1package eu.siacs.conversations.ui;
2
3import android.annotation.SuppressLint;
4import android.app.Activity;
5import android.app.AlertDialog;
6import android.app.AlertDialog.Builder;
7import android.app.PendingIntent;
8import android.content.ClipData;
9import android.content.ClipboardManager;
10import android.content.ComponentName;
11import android.content.Context;
12import android.content.DialogInterface;
13import android.content.DialogInterface.OnClickListener;
14import android.content.Intent;
15import android.content.IntentSender.SendIntentException;
16import android.content.ServiceConnection;
17import android.content.SharedPreferences;
18import android.content.pm.PackageManager;
19import android.content.pm.ResolveInfo;
20import android.content.res.Resources;
21import android.graphics.Bitmap;
22import android.graphics.Color;
23import android.graphics.Point;
24import android.graphics.drawable.BitmapDrawable;
25import android.graphics.drawable.Drawable;
26import android.net.Uri;
27import android.nfc.NdefMessage;
28import android.nfc.NdefRecord;
29import android.nfc.NfcAdapter;
30import android.nfc.NfcEvent;
31import android.os.AsyncTask;
32import android.os.Bundle;
33import android.os.IBinder;
34import android.preference.PreferenceManager;
35import android.text.InputType;
36import android.util.DisplayMetrics;
37import android.util.Log;
38import android.view.MenuItem;
39import android.view.View;
40import android.view.inputmethod.InputMethodManager;
41import android.widget.EditText;
42import android.widget.ImageView;
43
44import com.google.zxing.BarcodeFormat;
45import com.google.zxing.EncodeHintType;
46import com.google.zxing.WriterException;
47import com.google.zxing.common.BitMatrix;
48import com.google.zxing.qrcode.QRCodeWriter;
49import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
50
51import net.java.otr4j.session.SessionID;
52
53import java.io.FileNotFoundException;
54import java.lang.ref.WeakReference;
55import java.util.Hashtable;
56import java.util.List;
57import java.util.concurrent.RejectedExecutionException;
58
59import eu.siacs.conversations.Config;
60import eu.siacs.conversations.R;
61import eu.siacs.conversations.entities.Account;
62import eu.siacs.conversations.entities.Contact;
63import eu.siacs.conversations.entities.Conversation;
64import eu.siacs.conversations.entities.Message;
65import eu.siacs.conversations.entities.MucOptions;
66import eu.siacs.conversations.entities.Presences;
67import eu.siacs.conversations.services.AvatarService;
68import eu.siacs.conversations.services.XmppConnectionService;
69import eu.siacs.conversations.services.XmppConnectionService.XmppConnectionBinder;
70import eu.siacs.conversations.utils.ExceptionHelper;
71import eu.siacs.conversations.xmpp.jid.InvalidJidException;
72import eu.siacs.conversations.xmpp.jid.Jid;
73
74public abstract class XmppActivity extends Activity {
75
76 protected static final int REQUEST_ANNOUNCE_PGP = 0x0101;
77 protected static final int REQUEST_INVITE_TO_CONVERSATION = 0x0102;
78
79 public XmppConnectionService xmppConnectionService;
80 public boolean xmppConnectionServiceBound = false;
81 protected boolean registeredListeners = false;
82
83 protected int mPrimaryTextColor;
84 protected int mSecondaryTextColor;
85 protected int mSecondaryBackgroundColor;
86 protected int mColorRed;
87 protected int mColorOrange;
88 protected int mColorGreen;
89 protected int mPrimaryColor;
90
91 protected boolean mUseSubject = true;
92
93 private DisplayMetrics metrics;
94
95 protected interface OnValueEdited {
96 public void onValueEdited(String value);
97 }
98
99 public interface OnPresenceSelected {
100 public void onPresenceSelected();
101 }
102
103 protected ServiceConnection mConnection = new ServiceConnection() {
104
105 @Override
106 public void onServiceConnected(ComponentName className, IBinder service) {
107 XmppConnectionBinder binder = (XmppConnectionBinder) service;
