remove NFC + light refactoring of XmppActivity

2 files changed, 194 insertions, 284 deletions

diff --git a/src/main/AndroidManifest.xml b/src/main/AndroidManifest.xml
index 4af768d4f..9b6637d2b 100644
--- a/src/main/AndroidManifest.xml
+++ b/src/main/AndroidManifest.xml
@@ -12,7 +12,6 @@
     <uses-permission android:name="android.permission.WAKE_LOCK" />
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
     <uses-permission android:name="android.permission.VIBRATE" />
-    <uses-permission android:name="android.permission.NFC" />
     <uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS" />
     <uses-permission android:name="android.permission.RECORD_AUDIO" />
     <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
diff --git a/src/main/java/de/pixart/messenger/ui/XmppActivity.java b/src/main/java/de/pixart/messenger/ui/XmppActivity.java
index d12d3aa01..7aca6a708 100644
--- a/src/main/java/de/pixart/messenger/ui/XmppActivity.java
+++ b/src/main/java/de/pixart/messenger/ui/XmppActivity.java
@@ -14,7 +14,6 @@ import android.content.ClipboardManager;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.DialogInterface;
-import android.content.DialogInterface.OnClickListener;
 import android.content.Intent;
 import android.content.IntentSender.SendIntentException;
 import android.content.ServiceConnection;
@@ -30,10 +29,6 @@ import android.graphics.drawable.BitmapDrawable;
 import android.graphics.drawable.Drawable;
 import android.net.ConnectivityManager;
 import android.net.Uri;
-import android.nfc.NdefMessage;
-import android.nfc.NdefRecord;
-import android.nfc.NfcAdapter;
-import android.nfc.NfcEvent;
 import android.os.AsyncTask;
 import android.os.Build;
 import android.os.Bundle;
@@ -115,13 +110,84 @@ public abstract class XmppActivity extends Activity {
 
     protected boolean mUseSubject = true;
 
-    private DisplayMetrics metrics;
     protected int mTheme;
     protected boolean mUsingEnterKey = false;
 
     protected Toast mToast;
+    protected Runnable onOpenPGPKeyPublished = () -> Toast.makeText(XmppActivity.this, R.string.openpgp_has_been_published, Toast.LENGTH_SHORT).show();
+    protected ConferenceInvite mPendingConferenceInvite = null;
+    protected ServiceConnection mConnection = new ServiceConnection() {
+
+        @Override
+        public void onServiceConnected(ComponentName className, IBinder service) {
+            XmppConnectionBinder binder = (XmppConnectionBinder) service;
+            xmppConnectionService = binder.getService();
+            xmppConnectionServiceBound = true;
+            if (!registeredListeners && shouldRegisterListeners()) {
+                registerListeners();
+                registeredListeners = true;
+            }
+            onBackendConnected();
+        }
+
+        @Override
+        public void onServiceDisconnected(ComponentName arg0) {
+            xmppConnectionServiceBound = false;
+        }
+    };
+    private DisplayMetrics metrics;
+    private long mLastUiRefresh = 0;
+    private Handler mRefreshUiHandler = new Handler();
+    private Runnable mRefreshUiRunnable = () -> {
+        mLastUiRefresh = SystemClock.elapsedRealtime();
+        refreshUiReal();
+    };
+    private UiCallback<Conversation> adhocCallback = new UiCallback<Conversation>() {
+        @Override
+        public void success(final Conversation conversation) {
+            runOnUiThread(() -> {
+                switchToConversation(conversation);
+                hideToast();
+            });
+        }
+
+        @Override
+        public void error(final int errorCode, Conversation object) {
+            runOnUiThread(() -> replaceToast(getString(errorCode)));
+        }
+
+        @Override
+        public void userInputRequried(PendingIntent pi, Conversation object) {
+
+        }
+    };
+
+    public static boolean cancelPotentialWork(Message message, ImageView imageView) {
+        final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
+
+        if (bitmapWorkerTask != null) {
+            final Message oldMessage = bitmapWorkerTask.message;
+            if (oldMessage == null || message != oldMessage) {
+                bitmapWorkerTask.cancel(true);
+            } else {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    private static BitmapWorkerTask getBitmapWorkerTask(ImageView imageView) {
+        if (imageView != null) {
+            final Drawable drawable = imageView.getDrawable();
+            if (drawable instanceof AsyncDrawable) {
+                final AsyncDrawable asyncDrawable = (AsyncDrawable) drawable;
+                return asyncDrawable.getBitmapWorkerTask();
+            }
+        }
+        return null;
+    }
 
