https://developer.android.google.cn/guidehttps://developer.android.google.cn/

https://gitee.com/xiyangyang8110/xUtils31依赖implementation 'org.xutils:xutils:3.9.0'2public class MyApp extends Application {// 在application的onCreate中初始化@Overridepublic void onCreate() {super.onCreate(

http://www.114la.com/other/rgb.htm

compile ‘com.zhy:okhttputils:2.6.2’

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.an

1安卓项目里面的协程写法。

这是因为访问不到maven.google.com了，请把maven的url换成阿里仓buildscript {repositories {jcenter()maven {url 'https://maven.aliyun.com/repository/google'name 'Google'}}dependencies {classpath 'com.a

https://mvnrepository.com/

community declares a dependency from configuration ‘compile’ to configuration ‘default’ which is not declared in the descriptor for project :library.最终的原因是缺少UpIM库的依赖include ':library'project(':libra

先把快捷键改成eclipse快捷键：设置-project stucture。