1package eu.siacs.conversations.ui;
   2
   3import android.Manifest;
   4import android.annotation.SuppressLint;
   5import android.annotation.TargetApi;
   6import android.app.ActionBar;
   7import android.app.Activity;
   8import android.app.AlertDialog;
   9import android.app.AlertDialog.Builder;
  10import android.app.PendingIntent;
  11import android.content.ActivityNotFoundException;
  12import android.content.ClipData;
  13import android.content.ClipboardManager;
  14import android.content.ComponentName;
  15import android.content.Context;
  16import android.content.DialogInterface;
  17import android.content.DialogInterface.OnClickListener;
  18import android.content.Intent;
  19import android.content.IntentSender.SendIntentException;
  20import android.content.ServiceConnection;
  21import android.content.SharedPreferences;
  22import android.content.pm.PackageManager;
  23import android.content.pm.ResolveInfo;
  24import android.content.res.Resources;
  25import android.content.res.TypedArray;
  26import android.graphics.Bitmap;
  27import android.graphics.Color;
  28import android.graphics.Point;
  29import android.graphics.drawable.BitmapDrawable;
  30import android.graphics.drawable.Drawable;
  31import android.net.ConnectivityManager;
  32import android.net.Uri;
  33import android.nfc.NdefMessage;
  34import android.nfc.NdefRecord;
  35import android.nfc.NfcAdapter;
  36import android.nfc.NfcEvent;
  37import android.os.AsyncTask;
  38import android.os.Build;
  39import android.os.Bundle;
  40import android.os.Handler;
  41import android.os.IBinder;
  42import android.os.PowerManager;
  43import android.os.SystemClock;
  44import android.preference.PreferenceManager;
  45import android.text.InputType;
  46import android.util.DisplayMetrics;
  47import android.util.Log;
  48import android.util.Pair;
  49import android.view.MenuItem;
  50import android.view.View;
  51import android.view.inputmethod.InputMethodManager;
  52import android.widget.EditText;
  53import android.widget.ImageView;
  54import android.widget.Toast;
  55
  56import com.google.zxing.BarcodeFormat;
  57import com.google.zxing.EncodeHintType;
  58import com.google.zxing.WriterException;
  59import com.google.zxing.common.BitMatrix;
  60import com.google.zxing.qrcode.QRCodeWriter;
  61import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
  62
  63import net.java.otr4j.session.SessionID;
  64
  65import java.io.FileNotFoundException;
  66import java.lang.ref.WeakReference;
  67import java.util.ArrayList;
  68import java.util.Collections;
  69import java.util.Hashtable;
  70import java.util.List;
  71import java.util.Map;
  72import java.util.concurrent.RejectedExecutionException;
  73import java.util.concurrent.atomic.AtomicInteger;
  74
  75import eu.siacs.conversations.Config;
  76import eu.siacs.conversations.R;
  77import eu.siacs.conversations.entities.Account;
  78import eu.siacs.conversations.entities.Contact;
  79import eu.siacs.conversations.entities.Conversation;
  80import eu.siacs.conversations.entities.Message;
  81import eu.siacs.conversations.entities.MucOptions;
  82import eu.siacs.conversations.entities.Presences;
  83import eu.siacs.conversations.services.AvatarService;
  84import eu.siacs.conversations.services.XmppConnectionService;
  85import eu.siacs.conversations.services.XmppConnectionService.XmppConnectionBinder;
  86import eu.siacs.conversations.utils.CryptoHelper;
  87import eu.siacs.conversations.utils.ExceptionHelper;
  88import eu.siacs.conversations.utils.UIHelper;
  89import eu.siacs.conversations.xmpp.OnKeyStatusUpdated;
  90import eu.siacs.conversations.xmpp.OnUpdateBlocklist;
  91import eu.siacs.conversations.xmpp.jid.InvalidJidException;
  92import eu.siacs.conversations.xmpp.jid.Jid;
  93
  94public abstract class XmppActivity extends Activity {
  95
  96	protected static final int REQUEST_ANNOUNCE_PGP = 0x0101;
  97	protected static final int REQUEST_INVITE_TO_CONVERSATION = 0x0102;
  98	protected static final int REQUEST_CHOOSE_PGP_ID = 0x0103;
  99	protected static final int REQUEST_BATTERY_OP = 0x13849ff;
 100
 101	public static final String EXTRA_ACCOUNT = "account";
 102
 103	public XmppConnectionService xmppConnectionService;
 104	public boolean xmppConnectionServiceBound = false;
 105	protected boolean registeredListeners = false;
 106
 107	protected int mPrimaryTextColor;
 108	protected int mSecondaryTextColor;
 109	protected int mTertiaryTextColor;
 110	protected int mPrimaryBackgroundColor;
 111	protected int mSecondaryBackgroundColor;
 112	protected int mColorRed;
 113	protected int mColorOrange;
 114	protected int mColorGreen;
 115	protected int mPrimaryColor;
 116
 117	protected boolean mUseSubject = true;
 118
 119	private DisplayMetrics metrics;
 120	protected int mTheme;
 121	protected boolean mUsingEnterKey = false;
 122
 123	protected Toast mToast;
 124
 125	protected void hideToast() {
 126		if (mToast != null) {
 127			mToast.cancel();
 128		}
 129	}
 130
 131	protected void replaceToast(String msg) {
 132		replaceToast(msg, true);
 133	}
 134
 135	protected void replaceToast(String msg, boolean showlong) {
 136		hideToast();
 137		mToast = Toast.makeText(this, msg ,showlong ? Toast.LENGTH_LONG : Toast.LENGTH_SHORT);
 138		mToast.show();
 139	}
 140
 141	protected Runnable onOpenPGPKeyPublished = new Runnable() {
 142		@Override
 143		public void run() {
 144			Toast.makeText(XmppActivity.this,R.string.openpgp_has_been_published, Toast.LENGTH_SHORT).show();
 145		}
 146	};
 147
 148	private long mLastUiRefresh = 0;
 149	private Handler mRefreshUiHandler = new Handler();
 150	private Runnable mRefreshUiRunnable = new Runnable() {
