Detailed explanation of file operation for Android Development

This paper describes the file operation of Android development. Share with you for your reference, as follows:

At present, almost all devices will involve the operation of files, such as computers, mobile phones and other devices. The file operation of Android is similar to that of computer. It can be stored in the built-in memory of mobile phone or SD card. This article mainly introduces the file operation in the built-in memory of the mobile phone.

1、 Development process

(1) Interface design (2) design the business layer of Android (3) unit test (4) set the controller layer of Android

2、 Development steps

(1) Design software interface

Here I also show you the R file

(2) Design business layer

Let's start unit testing. We won't talk about the environment to be added

Take a look at the effect after running

The unit test has passed. Let's look at the effect on the simulator. Before that, let's look at the following code

If the save is successful, a graphical notification will be given to the user:

Next, post the code of strings. XML

More readers interested in Android related content can view the special topics of this site: summary of Android file operation skills, summary of Android view skills, summary of activity operation skills of Android programming, summary of Android layout skills, introduction and advanced tutorial of Android development, summary of Android resource operation skills, and Android control usage summary

I hope this article will help you in Android programming.