108 xmppConnectionService = binder.getService();
109 xmppConnectionServiceBound = true;
110 if (!registeredListeners) {
111 registerListeners();
112 registeredListeners = true;
113 }
114 onBackendConnected();
115 }
116
117 @Override
118 public void onServiceDisconnected(ComponentName arg0) {
119 xmppConnectionServiceBound = false;
120 }
121 };
122
123 @Override
124 protected void onStart() {
125 super.onStart();
126 if (!xmppConnectionServiceBound) {
127 connectToBackend();
128 } else {
129 if (!registeredListeners) {
130 this.registerListeners();
131 this.registeredListeners = true;
132 }
133 this.onBackendConnected();
134 }
135 }
136
137 public void connectToBackend() {
138 Intent intent = new Intent(this, XmppConnectionService.class);
139 intent.setAction("ui");
140 startService(intent);
141 bindService(intent, mConnection, Context.BIND_AUTO_CREATE);
142 }
143
144 @Override
145 protected void onStop() {
146 super.onStop();
147 if (xmppConnectionServiceBound) {
148 if (registeredListeners) {
149 this.unregisterListeners();
150 this.registeredListeners = false;
151 }
152 unbindService(mConnection);
153 xmppConnectionServiceBound = false;
154 }
155 }
156
157 protected void hideKeyboard() {
158 InputMethodManager inputManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
159
160 View focus = getCurrentFocus();
161
162 if (focus != null) {
163
164 inputManager.hideSoftInputFromWindow(focus.getWindowToken(),
165 InputMethodManager.HIDE_NOT_ALWAYS);
166 }
167 }
168
169 public boolean hasPgp() {
170 return xmppConnectionService.getPgpEngine() != null;
171 }
172
173 public void showInstallPgpDialog() {
174 Builder builder = new AlertDialog.Builder(this);
175 builder.setTitle(getString(R.string.openkeychain_required));
176 builder.setIconAttribute(android.R.attr.alertDialogIcon);
177 builder.setMessage(getText(R.string.openkeychain_required_long));
178 builder.setNegativeButton(getString(R.string.cancel), null);
179 builder.setNeutralButton(getString(R.string.restart),
180 new OnClickListener() {
181
182 @Override
183 public void onClick(DialogInterface dialog, int which) {
184 if (xmppConnectionServiceBound) {
185 unbindService(mConnection);
186 xmppConnectionServiceBound = false;
187 }
188 stopService(new Intent(XmppActivity.this,
189 XmppConnectionService.class));
190 finish();
191 }
192 });
193 builder.setPositiveButton(getString(R.string.install),
194 new OnClickListener() {
195
196 @Override
197 public void onClick(DialogInterface dialog, int which) {
198 Uri uri = Uri
199 .parse("market://details?id=org.sufficientlysecure.keychain");
200 Intent marketIntent = new Intent(Intent.ACTION_VIEW,
201 uri);
202 PackageManager manager = getApplicationContext()
203 .getPackageManager();
204 List<ResolveInfo> infos = manager
205 .queryIntentActivities(marketIntent, 0);
206 if (infos.size() > 0) {
207 startActivity(marketIntent);
208 } else {
209 uri = Uri.parse("http://www.openkeychain.org/");
210 Intent browserIntent = new Intent(
211 Intent.ACTION_VIEW, uri);
212 startActivity(browserIntent);
213 }
214 finish();
215 }
216 });
217 builder.create().show();
218 }
219
220 abstract void onBackendConnected();
221
222 protected void registerListeners() {
223 if (this instanceof XmppConnectionService.OnConversationUpdate) {
224 this.xmppConnectionService.setOnConversationListChangedListener((XmppConnectionService.OnConversationUpdate) this);
225 }
226 if (this instanceof XmppConnectionService.OnAccountUpdate) {
227 this.xmppConnectionService.setOnAccountListChangedListener((XmppConnectionService.OnAccountUpdate) this);
228 }
229 if (this instanceof XmppConnectionService.OnRosterUpdate) {
230 this.xmppConnectionService.setOnRosterUpdateListener((XmppConnectionService.OnRosterUpdate) this);
231 }
232 if (this instanceof MucOptions.OnRenameListener) {
233 this.xmppConnectionService.setOnRenameListener((MucOptions.OnRenameListener) this);