 151		@Override
 152		public void run() {
 153			mLastUiRefresh = SystemClock.elapsedRealtime();
 154			refreshUiReal();
 155		}
 156	};
 157
 158	protected ConferenceInvite mPendingConferenceInvite = null;
 159
 160
 161	protected final void refreshUi() {
 162		final long diff = SystemClock.elapsedRealtime() - mLastUiRefresh;
 163		if (diff > Config.REFRESH_UI_INTERVAL) {
 164			mRefreshUiHandler.removeCallbacks(mRefreshUiRunnable);
 165			runOnUiThread(mRefreshUiRunnable);
 166		} else {
 167			final long next = Config.REFRESH_UI_INTERVAL - diff;
 168			mRefreshUiHandler.removeCallbacks(mRefreshUiRunnable);
 169			mRefreshUiHandler.postDelayed(mRefreshUiRunnable,next);
 170		}
 171	}
 172
 173	abstract protected void refreshUiReal();
 174
 175	protected interface OnValueEdited {
 176		public void onValueEdited(String value);
 177	}
 178
 179	public interface OnPresenceSelected {
 180		public void onPresenceSelected();
 181	}
 182
 183	protected ServiceConnection mConnection = new ServiceConnection() {
 184
 185		@Override
 186		public void onServiceConnected(ComponentName className, IBinder service) {
 187			XmppConnectionBinder binder = (XmppConnectionBinder) service;
 188			xmppConnectionService = binder.getService();
 189			xmppConnectionServiceBound = true;
 190			if (!registeredListeners && shouldRegisterListeners()) {
 191				registerListeners();
 192				registeredListeners = true;
 193			}
 194			onBackendConnected();
 195		}
 196
 197		@Override
 198		public void onServiceDisconnected(ComponentName arg0) {
 199			xmppConnectionServiceBound = false;
 200		}
 201	};
 202
 203	@Override
 204	protected void onStart() {
 205		super.onStart();
 206		if (!xmppConnectionServiceBound) {
 207			connectToBackend();
 208		} else {
 209			if (!registeredListeners) {
 210				this.registerListeners();
 211				this.registeredListeners = true;
 212			}
 213			this.onBackendConnected();
 214		}
 215	}
 216
 217	@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
 218	protected boolean shouldRegisterListeners() {
 219		if  (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
 220			return !isDestroyed() && !isFinishing();
 221		} else {
 222			return !isFinishing();
 223		}
 224	}
 225
 226	public void connectToBackend() {
 227		Intent intent = new Intent(this, XmppConnectionService.class);
 228		intent.setAction("ui");
 229		startService(intent);
 230		bindService(intent, mConnection, Context.BIND_AUTO_CREATE);
 231	}
 232
 233	@Override
 234	protected void onStop() {
 235		super.onStop();
 236		if (xmppConnectionServiceBound) {
 237			if (registeredListeners) {
 238				this.unregisterListeners();
 239				this.registeredListeners = false;
 240			}
 241			unbindService(mConnection);
 242			xmppConnectionServiceBound = false;
 243		}
 244	}
 245
 246	protected void hideKeyboard() {
 247		InputMethodManager inputManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
 248
 249		View focus = getCurrentFocus();
 250
 251		if (focus != null) {
 252
 253			inputManager.hideSoftInputFromWindow(focus.getWindowToken(),
 254					InputMethodManager.HIDE_NOT_ALWAYS);
 255		}
 256	}
 257
 258	public boolean hasPgp() {
 259		return xmppConnectionService.getPgpEngine() != null;
 260	}
 261
 262	public void showInstallPgpDialog() {
 263		Builder builder = new AlertDialog.Builder(this);
 264		builder.setTitle(getString(R.string.openkeychain_required));
 265		builder.setIconAttribute(android.R.attr.alertDialogIcon);
 266		builder.setMessage(getText(R.string.openkeychain_required_long));
 267		builder.setNegativeButton(getString(R.string.cancel), null);
 268		builder.setNeutralButton(getString(R.string.restart),
 269				new OnClickListener() {
 270
 271					@Override
 272					public void onClick(DialogInterface dialog, int which) {
 273						if (xmppConnectionServiceBound) {
 274							unbindService(mConnection);
 275							xmppConnectionServiceBound = false;
 276						}
 277						stopService(new Intent(XmppActivity.this,
 278									XmppConnectionService.class));
 279						finish();
 280					}
 281				});
 282		builder.setPositiveButton(getString(R.string.install),
 283				new OnClickListener() {
 284
 285					@Override
 286					public void onClick(DialogInterface dialog, int which) {
 287						Uri uri = Uri
 288							.parse("market://details?id=org.sufficientlysecure.keychain");
 289						Intent marketIntent = new Intent(Intent.ACTION_VIEW,
 290								uri);
 291						PackageManager manager = getApplicationContext()
 292							.getPackageManager();
 293						List<ResolveInfo> infos = manager
 294							.queryIntentActivities(marketIntent, 0);
 295						if (infos.size() > 0) {
 296							startActivity(marketIntent);
 297						} else {
 298							uri = Uri.parse("http://www.openkeychain.org/");
 299							Intent browserIntent = new Intent(
 300									Intent.ACTION_VIEW, uri);
 301							startActivity(browserIntent);
 302						}
 303						finish();
 304					}
 305				});
 306		builder.create().show();
 307	}
 308
 309	abstract void onBackendConnected();
 310
 311	protected void registerListeners() {
 312		if (this instanceof XmppConnectionService.OnConversationUpdate) {
 313			this.xmppConnectionService.setOnConversationListChangedListener((XmppConnectionService.OnConversationUpdate) this);
 314		}
 315		if (this instanceof XmppConnectionService.OnAccountUpdate) {
 316			this.xmppConnectionService.setOnAccountListChangedListener((XmppConnectionService.OnAccountUpdate) this);
 317		}
 318		if (this instanceof XmppConnectionService.OnCaptchaRequested) {
 319			this.xmppConnectionService.setOnCaptchaRequestedListener((XmppConnectionService.OnCaptchaRequested) this);
 320		}
