Why does ZTE x850 fail to install applications with the Google map function?

The company developed an Android app that uses Google Maps and runs normally on most Android phones, however, on some mobile phones, especially on domestic custom machines such as ZTE's x850, It is very depressing that the installation is unsuccessful.

I was ordered to solve this problem today. I found an error during the ddms check and installation process:
08-30 15:51:49. 648: Error/packagemanager (1123): Package com. Map requires unavailable shared library com. Google. Android. Maps; failing!

Google has found many of the problems. Most of them are domestic custom machines, but there are only a few solutions. They have been searched n times over and over again. What is more reliable is that the custom machine lacks a shared library.Com. Google. Android. Maps. Jar

Therefore, first find a root tool to get the root permission of ZTE mobile phone, and then use re to set/system/framework as Writable. First, use ddms to setCom. Google. Android. Maps. JarImport the JAR file to/system/framework, and then import it to/etc/permission/platform. export XML to your computer and add a line <library name = "com. google. android. maps "file ="/system/framework/COM. google. android. maps. jar "/> (this directory must also be set to writable), and then import the mobile phone to overwrite the original one.

Restart.