-    protected void hideToast() {
+        protected void hideToast() {
         if (mToast != null) {
             mToast.cancel();
         }
@@ -137,26 +203,6 @@ public abstract class XmppActivity extends Activity {
         mToast.show();
     }
 
-    protected Runnable onOpenPGPKeyPublished = new Runnable() {
-        @Override
-        public void run() {
-            Toast.makeText(XmppActivity.this, R.string.openpgp_has_been_published, Toast.LENGTH_SHORT).show();
-        }
-    };
-
-    private long mLastUiRefresh = 0;
-    private Handler mRefreshUiHandler = new Handler();
-    private Runnable mRefreshUiRunnable = new Runnable() {
-        @Override
-        public void run() {
-            mLastUiRefresh = SystemClock.elapsedRealtime();
-            refreshUiReal();
-        }
-    };
-
-    protected ConferenceInvite mPendingConferenceInvite = null;
-
-
     protected final void refreshUi() {
         final long diff = SystemClock.elapsedRealtime() - mLastUiRefresh;
         if (diff > Config.REFRESH_UI_INTERVAL) {
@@ -171,34 +217,6 @@ public abstract class XmppActivity extends Activity {
 
     abstract protected void refreshUiReal();
 
-    protected interface OnValueEdited {
-        String onValueEdited(String value);
-    }
-
-    public interface OnPresenceSelected {
-        void onPresenceSelected();
-    }
-
-    protected ServiceConnection mConnection = new ServiceConnection() {
-
-        @Override
-        public void onServiceConnected(ComponentName className, IBinder service) {
-            XmppConnectionBinder binder = (XmppConnectionBinder) service;
-            xmppConnectionService = binder.getService();
-            xmppConnectionServiceBound = true;
-            if (!registeredListeners && shouldRegisterListeners()) {
-                registerListeners();
-                registeredListeners = true;
-            }
-            onBackendConnected();
-        }
-
-        @Override
-        public void onServiceDisconnected(ComponentName arg0) {
-            xmppConnectionServiceBound = false;
-        }
-    };
-
     @Override
     protected void onStart() {
         super.onStart();
@@ -243,14 +261,12 @@ public abstract class XmppActivity extends Activity {
     }
 
     protected void hideKeyboard() {
-        InputMethodManager inputManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+        final InputMethodManager inputManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
 
         View focus = getCurrentFocus();
 
-        if (focus != null) {
-
-            inputManager.hideSoftInputFromWindow(focus.getWindowToken(),
-                    InputMethodManager.HIDE_NOT_ALWAYS);
+        if (focus != null && inputManager != null) {
+            inputManager.hideSoftInputFromWindow(focus.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
         }
     }
 