 321		if (this instanceof XmppConnectionService.OnRosterUpdate) {
 322			this.xmppConnectionService.setOnRosterUpdateListener((XmppConnectionService.OnRosterUpdate) this);
 323		}
 324		if (this instanceof XmppConnectionService.OnMucRosterUpdate) {
 325			this.xmppConnectionService.setOnMucRosterUpdateListener((XmppConnectionService.OnMucRosterUpdate) this);
 326		}
 327		if (this instanceof OnUpdateBlocklist) {
 328			this.xmppConnectionService.setOnUpdateBlocklistListener((OnUpdateBlocklist) this);
 329		}
 330		if (this instanceof XmppConnectionService.OnShowErrorToast) {
 331			this.xmppConnectionService.setOnShowErrorToastListener((XmppConnectionService.OnShowErrorToast) this);
 332		}
 333		if (this instanceof OnKeyStatusUpdated) {
 334			this.xmppConnectionService.setOnKeyStatusUpdatedListener((OnKeyStatusUpdated) this);
 335		}
 336	}
 337
 338	protected void unregisterListeners() {
 339		if (this instanceof XmppConnectionService.OnConversationUpdate) {
 340			this.xmppConnectionService.removeOnConversationListChangedListener();
 341		}
 342		if (this instanceof XmppConnectionService.OnAccountUpdate) {
 343			this.xmppConnectionService.removeOnAccountListChangedListener();
 344		}
 345		if (this instanceof XmppConnectionService.OnCaptchaRequested) {
 346			this.xmppConnectionService.removeOnCaptchaRequestedListener();
 347		}
 348		if (this instanceof XmppConnectionService.OnRosterUpdate) {
 349			this.xmppConnectionService.removeOnRosterUpdateListener();
 350		}
 351		if (this instanceof XmppConnectionService.OnMucRosterUpdate) {
 352			this.xmppConnectionService.removeOnMucRosterUpdateListener();
 353		}
 354		if (this instanceof OnUpdateBlocklist) {
 355			this.xmppConnectionService.removeOnUpdateBlocklistListener();
 356		}
 357		if (this instanceof XmppConnectionService.OnShowErrorToast) {
 358			this.xmppConnectionService.removeOnShowErrorToastListener();
 359		}
 360		if (this instanceof OnKeyStatusUpdated) {
 361			this.xmppConnectionService.removeOnNewKeysAvailableListener();
 362		}
 363	}
 364
 365	@Override
 366	public boolean onOptionsItemSelected(final MenuItem item) {
 367		switch (item.getItemId()) {
 368			case R.id.action_settings:
 369				startActivity(new Intent(this, SettingsActivity.class));
 370				break;
 371			case R.id.action_accounts:
 372				startActivity(new Intent(this, ManageAccountActivity.class));
 373				break;
 374			case android.R.id.home:
 375				finish();
 376				break;
 377			case R.id.action_show_qr_code:
 378				showQrCode();
 379				break;
 380		}
 381		return super.onOptionsItemSelected(item);
 382	}
 383
 384	@Override
 385	protected void onCreate(Bundle savedInstanceState) {
 386		super.onCreate(savedInstanceState);
 387		metrics = getResources().getDisplayMetrics();
 388		ExceptionHelper.init(getApplicationContext());
 389
 390		mPrimaryTextColor = getResources().getColor(R.color.black87);
 391		mSecondaryTextColor = getResources().getColor(R.color.black54);
 392		mTertiaryTextColor = getResources().getColor(R.color.black12);
 393		mColorRed = getResources().getColor(R.color.red800);
 394		mColorOrange = getResources().getColor(R.color.orange500);
 395		mColorGreen = getResources().getColor(R.color.green500);
 396		mPrimaryColor = getResources().getColor(R.color.primary500);
 397		mPrimaryBackgroundColor = getResources().getColor(R.color.grey50);
 398		mSecondaryBackgroundColor = getResources().getColor(R.color.grey200);
 399
 400		if(isDarkTheme()) {
 401			mPrimaryTextColor = getResources().getColor(R.color.white);
 402			mSecondaryTextColor = getResources().getColor(R.color.white70);
 403			mTertiaryTextColor = getResources().getColor(R.color.white12);
 404			mPrimaryBackgroundColor = getResources().getColor(R.color.grey800);
 405			mSecondaryBackgroundColor = getResources().getColor(R.color.grey900);
 406		}
 407
 408		this.mTheme = findTheme();
 409		setTheme(this.mTheme);
 410
 411		this.mUsingEnterKey = usingEnterKey();
 412		mUseSubject = getPreferences().getBoolean("use_subject", true);
 413		final ActionBar ab = getActionBar();
 414		if (ab!=null) {
 415			ab.setDisplayHomeAsUpEnabled(true);
 416		}
 417	}
 418
 419	public boolean isDarkTheme() {
 420		return getPreferences().getString("theme", "light").equals("dark");
 421	}
 422
 423	public int getThemeResource(int r_attr_name, int r_drawable_def) {
 424		int[] attrs = {	r_attr_name };
 425		TypedArray ta = this.getTheme().obtainStyledAttributes(attrs);
 426
 427		int res = ta.getResourceId(0, r_drawable_def);
 428		ta.recycle();
 429
 430		return res;
 431	}
 432
 433	protected boolean isOptimizingBattery() {
 434		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
 435			PowerManager pm = (PowerManager) getSystemService(POWER_SERVICE);
 436			return !pm.isIgnoringBatteryOptimizations(getPackageName());
 437		} else {
 438			return false;
 439		}
 440	}
 441
 442	protected boolean isAffectedByDataSaver() {
 443		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
 444			ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
 445			return cm.isActiveNetworkMetered()
 446					&& cm.getRestrictBackgroundStatus() == ConnectivityManager.RESTRICT_BACKGROUND_STATUS_ENABLED;
 447		} else {
 448			return false;
 449		}
 450	}
 451
 452	protected boolean usingEnterKey() {
 453		return getPreferences().getBoolean("display_enter_key", false);
 454	}
 455
 456	protected SharedPreferences getPreferences() {
 457		return PreferenceManager
 458			.getDefaultSharedPreferences(getApplicationContext());
 459	}
 460
 461	public boolean useSubjectToIdentifyConference() {
 462		return mUseSubject;
 463	}
 464
 465	public void switchToConversation(Conversation conversation) {
