diff --git a/library/src/main/java/com/cottacush/android/hiddencam/HiddenCam.kt b/library/src/main/java/com/cottacush/android/hiddencam/HiddenCam.kt
index 262cb36..3d2760e 100644
--- a/library/src/main/java/com/cottacush/android/hiddencam/HiddenCam.kt
+++ b/library/src/main/java/com/cottacush/android/hiddencam/HiddenCam.kt
@@ -22,7 +22,7 @@ import com.cottacush.android.hiddencam.CaptureTimeFrequency.OneShot
 import com.cottacush.android.hiddencam.CaptureTimeFrequency.Recurring
 import java.io.File
 
-class HiddenCam(
+class HiddenCam @JvmOverloads constructor(
     context: Context,
     private val baseFileDirectory: File,
     private val imageCapturedListener: OnImageCapturedListener,
diff --git a/sample/src/main/java/com/cottacush/android/hiddencam/MainActivity.kt b/sample/src/main/java/com/cottacush/android/hiddencam/MainActivity.kt
index 87ede2d..11f0ebf 100644
--- a/sample/src/main/java/com/cottacush/android/hiddencam/MainActivity.kt
+++ b/sample/src/main/java/com/cottacush/android/hiddencam/MainActivity.kt
@@ -20,6 +20,7 @@ import androidx.appcompat.app.AppCompatActivity
 import androidx.navigation.NavController
 import androidx.navigation.findNavController
 import androidx.navigation.ui.AppBarConfiguration
+import androidx.navigation.ui.NavigationUI
 import com.cottacush.android.R
 import kotlinx.android.synthetic.main.activity_main.*
 
@@ -48,4 +49,8 @@ class MainActivity : AppCompatActivity() {
         setContentView(R.layout.activity_main)
         setUpNavigation()
     }
+
+    override fun onSupportNavigateUp(): Boolean {
+        return NavigationUI.navigateUp(navController, appBarConfiguration)
+    }
 }
diff --git a/sample/src/main/java/com/cottacush/android/hiddencam/oneshot/OneShotFragment.kt b/sample/src/main/java/com/cottacush/android/hiddencam/oneshot/OneShotFragment.kt
index 0dc93e3..f900256 100644
--- a/sample/src/main/java/com/cottacush/android/hiddencam/oneshot/OneShotFragment.kt
+++ b/sample/src/main/java/com/cottacush/android/hiddencam/oneshot/OneShotFragment.kt
@@ -53,7 +53,7 @@ class OneShotFragment : Fragment(), OnImageCapturedListener {
         }
         hiddenCam = HiddenCam(
             mainActivity, baseStorageFolder, this,
-            targetResolution = Size(1920, 1080)
+            targetResolution = Size(1080, 1920)
         )
 
         captureButton.setOnClickListener {