234 }
235 }
236
237 protected void unregisterListeners() {
238 if (this instanceof XmppConnectionService.OnConversationUpdate) {
239 this.xmppConnectionService.removeOnConversationListChangedListener();
240 }
241 if (this instanceof XmppConnectionService.OnAccountUpdate) {
242 this.xmppConnectionService.removeOnAccountListChangedListener();
243 }
244 if (this instanceof XmppConnectionService.OnRosterUpdate) {
245 this.xmppConnectionService.removeOnRosterUpdateListener();
246 }
247 if (this instanceof MucOptions.OnRenameListener) {
248 this.xmppConnectionService.setOnRenameListener(null);
249 }
250 }
251
252 public boolean onOptionsItemSelected(MenuItem item) {
253 switch (item.getItemId()) {
254 case R.id.action_settings:
255 startActivity(new Intent(this, SettingsActivity.class));
256 break;
257 case R.id.action_accounts:
258 startActivity(new Intent(this, ManageAccountActivity.class));
259 break;
260 case android.R.id.home:
261 finish();
262 break;
263 case R.id.action_show_qr_code:
264 showQrCode();
265 break;
266 }
267 return super.onOptionsItemSelected(item);
268 }
269
270 @Override
271 protected void onCreate(Bundle savedInstanceState) {
272 super.onCreate(savedInstanceState);
273 metrics = getResources().getDisplayMetrics();
274 ExceptionHelper.init(getApplicationContext());
275 mPrimaryTextColor = getResources().getColor(R.color.primarytext);
276 mSecondaryTextColor = getResources().getColor(R.color.secondarytext);
277 mColorRed = getResources().getColor(R.color.red);
278 mColorOrange = getResources().getColor(R.color.orange);
279 mColorGreen = getResources().getColor(R.color.green);
280 mPrimaryColor = getResources().getColor(R.color.primary);
281 mSecondaryBackgroundColor = getResources().getColor(
282 R.color.secondarybackground);
283 if (getPreferences().getBoolean("use_larger_font", false)) {
284 setTheme(R.style.ConversationsTheme_LargerText);
285 }
286 mUseSubject = getPreferences().getBoolean("use_subject", true);
287 }
288
289 protected SharedPreferences getPreferences() {
290 return PreferenceManager
291 .getDefaultSharedPreferences(getApplicationContext());
292 }
293
294 public boolean useSubjectToIdentifyConference() {
295 return mUseSubject;
296 }
297
298 public void switchToConversation(Conversation conversation) {
299 switchToConversation(conversation, null, false);
300 }
301
302 public void switchToConversation(Conversation conversation, String text,
303 boolean newTask) {
304 Intent viewConversationIntent = new Intent(this,
305 ConversationActivity.class);
306 viewConversationIntent.setAction(Intent.ACTION_VIEW);
307 viewConversationIntent.putExtra(ConversationActivity.CONVERSATION,
308 conversation.getUuid());
309 if (text != null) {
310 viewConversationIntent.putExtra(ConversationActivity.TEXT, text);
311 }
312 viewConversationIntent.setType(ConversationActivity.VIEW_CONVERSATION);
313 if (newTask) {
314 viewConversationIntent.setFlags(viewConversationIntent.getFlags()
315 | Intent.FLAG_ACTIVITY_NEW_TASK
316 | Intent.FLAG_ACTIVITY_SINGLE_TOP);
317 } else {
318 viewConversationIntent.setFlags(viewConversationIntent.getFlags()
319 | Intent.FLAG_ACTIVITY_CLEAR_TOP);
320 }
321 startActivity(viewConversationIntent);
322 finish();
323 }
324
325 public void switchToContactDetails(Contact contact) {
326 Intent intent = new Intent(this, ContactDetailsActivity.class);
327 intent.setAction(ContactDetailsActivity.ACTION_VIEW_CONTACT);
328 intent.putExtra("account", contact.getAccount().getJid().toBareJid().toString());
329 intent.putExtra("contact", contact.getJid().toString());
330 startActivity(intent);
331 }
332
333 public void switchToAccount(Account account) {
334 Intent intent = new Intent(this, EditAccountActivity.class);
335 intent.putExtra("jid", account.getJid().toBareJid().toString());
336 startActivity(intent);
337 }
338
339 protected void inviteToConversation(Conversation conversation) {