 466		switchToConversation(conversation, null, false);
 467	}
 468
 469	public void switchToConversation(Conversation conversation, String text,
 470			boolean newTask) {
 471		switchToConversation(conversation,text,null,false,newTask);
 472	}
 473
 474	public void highlightInMuc(Conversation conversation, String nick) {
 475		switchToConversation(conversation, null, nick, false, false);
 476	}
 477
 478	public void privateMsgInMuc(Conversation conversation, String nick) {
 479		switchToConversation(conversation, null, nick, true, false);
 480	}
 481
 482	private void switchToConversation(Conversation conversation, String text, String nick, boolean pm, boolean newTask) {
 483		Intent viewConversationIntent = new Intent(this,
 484				ConversationActivity.class);
 485		viewConversationIntent.setAction(ConversationActivity.ACTION_VIEW_CONVERSATION);
 486		viewConversationIntent.putExtra(ConversationActivity.CONVERSATION,
 487				conversation.getUuid());
 488		if (text != null) {
 489			viewConversationIntent.putExtra(ConversationActivity.TEXT, text);
 490		}
 491		if (nick != null) {
 492			viewConversationIntent.putExtra(ConversationActivity.NICK, nick);
 493			viewConversationIntent.putExtra(ConversationActivity.PRIVATE_MESSAGE,pm);
 494		}
 495		if (newTask) {
 496			viewConversationIntent.setFlags(viewConversationIntent.getFlags()
 497					| Intent.FLAG_ACTIVITY_NEW_TASK
 498					| Intent.FLAG_ACTIVITY_SINGLE_TOP);
 499		} else {
 500			viewConversationIntent.setFlags(viewConversationIntent.getFlags()
 501					| Intent.FLAG_ACTIVITY_CLEAR_TOP);
 502		}
 503		startActivity(viewConversationIntent);
 504		finish();
 505	}
 506
 507	public void switchToContactDetails(Contact contact) {
 508		switchToContactDetails(contact, null);
 509	}
 510
 511	public void switchToContactDetails(Contact contact, String messageFingerprint) {
 512		Intent intent = new Intent(this, ContactDetailsActivity.class);
 513		intent.setAction(ContactDetailsActivity.ACTION_VIEW_CONTACT);
 514		intent.putExtra(EXTRA_ACCOUNT, contact.getAccount().getJid().toBareJid().toString());
 515		intent.putExtra("contact", contact.getJid().toString());
 516		intent.putExtra("fingerprint", messageFingerprint);
 517		startActivity(intent);
 518	}
 519
 520	public void switchToAccount(Account account) {
 521		switchToAccount(account, false);
 522	}
 523
 524	public void switchToAccount(Account account, boolean init) {
 525		Intent intent = new Intent(this, EditAccountActivity.class);
 526		intent.putExtra("jid", account.getJid().toBareJid().toString());
 527		intent.putExtra("init", init);
 528		startActivity(intent);
 529	}
 530
 531	protected void inviteToConversation(Conversation conversation) {
 532		Intent intent = new Intent(getApplicationContext(),
 533				ChooseContactActivity.class);
 534		List<String> contacts = new ArrayList<>();
 535		if (conversation.getMode() == Conversation.MODE_MULTI) {
 536			for (MucOptions.User user : conversation.getMucOptions().getUsers(false)) {
 537				Jid jid = user.getRealJid();
 538				if (jid != null) {
 539					contacts.add(jid.toBareJid().toString());
 540				}
 541			}
 542		} else {
 543			contacts.add(conversation.getJid().toBareJid().toString());
 544		}
 545		intent.putExtra("filter_contacts", contacts.toArray(new String[contacts.size()]));
 546		intent.putExtra("conversation", conversation.getUuid());
 547		intent.putExtra("multiple", true);
 548		intent.putExtra("show_enter_jid", true);
 549		intent.putExtra(EXTRA_ACCOUNT, conversation.getAccount().getJid().toBareJid().toString());
 550		startActivityForResult(intent, REQUEST_INVITE_TO_CONVERSATION);
 551	}
 552
 553	protected void announcePgp(Account account, final Conversation conversation, final Runnable onSuccess) {
 554		if (account.getPgpId() == 0) {
 555			choosePgpSignId(account);
 556		} else {
 557			String status = null;
 558			if (manuallyChangePresence()) {
 559				status = account.getPresenceStatusMessage();
 560			}
 561			if (status == null) {
 562				status = "";
 563			}
 564			xmppConnectionService.getPgpEngine().generateSignature(account, status, new UiCallback<Account>() {
 565
 566				@Override
 567				public void userInputRequried(PendingIntent pi, Account account) {
 568					try {
 569						startIntentSenderForResult(pi.getIntentSender(), REQUEST_ANNOUNCE_PGP, null, 0, 0, 0);
 570					} catch (final SendIntentException ignored) {
 571					}
 572				}
 573
 574				@Override
 575				public void success(Account account) {
 576					xmppConnectionService.databaseBackend.updateAccount(account);
 577					xmppConnectionService.sendPresence(account);
 578					if (conversation != null) {
 579						conversation.setNextEncryption(Message.ENCRYPTION_PGP);
 580						xmppConnectionService.updateConversation(conversation);
 581						refreshUi();
 582					}
 583					if (onSuccess != null) {
 584						runOnUiThread(onSuccess);
 585					}
 586				}
 587
 588				@Override
 589				public void error(int error, Account account) {
 590					if (error == 0 && account != null) {
 591						account.setPgpSignId(0);
 592						account.unsetPgpSignature();
 593						xmppConnectionService.databaseBackend.updateAccount(account);
 594						choosePgpSignId(account);
 595					} else {
 596						displayErrorDialog(error);
 597					}
 598				}
 599			});
 600		}
 601	}
 602
 603	protected  boolean noAccountUsesPgp() {
 604		if (!hasPgp()) {
 605			return true;
 606		}
 607		for(Account account : xmppConnectionService.getAccounts()) {
 608			if (account.getPgpId() != 0) {
 609				return false;
 610			}
 611		}
 612		return true;
 613	}
 614
 615	@SuppressWarnings("deprecation")
 616	@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
