What are Adapters and when and how are they used ?
It is tough to develop an Android app without using an adapter somewhere because they are so important.
Where do adapters fit in? They bridge the Model and View (e.g. AdapterViews such as ListViews, GridViews, Spinners and ViewPagers) with underlying data. They provide access to data items and are responsible for creating a view for each item in the data set.
Android doesn’t adopt the MVC pattern per se. You define the Model that works for you. Android helps you layout and render views, and you customize Android’s Activities and Fragments that typically act as Controllers.
Novice developers might try to get away with using simple helper adapters like ArrayAdapter, SimpleAdapter and SimpleCursorAdapter when possible, but these are usually too limiting for some of the more complex views typically required by todays apps. Master developers will write adapters that extend BaseAdapter directly, because it is more powerful and flexible than the subclass helpers mentioned above.
It is tough to develop an Android app without using an adapter somewhere because they are so important.
Where do adapters fit in? They bridge the Model and View (e.g. AdapterViews such as ListViews, GridViews, Spinners and ViewPagers) with underlying data. They provide access to data items and are responsible for creating a view for each item in the data set.
Android doesn’t adopt the MVC pattern per se. You define the Model that works for you. Android helps you layout and render views, and you customize Android’s Activities and Fragments that typically act as Controllers.
Novice developers might try to get away with using simple helper adapters like ArrayAdapter, SimpleAdapter and SimpleCursorAdapter when possible, but these are usually too limiting for some of the more complex views typically required by todays apps. Master developers will write adapters that extend BaseAdapter directly, because it is more powerful and flexible than the subclass helpers mentioned above.
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