Analysis of SD card file operation in Android Development

This paper describes the SD card file operation developed by Android. Share with you for your reference, as follows:

In the previous article, I wrote a program to directly operate the mobile phone's own memory. This time, I will follow the file operation of SD card under the last article protocol. Different from the built-in storage, the SD card requires user authorization

Remember not to write upside down, or you won't see the result

Then write a method to save the file

Finally, you can use this method in the control layer. You need to judge the state of the SD card. You can use environment. Getexternalstoragestate() to obtain the state. If it is available, you can save the file. Otherwise, you will be prompted that "the SD card does not exist or is not available"

Next, post the strings. XML

Here you can operate the SD card. There are few things this time.

For more Android related content, readers who are interested can view the special topics of this site: summary of SD card operation methods for Android programming and development, summary of Android file operation skills, summary of Android database operation skills, summary of activity operation skills for Android programming, introduction and advanced tutorial for Android development, summary of Android resource operation skills Android view skills summary and Android control usage summary

I hope this article will help you in Android programming.