1package eu.siacs.conversations.ui;
   2
   3import android.annotation.SuppressLint;
   4import android.annotation.TargetApi;
   5import android.app.ActionBar;
   6import android.app.Activity;
   7import android.app.AlertDialog;
   8import android.app.AlertDialog.Builder;
   9import android.app.PendingIntent;
  10import android.content.ClipData;
  11import android.content.ClipboardManager;
  12import android.content.ComponentName;
  13import android.content.Context;
  14import android.content.DialogInterface;
  15import android.content.DialogInterface.OnClickListener;
  16import android.content.Intent;
  17import android.content.IntentSender.SendIntentException;
  18import android.content.ServiceConnection;
  19import android.content.SharedPreferences;
  20import android.content.pm.PackageManager;
  21import android.content.pm.ResolveInfo;
  22import android.content.res.Resources;
  23import android.graphics.Bitmap;
  24import android.graphics.Color;
  25import android.graphics.Point;
  26import android.graphics.drawable.BitmapDrawable;
  27import android.graphics.drawable.Drawable;
  28import android.net.Uri;
  29import android.nfc.NdefMessage;
  30import android.nfc.NdefRecord;
  31import android.nfc.NfcAdapter;
  32import android.nfc.NfcEvent;
  33import android.os.AsyncTask;
  34import android.os.Build;
  35import android.os.Bundle;
  36import android.os.Handler;
  37import android.os.IBinder;
  38import android.os.SystemClock;
  39import android.preference.PreferenceManager;
  40import android.text.InputType;
  41import android.util.DisplayMetrics;
  42import android.util.Log;
  43import android.view.MenuItem;
  44import android.view.View;
  45import android.view.inputmethod.InputMethodManager;
  46import android.widget.CompoundButton;
  47import android.widget.EditText;
  48import android.widget.ImageView;
  49import android.widget.LinearLayout;
  50import android.widget.TextView;
  51import android.widget.Toast;
  52
  53import com.google.zxing.BarcodeFormat;
  54import com.google.zxing.EncodeHintType;
  55import com.google.zxing.WriterException;
  56import com.google.zxing.common.BitMatrix;
  57import com.google.zxing.qrcode.QRCodeWriter;
  58import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
  59
  60import net.java.otr4j.session.SessionID;
  61
  62import java.io.FileNotFoundException;
  63import java.lang.ref.WeakReference;
  64import java.util.ArrayList;
  65import java.util.Hashtable;
  66import java.util.List;
  67import java.util.concurrent.RejectedExecutionException;
  68
  69import eu.siacs.conversations.Config;
  70import eu.siacs.conversations.R;
  71import eu.siacs.conversations.crypto.axolotl.XmppAxolotlSession;
  72import eu.siacs.conversations.entities.Account;
  73import eu.siacs.conversations.entities.Contact;
  74import eu.siacs.conversations.entities.Conversation;
  75import eu.siacs.conversations.entities.Message;
  76import eu.siacs.conversations.entities.MucOptions;
  77import eu.siacs.conversations.entities.Presences;
  78import eu.siacs.conversations.services.AvatarService;
  79import eu.siacs.conversations.services.XmppConnectionService;
  80import eu.siacs.conversations.services.XmppConnectionService.XmppConnectionBinder;
  81import eu.siacs.conversations.ui.widget.Switch;
  82import eu.siacs.conversations.utils.CryptoHelper;
  83import eu.siacs.conversations.utils.ExceptionHelper;
  84import eu.siacs.conversations.xmpp.OnKeyStatusUpdated;
  85import eu.siacs.conversations.xmpp.OnUpdateBlocklist;
  86import eu.siacs.conversations.xmpp.jid.InvalidJidException;
  87import eu.siacs.conversations.xmpp.jid.Jid;
  88
  89public abstract class XmppActivity extends Activity {
  90
  91	protected static final int REQUEST_ANNOUNCE_PGP = 0x0101;
  92	protected static final int REQUEST_INVITE_TO_CONVERSATION = 0x0102;
  93
  94	public XmppConnectionService xmppConnectionService;
  95	public boolean xmppConnectionServiceBound = false;
  96	protected boolean registeredListeners = false;
  97
  98	protected int mPrimaryTextColor;
  99	protected int mSecondaryTextColor;
 100	protected int mTertiaryTextColor;
 101	protected int mPrimaryBackgroundColor;
 102	protected int mSecondaryBackgroundColor;
 103	protected int mColorRed;
 104	protected int mColorOrange;
 105	protected int mColorGreen;
 106	protected int mPrimaryColor;
 107
 108	protected boolean mUseSubject = true;
 109
 110	private DisplayMetrics metrics;
 111	protected int mTheme;
 112	protected boolean mUsingEnterKey = false;
 113
 114	private long mLastUiRefresh = 0;
 115	private Handler mRefreshUiHandler = new Handler();
 116	private Runnable mRefreshUiRunnable = new Runnable() {
 117		@Override
 118		public void run() {
 119			mLastUiRefresh = SystemClock.elapsedRealtime();
 120			refreshUiReal();
 121		}
 122	};
 123
 124	protected ConferenceInvite mPendingConferenceInvite = null;
 125
 126
 127	protected final void refreshUi() {
 128		final long diff = SystemClock.elapsedRealtime() - mLastUiRefresh;
 129		if (diff > Config.REFRESH_UI_INTERVAL) {
 130			mRefreshUiHandler.removeCallbacks(mRefreshUiRunnable);
 131			runOnUiThread(mRefreshUiRunnable);
 132		} else {
 133			final long next = Config.REFRESH_UI_INTERVAL - diff;
