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