diff --git a/fints4javaAndroidApp/src/main/java/net/dankito/banking/fints4java/android/MainActivity.kt b/fints4javaAndroidApp/src/main/java/net/dankito/banking/fints4java/android/MainActivity.kt
index b37a5b21..f5d48958 100644
--- a/fints4javaAndroidApp/src/main/java/net/dankito/banking/fints4java/android/MainActivity.kt
+++ b/fints4javaAndroidApp/src/main/java/net/dankito/banking/fints4java/android/MainActivity.kt
@@ -10,12 +10,26 @@ import android.view.Menu
 import androidx.navigation.findNavController
 import net.dankito.banking.fints4java.android.ui.MainWindowPresenter
 import net.dankito.banking.fints4java.android.ui.dialogs.AddAccountDialog
+import net.dankito.fints.FinTsClientCallback
+import net.dankito.fints.model.TanChallenge
+import net.dankito.fints.model.TanProcedure
 
 class MainActivity : AppCompatActivity() {
 
 //    private lateinit var appBarConfiguration: AppBarConfiguration
 
-    val presenter = MainWindowPresenter()
+    val presenter = MainWindowPresenter(callback = object : FinTsClientCallback {
+
+        override fun askUserForTanProcedure(supportedTanProcedures: List<TanProcedure>): TanProcedure? {
+            // TODO: show dialog and ask user
+            return supportedTanProcedures.first()
+        }
+
+        override fun enterTan(tanChallenge: TanChallenge): String? {
+            return null
+        }
+
+    })
 
 
     override fun onCreate(savedInstanceState: Bundle?) {
diff --git a/fints4javaAndroidApp/src/main/java/net/dankito/banking/fints4java/android/ui/MainWindowPresenter.kt b/fints4javaAndroidApp/src/main/java/net/dankito/banking/fints4java/android/ui/MainWindowPresenter.kt
index 4f9e75ba..f6860d6e 100644
--- a/fints4javaAndroidApp/src/main/java/net/dankito/banking/fints4java/android/ui/MainWindowPresenter.kt
+++ b/fints4javaAndroidApp/src/main/java/net/dankito/banking/fints4java/android/ui/MainWindowPresenter.kt
@@ -4,7 +4,10 @@ import net.dankito.banking.fints4java.android.Base64ServiceAndroid
 import net.dankito.fints.FinTsClient
 import net.dankito.fints.FinTsClientCallback
 import net.dankito.fints.banks.BankFinder
-import net.dankito.fints.model.*
+import net.dankito.fints.model.BankData
+import net.dankito.fints.model.BankInfo
+import net.dankito.fints.model.CustomerData
+import net.dankito.fints.model.GetTransactionsParameter
 import net.dankito.fints.model.mapper.BankDataMapper
 import net.dankito.fints.response.client.FinTsClientResponse
 import net.dankito.fints.response.client.GetTransactionsResponse
@@ -12,20 +15,7 @@ import net.dankito.utils.IThreadPool
 import net.dankito.utils.ThreadPool
 
 
-open class MainWindowPresenter {
-
-    protected val callback = object : FinTsClientCallback {
-
-        override fun askUserForTanProcedure(supportedTanProcedures: List<TanProcedure>): TanProcedure? {
-            // TODO: show dialog and ask user
-            return supportedTanProcedures.first()
-        }
-
-        override fun enterTan(tanChallenge: TanChallenge): String? {
-            return null
-        }
-
-    }
+open class MainWindowPresenter(callback: FinTsClientCallback) {
 
     protected val finTsClient = FinTsClient(callback, Base64ServiceAndroid())