 134			mRefreshUiHandler.removeCallbacks(mRefreshUiRunnable);
 135			mRefreshUiHandler.postDelayed(mRefreshUiRunnable,next);
 136		}
 137	}
 138
 139	abstract protected void refreshUiReal();
 140
 141	protected interface OnValueEdited {
 142		public void onValueEdited(String value);
 143	}
 144
 145	public interface OnPresenceSelected {
 146		public void onPresenceSelected();
 147	}
 148
 149	protected ServiceConnection mConnection = new ServiceConnection() {
 150
 151		@Override
 152		public void onServiceConnected(ComponentName className, IBinder service) {
 153			XmppConnectionBinder binder = (XmppConnectionBinder) service;
 154			xmppConnectionService = binder.getService();
 155			xmppConnectionServiceBound = true;
 156			if (!registeredListeners && shouldRegisterListeners()) {
 157				registerListeners();
 158				registeredListeners = true;
 159			}
 160			onBackendConnected();
 161		}
 162
 163		@Override
 164		public void onServiceDisconnected(ComponentName arg0) {
 165			xmppConnectionServiceBound = false;
 166		}
 167	};
 168
 169	@Override
 170	protected void onStart() {
 171		super.onStart();
 172		if (!xmppConnectionServiceBound) {
 173			connectToBackend();
 174		} else {
 175			if (!registeredListeners) {
 176				this.registerListeners();
 177				this.registeredListeners = true;
 178			}
 179			this.onBackendConnected();
 180		}
 181	}
 182
 183	@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
 184	protected boolean shouldRegisterListeners() {
 185		if  (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
 186			return !isDestroyed() && !isFinishing();
 187		} else {
 188			return !isFinishing();
 189		}
 190	}
 191
 192	public void connectToBackend() {
 193		Intent intent = new Intent(this, XmppConnectionService.class);
 194		intent.setAction("ui");
 195		startService(intent);
 196		bindService(intent, mConnection, Context.BIND_AUTO_CREATE);
 197	}
 198
 199	@Override
 200	protected void onStop() {
 201		super.onStop();
 202		if (xmppConnectionServiceBound) {
 203			if (registeredListeners) {
 204				this.unregisterListeners();
 205				this.registeredListeners = false;
 206			}
 207			unbindService(mConnection);
 208			xmppConnectionServiceBound = false;
 209		}
 210	}
 211
 212	protected void hideKeyboard() {
 213		InputMethodManager inputManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
 214
 215		View focus = getCurrentFocus();
 216
 217		if (focus != null) {
 218
 219			inputManager.hideSoftInputFromWindow(focus.getWindowToken(),
 220					InputMethodManager.HIDE_NOT_ALWAYS);
 221		}
 222	}
 223
 224	public boolean hasPgp() {
 225		return xmppConnectionService.getPgpEngine() != null;
 226	}
 227
 228	public void showInstallPgpDialog() {
 229		Builder builder = new AlertDialog.Builder(this);
 230		builder.setTitle(getString(R.string.openkeychain_required));
 231		builder.setIconAttribute(android.R.attr.alertDialogIcon);
 232		builder.setMessage(getText(R.string.openkeychain_required_long));
 233		builder.setNegativeButton(getString(R.string.cancel), null);
 234		builder.setNeutralButton(getString(R.string.restart),
 235				new OnClickListener() {
 236
 237					@Override
 238					public void onClick(DialogInterface dialog, int which) {
 239						if (xmppConnectionServiceBound) {
 240							unbindService(mConnection);
 241							xmppConnectionServiceBound = false;
 242						}
 243						stopService(new Intent(XmppActivity.this,
 244									XmppConnectionService.class));
 245						finish();
 246					}
 247				});
 248		builder.setPositiveButton(getString(R.string.install),
 249				new OnClickListener() {
 250
 251					@Override
 252					public void onClick(DialogInterface dialog, int which) {
 253						Uri uri = Uri
 254							.parse("market://details?id=org.sufficientlysecure.keychain");
 255						Intent marketIntent = new Intent(Intent.ACTION_VIEW,
 256								uri);
 257						PackageManager manager = getApplicationContext()
 258							.getPackageManager();
 259						List<ResolveInfo> infos = manager
 260							.queryIntentActivities(marketIntent, 0);
 261						if (infos.size() > 0) {
 262							startActivity(marketIntent);
 263						} else {
 264							uri = Uri.parse("http://www.openkeychain.org/");
 265							Intent browserIntent = new Intent(
 266									Intent.ACTION_VIEW, uri);
 267							startActivity(browserIntent);
 268						}
 269						finish();
 270					}
 271				});
 272		builder.create().show();
 273	}
 274
 275	abstract void onBackendConnected();
 276
 277	protected void registerListeners() {
 278		if (this instanceof XmppConnectionService.OnConversationUpdate) {
 279			this.xmppConnectionService.setOnConversationListChangedListener((XmppConnectionService.OnConversationUpdate) this);
 280		}
 281		if (this instanceof XmppConnectionService.OnAccountUpdate) {
 282			this.xmppConnectionService.setOnAccountListChangedListener((XmppConnectionService.OnAccountUpdate) this);
 283		}
 284		if (this instanceof XmppConnectionService.OnRosterUpdate) {
 285			this.xmppConnectionService.setOnRosterUpdateListener((XmppConnectionService.OnRosterUpdate) this);
 286		}
 287		if (this instanceof XmppConnectionService.OnMucRosterUpdate) {