 617	protected void setListItemBackgroundOnView(View view) {
 618		int sdk = android.os.Build.VERSION.SDK_INT;
 619		if (sdk < android.os.Build.VERSION_CODES.JELLY_BEAN) {
 620			view.setBackgroundDrawable(getResources().getDrawable(R.drawable.greybackground));
 621		} else {
 622			view.setBackground(getResources().getDrawable(R.drawable.greybackground));
 623		}
 624	}
 625
 626	protected void choosePgpSignId(Account account) {
 627		xmppConnectionService.getPgpEngine().chooseKey(account, new UiCallback<Account>() {
 628			@Override
 629			public void success(Account account1) {
 630			}
 631
 632			@Override
 633			public void error(int errorCode, Account object) {
 634
 635			}
 636
 637			@Override
 638			public void userInputRequried(PendingIntent pi, Account object) {
 639				try {
 640					startIntentSenderForResult(pi.getIntentSender(),
 641							REQUEST_CHOOSE_PGP_ID, null, 0, 0, 0);
 642				} catch (final SendIntentException ignored) {
 643				}
 644			}
 645		});
 646	}
 647
 648	protected void displayErrorDialog(final int errorCode) {
 649		runOnUiThread(new Runnable() {
 650
 651			@Override
 652			public void run() {
 653				AlertDialog.Builder builder = new AlertDialog.Builder(
 654						XmppActivity.this);
 655				builder.setIconAttribute(android.R.attr.alertDialogIcon);
 656				builder.setTitle(getString(R.string.error));
 657				builder.setMessage(errorCode);
 658				builder.setNeutralButton(R.string.accept, null);
 659				builder.create().show();
 660			}
 661		});
 662
 663	}
 664
 665	protected void showAddToRosterDialog(final Conversation conversation) {
 666		showAddToRosterDialog(conversation.getContact());
 667	}
 668
 669	protected void showAddToRosterDialog(final Contact contact) {
 670		AlertDialog.Builder builder = new AlertDialog.Builder(this);
 671		builder.setTitle(contact.getJid().toString());
 672		builder.setMessage(getString(R.string.not_in_roster));
 673		builder.setNegativeButton(getString(R.string.cancel), null);
 674		builder.setPositiveButton(getString(R.string.add_contact),
 675				new DialogInterface.OnClickListener() {
 676
 677					@Override
 678					public void onClick(DialogInterface dialog, int which) {
 679						final Jid jid = contact.getJid();
 680						Account account = contact.getAccount();
 681						Contact contact = account.getRoster().getContact(jid);
 682						xmppConnectionService.createContact(contact);
 683					}
 684				});
 685		builder.create().show();
 686	}
 687
 688	private void showAskForPresenceDialog(final Contact contact) {
 689		AlertDialog.Builder builder = new AlertDialog.Builder(this);
 690		builder.setTitle(contact.getJid().toString());
 691		builder.setMessage(R.string.request_presence_updates);
 692		builder.setNegativeButton(R.string.cancel, null);
 693		builder.setPositiveButton(R.string.request_now,
 694				new DialogInterface.OnClickListener() {
 695
 696					@Override
 697					public void onClick(DialogInterface dialog, int which) {
 698						if (xmppConnectionServiceBound) {
 699							xmppConnectionService.sendPresencePacket(contact
 700									.getAccount(), xmppConnectionService
 701									.getPresenceGenerator()
 702									.requestPresenceUpdatesFrom(contact));
 703						}
 704					}
 705				});
 706		builder.create().show();
 707	}
 708
 709	private void warnMutalPresenceSubscription(final Conversation conversation,
 710			final OnPresenceSelected listener) {
 711		AlertDialog.Builder builder = new AlertDialog.Builder(this);
 712		builder.setTitle(conversation.getContact().getJid().toString());
 713		builder.setMessage(R.string.without_mutual_presence_updates);
 714		builder.setNegativeButton(R.string.cancel, null);
 715		builder.setPositiveButton(R.string.ignore, new OnClickListener() {
 716
 717			@Override
 718			public void onClick(DialogInterface dialog, int which) {
 719				conversation.setNextCounterpart(null);
 720				if (listener != null) {
 721					listener.onPresenceSelected();
 722				}
 723			}
 724		});
 725		builder.create().show();
 726	}
 727
 728	protected void quickEdit(String previousValue, int hint, OnValueEdited callback) {
 729		quickEdit(previousValue, callback, hint, false);
 730	}
 731
 732	protected void quickPasswordEdit(String previousValue, OnValueEdited callback) {
 733		quickEdit(previousValue, callback, R.string.password, true);
 734	}
 735
 736	@SuppressLint("InflateParams")
 737	private void quickEdit(final String previousValue,
 738						   final OnValueEdited callback,
 739						   final int hint,
 740						   boolean password) {
 741		AlertDialog.Builder builder = new AlertDialog.Builder(this);
 742		View view = getLayoutInflater().inflate(R.layout.quickedit, null);
 743		final EditText editor = (EditText) view.findViewById(R.id.editor);
 744		OnClickListener mClickListener = new OnClickListener() {
 745
 746			@Override
 747			public void onClick(DialogInterface dialog, int which) {
 748				String value = editor.getText().toString();
 749				if (!value.equals(previousValue) && value.trim().length() > 0) {
 750					callback.onValueEdited(value);
 751				}
 752			}
 753		};
 754		if (password) {
 755			editor.setInputType(InputType.TYPE_CLASS_TEXT
 756					| InputType.TYPE_TEXT_VARIATION_PASSWORD);
 757			builder.setPositiveButton(R.string.accept, mClickListener);
 758		} else {
 759			builder.setPositiveButton(R.string.edit, mClickListener);
 760		}
 761		if (hint != 0) {
 762			editor.setHint(hint);
 763		}
 764		editor.requestFocus();
 765		editor.setText("");
 766		if (previousValue != null) {
 767			editor.getText().append(previousValue);
 768		}
 769		builder.setView(view);
 770		builder.setNegativeButton(R.string.cancel, null);
 771		builder.create().show();
