Detailed explanation of Android programming custom component examples

This article describes the example of Android programming custom components. Share with you for your reference, as follows:

In Android, all UI interfaces are composed of view class, ViewGroup class and their subclasses. The view class is the base class of all UI components, and the ViewGroup class is the container that holds these UI components.

It is also a subclass of the view class.

In actual development, the view class is not enough to meet all the requirements of the program. At this time, you can develop your own components by inheriting the view class.

To develop custom components:

1. Create a view class that inherits the android.view.view class and override the constructor. 2. Rewrite the corresponding methods as needed. 3. Create and instantiate a custom view class and add it to the layout manager.

Now learn to use custom classes

1. First, create a java file to draw the picture

2. Instantiate the picture in the main activity and add a touch event

Corresponding layout file

The renderings are as follows:

More readers interested in Android related content can view the special topics of this site: introduction and advanced tutorial of Android development, summary of Android debugging skills and common problem solving methods, summary of Android basic component usage, summary of Android view skills, summary of Android layout skills and summary of Android control usage

I hope this article will help you in Android programming.