diff --git a/twidere/src/main/kotlin/org/mariotaku/twidere/activity/ComposeActivity.kt b/twidere/src/main/kotlin/org/mariotaku/twidere/activity/ComposeActivity.kt
index 90495df97..00017186c 100644
--- a/twidere/src/main/kotlin/org/mariotaku/twidere/activity/ComposeActivity.kt
+++ b/twidere/src/main/kotlin/org/mariotaku/twidere/activity/ComposeActivity.kt
@@ -1372,9 +1372,9 @@ class ComposeActivity : BaseActivity(), OnMenuItemClickListener, OnClickListener
                 locationLabel.text = ParcelableLocationUtils.getHumanReadableString(location, 3)
             } else {
                 if (locationLabel.tag == null || location != recentLocation) {
-                    val task = DisplayPlaceNameTask(this)
+                    val task = DisplayPlaceNameTask()
                     task.params = location
-                    task.callback = locationLabel
+                    task.callback = this
                     TaskStarter.execute(task)
                 }
             }
@@ -1796,13 +1796,13 @@ class ComposeActivity : BaseActivity(), OnMenuItemClickListener, OnClickListener
         }
     }
 
-    internal class DisplayPlaceNameTask(
-            private val context: ComposeActivity
-    ) : AbstractTask<ParcelableLocation, List<Address>, TextView>() {
+    internal class DisplayPlaceNameTask : AbstractTask<ParcelableLocation, List<Address>,
+            ComposeActivity>() {
 
         override fun doLongOperation(location: ParcelableLocation): List<Address>? {
-            val gcd = Geocoder(context, Locale.getDefault())
             try {
+                val activity = callback ?: throw IOException("Interrupted")
+                val gcd = Geocoder(activity, Locale.getDefault())
                 return gcd.getFromLocation(location.latitude, location.longitude, 1)
             } catch (e: IOException) {
                 return null
@@ -1812,9 +1812,10 @@ class ComposeActivity : BaseActivity(), OnMenuItemClickListener, OnClickListener
 
         override fun beforeExecute() {
             val location = params
-            val textView = callback ?: return
+            val activity = callback ?: return
+            val textView = activity.locationLabel ?: return
 
-            val preferences = context.preferences
+            val preferences = activity.preferences
             val attachLocation = preferences[attachLocationKey]
             val attachPreciseLocation = preferences[attachPreciseLocationKey]
             if (attachLocation) {
@@ -1836,9 +1837,10 @@ class ComposeActivity : BaseActivity(), OnMenuItemClickListener, OnClickListener
             }
         }
 
-        override fun afterExecute(textView: TextView?, addresses: List<Address>?) {
-            textView!!
-            val preferences = context.preferences
+        override fun afterExecute(activity: ComposeActivity?, addresses: List<Address>?) {
+            if (activity == null) return
+            val textView = activity.locationLabel ?: return
+            val preferences = activity.preferences
             val attachLocation = preferences[attachLocationKey]
             val attachPreciseLocation = preferences[attachPreciseLocationKey]
             if (attachLocation) {
diff --git a/twidere/src/main/kotlin/org/mariotaku/twidere/fragment/media/ImagePageFragment.kt b/twidere/src/main/kotlin/org/mariotaku/twidere/fragment/media/ImagePageFragment.kt
index 0885a8841..773a52907 100644
--- a/twidere/src/main/kotlin/org/mariotaku/twidere/fragment/media/ImagePageFragment.kt
+++ b/twidere/src/main/kotlin/org/mariotaku/twidere/fragment/media/ImagePageFragment.kt
@@ -39,6 +39,7 @@ import org.mariotaku.twidere.util.TwidereMathUtils
 import org.mariotaku.twidere.util.UriUtils
 import org.mariotaku.twidere.util.media.MediaExtra
 import java.io.IOException
+import java.lang.ref.WeakReference
 
 class ImagePageFragment : SubsampleImageViewerFragment() {
 
@@ -145,9 +146,12 @@ class ImagePageFragment : SubsampleImageViewerFragment() {
 
     internal class SizedResult(cacheUri: Uri, val width: Int, val height: Int) : CacheDownloadLoader.Result(cacheUri, null)
 
-    internal class SizedResultCreator(private val context: Context) : CacheDownloadLoader.ResultCreator {
+    internal class SizedResultCreator(context: Context) : CacheDownloadLoader.ResultCreator {
+
+        private val weakContext = WeakReference(context)
 
         override fun create(uri: Uri): CacheDownloadLoader.Result {
+            val context = weakContext.get() ?: return CacheDownloadLoader.Result.getInstance(InterruptedException())
             val o = BitmapFactory.Options()
             o.inJustDecodeBounds = true
             try {
diff --git a/twidere/src/main/kotlin/org/mariotaku/twidere/loader/AccountDetailsLoader.kt b/twidere/src/main/kotlin/org/mariotaku/twidere/loader/AccountDetailsLoader.kt
index 68e3a6feb..6298597de 100644
--- a/twidere/src/main/kotlin/org/mariotaku/twidere/loader/AccountDetailsLoader.kt
+++ b/twidere/src/main/kotlin/org/mariotaku/twidere/loader/AccountDetailsLoader.kt
@@ -8,6 +8,7 @@ import org.mariotaku.ktextension.addOnAccountsUpdatedListenerSafe
 import org.mariotaku.ktextension.removeOnAccountsUpdatedListenerSafe
 import org.mariotaku.twidere.model.AccountDetails
 import org.mariotaku.twidere.model.util.AccountUtils
+import java.lang.ref.WeakReference
 
 /**
  * Created by mariotaku on 2016/12/4.
@@ -42,8 +43,9 @@ class AccountDetailsLoader(
     }
 
     override fun onStartLoading() {
+        val weakThis = WeakReference(this)
         accountUpdateListener = OnAccountsUpdateListener {
-            onContentChanged()
+            weakThis.get()?.onContentChanged()
         }
         if (takeContentChanged()) {
             forceLoad()