 288			this.xmppConnectionService.setOnMucRosterUpdateListener((XmppConnectionService.OnMucRosterUpdate) this);
 289		}
 290		if (this instanceof OnUpdateBlocklist) {
 291			this.xmppConnectionService.setOnUpdateBlocklistListener((OnUpdateBlocklist) this);
 292		}
 293		if (this instanceof XmppConnectionService.OnShowErrorToast) {
 294			this.xmppConnectionService.setOnShowErrorToastListener((XmppConnectionService.OnShowErrorToast) this);
 295		}
 296		if (this instanceof OnKeyStatusUpdated) {
 297			this.xmppConnectionService.setOnKeyStatusUpdatedListener((OnKeyStatusUpdated) this);
 298		}
 299	}
 300
 301	protected void unregisterListeners() {
 302		if (this instanceof XmppConnectionService.OnConversationUpdate) {
 303			this.xmppConnectionService.removeOnConversationListChangedListener();
 304		}
 305		if (this instanceof XmppConnectionService.OnAccountUpdate) {
 306			this.xmppConnectionService.removeOnAccountListChangedListener();
 307		}
 308		if (this instanceof XmppConnectionService.OnRosterUpdate) {
 309			this.xmppConnectionService.removeOnRosterUpdateListener();
 310		}
 311		if (this instanceof XmppConnectionService.OnMucRosterUpdate) {
 312			this.xmppConnectionService.removeOnMucRosterUpdateListener();
 313		}
 314		if (this instanceof OnUpdateBlocklist) {
 315			this.xmppConnectionService.removeOnUpdateBlocklistListener();
 316		}
 317		if (this instanceof XmppConnectionService.OnShowErrorToast) {
 318			this.xmppConnectionService.removeOnShowErrorToastListener();
 319		}
 320		if (this instanceof OnKeyStatusUpdated) {
 321			this.xmppConnectionService.removeOnNewKeysAvailableListener();
 322		}
 323	}
 324
 325	@Override
 326	public boolean onOptionsItemSelected(final MenuItem item) {
 327		switch (item.getItemId()) {
 328			case R.id.action_settings:
 329				startActivity(new Intent(this, SettingsActivity.class));
 330				break;
 331			case R.id.action_accounts:
 332				startActivity(new Intent(this, ManageAccountActivity.class));
 333				break;
 334			case android.R.id.home:
 335				finish();
 336				break;
 337			case R.id.action_show_qr_code:
 338				showQrCode();
 339				break;
 340		}
 341		return super.onOptionsItemSelected(item);
 342	}
 343
 344	@Override
 345	protected void onCreate(Bundle savedInstanceState) {
 346		super.onCreate(savedInstanceState);
 347		metrics = getResources().getDisplayMetrics();
 348		ExceptionHelper.init(getApplicationContext());
 349		mPrimaryTextColor = getResources().getColor(R.color.black87);
 350		mSecondaryTextColor = getResources().getColor(R.color.black54);
 351		mTertiaryTextColor = getResources().getColor(R.color.black12);
 352		mColorRed = getResources().getColor(R.color.red800);
 353		mColorOrange = getResources().getColor(R.color.orange500);
 354		mColorGreen = getResources().getColor(R.color.green500);
 355		mPrimaryColor = getResources().getColor(R.color.primary);
 356		mPrimaryBackgroundColor = getResources().getColor(R.color.grey50);
 357		mSecondaryBackgroundColor = getResources().getColor(R.color.grey200);
 358		this.mTheme = findTheme();
 359		setTheme(this.mTheme);
 360		this.mUsingEnterKey = usingEnterKey();
 361		mUseSubject = getPreferences().getBoolean("use_subject", true);
 362		final ActionBar ab = getActionBar();
 363		if (ab!=null) {
 364			ab.setDisplayHomeAsUpEnabled(true);
 365		}
 366	}
 367
 368	protected boolean usingEnterKey() {
 369		return getPreferences().getBoolean("display_enter_key", false);
 370	}
 371
 372	protected SharedPreferences getPreferences() {
 373		return PreferenceManager
 374			.getDefaultSharedPreferences(getApplicationContext());
 375	}
 376
 377	public boolean useSubjectToIdentifyConference() {
 378		return mUseSubject;
 379	}
 380
 381	public void switchToConversation(Conversation conversation) {
 382		switchToConversation(conversation, null, false);
 383	}
 384
 385	public void switchToConversation(Conversation conversation, String text,
 386			boolean newTask) {
 387		switchToConversation(conversation,text,null,false,newTask);
 388	}
 389
 390	public void highlightInMuc(Conversation conversation, String nick) {
 391		switchToConversation(conversation, null, nick, false, false);
 392	}
 393
 394	public void privateMsgInMuc(Conversation conversation, String nick) {
 395		switchToConversation(conversation, null, nick, true, false);
 396	}
 397
 398	private void switchToConversation(Conversation conversation, String text, String nick, boolean pm, boolean newTask) {
 399		Intent viewConversationIntent = new Intent(this,
 400				ConversationActivity.class);
 401		viewConversationIntent.setAction(Intent.ACTION_VIEW);
 402		viewConversationIntent.putExtra(ConversationActivity.CONVERSATION,
 403				conversation.getUuid());
 404		if (text != null) {
 405			viewConversationIntent.putExtra(ConversationActivity.TEXT, text);
 406		}
 407		if (nick != null) {
 408			viewConversationIntent.putExtra(ConversationActivity.NICK, nick);
 409			viewConversationIntent.putExtra(ConversationActivity.PRIVATE_MESSAGE,pm);
 410		}
 411		viewConversationIntent.setType(ConversationActivity.VIEW_CONVERSATION);
 412		if (newTask) {
 413			viewConversationIntent.setFlags(viewConversationIntent.getFlags()
 414					| Intent.FLAG_ACTIVITY_NEW_TASK
