Make Dialogs Persist

app/src/main/java/com/thebrokenrail/mtudining/activity/menu/ItemDialog.java

@@ -1,11 +1,17 @@
 package com.thebrokenrail.mtudining.activity.menu;
 
+import android.app.Dialog;
 import android.content.Context;
 import android.graphics.Typeface;
+import android.os.Bundle;
 import android.text.SpannableStringBuilder;
 import android.text.Spanned;
 import android.text.style.StyleSpan;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.DialogFragment;
+
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import com.thebrokenrail.mtudining.R;
 import com.thebrokenrail.mtudining.api.method.PeriodDetail;
@@ -14,6 +20,35 @@ import com.thebrokenrail.mtudining.api.method.PeriodDetail;
  * Dialog for a food item.
  */
 public class ItemDialog {
+    /**
+     * Fragment for dialog.
+     */
+    public static class Fragment extends DialogFragment {
+        // Required Public Default Constructor
+        public Fragment() {
+        }
+
+        private Fragment(CharSequence title, CharSequence message) {
+            Bundle arguments = new Bundle();
+            arguments.putCharSequence("title", title);
+            arguments.putCharSequence("message", message);
+            setArguments(arguments);
+        }
+
+        @NonNull
+        @Override
+        public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
+            // Create Material Dialog
+            Bundle arguments = getArguments();
+            assert arguments != null;
+            return new MaterialAlertDialogBuilder(requireActivity())
+                .setTitle(arguments.getCharSequence("title"))
+                .setMessage(arguments.getCharSequence("message"))
+                .setPositiveButton(R.string.ok, null)
+                .create();
+        }
+    }
+
     /**
      * Show dialog.
      * @param context The context
@@ -29,20 +64,21 @@ public class ItemDialog {
         message.append(item.portion);
         message.append('\n');
         message.append(context.getString(R.string.ingredients), new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+        if (item.ingredients != null) {
             message.append(item.ingredients);
+        }
         message.append('\n');
         message.append(context.getString(R.string.nutrients), new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
         for (PeriodDetail.Response.Menu.PeriodData.MenuCategory.MenuItem.Nutrient nutrient : item.nutrients) {
             message.append('\n');
             message.append("• " + nutrient.name + ": ", new StyleSpan(Typeface.BOLD), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+            if (nutrient.value != null) {
                 message.append(nutrient.value);
             }
+        }
 
         // Show
-        new MaterialAlertDialogBuilder(context)
+        Fragment fragment = new Fragment(item.name, message);
-            .setTitle(item.name)
+        fragment.show(((MenuActivity) context).getSupportFragmentManager(), "item_" + item.name.hashCode());
-            .setMessage(message)
-            .setPositiveButton(R.string.ok, (dialog, which) -> {})
-            .show();
     }
 }