Implement a search and filter in flutter
There are many flutter widgets to implement search feature just like in Android, yet there is a simpler way to implement this using flutter SearchDelegate class which gives you almost all that you want in only 4–5 simple steps so let’s see what we can do with this
We will need to explore two classes before we start
SliverAppBar
When we want a dynamic toolbar that when we slide or expand it shows us content, we use the great widget called SliverAppBar which always be the first child for CustomScrollView.
This will make a cute app bar with two icons
Next we will implement the search feature.
CustomSearchDelegate
To make a custom search , you need to create a new class that extends the SearchDelegate class. after overriding the SearchDelegate method you will have this class
Now let's build our search class, a simple class will be shown below
Now we just have to connect our cute search app bar with our custom search class
if you remember our search button icon from the above silver app bar we just need to add the showSearch method to connect the app to the searchClass, the rest is magic ^-^.
I added some optional features like instant search suggestions and recent search suggestions to the example, the source code can be found here.