 772	}
 773
 774	public boolean hasStoragePermission(int requestCode) {
 775		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
 776			if (checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
 777				requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, requestCode);
 778				return false;
 779			} else {
 780				return true;
 781			}
 782		} else {
 783			return true;
 784		}
 785	}
 786
 787	public void selectPresence(final Conversation conversation,
 788			final OnPresenceSelected listener) {
 789		final Contact contact = conversation.getContact();
 790		if (conversation.hasValidOtrSession()) {
 791			SessionID id = conversation.getOtrSession().getSessionID();
 792			Jid jid;
 793			try {
 794				jid = Jid.fromString(id.getAccountID() + "/" + id.getUserID());
 795			} catch (InvalidJidException e) {
 796				jid = null;
 797			}
 798			conversation.setNextCounterpart(jid);
 799			listener.onPresenceSelected();
 800		} else 	if (!contact.showInRoster()) {
 801			showAddToRosterDialog(conversation);
 802		} else {
 803			final Presences presences = contact.getPresences();
 804			if (presences.size() == 0) {
 805				if (!contact.getOption(Contact.Options.TO)
 806						&& !contact.getOption(Contact.Options.ASKING)
 807						&& contact.getAccount().getStatus() == Account.State.ONLINE) {
 808					showAskForPresenceDialog(contact);
 809				} else if (!contact.getOption(Contact.Options.TO)
 810						|| !contact.getOption(Contact.Options.FROM)) {
 811					warnMutalPresenceSubscription(conversation, listener);
 812				} else {
 813					conversation.setNextCounterpart(null);
 814					listener.onPresenceSelected();
 815				}
 816			} else if (presences.size() == 1) {
 817				String presence = presences.toResourceArray()[0];
 818				try {
 819					conversation.setNextCounterpart(Jid.fromParts(contact.getJid().getLocalpart(),contact.getJid().getDomainpart(),presence));
 820				} catch (InvalidJidException e) {
 821					conversation.setNextCounterpart(null);
 822				}
 823				listener.onPresenceSelected();
 824			} else {
 825				showPresenceSelectionDialog(presences,conversation,listener);
 826			}
 827		}
 828	}
 829
 830	private void showPresenceSelectionDialog(Presences presences, final Conversation conversation, final OnPresenceSelected listener) {
 831		final Contact contact = conversation.getContact();
 832		AlertDialog.Builder builder = new AlertDialog.Builder(this);
 833		builder.setTitle(getString(R.string.choose_presence));
 834		final String[] resourceArray = presences.toResourceArray();
 835		Pair<Map<String, String>, Map<String, String>> typeAndName = presences.toTypeAndNameMap();
 836		final Map<String,String> resourceTypeMap = typeAndName.first;
 837		final Map<String,String> resourceNameMap = typeAndName.second;
 838		final String[] readableIdentities = new String[resourceArray.length];
 839		final AtomicInteger selectedResource = new AtomicInteger(0);
 840		for (int i = 0; i < resourceArray.length; ++i) {
 841			String resource = resourceArray[i];
 842			if (resource.equals(contact.getLastResource())) {
 843				selectedResource.set(i);
 844			}
 845			String type = resourceTypeMap.get(resource);
 846			String name = resourceNameMap.get(resource);
 847			if (type != null) {
 848				if (Collections.frequency(resourceTypeMap.values(),type) == 1) {
 849					readableIdentities[i] = UIHelper.tranlasteType(this,type);
 850				} else if (name != null) {
 851					if (Collections.frequency(resourceNameMap.values(), name) == 1
 852							|| CryptoHelper.UUID_PATTERN.matcher(resource).matches()) {
 853						readableIdentities[i] = UIHelper.tranlasteType(this,type) + "  (" + name+")";
 854					} else {
 855						readableIdentities[i] = UIHelper.tranlasteType(this,type) + " (" + name +" / " + resource+")";
 856					}
 857				} else {
 858					readableIdentities[i] = UIHelper.tranlasteType(this,type) + " (" + resource+")";
 859				}
 860			} else {
 861				readableIdentities[i] = resource;
 862			}
 863		}
 864		builder.setSingleChoiceItems(readableIdentities,
 865				selectedResource.get(),
 866				new DialogInterface.OnClickListener() {
 867
 868					@Override
 869					public void onClick(DialogInterface dialog, int which) {
 870						selectedResource.set(which);
 871					}
 872				});
 873		builder.setNegativeButton(R.string.cancel, null);
 874		builder.setPositiveButton(R.string.ok, new OnClickListener() {
 875
 876			@Override
 877			public void onClick(DialogInterface dialog, int which) {
 878				try {
 879					Jid next = Jid.fromParts(contact.getJid().getLocalpart(),contact.getJid().getDomainpart(),resourceArray[selectedResource.get()]);
 880					conversation.setNextCounterpart(next);
 881				} catch (InvalidJidException e) {
 882					conversation.setNextCounterpart(null);
 883				}
 884				listener.onPresenceSelected();
 885			}
 886		});
 887		builder.create().show();
 888	}
 889
 890	protected void onActivityResult(int requestCode, int resultCode, final Intent data) {
 891		super.onActivityResult(requestCode, resultCode, data);
 892		if (requestCode == REQUEST_INVITE_TO_CONVERSATION && resultCode == RESULT_OK) {
 893			mPendingConferenceInvite = ConferenceInvite.parse(data);
 894			if (xmppConnectionServiceBound && mPendingConferenceInvite != null) {
 895				if (mPendingConferenceInvite.execute(this)) {
 896					mToast = Toast.makeText(this, R.string.creating_conference, Toast.LENGTH_LONG);
 897					mToast.show();
 898				}
 899				mPendingConferenceInvite = null;
 900			}
 901		}
 902	}
 903
 904
 905	private UiCallback<Conversation> adhocCallback = new UiCallback<Conversation>() {
 906		@Override
 907		public void success(final Conversation conversation) {
