How is the usage method of scheme in Android?

In Android, the method of using Scheme is achieved through Intents. Scheme is a way to invoke other application components, similar to URLs. By specifying a Scheme, you can directly open specific pages or perform certain actions in other applications.

The following are the steps for using Scheme.

1. Create an Intent object, specifying the Scheme and the page or action to open.
2. When the startActivity() method is called to launch an Intent, the system will find the matching application based on the Scheme and open the corresponding page or perform the corresponding action.

For example, here is a sample of using Scheme to open a browser.

Uri uri = Uri.parse("http://www.example.com");
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
startActivity(intent);

In this example, we created an Intent object specifying the Scheme as “http” and the website to open as “www.example.com”. Then, we call the startActivity() method, which will launch the browser application and open the website.

It is important to note that when using Scheme to open another application, it is essential to ensure that the target application supports that Scheme, otherwise the opening will fail. Typically, applications will provide a list of supported Schemes in their documentation or developer documentation.