SQLite数据库不更新值

Question

My database is not updating it's values for some reason. According to the tutorials I've been following, I really don't know what could be wrong, here is the code on the databaseAdapter:

  public boolean updatePhysicalActivity(String tableName, String recommendation, String activityDate, String activityDistance, String activityTime, String monitor, String activityVelocity ){
     ContentValues args = new ContentValues();
     args.put(RECOMMENDATION,recommendation);
     args.put(ACTIVITY_DATE, activityDate);
     args.put(ACTIVITY_DISTANCE, activityDistance);
     args.put(ACTIVITY_TIME, activityTime);
     args.put(ACTIVITY_VELOCITY, activityVelocity);
     args.put(MONITOR, monitor);
     return db.update(tableName, args, ACTIVITY_DATE + "=" + activityDate, null) > 0;
}

I have a few different tables that use the same columns, which is why I name the table when calling the update method. I already debugged the program so I know the values are being passed on in this function, but when I check it later, nothing happens. Also, I want to update the table that has the same ACTIVITY_DATE value, which is why I use ACTIVITY_DATE instead of KEYID (which was used in the tutorial). Could that be the issue? If so, how do I fix it?

Thank you!

Answer 1

The update method has the following signature: update(table, values, whereClause, whereArgs)

The proper way would be to do:

whereClause:

ACTIVITY_DATE+"=?"

whereArgs:

new String[]{activityDate}

Answer 2

You have omit the single quotations in this line:

return db.update(tableName, args, ACTIVITY_DATE + "=" + activityDate, null) > 0;

change it to:

return db.update(tableName, args, ACTIVITY_DATE + "='" + activityDate +"'", null) > 0;