@@ -265,42 +281,34 @@ public abstract class XmppActivity extends Activity {
         builder.setMessage(getText(R.string.openkeychain_required_long));
         builder.setNegativeButton(getString(R.string.cancel), null);
         builder.setNeutralButton(getString(R.string.restart),
-                new OnClickListener() {
-
-                    @Override
-                    public void onClick(DialogInterface dialog, int which) {
-                        if (xmppConnectionServiceBound) {
-                            unbindService(mConnection);
-                            xmppConnectionServiceBound = false;
-                        }
-                        stopService(new Intent(XmppActivity.this,
-                                XmppConnectionService.class));
-                        finish();
+                (dialog, which) -> {
+                    if (xmppConnectionServiceBound) {
+                        unbindService(mConnection);
+                        xmppConnectionServiceBound = false;
                     }
+                    stopService(new Intent(XmppActivity.this,
+                            XmppConnectionService.class));
+                    finish();
                 });
         builder.setPositiveButton(getString(R.string.install),
-                new OnClickListener() {
-
-                    @Override
-                    public void onClick(DialogInterface dialog, int which) {
-                        Uri uri = Uri
-                                .parse("market://details?id=org.sufficientlysecure.keychain");
-                        Intent marketIntent = new Intent(Intent.ACTION_VIEW,
-                                uri);
-                        PackageManager manager = getApplicationContext()
-                                .getPackageManager();
-                        List<ResolveInfo> infos = manager
-                                .queryIntentActivities(marketIntent, 0);
-                        if (infos.size() > 0) {
-                            startActivity(marketIntent);
-                        } else {
-                            uri = Uri.parse("http://www.openkeychain.org/");
-                            Intent browserIntent = new Intent(
-                                    Intent.ACTION_VIEW, uri);
-                            startActivity(browserIntent);
-                        }
-                        finish();
+                (dialog, which) -> {
+                    Uri uri = Uri
+                            .parse("market://details?id=org.sufficientlysecure.keychain");
+                    Intent marketIntent = new Intent(Intent.ACTION_VIEW,
+                            uri);
+                    PackageManager manager = getApplicationContext()
+                            .getPackageManager();
+                    List<ResolveInfo> infos = manager
+                            .queryIntentActivities(marketIntent, 0);
+                    if (infos.size() > 0) {
+                        startActivity(marketIntent);
+                    } else {
+                        uri = Uri.parse("http://www.openkeychain.org/");
+                        Intent browserIntent = new Intent(
+                                Intent.ACTION_VIEW, uri);
+                        startActivity(browserIntent);
                     }
+                    finish();
                 });
         builder.create().show();
     }
@@ -649,18 +657,14 @@ public abstract class XmppActivity extends Activity {
     }
 
     protected void displayErrorDialog(final int errorCode) {
-        runOnUiThread(new Runnable() {
-
-            @Override
-            public void run() {
-                AlertDialog.Builder builder = new AlertDialog.Builder(
-                        XmppActivity.this);
-                builder.setIconAttribute(android.R.attr.alertDialogIcon);
-                builder.setTitle(getString(R.string.error));
-                builder.setMessage(errorCode);
-                builder.setNeutralButton(R.string.accept, null);
-                builder.create().show();
-            }
+        runOnUiThread(() -> {
+            Builder builder = new Builder(
+                    XmppActivity.this);
+            builder.setIconAttribute(android.R.attr.alertDialogIcon);
+            builder.setTitle(getString(R.string.error));
+            builder.setMessage(errorCode);
+            builder.setNeutralButton(R.string.accept, null);
+            builder.create().show();
         });
 