 415					| Intent.FLAG_ACTIVITY_SINGLE_TOP);
 416		} else {
 417			viewConversationIntent.setFlags(viewConversationIntent.getFlags()
 418					| Intent.FLAG_ACTIVITY_CLEAR_TOP);
 419		}
 420		startActivity(viewConversationIntent);
 421		finish();
 422	}
 423
 424	public void switchToContactDetails(Contact contact) {
 425		switchToContactDetails(contact, null);
 426	}
 427
 428	public void switchToContactDetails(Contact contact, String messageFingerprint) {
 429		Intent intent = new Intent(this, ContactDetailsActivity.class);
 430		intent.setAction(ContactDetailsActivity.ACTION_VIEW_CONTACT);
 431		intent.putExtra("account", contact.getAccount().getJid().toBareJid().toString());
 432		intent.putExtra("contact", contact.getJid().toString());
 433		intent.putExtra("fingerprint", messageFingerprint);
 434		startActivity(intent);
 435	}
 436
 437	public void switchToAccount(Account account) {
 438		Intent intent = new Intent(this, EditAccountActivity.class);
 439		intent.putExtra("jid", account.getJid().toBareJid().toString());
 440		startActivity(intent);
 441	}
 442
 443	protected void inviteToConversation(Conversation conversation) {
 444		Intent intent = new Intent(getApplicationContext(),
 445				ChooseContactActivity.class);
 446		List<String> contacts = new ArrayList<>();
 447		if (conversation.getMode() == Conversation.MODE_MULTI) {
 448			for (MucOptions.User user : conversation.getMucOptions().getUsers()) {
 449				Jid jid = user.getJid();
 450				if (jid != null) {
 451					contacts.add(jid.toBareJid().toString());
 452				}
 453			}
 454		} else {
 455			contacts.add(conversation.getJid().toBareJid().toString());
 456		}
 457		intent.putExtra("filter_contacts", contacts.toArray(new String[contacts.size()]));
 458		intent.putExtra("conversation", conversation.getUuid());
 459		intent.putExtra("multiple", true);
 460		startActivityForResult(intent, REQUEST_INVITE_TO_CONVERSATION);
 461	}
 462
 463	protected void announcePgp(Account account, final Conversation conversation) {
 464		xmppConnectionService.getPgpEngine().generateSignature(account,
 465				"online", new UiCallback<Account>() {
 466
 467					@Override
 468					public void userInputRequried(PendingIntent pi,
 469												  Account account) {
 470						try {
 471							startIntentSenderForResult(pi.getIntentSender(),
 472									REQUEST_ANNOUNCE_PGP, null, 0, 0, 0);
 473						} catch (final SendIntentException ignored) {
 474						}
 475					}
 476
 477					@Override
 478					public void success(Account account) {
 479						xmppConnectionService.databaseBackend.updateAccount(account);
 480						xmppConnectionService.sendPresence(account);
 481						if (conversation != null) {
 482							conversation.setNextEncryption(Message.ENCRYPTION_PGP);
 483							xmppConnectionService.databaseBackend.updateConversation(conversation);
 484						}
 485					}
 486
 487					@Override
 488					public void error(int error, Account account) {
 489						displayErrorDialog(error);
 490					}
 491				});
 492	}
 493
 494	protected void displayErrorDialog(final int errorCode) {
 495		runOnUiThread(new Runnable() {
 496
 497			@Override
 498			public void run() {
 499				AlertDialog.Builder builder = new AlertDialog.Builder(
 500						XmppActivity.this);
 501				builder.setIconAttribute(android.R.attr.alertDialogIcon);
 502				builder.setTitle(getString(R.string.error));
 503				builder.setMessage(errorCode);
 504				builder.setNeutralButton(R.string.accept, null);
 505				builder.create().show();
 506			}
 507		});
 508
 509	}
 510
 511	protected void showAddToRosterDialog(final Conversation conversation) {
 512		showAddToRosterDialog(conversation.getContact());
 513	}
 514
 515	protected void showAddToRosterDialog(final Contact contact) {
 516		AlertDialog.Builder builder = new AlertDialog.Builder(this);
 517		builder.setTitle(contact.getJid().toString());
 518		builder.setMessage(getString(R.string.not_in_roster));
 519		builder.setNegativeButton(getString(R.string.cancel), null);
 520		builder.setPositiveButton(getString(R.string.add_contact),
 521				new DialogInterface.OnClickListener() {
 522
 523					@Override
 524					public void onClick(DialogInterface dialog, int which) {
 525						final Jid jid = contact.getJid();
 526						Account account = contact.getAccount();
 527						Contact contact = account.getRoster().getContact(jid);
 528						xmppConnectionService.createContact(contact);
 529					}
 530				});
 531		builder.create().show();
 532	}
 533
 534	private void showAskForPresenceDialog(final Contact contact) {
 535		AlertDialog.Builder builder = new AlertDialog.Builder(this);
 536		builder.setTitle(contact.getJid().toString());
 537		builder.setMessage(R.string.request_presence_updates);
 538		builder.setNegativeButton(R.string.cancel, null);
 539		builder.setPositiveButton(R.string.request_now,
 540				new DialogInterface.OnClickListener() {
 541
 542					@Override
 543					public void onClick(DialogInterface dialog, int which) {
 544						if (xmppConnectionServiceBound) {
 545							xmppConnectionService.sendPresencePacket(contact
 546									.getAccount(), xmppConnectionService
 547									.getPresenceGenerator()
 548									.requestPresenceUpdatesFrom(contact));
