Java tutorial
/* * Copyright 2011 Google Inc. * Copyright 2011 Peter Kuterna * * 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 net.peterkuterna.android.apps.devoxxfrsched.ui; import net.peterkuterna.android.apps.devoxxfrsched.R; import net.peterkuterna.android.apps.devoxxfrsched.provider.CfpContract; import net.peterkuterna.android.apps.devoxxfrsched.provider.CfpContract.Sessions; import net.peterkuterna.android.apps.devoxxfrsched.provider.CfpContract.Tracks; import net.peterkuterna.android.apps.devoxxfrsched.ui.widget.ScrollableTabs; import net.peterkuterna.android.apps.devoxxfrsched.ui.widget.ScrollableTabsAdapter; import net.peterkuterna.android.apps.devoxxfrsched.util.ActivityHelper; import net.peterkuterna.android.apps.devoxxfrsched.util.AnalyticsUtils; import net.peterkuterna.android.apps.devoxxfrsched.util.FractionalTouchDelegate; import net.peterkuterna.android.apps.devoxxfrsched.util.NotifyingAsyncQueryHandler; import net.peterkuterna.android.apps.devoxxfrsched.util.UIUtils; import android.content.ContentValues; import android.content.Context; import android.content.Intent; import android.database.Cursor; import android.graphics.RectF; import android.net.Uri; import android.os.Bundle; import android.os.Handler; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.LoaderManager; import android.support.v4.app.LoaderManager.LoaderCallbacks; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.support.v4.view.ViewPager; import android.text.TextUtils; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.CompoundButton; import android.widget.LinearLayout; import android.widget.TextView; import com.actionbarsherlock.app.SherlockFragment; import com.actionbarsherlock.view.Menu; import com.actionbarsherlock.view.MenuInflater; import com.actionbarsherlock.view.MenuItem; /** * A fragment that shows detail information for a session. Summary, notes, * and parallel sessions are shown in a (@link {@link ViewPager}. */ public class SessionDetailFragment extends SherlockFragment implements CompoundButton.OnCheckedChangeListener { private static final String TAG = "SessionDetailFragment"; public static final String CONFERENCE_HASHTAG = "#devoxxfr"; public static final String EXTRA_TRACK_COLOR = "net.peterkuterna.android.apps.devoxxfrsched.extra.TRACK_COLOR"; private static final int[] TAB_TITLES = { R.string.session_summary, R.string.session_notes, R.string.session_parallel }; private String mTrackName = null; private String mHashtag = null; private int mTrackColor = -1; private Uri mSessionUri; private String mSessionId; private String mTitleString; private String mRoomId; private int mLevel; private String mUrl; private ViewGroup mRootView; private ScrollableTabs mTabs; private ViewPager mViewPager; private SessionDetailPagerAdapter mAdapter; private TextView mTitle; private TextView mSubtitle; private CompoundButton mStarred; private Handler mHandler = new Handler(); private NotifyingAsyncQueryHandler mQueryHandler; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); final Intent intent = ActivityHelper.fragmentArgumentsToIntent(getArguments()); mSessionUri = intent.getData(); if (mSessionUri == null) { return; } mSessionId = Sessions.getSessionId(mSessionUri); setHasOptionsMenu(true); } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); if (mSessionUri == null) { return; } final Intent intent = ActivityHelper.fragmentArgumentsToIntent(getArguments()); mSessionUri = intent.getData(); mTrackName = intent.getStringExtra(Intent.EXTRA_TITLE); mTrackColor = intent.getIntExtra(EXTRA_TRACK_COLOR, -1); if (TextUtils.isEmpty(mTrackName) || mTrackColor == -1) { final Uri trackUri = Sessions.buildTracksDirUri(mSessionId); Bundle args = new Bundle(); args.putParcelable("uri", trackUri); getLoaderManager().initLoader(TracksQuery._TOKEN, args, mTrackLoaderCallback); } else { updateTrackData(); } mAdapter = new SessionDetailPagerAdapter(getActivity(), getFragmentManager()); mViewPager.setAdapter(mAdapter); mTabs.setAdapter(mAdapter); mViewPager.setOnPageChangeListener(mTabs); mQueryHandler = new NotifyingAsyncQueryHandler(getActivity().getContentResolver(), null); } @Override public void onResume() { super.onResume(); getLoaderManager().restartLoader(SessionsQuery._TOKEN, null, mSessionDetailCallback); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { mRootView = (ViewGroup) inflater.inflate(R.layout.fragment_session_detail, null); mTabs = (ScrollableTabs) mRootView.findViewById(R.id.viewpagerheader_session_detail); mViewPager = (ViewPager) mRootView.findViewById(R.id.viewpager_session_detail); mViewPager.setPageMargin(getResources().getDimensionPixelSize(R.dimen.viewpager_page_margin)); mViewPager.setPageMarginDrawable(R.drawable.viewpager_margin); mTitle = (TextView) mRootView.findViewById(R.id.session_title); mSubtitle = (TextView) mRootView.findViewById(R.id.session_subtitle); mStarred = (CompoundButton) mRootView.findViewById(R.id.star_button); mStarred.setFocusable(true); mStarred.setClickable(true); // Larger target triggers star toggle final View starParent = mRootView.findViewById(R.id.header_session); FractionalTouchDelegate.setupDelegate(starParent, mStarred, new RectF(0.6f, 0f, 1f, 0.8f)); return mRootView; } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { inflater.inflate(R.menu.session_detail_menu_items, menu); super.onCreateOptionsMenu(menu, inflater); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.menu_map: { final Intent intent = new Intent(getActivity().getApplicationContext(), MapActivity.class); intent.putExtra(MapActivity.EXTRA_LEVEL, mLevel); startActivity(intent); return true; } case R.id.menu_share: { final String shareString = getString(R.string.share_template, mTitleString, getHashtagsString(), mUrl); final Intent intent = new Intent(Intent.ACTION_SEND); intent.setType("text/plain"); intent.putExtra(Intent.EXTRA_TEXT, shareString); startActivity(Intent.createChooser(intent, getText(R.string.title_share))); return true; } } return super.onOptionsItemSelected(item); } private String getHashtagsString() { if (!TextUtils.isEmpty(mHashtag)) { return CONFERENCE_HASHTAG + " #" + mHashtag; } else { return CONFERENCE_HASHTAG; } } private void updateTrackData() { if (!UIUtils.isHoneycombTablet(getActivity())) { UIUtils.setActionBarData(getSherlockActivity(), mTrackName, mTrackColor); } } /** * Handle toggling of starred checkbox. */ public void onCheckedChanged(CompoundButton buttonView, final boolean isChecked) { final ContentValues values = new ContentValues(); values.put(CfpContract.Sessions.SESSION_STARRED, isChecked ? 1 : 0); values.put(CfpContract.Sessions.SESSION_OPERATION_PENDING, 0); mQueryHandler.startUpdate(mSessionUri, values); // SharedPreferences prefs = Prefs.get(getActivity()); // String deviceRegistrationID = prefs.getString( // DevoxxPrefs.DEVICE_REGISTRATION_ID, null); // if (deviceRegistrationID != null) { // new AsyncTask<Void, Void, Boolean>() { // // @Override // protected void onPreExecute() { // final ContentValues values = new ContentValues(); // values.put(CfpContract.Sessions.SESSION_OPERATION_PENDING, // 1); // mQueryHandler.startUpdate(mSessionUri, values); // } // // @Override // protected void onPostExecute(Boolean result) { // if (Boolean.TRUE.equals(result)) { // final ContentValues values = new ContentValues(); // values.put( // CfpContract.Sessions.SESSION_OPERATION_PENDING, // 0); // mQueryHandler.startUpdate(mSessionUri, values); // } // } // // @Override // protected Boolean doInBackground(Void... arg0) { // try { // DevoxxRequestFactory factory = (DevoxxRequestFactory) Util // .getRequestFactory(getActivity(), // DevoxxRequestFactory.class); // DevoxxRequest request = factory.devoxxRequest(); // // SessionProxy session = request // .create(SessionProxy.class); // session.setSessionId(mSessionId); // // if (isChecked) { // request.star(session).fire(); // } else { // request.unstar(session).fire(); // } // } catch (Exception e) { // return Boolean.FALSE; // } // // return Boolean.TRUE; // } // // }.execute(); // } // Because change listener is set to null during initialization, these // won't fire on // pageview. AnalyticsUtils.getInstance(getActivity()).trackEvent("Session", isChecked ? "Starred" : "Unstarred", mTitleString, 0); } private LoaderManager.LoaderCallbacks<Cursor> mSessionDetailCallback = new LoaderCallbacks<Cursor>() { @Override public Loader<Cursor> onCreateLoader(int id, Bundle args) { return new CursorLoader(getActivity(), mSessionUri, SessionsQuery.PROJECTION, null, null, null); } @Override