340 Intent intent = new Intent(getApplicationContext(),
341 ChooseContactActivity.class);
342 intent.putExtra("conversation", conversation.getUuid());
343 startActivityForResult(intent, REQUEST_INVITE_TO_CONVERSATION);
344 }
345
346 protected void announcePgp(Account account, final Conversation conversation) {
347 xmppConnectionService.getPgpEngine().generateSignature(account,
348 "online", new UiCallback<Account>() {
349
350 @Override
351 public void userInputRequried(PendingIntent pi,
352 Account account) {
353 try {
354 startIntentSenderForResult(pi.getIntentSender(),
355 REQUEST_ANNOUNCE_PGP, null, 0, 0, 0);
356 } catch (final SendIntentException ignored) {
357 }
358 }
359
360 @Override
361 public void success(Account account) {
362 xmppConnectionService.databaseBackend
363 .updateAccount(account);
364 xmppConnectionService.sendPresencePacket(account,
365 xmppConnectionService.getPresenceGenerator()
366 .sendPresence(account));
367 if (conversation != null) {
368 conversation
369 .setNextEncryption(Message.ENCRYPTION_PGP);
370 xmppConnectionService.databaseBackend
371 .updateConversation(conversation);
372 }
373 }
374
375 @Override
376 public void error(int error, Account account) {
377 displayErrorDialog(error);
378 }
379 });
380 }
381
382 protected void displayErrorDialog(final int errorCode) {
383 runOnUiThread(new Runnable() {
384
385 @Override
386 public void run() {
387 AlertDialog.Builder builder = new AlertDialog.Builder(
388 XmppActivity.this);
389 builder.setIconAttribute(android.R.attr.alertDialogIcon);
390 builder.setTitle(getString(R.string.error));
391 builder.setMessage(errorCode);
392 builder.setNeutralButton(R.string.accept, null);
393 builder.create().show();
394 }
395 });
396
397 }
398
399 protected void showAddToRosterDialog(final Conversation conversation) {
400 final Jid jid = conversation.getContactJid();
401 AlertDialog.Builder builder = new AlertDialog.Builder(this);
402 builder.setTitle(jid.toString());
403 builder.setMessage(getString(R.string.not_in_roster));
404 builder.setNegativeButton(getString(R.string.cancel), null);
405 builder.setPositiveButton(getString(R.string.add_contact),
406 new DialogInterface.OnClickListener() {
407
408 @Override
409 public void onClick(DialogInterface dialog, int which) {
410 final Jid jid = conversation.getContactJid();
411 Account account = conversation.getAccount();
412 Contact contact = account.getRoster().getContact(jid);
413 xmppConnectionService.createContact(contact);
414 switchToContactDetails(contact);
415 }
416 });
417 builder.create().show();
418 }
419
420 private void showAskForPresenceDialog(final Contact contact) {
421 AlertDialog.Builder builder = new AlertDialog.Builder(this);
422 builder.setTitle(contact.getJid().toString());
423 builder.setMessage(R.string.request_presence_updates);
424 builder.setNegativeButton(R.string.cancel, null);
425 builder.setPositiveButton(R.string.request_now,
426 new DialogInterface.OnClickListener() {
427
428 @Override
429 public void onClick(DialogInterface dialog, int which) {
430 if (xmppConnectionServiceBound) {
431 xmppConnectionService.sendPresencePacket(contact
432 .getAccount(), xmppConnectionService
433 .getPresenceGenerator()
434 .requestPresenceUpdatesFrom(contact));
435 }
436 }
437 });
438 builder.create().show();
439 }
440
441 private void warnMutalPresenceSubscription(final Conversation conversation,
442 final OnPresenceSelected listener) {
443 AlertDialog.Builder builder = new AlertDialog.Builder(this);
444 builder.setTitle(conversation.getContact().getJid().toString());
445 builder.setMessage(R.string.without_mutual_presence_updates);
446 builder.setNegativeButton(R.string.cancel, null);
447 builder.setPositiveButton(R.string.ignore, new OnClickListener() {
448
449 @Override
450 public void onClick(DialogInterface dialog, int which) {
451 conversation.setNextCounterpart(null);