 549						}
 550					}
 551				});
 552		builder.create().show();
 553	}
 554
 555	private void warnMutalPresenceSubscription(final Conversation conversation,
 556			final OnPresenceSelected listener) {
 557		AlertDialog.Builder builder = new AlertDialog.Builder(this);
 558		builder.setTitle(conversation.getContact().getJid().toString());
 559		builder.setMessage(R.string.without_mutual_presence_updates);
 560		builder.setNegativeButton(R.string.cancel, null);
 561		builder.setPositiveButton(R.string.ignore, new OnClickListener() {
 562
 563			@Override
 564			public void onClick(DialogInterface dialog, int which) {
 565				conversation.setNextCounterpart(null);
 566				if (listener != null) {
 567					listener.onPresenceSelected();
 568				}
 569			}
 570		});
 571		builder.create().show();
 572	}
 573
 574	protected void quickEdit(String previousValue, OnValueEdited callback) {
 575		quickEdit(previousValue, callback, false);
 576	}
 577
 578	protected void quickPasswordEdit(String previousValue,
 579			OnValueEdited callback) {
 580		quickEdit(previousValue, callback, true);
 581	}
 582
 583	@SuppressLint("InflateParams")
 584	private void quickEdit(final String previousValue,
 585			final OnValueEdited callback, boolean password) {
 586		AlertDialog.Builder builder = new AlertDialog.Builder(this);
 587		View view = getLayoutInflater().inflate(R.layout.quickedit, null);
 588		final EditText editor = (EditText) view.findViewById(R.id.editor);
 589		OnClickListener mClickListener = new OnClickListener() {
 590
 591			@Override
 592			public void onClick(DialogInterface dialog, int which) {
 593				String value = editor.getText().toString();
 594				if (!previousValue.equals(value) && value.trim().length() > 0) {
 595					callback.onValueEdited(value);
 596				}
 597			}
 598		};
 599		if (password) {
 600			editor.setInputType(InputType.TYPE_CLASS_TEXT
 601					| InputType.TYPE_TEXT_VARIATION_PASSWORD);
 602			editor.setHint(R.string.password);
 603			builder.setPositiveButton(R.string.accept, mClickListener);
 604		} else {
 605			builder.setPositiveButton(R.string.edit, mClickListener);
 606		}
 607		editor.requestFocus();
 608		editor.setText(previousValue);
 609		builder.setView(view);
 610		builder.setNegativeButton(R.string.cancel, null);
 611		builder.create().show();
 612	}
 613
 614	protected boolean addFingerprintRow(LinearLayout keys, final Account account, final String fingerprint, boolean highlight) {
 615		final XmppAxolotlSession.Trust trust = account.getAxolotlService()
 616				.getFingerprintTrust(fingerprint);
 617		return addFingerprintRowWithListeners(keys, account, fingerprint, highlight, trust, true,
 618				new CompoundButton.OnCheckedChangeListener() {
 619					@Override
 620					public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
 621						account.getAxolotlService().setFingerprintTrust(fingerprint,
 622								(isChecked) ? XmppAxolotlSession.Trust.TRUSTED :
 623										XmppAxolotlSession.Trust.UNTRUSTED);
 624					}
 625				},
 626				new View.OnClickListener() {
 627					@Override
 628					public void onClick(View v) {
 629						account.getAxolotlService().setFingerprintTrust(fingerprint,
 630								XmppAxolotlSession.Trust.UNTRUSTED);
 631						v.setEnabled(true);
 632					}
 633				}
 634
 635		);
 636	}
 637
 638	protected boolean addFingerprintRowWithListeners(LinearLayout keys, final Account account,
 639	                                                 final String fingerprint,
 640	                                                 boolean highlight,
 641	                                                 XmppAxolotlSession.Trust trust,
 642	                                                 boolean showTag,
 643	                                                 CompoundButton.OnCheckedChangeListener
 644			                                                 onCheckedChangeListener,
 645	                                                 View.OnClickListener onClickListener) {
 646		if (trust == XmppAxolotlSession.Trust.COMPROMISED) {
 647			return false;
 648		}
 649		View view = getLayoutInflater().inflate(R.layout.contact_key, keys, false);
 650		TextView key = (TextView) view.findViewById(R.id.key);
 651		TextView keyType = (TextView) view.findViewById(R.id.key_type);
 652		Switch trustToggle = (Switch) view.findViewById(R.id.tgl_trust);
 653		trustToggle.setVisibility(View.VISIBLE);
 654		trustToggle.setOnCheckedChangeListener(onCheckedChangeListener);
 655		trustToggle.setOnClickListener(onClickListener);
 656		view.setOnLongClickListener(new View.OnLongClickListener() {
 657			@Override
 658			public boolean onLongClick(View v) {
 659				showPurgeKeyDialog(account, fingerprint);
 660				return true;
 661			}
 662		});
 663
 664		switch (trust) {
 665			case UNTRUSTED:
 666			case TRUSTED:
 667				trustToggle.setChecked(trust == XmppAxolotlSession.Trust.TRUSTED, false);
 668				trustToggle.setEnabled(true);
 669				key.setTextColor(getPrimaryTextColor());
 670				keyType.setTextColor(getSecondaryTextColor());
 671				break;
 672			case UNDECIDED:
 673				trustToggle.setChecked(false, false);
 674				trustToggle.setEnabled(false);
 675				key.setTextColor(getPrimaryTextColor());
