Java tutorial
package edu.mit.mobile.android.livingpostcards; /* * Copyright (C) 2012-2013 MIT Mobile Experience Lab * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation version 2 * of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import java.io.IOException; import android.app.Activity; import android.database.Cursor; import android.graphics.drawable.Drawable; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.LoaderManager.LoaderCallbacks; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.animation.AnimationUtils; import android.widget.TextView; import edu.mit.mobile.android.content.ProviderUtils; import edu.mit.mobile.android.flipr.BuildConfig; import edu.mit.mobile.android.flipr.R; import edu.mit.mobile.android.imagecache.ImageCache; import edu.mit.mobile.android.imagecache.ImageCache.OnImageLoadListener; import edu.mit.mobile.android.livingpostcards.auth.Authenticator; import edu.mit.mobile.android.livingpostcards.data.Card; import edu.mit.mobile.android.locast.app.LocastApplication; import edu.mit.mobile.android.locast.sync.LocastSyncService; import edu.mit.mobile.android.maps.GoogleStaticMapView; import edu.mit.mobile.android.maps.OnMapUpdateListener; public class CardDetailsFragment extends Fragment implements LoaderCallbacks<Cursor>, OnImageLoadListener, OnMapUpdateListener { /** * The card URI */ public static final String ARGUMENT_URI = "uri"; private Uri mCard; private GoogleStaticMapView mStaticMap; private int mTiming; private Uri mCardMedia; private ImageCache mImageCache; private final static int LOADER_CARD = 100; private static final String[] CARD_PROJECTION = new String[] { Card._ID, Card.COL_ANIMATED_RENDER, Card.COL_DESCRIPTION, Card.COL_COVER_PHOTO, Card.COL_TIMING, Card.COL_LATITUDE, Card.COL_LONGITUDE, Card.COL_MEDIA_URL }; private static final String TAG = CardDetailsFragment.class.getSimpleName(); public static CardDetailsFragment newInstance(Uri card) { final CardDetailsFragment cmf = new CardDetailsFragment(); final Bundle args = new Bundle(); args.putParcelable(ARGUMENT_URI, card); cmf.setArguments(args); return cmf; } @Override public void onAttach(Activity activity) { super.onAttach(activity); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mImageCache = ImageCache.getInstance(getActivity()); if (getArguments() != null) { mCard = getArguments().getParcelable(ARGUMENT_URI); if (mCard != null) { mCardMedia = Card.MEDIA.getUri(mCard); getLoaderManager().initLoader(LOADER_CARD, null, this); } } } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { final View v = inflater.inflate(R.layout.card_details_fragment, container, false); mStaticMap = (GoogleStaticMapView) v.findViewById(R.id.static_map); mStaticMap.setOnMapUpdateListener(this); return v; } @Override public void onResume() { super.onResume(); mImageCache.registerOnImageLoadListener(this); LocastSyncService.startExpeditedAutomaticSync(getActivity(), mCard); } @Override public void onPause() { super.onPause(); mImageCache.unregisterOnImageLoadListener(this); } @Override public Loader<Cursor> onCreateLoader(int id, Bundle arg1) { switch (id) { case LOADER_CARD: return new CursorLoader(getActivity(), mCard, CARD_PROJECTION, null, null, null); default: return null; } } @Override public void onLoadFinished(Loader<Cursor> loader, Cursor c) { switch (loader.getId()) { case LOADER_CARD: if (c.moveToFirst()) { if (BuildConfig.DEBUG) { ProviderUtils.dumpCursorToLog(c, CARD_PROJECTION); } final View v = getView(); final String description = c.getString(c.getColumnIndexOrThrow(Card.COL_DESCRIPTION)); final TextView descriptionTv = ((TextView) v.findViewById(R.id.description)); if (description != null && description.length() > 0) { descriptionTv.setVisibility(View.VISIBLE); descriptionTv.setText(description); } else { descriptionTv.setVisibility(View.GONE); } mStaticMap.setMap(c.getFloat(c.getColumnIndexOrThrow(Card.COL_LATITUDE)), c.getFloat(c.getColumnIndexOrThrow(Card.COL_LONGITUDE)), false); mTiming = c.getInt(c.getColumnIndexOrThrow(Card.COL_TIMING)); final String pubMediaUri = c.getString(c.getColumnIndexOrThrow(Card.COL_MEDIA_URL)); if (pubMediaUri != null) { LocastSyncService.startSync(getActivity(), ((LocastApplication) getActivity().getApplication()) .getNetworkClient(getActivity(), Authenticator.getFirstAccount(getActivity())) .getFullUrl(pubMediaUri), mCardMedia, false); } } break; } } @Override public void onLoaderReset(Loader<Cursor> loader) { } @Override public void onMapUpdate(GoogleStaticMapView v, Uri staticMap) { if (BuildConfig.DEBUG) { Log.d(TAG, "scheduling load of " + staticMap); } try { final Drawable d = mImageCache.loadImage(v.getId(), staticMap, v.getMapWidth(), v.getMapHeight()); if (BuildConfig.DEBUG && d != null) { Log.d(TAG, "set map image immediately"); } setMapDrawable(d, false); } catch (final IOException e) { Log.e(TAG, "error updating static map", e); } } private void setMapDrawable(Drawable image, boolean animate) { mStaticMap.setImageDrawable(image); if (animate) { mStaticMap.startAnimation(AnimationUtils.makeInAnimation(getActivity(), true)); } mStaticMap.setVisibility(View.VISIBLE); } @Override public void onImageLoaded(int id, Uri imageUri, Drawable image) { if (id == R.id.static_map) { if (BuildConfig.DEBUG) { Log.d(TAG, "loaded " + imageUri + " (id " + id + ")"); } setMapDrawable(image, true); } } @Override public void onImageLoaded(long id, Uri imageUri, Drawable image) { // XXX } }