Java tutorial
package edu.mit.mobile.android.locast.ver2.casts; /* * Copyright (C) 2011 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; either version 2 * of the License, or (at your option) any later version. * * 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, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ import android.app.AlertDialog; import android.app.Dialog; import android.content.ContentResolver; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.support.v4.widget.SimpleCursorAdapter; import android.support.v4_map.app.LoaderManager; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.CheckBox; import android.widget.Gallery; import android.widget.TextView; import com.google.android.maps.MapController; import com.google.android.maps.MapView; import com.stackoverflow.ArrayUtils; import edu.mit.mobile.android.imagecache.ImageCache; import edu.mit.mobile.android.imagecache.ImageLoaderAdapter; import edu.mit.mobile.android.locast.Constants; import edu.mit.mobile.android.locast.accounts.Authenticator; import edu.mit.mobile.android.locast.accounts.AuthenticatorActivity; import edu.mit.mobile.android.locast.data.Cast; import edu.mit.mobile.android.locast.data.CastMedia; import edu.mit.mobile.android.locast.maps.CastsOverlay; import edu.mit.mobile.android.locast.sync.LocastSyncService; import edu.mit.mobile.android.locast.ver2.R; import edu.mit.mobile.android.locast.ver2.browser.BrowserHome; import edu.mit.mobile.android.locast.ver2.itineraries.LocatableItemOverlay; import edu.mit.mobile.android.locast.widget.FavoriteClickHandler; import edu.mit.mobile.android.widget.ValidatingCheckBox; public class CastDetail extends LocatableDetail implements LoaderManager.LoaderCallbacks<Cursor>, OnItemClickListener, OnClickListener { private static final String TAG = CastDetail.class.getSimpleName(); private LoaderManager mLoaderManager; private CastsOverlay mCastsOverlay; private MapController mMapController; private SimpleCursorAdapter mCastMedia; private ValidatingCheckBox vcb; private static final int LOADER_CAST = 0, LOADER_CAST_MEDIA = 1; private Uri mCastMediaUri; private static final int REQUEST_SIGNIN = 0; private static final String[] CAST_PROJECTION = ArrayUtils.concat( new String[] { Cast._ID, Cast._TITLE, Cast._AUTHOR, Cast._DESCRIPTION, Cast._FAVORITED }, CastsOverlay.CASTS_OVERLAY_PROJECTION); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.cast_detail); initOverlays(); final Uri data = getIntent().getData(); mCastMediaUri = Cast.getCastMediaUri(data); mMapController = ((MapView) findViewById(R.id.map)).getController(); mLoaderManager = getSupportLoaderManager(); mLoaderManager.initLoader(LOADER_CAST, null, this); mLoaderManager.initLoader(LOADER_CAST_MEDIA, null, this); findViewById(R.id.home).setOnClickListener(this); findViewById(R.id.refresh).setOnClickListener(this); vcb = (ValidatingCheckBox) findViewById(R.id.favorite); vcb.setValidatedClickHandler(new MyFavoriteClickHandler(this, data)); final Gallery castMediaView = (Gallery) findViewById(R.id.cast_media); mCastMedia = new CastMediaAdapter(this); castMediaView.setEmptyView(findViewById(android.R.id.empty)); castMediaView.setAdapter(new ImageLoaderAdapter(this, mCastMedia, ImageCache.getInstance(this), new int[] { R.id.media_thumbnail }, 480, 360, ImageLoaderAdapter.UNIT_DIP)); castMediaView.setOnItemClickListener(this); castMediaView.setEnabled(true); final String action = getIntent().getAction(); if (Intent.ACTION_DELETE.equals(action)) { showDialog(DIALOG_CONFIRM_DELETE); } } @Override public void onClick(View v) { switch (v.getId()) { case R.id.home: startActivity(new Intent(this, BrowserHome.class)); break; case R.id.refresh: LocastSyncService.startSync(this, getIntent().getData(), true); break; } } @Override public void onItemClick(AdapterView<?