452 if (listener != null) {
453 listener.onPresenceSelected();
454 }
455 }
456 });
457 builder.create().show();
458 }
459
460 protected void quickEdit(String previousValue, OnValueEdited callback) {
461 quickEdit(previousValue, callback, false);
462 }
463
464 protected void quickPasswordEdit(String previousValue,
465 OnValueEdited callback) {
466 quickEdit(previousValue, callback, true);
467 }
468
469 @SuppressLint("InflateParams")
470 private void quickEdit(final String previousValue,
471 final OnValueEdited callback, boolean password) {
472 AlertDialog.Builder builder = new AlertDialog.Builder(this);
473 View view = getLayoutInflater().inflate(R.layout.quickedit, null);
474 final EditText editor = (EditText) view.findViewById(R.id.editor);
475 OnClickListener mClickListener = new OnClickListener() {
476
477 @Override
478 public void onClick(DialogInterface dialog, int which) {
479 String value = editor.getText().toString();
480 if (!previousValue.equals(value) && value.trim().length() > 0) {
481 callback.onValueEdited(value);
482 }
483 }
484 };
485 if (password) {
486 editor.setInputType(InputType.TYPE_CLASS_TEXT
487 | InputType.TYPE_TEXT_VARIATION_PASSWORD);
488 editor.setHint(R.string.password);
489 builder.setPositiveButton(R.string.accept, mClickListener);
490 } else {
491 builder.setPositiveButton(R.string.edit, mClickListener);
492 }
493 editor.requestFocus();
494 editor.setText(previousValue);
495 builder.setView(view);
496 builder.setNegativeButton(R.string.cancel, null);
497 builder.create().show();
498 }
499
500 public void selectPresence(final Conversation conversation,
501 final OnPresenceSelected listener) {
502 final Contact contact = conversation.getContact();
503 if (conversation.hasValidOtrSession()) {
504 SessionID id = conversation.getOtrSession().getSessionID();
505 Jid jid;
506 try {
507 jid = Jid.fromString(id.getAccountID() + "/" + id.getUserID());
508 } catch (InvalidJidException e) {
509 jid = null;
510 }
511 conversation.setNextCounterpart(jid);
512 listener.onPresenceSelected();
513 } else if (!contact.showInRoster()) {
514 showAddToRosterDialog(conversation);
515 } else {
516 Presences presences = contact.getPresences();
517 if (presences.size() == 0) {
518 if (!contact.getOption(Contact.Options.TO)
519 && !contact.getOption(Contact.Options.ASKING)
520 && contact.getAccount().getStatus() == Account.STATUS_ONLINE) {
521 showAskForPresenceDialog(contact);
522 } else if (!contact.getOption(Contact.Options.TO)
523 || !contact.getOption(Contact.Options.FROM)) {
524 warnMutalPresenceSubscription(conversation, listener);
525 } else {
526 conversation.setNextCounterpart(null);
527 listener.onPresenceSelected();
528 }
529 } else if (presences.size() == 1) {
530 String presence = presences.asStringArray()[0];
531 try {
532 conversation.setNextCounterpart(Jid.fromParts(contact.getJid().getLocalpart(),contact.getJid().getDomainpart(),presence));
533 } catch (InvalidJidException e) {
534 conversation.setNextCounterpart(null);
535 }
536 listener.onPresenceSelected();
537 } else {
538 final StringBuilder presence = new StringBuilder();
539 AlertDialog.Builder builder = new AlertDialog.Builder(this);
540 builder.setTitle(getString(R.string.choose_presence));
541 final String[] presencesArray = presences.asStringArray();
542 int preselectedPresence = 0;
543 for (int i = 0; i < presencesArray.length; ++i) {
544 if (presencesArray[i].equals(contact.lastseen.presence)) {
545 preselectedPresence = i;
546 break;
547 }
548 }
549 presence.append(presencesArray[preselectedPresence]);
550 builder.setSingleChoiceItems(presencesArray,
551 preselectedPresence,
552 new DialogInterface.OnClickListener() {
553
554 @Override
555 public void onClick(DialogInterface dialog,
556 int which) {
557 presence.delete(0, presence.length());
558 presence.append(presencesArray[which]);
559 }
560 });
