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why model class is needed if there is a cursor in android?


why model class is needed if there is a cursor in android?

By : ruthwik naidu
Date : November 21 2020, 04:03 PM
will help you It really all depends in your needs, definitely cursor can properly address the holding information issue you might have, and its even better because cursors do not load information until is actually requested, however, there's a flexibility in Model Classes that Cursors will not allow, for example, adding/removing data fields on the fly, with a good model implementation you might be able to change easily during runtime your model properties, cursors would require a "requery" functionality and most important in some cases would be impossible because the column might not even exist, also models are less error prone, I've seen a lot of issues caused because the Cursor was closed accidentally when it was not supposed to, either way I'm not saying one is better than the other, I'm just saying it really all depends on your needs.
Hope it Helps!
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closing Cursor in SQLite database explicitly, needed or not needed?

closing Cursor in SQLite database explicitly, needed or not needed?


By : Farhad Abedini
Date : March 29 2020, 07:55 AM
wish helps you The cursor isn't closed in the strict sense by closing the database (it's still there and you can perform operations on it), but as you know, closing the database makes the cursor useless. You should close cursors explicitly after you're done using them for a number of reasons:
1) As you noted, after closing the database, any remaining cursors become "invalid," and cannot be relied upon for accurate data;
In Android SQLite, working directly with Cursor is more memory efficient than creating Model Objects?

In Android SQLite, working directly with Cursor is more memory efficient than creating Model Objects?


By : user2739832
Date : March 29 2020, 07:55 AM
it fixes the issue The Cursor approach is more memory efficient:
Suppose you have 1000 entries in your database and you have a ListView which can show 10 entries at the same time. If you create a list at first, you'll have to create 1000 model objects (each of which in turn consists of several objects depending on the number of columns of your table) and the listview creates additional 10 views (actually some more, depending on the layout of the list) for displaying the 10 items. Now when the user scrolls the list, in your Adapter you end up copying data from your model objects to the list item views currently in view.
Is Cursor is class or interface in Android?

Is Cursor is class or interface in Android?


By : user3689334
Date : March 29 2020, 07:55 AM
will be helpful for those in need As you say, Cursor is an interface and db.query(); returns a class that implements the Cursor interface. That is, db.query(); returns the implementation of a Cursor.
When you use the Cursor interface, you don't have to worry about the concrete implementation, you only know that it has methods such as getCount() and close() that you can use and that are implemented by the concrete implementation returned by db.query();.
How many images are needed per class to retrain CNN model such as InceptionV3 from scratch

How many images are needed per class to retrain CNN model such as InceptionV3 from scratch


By : Andrew Sutherland
Date : March 29 2020, 07:55 AM
Hope this helps Well the inceptionV3 has a model based on imagenet, so about 1000 should do. Are you sure you need to train it from scratch though?
taskdef A class needed by class com.android.ant.GetUiTargetTask cannot be found: com/android/utils/ILogger

taskdef A class needed by class com.android.ant.GetUiTargetTask cannot be found: com/android/utils/ILogger


By : Kieran Mcdonnell
Date : March 29 2020, 07:55 AM
I wish this help you You need to copy the mentioned files from tools that still have them, like windows version:
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