Java tutorial
/* * Copyright (C) 2011 The Stanford MobiSocial Laboratory * * This file is part of Musubi, a mobile social network. * * 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. */ package edu.stanford.mobisocial.dungbeetle.feed.objects; import java.util.Collection; import java.util.Iterator; import java.util.List; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import android.app.PendingIntent; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.content.pm.ActivityInfo; import android.content.pm.PackageManager; import android.content.pm.ResolveInfo; import android.util.Log; import android.widget.Toast; import edu.stanford.mobisocial.dungbeetle.feed.iface.DbEntryHandler; import edu.stanford.mobisocial.dungbeetle.model.Contact; import edu.stanford.mobisocial.dungbeetle.model.PresenceAwareNotify; public class InviteToSharedAppFeedObj extends DbEntryHandler { private static final String TAG = "InviteToSharedAppFeedHandler"; public static final String TYPE = "invite_app_feed"; public static final String ARG = "arg"; public static final String PACKAGE_NAME = "packageName"; public static final String PARTICIPANTS = "participants"; public static final String FEED_NAME = "feedName"; @Override public String getType() { return TYPE; } public static JSONObject json(Collection<Contact> contacts, String feedName, String packageName) { JSONObject obj = new JSONObject(); try { obj.put("packageName", packageName); obj.put("sharedFeedName", feedName); JSONArray participants = new JSONArray(); Iterator<Contact> it = contacts.iterator(); while (it.hasNext()) { String localId = "@l" + it.next().id; participants.put(participants.length(), localId); } // Need to add ourself to participants participants.put(participants.length(), "@l" + Contact.MY_ID); obj.put("participants", participants); } catch (JSONException e) { } return obj; } public void handleDirectMessage(Context context, Contact from, JSONObject obj) { try { String packageName = obj.getString(PACKAGE_NAME); String feedName = obj.getString("sharedFeedName"); JSONArray ids = obj.getJSONArray(PARTICIPANTS); Intent launch = new Intent(); launch.setAction(Intent.ACTION_MAIN); launch.addCategory(Intent.CATEGORY_LAUNCHER); launch.putExtra("type", "invite_app_feed"); launch.putExtra("creator", false); launch.putExtra("sender", from.id); launch.putExtra("sharedFeedName", feedName); launch.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); long[] idArray = new long[ids.length()]; for (int i = 0; i < ids.length(); i++) { idArray[i] = ids.getLong(i); } launch.putExtra("participants", idArray); launch.setPackage(packageName); final PackageManager mgr = context.getPackageManager(); List<ResolveInfo> resolved = mgr.queryIntentActivities(launch, 0); if (resolved.size() == 0) { Toast.makeText(context, "Could not find application to handle invite.", Toast.LENGTH_SHORT).show(); return; } ActivityInfo info = resolved.get(0).activityInfo; launch.setComponent(new ComponentName(info.packageName, info.name)); PendingIntent contentIntent = PendingIntent.getActivity(context, 0, launch, PendingIntent.FLAG_CANCEL_CURRENT); (new PresenceAwareNotify(context)).notify("New Invitation from " + from.name, "Invitation received from " + from.name, "Click to launch application: " + packageName, contentIntent); } catch (JSONException e) { Log.e(TAG, e.getMessage()); } } }