[Jetpack] Simple comparison between ViewBinding and DataBinding

一、DataBinding

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DataBinding started to be used in Android Studio 2.0 in 2016 , and its role is to realize the binding between the data model Model and the view View , which is a two-way binding;

• The data model Model is the instance object of the data class;
• View View refers to the Xml layout file;

DataBinding is to configure the data model instance object into the Xml layout file ;

The code logic that DataBinding can replace:

• findViewById
• setOnClickListener
• setText
• setVisibility
• setEnable
• setXxx

Obviously, DataBinding can get components in Activity / Fragment / Dialog, set click events, set text, set visibility, etc. in Xml layout files ;

Two, ViewBinding

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ViewBinding is used in Android Studio 3.6 version in 2019. Its function is to generate binding classes for Xml layout files . With the help of this binding class, components in Xml can be quickly obtained;

The code logic that ViewBinding can replace:

• findViewById
• Define the member fields of the View component

The functions of ViewBinding and ButterKnife are basically the same , and the compilation performance is better than ButterKnife, because ButterKnife uses a lot of annotations, and its compilation speed is lower than that of ViewBinding;

Compared with DataBinding, ViewBinding is a lighter function library;

• Integrated DataBinding is much slower than ViewBinding compilation;
• The compiled Apk integrated with DataBinding is dozens of KB larger than ViewBinding;

If you just want to omit the findViewById code, use ViewBinding;