 676				keyType.setTextColor(getSecondaryTextColor());
 677				break;
 678			case INACTIVE_UNTRUSTED:
 679			case INACTIVE_UNDECIDED:
 680				trustToggle.setOnClickListener(null);
 681				trustToggle.setChecked(false, false);
 682				trustToggle.setEnabled(false);
 683				key.setTextColor(getTertiaryTextColor());
 684				keyType.setTextColor(getTertiaryTextColor());
 685				break;
 686			case INACTIVE_TRUSTED:
 687				trustToggle.setOnClickListener(null);
 688				trustToggle.setChecked(true, false);
 689				trustToggle.setEnabled(false);
 690				key.setTextColor(getTertiaryTextColor());
 691				keyType.setTextColor(getTertiaryTextColor());
 692				break;
 693		}
 694
 695		if (showTag) {
 696			keyType.setText(getString(R.string.omemo_fingerprint));
 697		} else {
 698			keyType.setVisibility(View.GONE);
 699		}
 700		if (highlight) {
 701			keyType.setTextColor(getResources().getColor(R.color.accent));
 702			keyType.setText(getString(R.string.omemo_fingerprint_selected_message));
 703		} else {
 704			keyType.setText(getString(R.string.omemo_fingerprint));
 705		}
 706
 707		key.setText(CryptoHelper.prettifyFingerprint(fingerprint));
 708		keys.addView(view);
 709		return true;
 710	}
 711
 712	public void showPurgeKeyDialog(final Account account, final String fingerprint) {
 713		Builder builder = new Builder(this);
 714		builder.setTitle(getString(R.string.purge_key));
 715		builder.setIconAttribute(android.R.attr.alertDialogIcon);
 716		builder.setMessage(getString(R.string.purge_key_desc_part1)
 717				+ "\n\n" + CryptoHelper.prettifyFingerprint(fingerprint)
 718				+ "\n\n" + getString(R.string.purge_key_desc_part2));
 719		builder.setNegativeButton(getString(R.string.cancel), null);
 720		builder.setPositiveButton(getString(R.string.accept),
 721				new DialogInterface.OnClickListener() {
 722					@Override
 723					public void onClick(DialogInterface dialog, int which) {
 724						account.getAxolotlService().purgeKey(fingerprint);
 725						refreshUi();
 726					}
 727				});
 728		builder.create().show();
 729	}
 730
 731	public void selectPresence(final Conversation conversation,
 732			final OnPresenceSelected listener) {
 733		final Contact contact = conversation.getContact();
 734		if (conversation.hasValidOtrSession()) {
 735			SessionID id = conversation.getOtrSession().getSessionID();
 736			Jid jid;
 737			try {
 738				jid = Jid.fromString(id.getAccountID() + "/" + id.getUserID());
 739			} catch (InvalidJidException e) {
 740				jid = null;
 741			}
 742			conversation.setNextCounterpart(jid);
 743			listener.onPresenceSelected();
 744		} else 	if (!contact.showInRoster()) {
 745			showAddToRosterDialog(conversation);
 746		} else {
 747			Presences presences = contact.getPresences();
 748			if (presences.size() == 0) {
 749				if (!contact.getOption(Contact.Options.TO)
 750						&& !contact.getOption(Contact.Options.ASKING)
 751						&& contact.getAccount().getStatus() == Account.State.ONLINE) {
 752					showAskForPresenceDialog(contact);
 753				} else if (!contact.getOption(Contact.Options.TO)
 754						|| !contact.getOption(Contact.Options.FROM)) {
 755					warnMutalPresenceSubscription(conversation, listener);
 756				} else {
 757					conversation.setNextCounterpart(null);
 758					listener.onPresenceSelected();
 759				}
 760			} else if (presences.size() == 1) {
 761				String presence = presences.asStringArray()[0];
 762				try {
 763					conversation.setNextCounterpart(Jid.fromParts(contact.getJid().getLocalpart(),contact.getJid().getDomainpart(),presence));
 764				} catch (InvalidJidException e) {
 765					conversation.setNextCounterpart(null);
 766				}
 767				listener.onPresenceSelected();
 768			} else {
 769				final StringBuilder presence = new StringBuilder();
 770				AlertDialog.Builder builder = new AlertDialog.Builder(this);
 771				builder.setTitle(getString(R.string.choose_presence));
 772				final String[] presencesArray = presences.asStringArray();
 773				int preselectedPresence = 0;
 774				for (int i = 0; i < presencesArray.length; ++i) {
 775					if (presencesArray[i].equals(contact.lastseen.presence)) {
 776						preselectedPresence = i;
 777						break;
 778					}
 779				}
 780				presence.append(presencesArray[preselectedPresence]);
 781				builder.setSingleChoiceItems(presencesArray,
 782						preselectedPresence,
 783						new DialogInterface.OnClickListener() {
 784
 785							@Override
 786							public void onClick(DialogInterface dialog,
 787									int which) {
 788								presence.delete(0, presence.length());
 789								presence.append(presencesArray[which]);
 790							}
 791						});
 792				builder.setNegativeButton(R.string.cancel, null);
 793				builder.setPositiveButton(R.string.ok, new OnClickListener() {
 794
 795					@Override
 796					public void onClick(DialogInterface dialog, int which) {
 797						try {
 798							conversation.setNextCounterpart(Jid.fromParts(contact.getJid().getLocalpart(),contact.getJid().getDomainpart(),presence.toString()));
 799						} catch (InvalidJidException e) {
 800							conversation.setNextCounterpart(null);
 801						}
 802						listener.onPresenceSelected();
 803					}
 804				});
