Calendars.CALENDAR_DISPLAY_NAME, Calendars.CALENDAR_COLOR, Calendars.VISIBLE, Calendars.SYNC_EVENTS, "(" + Calendars.ACCOUNT_NAME + "=" + Calendars.OWNER_ACCOUNT + ") AS " + IS_PRIMARY, }; private static int mUpdateToken; private static int mQueryToken; private static int mCalendarItemLayout = R.layout.mini_calendar_item; private View mView = null; private CalendarController mController; private ListView mList; private SelectCalendarsSimpleAdapter mAdapter; private Activity mContext; private AsyncQueryService mService; private Cursor mCursor; public SelectVisibleCalendarsFragment() { } public SelectVisibleCalendarsFragment(int itemLayout) { mCalendarItemLayout = itemLayout; } @Override public void onAttach(Activity activity) { super.onAttach(activity); mContext = activity; mController = CalendarController.getInstance(activity); mController.registerEventHandler(R.layout.select_calendars_fragment, this); mService = new AsyncQueryService(activity) { @Override protected void onQueryComplete(int token, Object cookie, Cursor cursor) { mAdapter.changeCursor(cursor); mCursor = cursor; } }; } @Override public void onDetach() { super.onDetach(); mController.deregisterEventHandler(R.layout.select_calendars_fragment); if (mCursor != null) { mAdapter.changeCursor(null); mCursor.close(); mCursor = null; } } @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { super.onCreateView(inflater, container, savedInstanceState); mView = inflater.inflate(R.layout.select_calendars_fragment, null); mList = (ListView) mView.findViewById(R.id.list); // Hide the Calendars to Sync button on tablets for now. // Long terms stick it in the list of calendars if (Utils.getConfigBool(getActivity(), R.bool.multiple_pane_config)) { // Don't show dividers on tablets mList.setDivider(null); View v = mView.findViewById(R.id.manage_sync_set); if (v != null) { v.setVisibility(View.GONE); } } return mView; } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); mAdapter = new SelectCalendarsSimpleAdapter(mContext, mCalendarItemLayout, null, getFragmentManager()); mList.setAdapter(mAdapter); mList.setOnItemClickListener(this); } public void onItemClick(AdapterView<?> parent, View view, int position, long id) { if (mAdapter == null || mAdapter.getCount() <= position) { return; } toggleVisibility(position); } @Override public void onResume() { super.onResume(); mQueryToken = mService.getNextToken(); mService.startQuery(mQueryToken, null, Calendars.CONTENT_URI, PROJECTION, SELECTION, SELECTION_ARGS, Calendars.ACCOUNT_NAME); } /* * Write back the changes that have been made. */ public void toggleVisibility(int position) { mUpdateToken = mService.getNextToken(); Uri uri = ContentUris.withAppendedId(Calendars.CONTENT_URI, mAdapter.getItemId(position)); ContentValues values = new ContentValues(); // Toggle the current setting int visibility = mAdapter.getVisible(position) ^ 1; values.put(Calendars.VISIBLE, visibility); mService.startUpdate(mUpdateToken, null, uri, values, null, null, 0); mAdapter.setVisible(position, visibility); } @Override public void eventsChanged() { if (mService != null) { mService.cancelOperation(mQueryToken); mQueryToken = mService.getNextToken(); mService.startQuery(mQueryToken, null, Calendars.CONTENT_URI, PROJECTION, SELECTION, SELECTION_ARGS, Calendars.ACCOUNT_NAME); } } @Override public long getSupportedEventTypes() { return EventType.EVENTS_CHANGED; } @Override public void handleEvent(EventInfo event) { eventsChanged(); } @Override public void onCalendarColorsLoaded() { if (mAdapter != null) { mAdapter.notifyDataSetChanged(); } } }