Detailed explanation of the underlying technical principle of Android Support Cardview V7 framework

Android Support CardView V7 is a support library for achieving card layout in Android applications.It is based on some underlying technical principles to achieve the display and interaction effect of the card view. 1. Material Design: CardView V7 is part of the design specifications of the Material Design. It provides a simple and beautiful way to display and organize information in the organization.By using the characteristics of shadow, rounded corners, CardView can create a modern card view in the application. 2. View system: CardView V7 is built based on the Android View system.It inherits Framelayout, so it is similar to a container when creating a card view.In CardView, you can add other control and view elements to create a rich card layout. 3. Custom attributes: CardView V7 controls the appearance and behavior of the card layout by using custom attributes.You can use these attributes in the XML layout file to set the shadows, rounded corners, and interior spacing of the card.For example, you can use the following attributes to set the corner radius of the card: <android.support.v7.widget.CardView ... app:cardCornerRadius="8dp"> 4. Shadow effect: CardView V7 uses the technology of drawing shadows to increase the three -dimensional sense of the card.When the card view floats on the screen, it projected the shadow.This shadow effect is achieved by using the attributes of View and Translation Z.You can set the shadow for the card view through the following code: CardView cardView = findViewById(R.id.cardView); cardView.setElevation(8dp); 5. CardView V7 supports a rounded corner for card view.This can be implemented by setting the CardCornerradius property.The larger the value of the rounded corner radius, the more obvious the rounded effect.The following code shows how to set the radius radius in the XML layout file: <android.support.v7.widget.CardView ... app:cardCornerRadius="8dp"> Summary: Android Support Cardview V7 framework is a support library to achieve card -type layout.It is based on the design specifications of Material Design and uses underlying technical principles such as the View system, custom attributes, shadow effects, and rounded effects to create modern card views.By using CardView V7, developers can easily achieve beautiful card layout effects in Android applications.