 805				builder.create().show();
 806			}
 807		}
 808	}
 809
 810	protected void onActivityResult(int requestCode, int resultCode,
 811			final Intent data) {
 812		super.onActivityResult(requestCode, resultCode, data);
 813		if (requestCode == REQUEST_INVITE_TO_CONVERSATION && resultCode == RESULT_OK) {
 814			mPendingConferenceInvite = ConferenceInvite.parse(data);
 815			if (xmppConnectionServiceBound && mPendingConferenceInvite != null) {
 816				mPendingConferenceInvite.execute(this);
 817				mPendingConferenceInvite = null;
 818			}
 819		}
 820	}
 821
 822	private UiCallback<Conversation> adhocCallback = new UiCallback<Conversation>() {
 823		@Override
 824		public void success(final Conversation conversation) {
 825			switchToConversation(conversation);
 826			runOnUiThread(new Runnable() {
 827				@Override
 828				public void run() {
 829					Toast.makeText(XmppActivity.this,R.string.conference_created,Toast.LENGTH_LONG).show();
 830				}
 831			});
 832		}
 833
 834		@Override
 835		public void error(final int errorCode, Conversation object) {
 836			runOnUiThread(new Runnable() {
 837				@Override
 838				public void run() {
 839					Toast.makeText(XmppActivity.this,errorCode,Toast.LENGTH_LONG).show();
 840				}
 841			});
 842		}
 843
 844		@Override
 845		public void userInputRequried(PendingIntent pi, Conversation object) {
 846
 847		}
 848	};
 849
 850	public int getTertiaryTextColor() {
 851		return this.mTertiaryTextColor;
 852	}
 853
 854	public int getSecondaryTextColor() {
 855		return this.mSecondaryTextColor;
 856	}
 857
 858	public int getPrimaryTextColor() {
 859		return this.mPrimaryTextColor;
 860	}
 861
 862	public int getWarningTextColor() {
 863		return this.mColorRed;
 864	}
 865
 866	public int getOnlineColor() {
 867		return this.mColorGreen;
 868	}
 869
 870	public int getPrimaryBackgroundColor() {
 871		return this.mPrimaryBackgroundColor;
 872	}
 873
 874	public int getSecondaryBackgroundColor() {
 875		return this.mSecondaryBackgroundColor;
 876	}
 877
 878	public int getPixel(int dp) {
 879		DisplayMetrics metrics = getResources().getDisplayMetrics();
 880		return ((int) (dp * metrics.density));
 881	}
 882
 883	public boolean copyTextToClipboard(String text, int labelResId) {
 884		ClipboardManager mClipBoardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
 885		String label = getResources().getString(labelResId);
 886		if (mClipBoardManager != null) {
 887			ClipData mClipData = ClipData.newPlainText(label, text);
 888			mClipBoardManager.setPrimaryClip(mClipData);
 889			return true;
 890		}
 891		return false;
 892	}
 893
 894	protected void registerNdefPushMessageCallback() {
 895		NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(this);
 896		if (nfcAdapter != null && nfcAdapter.isEnabled()) {
 897			nfcAdapter.setNdefPushMessageCallback(new NfcAdapter.CreateNdefMessageCallback() {
 898				@Override
 899				public NdefMessage createNdefMessage(NfcEvent nfcEvent) {
 900					return new NdefMessage(new NdefRecord[]{
 901						NdefRecord.createUri(getShareableUri()),
 902							NdefRecord.createApplicationRecord("eu.siacs.conversations")
 903					});
 904				}
 905			}, this);
 906		}
 907	}
 908
 909	protected void unregisterNdefPushMessageCallback() {
 910		NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(this);
 911		if (nfcAdapter != null && nfcAdapter.isEnabled()) {
 912			nfcAdapter.setNdefPushMessageCallback(null,this);
 913		}
 914	}
 915
 916	protected String getShareableUri() {
 917		return null;
 918	}
 919
 920	@Override
 921	public void onResume() {
 922		super.onResume();
 923		if (this.getShareableUri()!=null) {
 924			this.registerNdefPushMessageCallback();
 925		}
 926	}
 927
 928	protected int findTheme() {
 929		if (getPreferences().getBoolean("use_larger_font", false)) {
 930			return R.style.ConversationsTheme_LargerText;
 931		} else {
 932			return R.style.ConversationsTheme;
 933		}
 934	}
 935
 936	@Override
 937	public void onPause() {
 938		super.onPause();
 939		this.unregisterNdefPushMessageCallback();
 940	}
 941
 942	protected void showQrCode() {
 943		String uri = getShareableUri();
 944		if (uri!=null) {
 945			Point size = new Point();
 946			getWindowManager().getDefaultDisplay().getSize(size);
 947			final int width = (size.x < size.y ? size.x : size.y);
 948			Bitmap bitmap = createQrCodeBitmap(uri, width);
 949			ImageView view = new ImageView(this);
 950			view.setImageBitmap(bitmap);
 951			AlertDialog.Builder builder = new AlertDialog.Builder(this);
 952			builder.setView(view);
 953			builder.create().show();
 954		}
 955	}
 956
 957	protected Bitmap createQrCodeBitmap(String input, int size) {
 958		Log.d(Config.LOGTAG,"qr code requested size: "+size);
 959		try {
 960			final QRCodeWriter QR_CODE_WRITER = new QRCodeWriter();
 961			final Hashtable<EncodeHintType, Object> hints = new Hashtable<>();
 962			hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
 963			final BitMatrix result = QR_CODE_WRITER.encode(input, BarcodeFormat.QR_CODE, size, size, hints);
 964			final int width = result.getWidth();
 965			final int height = result.getHeight();
 966			final int[] pixels = new int[width * height];
