title: Why the database inserts the same information for 2 lines each time?
body: <p>in android studio, I want to insert the data into the SQliteDatabase for one line each time. But  there is a problem for my database that each time I add the information, the information store for 2 line.</p>
  
  <p><strong>Screenshot:</strong></p>
  
  <p><img src="https://i.stack.imgur.com/HKkhQ.png"></p>