fix wrong condition of local note

app/src/main/java/org/houxg/leamonax/model/Note.java

@@ -1,5 +1,7 @@
 package org.houxg.leamonax.model;
 
+import android.text.TextUtils;
+
 import com.elvishew.xlog.XLog;
 import com.google.gson.annotations.SerializedName;
 import com.raizlabs.android.dbflow.annotation.Column;
@@ -193,6 +195,14 @@ public class Note extends BaseModel implements Serializable {
         return tagData;
     }
 
+    public boolean isTotalEmpty() {
+        return TextUtils.isEmpty(title) && TextUtils.isEmpty(content);
+    }
+
+    public boolean isLocalNote() {
+        return TextUtils.isEmpty(noteId);
+    }
+
     public void updateTags() {
         if (CollectionUtils.isEmpty(tagData)) {
             tags = "";

app/src/main/java/org/houxg/leamonax/service/NoteService.java

@@ -204,7 +204,7 @@ public class NoteService {
         Map<String, RequestBody> requestBodyMap = generateCommonBodyMap(modifiedNote);
         List<MultipartBody.Part> fileBodies = handleFileBodies(modifiedNote, requestBodyMap);
         Call<Note> call;
-        if (modifiedNote.getUsn() == 0) {
+        if (modifiedNote.isLocalNote()) {
             call = ApiProvider.getInstance().getNoteApi().add(requestBodyMap, fileBodies);
         } else {
             Note remoteNote = RetrofitUtils.excuteWithException(getNoteByServerId(modifiedNote.getNoteId()));