 908			runOnUiThread(new Runnable() {
 909				@Override
 910				public void run() {
 911					switchToConversation(conversation);
 912					hideToast();
 913				}
 914			});
 915		}
 916
 917		@Override
 918		public void error(final int errorCode, Conversation object) {
 919			runOnUiThread(new Runnable() {
 920				@Override
 921				public void run() {
 922					replaceToast(getString(errorCode));
 923				}
 924			});
 925		}
 926
 927		@Override
 928		public void userInputRequried(PendingIntent pi, Conversation object) {
 929
 930		}
 931	};
 932
 933	public int getTertiaryTextColor() {
 934		return this.mTertiaryTextColor;
 935	}
 936
 937	public int getSecondaryTextColor() {
 938		return this.mSecondaryTextColor;
 939	}
 940
 941	public int getPrimaryTextColor() {
 942		return this.mPrimaryTextColor;
 943	}
 944
 945	public int getWarningTextColor() {
 946		return this.mColorRed;
 947	}
 948
 949	public int getOnlineColor() {
 950		return this.mColorGreen;
 951	}
 952
 953	public int getPrimaryBackgroundColor() {
 954		return this.mPrimaryBackgroundColor;
 955	}
 956
 957	public int getSecondaryBackgroundColor() {
 958		return this.mSecondaryBackgroundColor;
 959	}
 960
 961	public int getPixel(int dp) {
 962		DisplayMetrics metrics = getResources().getDisplayMetrics();
 963		return ((int) (dp * metrics.density));
 964	}
 965
 966	public boolean copyTextToClipboard(String text, int labelResId) {
 967		ClipboardManager mClipBoardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
 968		String label = getResources().getString(labelResId);
 969		if (mClipBoardManager != null) {
 970			ClipData mClipData = ClipData.newPlainText(label, text);
 971			mClipBoardManager.setPrimaryClip(mClipData);
 972			return true;
 973		}
 974		return false;
 975	}
 976
 977	protected void registerNdefPushMessageCallback() {
 978		NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(this);
 979		if (nfcAdapter != null && nfcAdapter.isEnabled()) {
 980			nfcAdapter.setNdefPushMessageCallback(new NfcAdapter.CreateNdefMessageCallback() {
 981				@Override
 982				public NdefMessage createNdefMessage(NfcEvent nfcEvent) {
 983					return new NdefMessage(new NdefRecord[]{
 984							NdefRecord.createUri(getShareableUri()),
 985							NdefRecord.createApplicationRecord("eu.siacs.conversations")
 986					});
 987				}
 988			}, this);
 989		}
 990	}
 991
 992	protected boolean neverCompressPictures() {
 993		return getPreferences().getString("picture_compression", "auto").equals("never");
 994	}
 995
 996	protected boolean manuallyChangePresence() {
 997		return getPreferences().getBoolean("manually_change_presence", false);
 998	}
 999
1000	protected void unregisterNdefPushMessageCallback() {
1001		NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(this);
1002		if (nfcAdapter != null && nfcAdapter.isEnabled()) {
1003			nfcAdapter.setNdefPushMessageCallback(null,this);
1004		}
1005	}
1006
1007	protected String getShareableUri() {
1008		return null;
1009	}
1010
1011	protected void shareUri() {
1012		String uri = getShareableUri();
1013		if (uri == null || uri.isEmpty()) {
1014			return;
1015		}
1016		Intent shareIntent = new Intent();
1017		shareIntent.setAction(Intent.ACTION_SEND);
1018		shareIntent.putExtra(Intent.EXTRA_TEXT, getShareableUri());
1019		shareIntent.setType("text/plain");
1020		try {
1021			startActivity(Intent.createChooser(shareIntent, getText(R.string.share_uri_with)));
1022		} catch (ActivityNotFoundException e) {
1023			Toast.makeText(this, R.string.no_application_to_share_uri, Toast.LENGTH_SHORT).show();
1024		}
1025	}
1026
1027	@Override
1028	public void onResume() {
1029		super.onResume();
1030		if (this.getShareableUri()!=null) {
1031			this.registerNdefPushMessageCallback();
1032		}
1033	}
1034
1035	protected int findTheme() {
1036		Boolean dark   = getPreferences().getString("theme", "light").equals("dark");
1037		Boolean larger = getPreferences().getBoolean("use_larger_font", false);
1038
1039		if(dark) {
1040			if(larger)
1041				return R.style.ConversationsTheme_Dark_LargerText;
1042			else
1043				return R.style.ConversationsTheme_Dark;
1044		} else {
1045			if (larger)
1046				return R.style.ConversationsTheme_LargerText;
1047			else
1048				return R.style.ConversationsTheme;
1049		}
1050	}
1051
1052	@Override
1053	public void onPause() {
1054		super.onPause();
1055		this.unregisterNdefPushMessageCallback();
1056	}
1057
1058	protected void showQrCode() {
1059		String uri = getShareableUri();
1060		if (uri!=null) {
1061			Point size = new Point();
1062			getWindowManager().getDefaultDisplay().getSize(size);
1063			final int width = (size.x < size.y ? size.x : size.y);
1064			Bitmap bitmap = createQrCodeBitmap(uri, width);
1065			ImageView view = new ImageView(this);
1066			view.setBackgroundColor(Color.WHITE);
1067			view.setImageBitmap(bitmap);
1068			AlertDialog.Builder builder = new AlertDialog.Builder(this);
1069			builder.setView(view);
1070			builder.create().show();
1071		}
1072	}
1073
1074	protected Bitmap createQrCodeBitmap(String input, int size) {
1075		Log.d(Config.LOGTAG,"qr code requested size: "+size);
1076		try {
1077			final QRCodeWriter QR_CODE_WRITER = new QRCodeWriter();
1078			final Hashtable<EncodeHintType, Object> hints = new Hashtable<>();
1079			hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
1080			final BitMatrix result = QR_CODE_WRITER.encode(input, BarcodeFormat.QR_CODE, size, size, hints);
1081			final int width = result.getWidth();
1082			final int height = result.getHeight();
1083			final int[] pixels = new int[width * height];
1084			for (int y = 0; y < height; y++) {
1085				final int offset = y * width;