public void onLoadFinished(Loader<Cursor> loader, Cursor data) { if (!data.moveToFirst()) { return; } // Format time block this session occupies final long blockStart = data.getLong(SessionsQuery.BLOCK_START); final long blockEnd = data.getLong(SessionsQuery.BLOCK_END); final String roomName = data.getString(SessionsQuery.ROOM_NAME); mRoomId = data.getString(SessionsQuery.ROOM_ID); mLevel = data.getInt(SessionsQuery.ROOM_LEVEL); final String subtitle = UIUtils.formatSessionSubtitle(blockStart, blockEnd, roomName, getActivity()); final int starred = data.getInt(SessionsQuery.STARRED); mTitleString = data.getString(SessionsQuery.TITLE); mUrl = data.getString(SessionsQuery.URL); mHashtag = data.getString(SessionsQuery.TRACK_HASHTAG); AnalyticsUtils.getInstance(getActivity()).trackPageView("/Sessions/" + mTitleString); mHandler.post(new Runnable() { @Override public void run() { mTitle.setText(mTitleString); mSubtitle.setText(subtitle); // Unregister around setting checked state to avoid // triggering listener since change isn't user generated. mStarred.setOnCheckedChangeListener(null); mStarred.setChecked(starred != 0); mStarred.setOnCheckedChangeListener(SessionDetailFragment.this); } }); } @Override public void onLoaderReset(Loader<Cursor> loader) { } }; private LoaderManager.LoaderCallbacks<Cursor> mTrackLoaderCallback = new LoaderCallbacks<Cursor>() { @Override public Loader<Cursor> onCreateLoader(int id, Bundle args) { final Uri uri = args.getParcelable("uri"); return new CursorLoader(getActivity(), uri, TracksQuery.PROJECTION, null, null, null); } @Override public void onLoadFinished(Loader<Cursor> loader, Cursor data) { if (!data.moveToFirst()) { return; } mTrackName = data.getString(TracksQuery.TRACK_NAME); mTrackColor = data.getInt(TracksQuery.TRACK_COLOR); mHandler.post(new Runnable() { @Override public void run() { updateTrackData(); } }); } @Override public void onLoaderReset(Loader<Cursor> loader) { } }; private class SessionDetailPagerAdapter extends FragmentPagerAdapter implements ScrollableTabsAdapter { private final boolean mIsHoneycombTablet; public SessionDetailPagerAdapter(Context context, FragmentManager fm) { super(fm); this.mIsHoneycombTablet = UIUtils.isHoneycombTablet(context); } @Override public TextView getTab(final int position, LinearLayout root) { final TextView indicator = (TextView) getActivity().getLayoutInflater().inflate(R.layout.tab_indicator, null, false); indicator.setText(TAB_TITLES[position]); indicator.setOnClickListener(new OnClickListener() { @Override public void onClick(final View v) { mViewPager.setCurrentItem(position); } }); return indicator; } @Override public Fragment getItem(int position) { if (position == 0) { return SessionSummaryFragment.newInstance(mSessionId); } else if (position == 1) { return SessionNotesFragment.newInstance(mSessionId); } else if (position == 2) { SessionsFragment f = new SessionsFragment(); final Intent intent = new Intent(Intent.ACTION_VIEW, Sessions.buildSessionsParallelDirUri(mSessionId)); f.setArguments(ActivityHelper.intentToFragmentArguments(intent)); return f; } return null; } @Override public int getCount() { return 3; // return UIUtils.isHoneycomb() ? 5 : 4; } @Override protected String makeFragmentName(int viewId, int index) { return "android:switcher:" + mSessionId + ":" + viewId + ":" + index; } } /** * {@link Sessions} query parameters. */ private interface SessionsQuery { int _TOKEN = 0x1; String[] PROJECTION = { CfpContract.Blocks.BLOCK_START, CfpContract.Blocks.BLOCK_END, CfpContract.Sessions.SESSION_ID, CfpContract.Sessions.SESSION_TITLE, CfpContract.Sessions.SESSION_STARRED, CfpContract.Sessions.SESSION_URL, CfpContract.Rooms.ROOM_ID, CfpContract.Rooms.ROOM_NAME, CfpContract.Rooms.ROOM_LEVEL, CfpContract.Tracks.TRACK_HASHTAG }; int BLOCK_START = 0; int BLOCK_END = 1; int SESSION_ID = 2; int TITLE = 3; int STARRED = 4; int URL = 5; int ROOM_ID = 6; int ROOM_NAME = 7; int ROOM_LEVEL = 8; int TRACK_HASHTAG = 9; } /** * {@link Tracks} query parameters. */ private interface TracksQuery { int _TOKEN = 0x2; String[] PROJECTION = { CfpContract.Tracks.TRACK_NAME, CfpContract.Tracks.TRACK_COLOR }; int TRACK_NAME = 0; int TRACK_COLOR = 1; } }