     }
@@ -675,15 +679,11 @@ public abstract class XmppActivity extends Activity {
         builder.setMessage(getString(R.string.not_in_roster));
         builder.setNegativeButton(getString(R.string.cancel), null);
         builder.setPositiveButton(getString(R.string.add_contact),
-                new DialogInterface.OnClickListener() {
-
-                    @Override
-                    public void onClick(DialogInterface dialog, int which) {
-                        final Jid jid = contact.getJid();
-                        Account account = contact.getAccount();
-                        Contact contact = account.getRoster().getContact(jid);
-                        xmppConnectionService.createContact(contact);
-                    }
+                (dialog, which) -> {
+                    final Jid jid = contact.getJid();
+                    Account account = contact.getAccount();
+                    Contact contact1 = account.getRoster().getContact(jid);
+                    xmppConnectionService.createContact(contact1);
                 });
         builder.create().show();
     }
@@ -694,16 +694,12 @@ public abstract class XmppActivity extends Activity {
         builder.setMessage(R.string.request_presence_updates);
         builder.setNegativeButton(R.string.cancel, null);
         builder.setPositiveButton(R.string.request_now,
-                new DialogInterface.OnClickListener() {
-
-                    @Override
-                    public void onClick(DialogInterface dialog, int which) {
-                        if (xmppConnectionServiceBound) {
-                            xmppConnectionService.sendPresencePacket(contact
-                                    .getAccount(), xmppConnectionService
-                                    .getPresenceGenerator()
-                                    .requestPresenceUpdatesFrom(contact));
-                        }
+                (dialog, which) -> {
+                    if (xmppConnectionServiceBound) {
+                        xmppConnectionService.sendPresencePacket(contact
+                                .getAccount(), xmppConnectionService
+                                .getPresenceGenerator()
+                                .requestPresenceUpdatesFrom(contact));
                     }
                 });
         builder.create().show();
@@ -715,14 +711,10 @@ public abstract class XmppActivity extends Activity {
         builder.setTitle(conversation.getContact().getJid().toString());
         builder.setMessage(R.string.without_mutual_presence_updates);
         builder.setNegativeButton(R.string.cancel, null);
-        builder.setPositiveButton(R.string.ignore, new OnClickListener() {
-
-            @Override
-            public void onClick(DialogInterface dialog, int which) {
-                conversation.setNextCounterpart(null);
-                if (listener != null) {
-                    listener.onPresenceSelected();
-                }
+        builder.setPositiveButton(R.string.ignore, (dialog, which) -> {
+            conversation.setNextCounterpart(null);
+            if (listener != null) {
+                listener.onPresenceSelected();
             }
         });
         builder.create().show();
@@ -763,20 +755,16 @@ public abstract class XmppActivity extends Activity {
         builder.setNegativeButton(R.string.cancel, null);
         final AlertDialog dialog = builder.create();
         dialog.show();
-        View.OnClickListener clickListener = new View.OnClickListener() {
-
-            @Override
-            public void onClick(View v) {
-                String value = editor.getText().toString();
-                if (!value.equals(previousValue) && value.trim().length() > 0) {
-                    String error = callback.onValueEdited(value);
-                    if (error != null) {
-                        editor.setError(error);
-                        return;
-                    }
+        View.OnClickListener clickListener = v -> {
+            String value = editor.getText().toString();
+            if (!value.equals(previousValue) && value.trim().length() > 0) {
+                String error = callback.onValueEdited(value);
+                if (error != null) {
+                    editor.setError(error);
+                    return;
                 }
-                dialog.dismiss();
             }
+            dialog.dismiss();
         };
         dialog.getButton(DialogInterface.BUTTON_POSITIVE).setOnClickListener(clickListener);
     }
@@ -900,26 +888,16 @@ public abstract class XmppActivity extends Activity {
         }
         builder.setSingleChoiceItems(readableIdentities,
                 selectedResource.get(),
-                new DialogInterface.OnClickListener() {
-
-                    @Override
-                    public void onClick(DialogInterface dialog, int which) {
-                        selectedResource.set(which);
-                    }
-                });
+                (dialog, which) -> selectedResource.set(which));
         builder.setNegativeButton(R.string.cancel, null);
-        builder.setPositiveButton(R.string.ok, new OnClickListener() {
-
-            @Override
-            public void onClick(DialogInterface dialog, int which) {
-                try {
-                    Jid next = Jid.fromParts(contact.getJid().getLocalpart(), contact.getJid().getDomainpart(), resourceArray[selectedResource.get()]);
-                    conversation.setNextCounterpart(next);
-                } catch (InvalidJidException e) {
-                    conversation.setNextCounterpart(null);
-                }
-                listener.onPresenceSelected();
+        builder.setPositiveButton(R.string.ok, (dialog, which) -> {
+            try {
+                Jid next = Jid.fromParts(contact.getJid().getLocalpart(), contact.getJid().getDomainpart(), resourceArray[selectedResource.get()]);
+                conversation.setNextCounterpart(next);
+            } catch (InvalidJidException e) {
+                conversation.setNextCounterpart(null);
             }
+            listener.onPresenceSelected();
         });
         builder.create().show();
     }
@@ -938,35 +916,6 @@ public abstract class XmppActivity extends Activity {
         }
     }
 
-
-    private UiCallback<Conversation> adhocCallback = new UiCallback<Conversation>() {
-        @Override
-        public void success(final Conversation conversation) {
-            runOnUiThread(new Runnable() {
-                @Override
-                public void run() {
-                    switchToConversation(conversation);
-                    hideToast();
-                }
-            });
-        }
-
-        @Override
-        public void error(final int errorCode, Conversation object) {
-            runOnUiThread(new Runnable() {
-                @Override
-                public void run() {
-                    replaceToast(getString(errorCode));
-                }
-            });
-        }
-
-        @Override
-        public void userInputRequried(PendingIntent pi, Conversation object) {
-
-        }
-    };
-
     public int getTertiaryTextColor() {
         return this.mTertiaryTextColor;
     }
@@ -1015,21 +964,6 @@ public abstract class XmppActivity extends Activity {
         return false;
     }
 