> adapter, View v, int position, long id) { final Cursor c = (Cursor) adapter.getItemAtPosition(position); CastMedia.showMedia(this, c, mCastMediaUri); } @Override public Loader<Cursor> onCreateLoader(int id, Bundle args) { final Uri data = getIntent().getData(); CursorLoader cl = null; switch (id) { case LOADER_CAST: cl = new CursorLoader(this, data, CAST_PROJECTION, null, null, null); break; case LOADER_CAST_MEDIA: cl = new CursorLoader(this, mCastMediaUri, CastMediaAdapter.CAST_MEDIA_PROJECTION, null, null, null); break; } cl.setUpdateThrottle(Constants.UPDATE_THROTTLE); return cl; } @Override public void onLoadFinished(Loader<Cursor> loader, Cursor c) { switch (loader.getId()) { case LOADER_CAST: mCastsOverlay.swapCursor(c); if (c.moveToFirst()) { // MediaProvider.dumpCursorToLog(c, Cast.PROJECTION); ((TextView) findViewById(R.id.title)).setText(c.getString(c.getColumnIndex(Cast._TITLE))); ((TextView) findViewById(R.id.author)).setText(c.getString(c.getColumnIndex(Cast._AUTHOR))); ((TextView) findViewById(R.id.description)) .setText(c.getString(c.getColumnIndex(Cast._DESCRIPTION))); ((CheckBox) findViewById(R.id.favorite)) .setChecked(c.getInt(c.getColumnIndex(Cast._FAVORITED)) != 0); setPointerFromCursor(c); } break; case LOADER_CAST_MEDIA: mCastMedia.swapCursor(c); /* * for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()){ * MediaProvider.dumpCursorToLog(c, CastMedia.PROJECTION); } */ break; } } @Override public void onLoaderReset(Loader<Cursor> loader) { switch (loader.getId()) { case LOADER_CAST: mCastsOverlay.swapCursor(null); break; case LOADER_CAST_MEDIA: mCastMedia.swapCursor(null); break; } } @Override protected LocatableItemOverlay createItemOverlay() { mCastsOverlay = new CastsOverlay(this); return mCastsOverlay; } private class MyFavoriteClickHandler extends FavoriteClickHandler { private boolean shouldActuallyDoIt = true; public MyFavoriteClickHandler(Context context, Uri favoritableItem) { super(context, favoritableItem); } @Override public Boolean performClick(ValidatingCheckBox checkBox) { if (shouldActuallyDoIt) { return super.performClick(checkBox); } else { return null; } } @Override public void prePerformClick(final ValidatingCheckBox checkBox) { if (!Authenticator.hasAccount(CastDetail.this)) { startActivityForResult(new Intent(CastDetail.this, AuthenticatorActivity.class), REQUEST_SIGNIN); shouldActuallyDoIt = false; mDoAfterAuthentication = new Runnable() { @Override public void run() { shouldActuallyDoIt = true; performClick(checkBox); } }; } } } private Runnable mDoAfterAuthentication; @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { switch (requestCode) { case REQUEST_SIGNIN: if (resultCode == RESULT_OK) { runOnUiThread(mDoAfterAuthentication); } mDoAfterAuthentication = null; break; } } private static final int DIALOG_CONFIRM_DELETE = 100; @Override protected Dialog onCreateDialog(int id) { switch (id) { case DIALOG_CONFIRM_DELETE: return new AlertDialog.Builder(this) .setPositiveButton(R.string.dialog_button_delete, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { final Uri cast = getIntent().getData(); final ContentResolver cr = getContentResolver(); cr.delete(Cast.getCastMediaUri(cast), null, null); final int count = cr.delete(cast, null, null); if (Constants.DEBUG) { if (count != 1) { Log.w(TAG, "got non-1 count from delete()"); } } finish(); } }).setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.cancel(); } }).setCancelable(true).setTitle(R.string.cast_delete_title) .setMessage(R.string.cast_delete_message) .create(); default: return super.onCreateDialog(id); } } @Override protected boolean isRouteDisplayed() { // TODO Auto-generated method stub return false; } }