 967			for (int y = 0; y < height; y++) {
 968				final int offset = y * width;
 969				for (int x = 0; x < width; x++) {
 970					pixels[offset + x] = result.get(x, y) ? Color.BLACK : Color.TRANSPARENT;
 971				}
 972			}
 973			final Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
 974			Log.d(Config.LOGTAG,"output size: "+width+"x"+height);
 975			bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
 976			return bitmap;
 977		} catch (final WriterException e) {
 978			return null;
 979		}
 980	}
 981
 982	public static class ConferenceInvite {
 983		private String uuid;
 984		private List<Jid> jids = new ArrayList<>();
 985
 986		public static ConferenceInvite parse(Intent data) {
 987			ConferenceInvite invite = new ConferenceInvite();
 988			invite.uuid = data.getStringExtra("conversation");
 989			if (invite.uuid == null) {
 990				return null;
 991			}
 992			try {
 993				if (data.getBooleanExtra("multiple", false)) {
 994					String[] toAdd = data.getStringArrayExtra("contacts");
 995					for (String item : toAdd) {
 996						invite.jids.add(Jid.fromString(item));
 997					}
 998				} else {
 999					invite.jids.add(Jid.fromString(data.getStringExtra("contact")));
1000				}
1001			} catch (final InvalidJidException ignored) {
1002				return null;
1003			}
1004			return invite;
1005		}
1006
1007		public void execute(XmppActivity activity) {
1008			XmppConnectionService service = activity.xmppConnectionService;
1009			Conversation conversation = service.findConversationByUuid(this.uuid);
1010			if (conversation == null) {
1011				return;
1012			}
1013			if (conversation.getMode() == Conversation.MODE_MULTI) {
1014				for (Jid jid : jids) {
1015					service.invite(conversation, jid);
1016				}
1017			} else {
1018				jids.add(conversation.getJid().toBareJid());
1019				service.createAdhocConference(conversation.getAccount(), jids, activity.adhocCallback);
1020			}
1021		}
1022	}
1023
1024	public AvatarService avatarService() {
1025		return xmppConnectionService.getAvatarService();
1026	}
1027
1028	class BitmapWorkerTask extends AsyncTask<Message, Void, Bitmap> {
1029		private final WeakReference<ImageView> imageViewReference;
1030		private Message message = null;
1031
1032		public BitmapWorkerTask(ImageView imageView) {
1033			imageViewReference = new WeakReference<>(imageView);
1034		}
1035
1036		@Override
1037		protected Bitmap doInBackground(Message... params) {
1038			message = params[0];
1039			try {
1040				return xmppConnectionService.getFileBackend().getThumbnail(
1041						message, (int) (metrics.density * 288), false);
1042			} catch (FileNotFoundException e) {
1043				return null;
1044			}
1045		}
1046
1047		@Override
1048		protected void onPostExecute(Bitmap bitmap) {
1049			if (bitmap != null) {
1050				final ImageView imageView = imageViewReference.get();
1051				if (imageView != null) {
1052					imageView.setImageBitmap(bitmap);
1053					imageView.setBackgroundColor(0x00000000);
1054				}
1055			}
1056		}
1057	}
1058
1059	public void loadBitmap(Message message, ImageView imageView) {
1060		Bitmap bm;
1061		try {
1062			bm = xmppConnectionService.getFileBackend().getThumbnail(message,
1063					(int) (metrics.density * 288), true);
1064		} catch (FileNotFoundException e) {
1065			bm = null;
1066		}
1067		if (bm != null) {
1068			imageView.setImageBitmap(bm);
1069			imageView.setBackgroundColor(0x00000000);
1070		} else {
1071			if (cancelPotentialWork(message, imageView)) {
1072				imageView.setBackgroundColor(0xff333333);
1073				final BitmapWorkerTask task = new BitmapWorkerTask(imageView);
1074				final AsyncDrawable asyncDrawable = new AsyncDrawable(
1075						getResources(), null, task);
1076				imageView.setImageDrawable(asyncDrawable);
1077				try {
1078					task.execute(message);
1079				} catch (final RejectedExecutionException ignored) {
1080				}
1081			}
1082		}
1083	}
1084
1085	public static boolean cancelPotentialWork(Message message,
1086			ImageView imageView) {
1087		final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
1088
1089		if (bitmapWorkerTask != null) {
1090			final Message oldMessage = bitmapWorkerTask.message;
1091			if (oldMessage == null || message != oldMessage) {
1092				bitmapWorkerTask.cancel(true);
1093			} else {
1094				return false;
1095			}
1096		}
1097		return true;
1098	}
1099
1100	private static BitmapWorkerTask getBitmapWorkerTask(ImageView imageView) {
1101		if (imageView != null) {
1102			final Drawable drawable = imageView.getDrawable();
1103			if (drawable instanceof AsyncDrawable) {
1104				final AsyncDrawable asyncDrawable = (AsyncDrawable) drawable;
1105				return asyncDrawable.getBitmapWorkerTask();
1106			}
1107		}
1108		return null;
1109	}
1110
1111	static class AsyncDrawable extends BitmapDrawable {
1112		private final WeakReference<BitmapWorkerTask> bitmapWorkerTaskReference;
1113
1114		public AsyncDrawable(Resources res, Bitmap bitmap,
1115				BitmapWorkerTask bitmapWorkerTask) {
1116			super(res, bitmap);
1117			bitmapWorkerTaskReference = new WeakReference<>(
1118					bitmapWorkerTask);
1119		}
1120
1121		public BitmapWorkerTask getBitmapWorkerTask() {
1122			return bitmapWorkerTaskReference.get();
1123		}
1124	}
1125}