1086				for (int x = 0; x < width; x++) {
1087					pixels[offset + x] = result.get(x, y) ? Color.BLACK : Color.TRANSPARENT;
1088				}
1089			}
1090			final Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
1091			Log.d(Config.LOGTAG,"output size: "+width+"x"+height);
1092			bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
1093			return bitmap;
1094		} catch (final WriterException e) {
1095			return null;
1096		}
1097	}
1098
1099	protected Account extractAccount(Intent intent) {
1100		String jid = intent != null ? intent.getStringExtra(EXTRA_ACCOUNT) : null;
1101		try {
1102			return jid != null ? xmppConnectionService.findAccountByJid(Jid.fromString(jid)) : null;
1103		} catch (InvalidJidException e) {
1104			return null;
1105		}
1106	}
1107
1108	public static class ConferenceInvite {
1109		private String uuid;
1110		private List<Jid> jids = new ArrayList<>();
1111
1112		public static ConferenceInvite parse(Intent data) {
1113			ConferenceInvite invite = new ConferenceInvite();
1114			invite.uuid = data.getStringExtra("conversation");
1115			if (invite.uuid == null) {
1116				return null;
1117			}
1118			try {
1119				if (data.getBooleanExtra("multiple", false)) {
1120					String[] toAdd = data.getStringArrayExtra("contacts");
1121					for (String item : toAdd) {
1122						invite.jids.add(Jid.fromString(item));
1123					}
1124				} else {
1125					invite.jids.add(Jid.fromString(data.getStringExtra("contact")));
1126				}
1127			} catch (final InvalidJidException ignored) {
1128				return null;
1129			}
1130			return invite;
1131		}
1132
1133		public boolean execute(XmppActivity activity) {
1134			XmppConnectionService service = activity.xmppConnectionService;
1135			Conversation conversation = service.findConversationByUuid(this.uuid);
1136			if (conversation == null) {
1137				return false;
1138			}
1139			if (conversation.getMode() == Conversation.MODE_MULTI) {
1140				for (Jid jid : jids) {
1141					service.invite(conversation, jid);
1142				}
1143				return false;
1144			} else {
1145				jids.add(conversation.getJid().toBareJid());
1146				service.createAdhocConference(conversation.getAccount(), null, jids, activity.adhocCallback);
1147				return true;
1148			}
1149		}
1150	}
1151
1152	public AvatarService avatarService() {
1153		return xmppConnectionService.getAvatarService();
1154	}
1155
1156	class BitmapWorkerTask extends AsyncTask<Message, Void, Bitmap> {
1157		private final WeakReference<ImageView> imageViewReference;
1158		private Message message = null;
1159
1160		public BitmapWorkerTask(ImageView imageView) {
1161			imageViewReference = new WeakReference<>(imageView);
1162		}
1163
1164		@Override
1165		protected Bitmap doInBackground(Message... params) {
1166			if (isCancelled()) {
1167				return null;
1168			}
1169			message = params[0];
1170			try {
1171				return xmppConnectionService.getFileBackend().getThumbnail(
1172						message, (int) (metrics.density * 288), false);
1173			} catch (FileNotFoundException e) {
1174				return null;
1175			}
1176		}
1177
1178		@Override
1179		protected void onPostExecute(Bitmap bitmap) {
1180			if (bitmap != null && !isCancelled()) {
1181				final ImageView imageView = imageViewReference.get();
1182				if (imageView != null) {
1183					imageView.setImageBitmap(bitmap);
1184					imageView.setBackgroundColor(0x00000000);
1185				}
1186			}
1187		}
1188	}
1189
1190	public void loadBitmap(Message message, ImageView imageView) {
1191		Bitmap bm;
1192		try {
1193			bm = xmppConnectionService.getFileBackend().getThumbnail(message,
1194					(int) (metrics.density * 288), true);
1195		} catch (FileNotFoundException e) {
1196			bm = null;
1197		}
1198		if (bm != null) {
1199			cancelPotentialWork(message, imageView);
1200			imageView.setImageBitmap(bm);
1201			imageView.setBackgroundColor(0x00000000);
1202		} else {
1203			if (cancelPotentialWork(message, imageView)) {
1204				imageView.setBackgroundColor(0xff333333);
1205				imageView.setImageDrawable(null);
1206				final BitmapWorkerTask task = new BitmapWorkerTask(imageView);
1207				final AsyncDrawable asyncDrawable = new AsyncDrawable(
1208						getResources(), null, task);
1209				imageView.setImageDrawable(asyncDrawable);
1210				try {
1211					task.execute(message);
1212				} catch (final RejectedExecutionException ignored) {
1213					ignored.printStackTrace();
1214				}
1215			}
1216		}
1217	}
1218
1219	public static boolean cancelPotentialWork(Message message, ImageView imageView) {
1220		final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
1221
1222		if (bitmapWorkerTask != null) {
1223			final Message oldMessage = bitmapWorkerTask.message;
1224			if (oldMessage == null || message != oldMessage) {
1225				bitmapWorkerTask.cancel(true);
1226			} else {
1227				return false;
1228			}
1229		}
1230		return true;
1231	}
1232
1233	private static BitmapWorkerTask getBitmapWorkerTask(ImageView imageView) {
1234		if (imageView != null) {
1235			final Drawable drawable = imageView.getDrawable();
1236			if (drawable instanceof AsyncDrawable) {
1237				final AsyncDrawable asyncDrawable = (AsyncDrawable) drawable;
1238				return asyncDrawable.getBitmapWorkerTask();
1239			}
1240		}
1241		return null;
1242	}
1243
1244	static class AsyncDrawable extends BitmapDrawable {
1245		private final WeakReference<BitmapWorkerTask> bitmapWorkerTaskReference;
1246
1247		public AsyncDrawable(Resources res, Bitmap bitmap,
1248				BitmapWorkerTask bitmapWorkerTask) {
1249			super(res, bitmap);
1250			bitmapWorkerTaskReference = new WeakReference<>(
1251					bitmapWorkerTask);
1252		}
1253
1254		public BitmapWorkerTask getBitmapWorkerTask() {
1255			return bitmapWorkerTaskReference.get();
1256		}
1257	}
1258}