diff --git a/app/src/main/java/org/ntlab/amaryllis/client/fragment/ListFragment.java b/app/src/main/java/org/ntlab/amaryllis/client/fragment/ListFragment.java
index efa454c..552fc74 100644
--- a/app/src/main/java/org/ntlab/amaryllis/client/fragment/ListFragment.java
+++ b/app/src/main/java/org/ntlab/amaryllis/client/fragment/ListFragment.java
@@ -4,6 +4,7 @@
 import android.os.Bundle;
 
 import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentManager;
 
 import android.view.LayoutInflater;
 import android.view.View;
@@ -71,7 +72,7 @@
 }
 
 // 呼び出し元のFragment
-public class MyFragment extends Fragment implements MyDialogFragment.MyDialog.OnOkClickListener {
+class MyFragment extends Fragment implements MyDialogFragment.MyDialog.OnOkClickListener {
 
     // ダイアログを表示するボタン
     private Button mDispDialog;
@@ -84,10 +85,10 @@
 
         mSelectedText = (TextView) v.findViewById(R.id.textSelected);
         mDispDialog = (Button) v.findViewById(R.id.btnDispDialog);
-        mDispDialog.setOnClickListener(new DialogInterface.OnClickListener() {
+        mDispDialog.setOnClickListener(new View.OnClickListener() {
             public void onClick(View v) {
                 FragmentManager manager = getActivity().getSupportFragmentManager();
-                MyDialog dialog = MyDialog.newInstance();
+                MyDialogFragment.MyDialog dialog = MyDialogFragment.MyDialog.newInstance();
                 dialog.setTargetFragment(MyFragment.this, 0); // ★★★
                 dialog.show(manager, "MyDialog");
             }