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Today, I would like to share with you the relevant knowledge about how to adjust the Android application environment. The content is detailed and the logic is clear. I believe most people still know too much about this, so share this article for your reference. I hope you can get something after reading this article. Let's take a look at it.

Different Android target will have different sizes, and the interface of the application needs to resize the interface elements according to different sizes. And the Android screen size can also be switched between horizontal and vertical screens, and the interface needs to be adjusted. How to get the orientation of the screen: by default, when the screen aspect is switched, the onCreate () method of activity is called again, so you can read the orientation of the screen through the following code:

Each Android application runs in a Dalvik virtual machine instance, and each virtual machine instance is a separate process space. The threading mechanism of virtual machine, memory allocation and management, Mutex and so on all depend on the underlying operating system. All Android application threads correspond to a Linux thread, so the virtual machine can rely more on the thread scheduling and management mechanism of the operating system.

Different applications run in different process spaces, and different Linux users are used to run applications from different sources, which can protect the security of applications and run independently. Zygote is not only a virtual machine process, but also an incubator for virtual machine instances.

Whenever the system asks to execute an Android application, Zygote will FORK a child process to execute the application. The benefits of this are obvious: the Zygote process is generated at system startup, and it completes the initialization of the virtual machine and the loading of the library.

Preset operations such as loading and initialization of class libraries, and when the system needs a new virtual machine instance, Zygote provides a system as quickly as possible by copying itself. In addition, for some read-only system libraries, all virtual machine instances share a memory area with Zygote, which greatly saves memory overhead.

These are all the contents of the article "how to adjust the Android Application Environment". Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.

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