561 builder.setNegativeButton(R.string.cancel, null);
562 builder.setPositiveButton(R.string.ok, new OnClickListener() {
563
564 @Override
565 public void onClick(DialogInterface dialog, int which) {
566 try {
567 conversation.setNextCounterpart(Jid.fromParts(contact.getJid().getLocalpart(),contact.getJid().getDomainpart(),presence.toString()));
568 } catch (InvalidJidException e) {
569 conversation.setNextCounterpart(null);
570 }
571 listener.onPresenceSelected();
572 }
573 });
574 builder.create().show();
575 }
576 }
577 }
578
579 protected void onActivityResult(int requestCode, int resultCode,
580 final Intent data) {
581 super.onActivityResult(requestCode, resultCode, data);
582 if (requestCode == REQUEST_INVITE_TO_CONVERSATION
583 && resultCode == RESULT_OK) {
584 String contactJid = data.getStringExtra("contact");
585 String conversationUuid = data.getStringExtra("conversation");
586 Conversation conversation = xmppConnectionService
587 .findConversationByUuid(conversationUuid);
588 if (conversation.getMode() == Conversation.MODE_MULTI) {
589 xmppConnectionService.invite(conversation, contactJid);
590 }
591 Log.d(Config.LOGTAG, "inviting " + contactJid + " to "
592 + conversation.getName());
593 }
594 }
595
596 public int getSecondaryTextColor() {
597 return this.mSecondaryTextColor;
598 }
599
600 public int getPrimaryTextColor() {
601 return this.mPrimaryTextColor;
602 }
603
604 public int getWarningTextColor() {
605 return this.mColorRed;
606 }
607
608 public int getPrimaryColor() {
609 return this.mPrimaryColor;
610 }
611
612 public int getSecondaryBackgroundColor() {
613 return this.mSecondaryBackgroundColor;
614 }
615
616 public int getPixel(int dp) {
617 DisplayMetrics metrics = getResources().getDisplayMetrics();
618 return ((int) (dp * metrics.density));
619 }
620
621 public boolean copyTextToClipboard(String text, int labelResId) {
622 ClipboardManager mClipBoardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
623 String label = getResources().getString(labelResId);
624 if (mClipBoardManager != null) {
625 ClipData mClipData = ClipData.newPlainText(label, text);
626 mClipBoardManager.setPrimaryClip(mClipData);
627 return true;
628 }
629 return false;
630 }
631
632 protected void registerNdefPushMessageCallback() {
633 NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(this);
634 if (nfcAdapter != null && nfcAdapter.isEnabled()) {
635 nfcAdapter.setNdefPushMessageCallback(new NfcAdapter.CreateNdefMessageCallback() {
636 @Override
637 public NdefMessage createNdefMessage(NfcEvent nfcEvent) {
638 return new NdefMessage(new NdefRecord[]{
639 NdefRecord.createUri(getShareableUri()),
640 NdefRecord.createApplicationRecord("eu.siacs.conversations")
641 });
642 }
643 }, this);
644 }
645 }
646
647 protected void unregisterNdefPushMessageCallback() {
648 NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(this);
649 if (nfcAdapter != null && nfcAdapter.isEnabled()) {
650 nfcAdapter.setNdefPushMessageCallback(null,this);
651 }
652 }
653
654 protected String getShareableUri() {
655 return null;
656 }
657
658 @Override
659 public void onResume() {
660 super.onResume();
661 if (this.getShareableUri()!=null) {
662 this.registerNdefPushMessageCallback();
663 }
664 }
665
666 @Override
667 public void onPause() {
668 super.onPause();
669 this.unregisterNdefPushMessageCallback();
670 }
671
672 protected void showQrCode() {
673 String uri = getShareableUri();
674 if (uri!=null) {
675 Point size = new Point();
676 getWindowManager().getDefaultDisplay().getSize(size);
677 final int width = (size.x < size.y ? size.x : size.y);
678 Bitmap bitmap = createQrCodeBitmap(uri, width);
679 ImageView view = new ImageView(this);
680 view.setImageBitmap(bitmap);
681 AlertDialog.Builder builder = new AlertDialog.Builder(this);
682 builder.setView(view);
683 builder.create().show();
684 }
685 }
686
687 protected Bitmap createQrCodeBitmap(String input, int size) {
