Android Room - Get the id of new inserted row with auto-generate

Based on the documentation here (below the code snippet)

A method annotated with the @Insert annotation can return:

• long for single insert operation
• long[] or Long[] or List<Long> for multiple insert operations
• void if you don't care about the inserted id(s)

@Insert function can return void, long, long[] or List<Long>. Please try this.

 @Insert(onConflict = OnConflictStrategy.REPLACE)
  long insert(User user);

 // Insert multiple items
 @Insert(onConflict = OnConflictStrategy.REPLACE)
  long[] insert(User... user);