Adds confirmation when going up from the edit monster screen to save, cancel, or discard changes.

Android/app/src/main/java/com/majinnaibu/monstercards/data/MonsterDAO.java

@@ -4,6 +4,7 @@ package com.majinnaibu.monstercards.data;
 import androidx.room.Dao;
 import androidx.room.Delete;
 import androidx.room.Insert;
+import androidx.room.OnConflictStrategy;
 import androidx.room.Query;
 
 import com.majinnaibu.monstercards.models.Monster;
@@ -30,6 +31,9 @@ public interface MonsterDAO {
     @Insert
     Completable insertAll(Monster... monsters);
 
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    Completable save(Monster... monsters);
+
     @Delete
     Completable delete(Monster monster);
 }

Android/app/src/main/java/com/majinnaibu/monstercards/data/MonsterRepository.java

@@ -63,4 +63,9 @@ public class MonsterRepository {
         return result;
     }
 
+    public Completable saveMonster(Monster monster) {
+        Completable result = m_db.monsterDAO().save(monster);
+        result.subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread());
+        return result;
+    }
 }