-    protected void registerNdefPushMessageCallback() {
-        NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(this);
-        if (nfcAdapter != null && nfcAdapter.isEnabled()) {
-            nfcAdapter.setNdefPushMessageCallback(new NfcAdapter.CreateNdefMessageCallback() {
-                @Override
-                public NdefMessage createNdefMessage(NfcEvent nfcEvent) {
-                    return new NdefMessage(new NdefRecord[]{
-                            NdefRecord.createUri(getShareableUri()),
-                            NdefRecord.createApplicationRecord("de.pixart.messenger")
-                    });
-                }
-            }, this);
-        }
-    }
-
     protected boolean neverCompressPictures() {
         return getPreferences().getString("picture_compression", getResources().getString(R.string.picture_compression)).equals("never");
     }
@@ -1038,13 +972,6 @@ public abstract class XmppActivity extends Activity {
         return getPreferences().getBoolean(SettingsActivity.MANUALLY_CHANGE_PRESENCE,  getResources().getBoolean(R.bool.manually_change_presence));
     }
 
-    protected void unregisterNdefPushMessageCallback() {
-        NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(this);
-        if (nfcAdapter != null && nfcAdapter.isEnabled()) {
-            nfcAdapter.setNdefPushMessageCallback(null, this);
-        }
-    }
-
     protected String getShareableUri() {
         return getShareableUri(false);
     }
@@ -1102,9 +1029,6 @@ public abstract class XmppActivity extends Activity {
     @Override
     public void onResume() {
         super.onResume();
-        if (this.getShareableUri() != null) {
-            this.registerNdefPushMessageCallback();
-        }
     }
 
     protected int findTheme() {
@@ -1120,7 +1044,6 @@ public abstract class XmppActivity extends Activity {
     @Override
     public void onPause() {
         super.onPause();
-        this.unregisterNdefPushMessageCallback();
     }
 
     protected void showQrCode() {
@@ -1149,6 +1072,46 @@ public abstract class XmppActivity extends Activity {
         }
     }
 
+    public AvatarService avatarService() {
+        return xmppConnectionService.getAvatarService();
+    }
+
+    public void loadBitmap(Message message, ImageView imageView) {
+        Bitmap bm;
+        try {
+            bm = xmppConnectionService.getFileBackend().getThumbnail(message, (int) (metrics.density * 288), true);
+        } catch (FileNotFoundException e) {
+            bm = null;
+        }
+        if (bm != null) {
+            cancelPotentialWork(message, imageView);
+            imageView.setImageBitmap(bm);
+            imageView.setBackgroundColor(0x00000000);
+        } else {
+            if (cancelPotentialWork(message, imageView)) {
+                imageView.setBackgroundColor(0xff333333);
+                imageView.setImageDrawable(null);
+                final BitmapWorkerTask task = new BitmapWorkerTask(this, imageView);
+                final AsyncDrawable asyncDrawable = new AsyncDrawable(
+                        getResources(), null, task);
+                imageView.setImageDrawable(asyncDrawable);
+                try {
+                    task.execute(message);
+                } catch (final RejectedExecutionException ignored) {
+                    ignored.printStackTrace();
+                }
+            }
+        }
+    }
+
+    protected interface OnValueEdited {
+        String onValueEdited(String value);
+    }
+
+    public interface OnPresenceSelected {
+        void onPresenceSelected();
+    }
+
     public static class ConferenceInvite {
         private String uuid;
         private List<Jid> jids = new ArrayList<>();
@@ -1192,16 +1155,14 @@ public abstract class XmppActivity extends Activity {
         }
     }
 
