diff --git a/app/src/main/java/org/tasks/dialogs/AddAttachmentDialog.java b/app/src/main/java/org/tasks/dialogs/AddAttachmentDialog.java
deleted file mode 100644
index 1844c77f3..000000000
--- a/app/src/main/java/org/tasks/dialogs/AddAttachmentDialog.java
+++ /dev/null
@@ -1,85 +0,0 @@
-package org.tasks.dialogs;
-
-import static org.tasks.dialogs.RecordAudioDialog.newRecordAudioDialog;
-import static org.tasks.files.FileHelper.newFilePickerIntent;
-
-import android.app.Activity;
-import android.app.Dialog;
-import android.content.Intent;
-import android.os.Bundle;
-import android.provider.MediaStore.Images.Media;
-import androidx.annotation.NonNull;
-import androidx.fragment.app.DialogFragment;
-import com.todoroo.astrid.files.FilesControlSet;
-import dagger.hilt.android.AndroidEntryPoint;
-import java.util.ArrayList;
-import java.util.List;
-import javax.inject.Inject;
-import org.tasks.R;
-import org.tasks.activities.CameraActivity;
-import org.tasks.preferences.Device;
-
-@AndroidEntryPoint
-public class AddAttachmentDialog extends DialogFragment {
-
-  public static final int REQUEST_CAMERA = 12120;
-  public static final int REQUEST_GALLERY = 12121;
-  public static final int REQUEST_STORAGE = 12122;
-  public static final int REQUEST_AUDIO = 12123;
-  private static final String FRAG_TAG_RECORD_AUDIO = "frag_tag_record_audio";
-  @Inject Activity context;
-  @Inject DialogBuilder dialogBuilder;
-  @Inject Device device;
-
-  public static AddAttachmentDialog newAddAttachmentDialog(FilesControlSet target) {
-    AddAttachmentDialog dialog = new AddAttachmentDialog();
-    dialog.setTargetFragment(target, 0);
-    return dialog;
-  }
-
-  @NonNull
-  @Override
-  public Dialog onCreateDialog(Bundle savedInstanceState) {
-    List<String> entries = new ArrayList<>();
-    final List<Runnable> actions = new ArrayList<>();
-    if (device.hasCamera()) {
-      entries.add(getString(R.string.take_a_picture));
-      actions.add(this::takePicture);
-    }
-    entries.add(getString(R.string.premium_record_audio));
-    actions.add(this::recordNote);
-    if (device.hasGallery()) {
-      entries.add(getString(R.string.pick_from_gallery));
-      actions.add(this::pickFromGallery);
-    }
-    entries.add(getString(R.string.pick_from_storage));
-    actions.add(this::pickFromStorage);
-    return dialogBuilder
-        .newDialog()
-        .setItems(entries, (dialog, which) -> actions.get(which).run())
-        .show();
-  }
-
-  private void takePicture() {
-    getTargetFragment()
-        .startActivityForResult(new Intent(context, CameraActivity.class), REQUEST_CAMERA);
-  }
-
-  private void recordNote() {
-    newRecordAudioDialog((FilesControlSet) getTargetFragment(), REQUEST_AUDIO)
-        .show(getParentFragmentManager(), FRAG_TAG_RECORD_AUDIO);
-  }
-
-  private void pickFromGallery() {
-    Intent intent = new Intent(Intent.ACTION_PICK);
-    intent.setDataAndType(Media.EXTERNAL_CONTENT_URI, "image/*");
-    if (intent.resolveActivity(context.getPackageManager()) != null) {
-      getTargetFragment().startActivityForResult(intent, REQUEST_GALLERY);
-    }
-  }
-
-  private void pickFromStorage() {
-    getTargetFragment()
-        .startActivityForResult(newFilePickerIntent(getActivity(), null), REQUEST_STORAGE);
-  }
-}
diff --git a/app/src/main/java/org/tasks/dialogs/AddAttachmentDialog.kt b/app/src/main/java/org/tasks/dialogs/AddAttachmentDialog.kt
new file mode 100644
index 000000000..915a71248
--- /dev/null
+++ b/app/src/main/java/org/tasks/dialogs/AddAttachmentDialog.kt
@@ -0,0 +1,82 @@
+package org.tasks.dialogs
+
+import android.app.Activity
+import android.app.Dialog
+import android.content.Intent
+import android.os.Bundle
+import android.provider.MediaStore
+import androidx.fragment.app.DialogFragment
+import com.todoroo.astrid.files.FilesControlSet
+import dagger.hilt.android.AndroidEntryPoint
+import org.tasks.R
+import org.tasks.activities.CameraActivity
+import org.tasks.files.FileHelper.newFilePickerIntent
+import org.tasks.preferences.Device
+import java.util.*
+import javax.inject.Inject
+
+@AndroidEntryPoint
+class AddAttachmentDialog : DialogFragment() {
+    @Inject lateinit var context: Activity
+    @Inject lateinit var dialogBuilder: DialogBuilder
+    @Inject lateinit var device: Device
+
+    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
+        val entries: MutableList<String> = ArrayList()
+        val actions: MutableList<Runnable> = ArrayList()
+        if (device.hasCamera()) {
+            entries.add(getString(R.string.take_a_picture))
+            actions.add(Runnable { takePicture() })
+        }
+        entries.add(getString(R.string.premium_record_audio))
+        actions.add(Runnable { recordNote() })
+        if (device.hasGallery()) {
+            entries.add(getString(R.string.pick_from_gallery))
+            actions.add(Runnable { pickFromGallery() })
+        }
+        entries.add(getString(R.string.pick_from_storage))
+        actions.add(Runnable { pickFromStorage() })
+        return dialogBuilder
+                .newDialog()
+                .setItems(entries) { _, which -> actions[which].run() }
+                .show()
+    }
+
+    private fun takePicture() {
+        targetFragment?.startActivityForResult(
+                Intent(context, CameraActivity::class.java),
+                REQUEST_CAMERA
+        )
+    }
+
+    private fun recordNote() {
+        RecordAudioDialog.newRecordAudioDialog(targetFragment as FilesControlSet?, REQUEST_AUDIO)
+                .show(parentFragmentManager, FRAG_TAG_RECORD_AUDIO)
+    }
+
+    private fun pickFromGallery() {
+        val intent = Intent(Intent.ACTION_PICK)
+        intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*")
+        if (intent.resolveActivity(context.packageManager) != null) {
+            targetFragment?.startActivityForResult(intent, REQUEST_GALLERY)
+        }
+    }
+
+    private fun pickFromStorage() {
+        targetFragment?.startActivityForResult(newFilePickerIntent(activity, null), REQUEST_STORAGE)
+    }
+
+    companion object {
+        const val REQUEST_CAMERA = 12120
+        const val REQUEST_GALLERY = 12121
+        const val REQUEST_STORAGE = 12122
+        const val REQUEST_AUDIO = 12123
+        private const val FRAG_TAG_RECORD_AUDIO = "frag_tag_record_audio"
+
+        fun newAddAttachmentDialog(target: FilesControlSet?): AddAttachmentDialog {
+            val dialog = AddAttachmentDialog()
+            dialog.setTargetFragment(target, 0)
+            return dialog
+        }
+    }
+}
\ No newline at end of file