688 try {
689 final QRCodeWriter QR_CODE_WRITER = new QRCodeWriter();
690 final Hashtable<EncodeHintType, Object> hints = new Hashtable<>();
691 hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
692 final BitMatrix result = QR_CODE_WRITER.encode(input, BarcodeFormat.QR_CODE, size, size, hints);
693 final int width = result.getWidth();
694 final int height = result.getHeight();
695 final int[] pixels = new int[width * height];
696 for (int y = 0; y < height; y++) {
697 final int offset = y * width;
698 for (int x = 0; x < width; x++) {
699 pixels[offset + x] = result.get(x, y) ? Color.BLACK : Color.TRANSPARENT;
700 }
701 }
702 final Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
703 bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
704 return bitmap;
705 } catch (final WriterException e) {
706 return null;
707 }
708 }
709
710 public AvatarService avatarService() {
711 return xmppConnectionService.getAvatarService();
712 }
713
714 class BitmapWorkerTask extends AsyncTask<Message, Void, Bitmap> {
715 private final WeakReference<ImageView> imageViewReference;
716 private Message message = null;
717
718 public BitmapWorkerTask(ImageView imageView) {
719 imageViewReference = new WeakReference<>(imageView);
720 }
721
722 @Override
723 protected Bitmap doInBackground(Message... params) {
724 message = params[0];
725 try {
726 return xmppConnectionService.getFileBackend().getThumbnail(
727 message, (int) (metrics.density * 288), false);
728 } catch (FileNotFoundException e) {
729 return null;
730 }
731 }
732
733 @Override
734 protected void onPostExecute(Bitmap bitmap) {
735 if (bitmap != null) {
736 final ImageView imageView = imageViewReference.get();
737 if (imageView != null) {
738 imageView.setImageBitmap(bitmap);
739 imageView.setBackgroundColor(0x00000000);
740 }
741 }
742 }
743 }
744
745 public void loadBitmap(Message message, ImageView imageView) {
746 Bitmap bm;
747 try {
748 bm = xmppConnectionService.getFileBackend().getThumbnail(message,
749 (int) (metrics.density * 288), true);
750 } catch (FileNotFoundException e) {
751 bm = null;
752 }
753 if (bm != null) {
754 imageView.setImageBitmap(bm);
755 imageView.setBackgroundColor(0x00000000);
756 } else {
757 if (cancelPotentialWork(message, imageView)) {
758 imageView.setBackgroundColor(0xff333333);
759 final BitmapWorkerTask task = new BitmapWorkerTask(imageView);
760 final AsyncDrawable asyncDrawable = new AsyncDrawable(
761 getResources(), null, task);
762 imageView.setImageDrawable(asyncDrawable);
763 try {
764 task.execute(message);
765 } catch (final RejectedExecutionException ignored) {
766 }
767 }
768 }
769 }
770
771 public static boolean cancelPotentialWork(Message message,
772 ImageView imageView) {
773 final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
774
775 if (bitmapWorkerTask != null) {
776 final Message oldMessage = bitmapWorkerTask.message;
777 if (oldMessage == null || message != oldMessage) {
778 bitmapWorkerTask.cancel(true);
779 } else {
780 return false;
781 }
782 }
783 return true;
784 }
785
786 private static BitmapWorkerTask getBitmapWorkerTask(ImageView imageView) {
787 if (imageView != null) {
788 final Drawable drawable = imageView.getDrawable();
789 if (drawable instanceof AsyncDrawable) {
790 final AsyncDrawable asyncDrawable = (AsyncDrawable) drawable;
791 return asyncDrawable.getBitmapWorkerTask();
792 }
793 }
794 return null;
795 }
796
797 static class AsyncDrawable extends BitmapDrawable {
798 private final WeakReference<BitmapWorkerTask> bitmapWorkerTaskReference;
799
800 public AsyncDrawable(Resources res, Bitmap bitmap,
801 BitmapWorkerTask bitmapWorkerTask) {
802 super(res, bitmap);
803 bitmapWorkerTaskReference = new WeakReference<>(
804 bitmapWorkerTask);
805 }
806
807 public BitmapWorkerTask getBitmapWorkerTask() {
808 return bitmapWorkerTaskReference.get();
809 }
810 }
811}