title: database folder is missing in device file explorer in android studio
body: <p>I have created a sqlite database and table in android studio, but the sqlite database folder is missing in the device's file explorer.
  I have written the following code in the <code>databasehelper.java</code> class</p>
  
  <pre><code>@Override
  public void onCreate(SQLiteDatabase db) {
     db.execSQL("create table "+TABLE_NAME+"(sr INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, datetime TEXT, location TEXT, odometer INTEGER, speed INTEGER, GPS TEXT, int.volt INTEGER, ext.volt INTEGER )");
  }   
  </code></pre>