Improve key profile adapter notification code

app/src/main/java/me/impy/aegis/KeyProfileAdapter.java

@@ -8,7 +8,6 @@ import android.view.ViewGroup;
 
 import java.util.ArrayList;
 import java.util.Collections;
-import java.util.List;
 
 import me.impy.aegis.helpers.ItemTouchHelperAdapter;
 
@@ -25,12 +24,13 @@ public class KeyProfileAdapter extends RecyclerView.Adapter<KeyProfileHolder> im
 
     public void addKey(KeyProfile profile) {
         _keyProfiles.add(profile);
-        notifyDataSetChanged();
-    }
 
-    public void addKeys(List<KeyProfile> profiles) {
-        _keyProfiles.addAll(profiles);
-        notifyDataSetChanged();
+        int position = getItemCount() - 1;
+        if (position == 0) {
+            notifyDataSetChanged();
+        } else {
+            notifyItemInserted(position);
+        }
     }
 
     public void removeKey(KeyProfile profile) {

app/src/main/java/me/impy/aegis/KeyProfileHolder.java

@@ -33,8 +33,7 @@ public class KeyProfileHolder extends RecyclerView.ViewHolder {
     }
 
     public void setData(KeyProfile profile) {
-        _keyProfile = profile;
-        if (_keyProfile == null) {
+        if ((_keyProfile = profile) == null) {
             return;
         }
 

app/src/main/java/me/impy/aegis/MainActivity.java

@@ -31,7 +31,6 @@ import java.io.ByteArrayOutputStream;
 import java.io.FileNotFoundException;
 import java.io.InputStream;
 import java.lang.reflect.UndeclaredThrowableException;
-import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
@@ -486,18 +485,15 @@ public class MainActivity extends AppCompatActivity implements KeyProfileAdapter
     private void loadKeyProfiles() {
         updateLockIcon();
 
-        List<KeyProfile> profiles = new ArrayList<>();
         try {
             for (DatabaseEntry entry : _db.getKeys()) {
-                profiles.add(new KeyProfile(entry));
+                _keyProfileAdapter.addKey(new KeyProfile(entry));
             }
         } catch (Exception e) {
             e.printStackTrace();
             Toast.makeText(this, "An error occurred while trying to load database entries", Toast.LENGTH_SHORT).show();
             return;
         }
-
-        _keyProfileAdapter.addKeys(profiles);
     }
 
     private void updateLockIcon() {