-    public AvatarService avatarService() {
-        return xmppConnectionService.getAvatarService();
-    }
-
-    class BitmapWorkerTask extends AsyncTask<Message, Void, Bitmap> {
+    static class BitmapWorkerTask extends AsyncTask<Message, Void, Bitmap> {
         private final WeakReference<ImageView> imageViewReference;
+        private final WeakReference<XmppActivity> activity;
         private Message message = null;
 
-        public BitmapWorkerTask(ImageView imageView) {
-            imageViewReference = new WeakReference<>(imageView);
+        private BitmapWorkerTask(XmppActivity activity, ImageView imageView) {
+            this.activity = new WeakReference<>(activity);
+            this.imageViewReference = new WeakReference<>(imageView);
         }
 
         @Override
@@ -1211,8 +1172,12 @@ public abstract class XmppActivity extends Activity {
             }
             message = params[0];
             try {
-                return xmppConnectionService.getFileBackend().getThumbnail(
-                        message, (int) (metrics.density * 288), false);
+                XmppActivity activity = this.activity.get();
+                if (activity != null && activity.xmppConnectionService != null) {
+                    return activity.xmppConnectionService.getFileBackend().getThumbnail(message, (int) (activity.metrics.density * 288), false);
+                } else {
+                    return null;
+                }
             } catch (FileNotFoundException e) {
                 return null;
             }
@@ -1230,71 +1195,17 @@ public abstract class XmppActivity extends Activity {
         }
     }
 
-    public void loadBitmap(Message message, ImageView imageView) {
-        Bitmap bm;
-        try {
-            bm = xmppConnectionService.getFileBackend().getThumbnail(message,
-                    (int) (metrics.density * 288), true);
-        } catch (FileNotFoundException e) {
-            bm = null;
-        }
-        if (bm != null) {
-            cancelPotentialWork(message, imageView);
-            imageView.setImageBitmap(bm);
-            imageView.setBackgroundColor(0x00000000);
-        } else {
-            if (cancelPotentialWork(message, imageView)) {
-                imageView.setBackgroundColor(0xff333333);
-                imageView.setImageDrawable(null);
-                final BitmapWorkerTask task = new BitmapWorkerTask(imageView);
-                final AsyncDrawable asyncDrawable = new AsyncDrawable(
-                        getResources(), null, task);
-                imageView.setImageDrawable(asyncDrawable);
-                try {
-                    task.executeOnExecutor(BitmapWorkerTask.THREAD_POOL_EXECUTOR, message);
-                } catch (final RejectedExecutionException ignored) {
-                    ignored.printStackTrace();
-                }
-            }
-        }
-    }
-
-    public static boolean cancelPotentialWork(Message message, ImageView imageView) {
-        final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
-
-        if (bitmapWorkerTask != null) {
-            final Message oldMessage = bitmapWorkerTask.message;
-            if (oldMessage == null || message != oldMessage) {
-                bitmapWorkerTask.cancel(true);
-            } else {
-                return false;
-            }
-        }
-        return true;
-    }
-
-    private static BitmapWorkerTask getBitmapWorkerTask(ImageView imageView) {
-        if (imageView != null) {
-            final Drawable drawable = imageView.getDrawable();
-            if (drawable instanceof AsyncDrawable) {
-                final AsyncDrawable asyncDrawable = (AsyncDrawable) drawable;
-                return asyncDrawable.getBitmapWorkerTask();
-            }
-        }
-        return null;
-    }
-
-    static class AsyncDrawable extends BitmapDrawable {
+    private static class AsyncDrawable extends BitmapDrawable {
         private final WeakReference<BitmapWorkerTask> bitmapWorkerTaskReference;
 
-        public AsyncDrawable(Resources res, Bitmap bitmap,
-                             BitmapWorkerTask bitmapWorkerTask) {
+        AsyncDrawable(Resources res, Bitmap bitmap,
+                      BitmapWorkerTask bitmapWorkerTask) {
             super(res, bitmap);
             bitmapWorkerTaskReference = new WeakReference<>(
                     bitmapWorkerTask);
         }
 
-        public BitmapWorkerTask getBitmapWorkerTask() {
+        BitmapWorkerTask getBitmapWorkerTask() {
             return bitmapWorkerTaskReference.get();
         }
     }