diff --git a/app/src/main/java/org/mosad/teapod/ui/account/AccountFragment.kt b/app/src/main/java/org/mosad/teapod/ui/account/AccountFragment.kt
index 8cc94ae..83abe09 100644
--- a/app/src/main/java/org/mosad/teapod/ui/account/AccountFragment.kt
+++ b/app/src/main/java/org/mosad/teapod/ui/account/AccountFragment.kt
@@ -6,7 +6,7 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.fragment.app.Fragment
-import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import com.afollestad.materialdialogs.MaterialDialog
 import de.psdev.licensesdialog.LicensesDialog
 import kotlinx.android.synthetic.main.fragment_account.*
 import org.mosad.teapod.BuildConfig
@@ -36,9 +36,9 @@ class AccountFragment : Fragment() {
         }
 
         linear_about.setOnClickListener {
-            MaterialAlertDialogBuilder(requireContext())
-                .setTitle(R.string.info_about)
-                .setMessage(R.string.info_about_dialog)
+            MaterialDialog(requireContext())
+                .title(R.string.info_about)
+                .message(R.string.info_about_dialog)
                 .show()
         }
 
diff --git a/app/src/main/java/org/mosad/teapod/util/adapter/MediaItemAdapter.kt b/app/src/main/java/org/mosad/teapod/util/adapter/MediaItemAdapter.kt
index 14f9043..00753e1 100644
--- a/app/src/main/java/org/mosad/teapod/util/adapter/MediaItemAdapter.kt
+++ b/app/src/main/java/org/mosad/teapod/util/adapter/MediaItemAdapter.kt
@@ -13,7 +13,7 @@ import java.util.*
 class MediaItemAdapter(val context: Context, private val originalMedia: ArrayList<Media>) : BaseAdapter(), Filterable {
 
     private var filteredMedia = originalMedia.map { it.copy() }
-    private val customFilter = CustomFilter()
+    private val filer = MediaFilter()
 
     override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
         val view = convertView ?: LayoutInflater.from(context).inflate(R.layout.item_media, parent, false)
@@ -28,7 +28,7 @@ class MediaItemAdapter(val context: Context, private val originalMedia: ArrayLis
     }
 
     override fun getFilter(): Filter {
-        return customFilter
+        return filer
     }
 
     override fun getCount(): Int {
@@ -43,7 +43,8 @@ class MediaItemAdapter(val context: Context, private val originalMedia: ArrayLis
         return position.toLong()
     }
 
-    inner class CustomFilter : Filter() {
+
+    inner class MediaFilter : Filter() {
         override fun performFiltering(constraint: CharSequence?): FilterResults {
             val filterTerm = constraint.toString().toLowerCase(Locale.ROOT)
             val results = FilterResults()
@@ -62,6 +63,10 @@ class MediaItemAdapter(val context: Context, private val originalMedia: ArrayLis
             return results
         }
 
+        @Suppress("unchecked_cast")
+        /**
+         * suppressing unchecked cast is safe, since we only use Media
+         */
         override fun publishResults(constraint: CharSequence?, results: FilterResults?) {
             filteredMedia = results?.values as ArrayList<Media>
             notifyDataSetChanged()
diff --git a/app/src/main/res/values-de-rDE/strings.xml b/app/src/main/res/values-de-rDE/strings.xml
index 9b59b1d..f41c068 100644
--- a/app/src/main/res/values-de-rDE/strings.xml
+++ b/app/src/main/res/values-de-rDE/strings.xml
@@ -24,7 +24,7 @@
 
     <!-- dialogs -->
     <string name="save">speichern</string>
-    <string name="cancel">\@android:string/cancel</string>
+    <string name="cancel">@android:string/cancel</string>
 
     <!-- etc -->
     <string name="login">Login</string>