modify:

1、add android sdk v3.1.0

Doc/android-ReleaseNotes.md

 DoraemonKit-Android releases
 ===
 
+## 3.1.0
+1.安卓版本DoKit从3.1.0版本开始全面拥抱Androidx,假如你的项目还没有升级到androidx你可以选择依赖3.0.2版本
+
+## 3.0.2
+1.安卓版DoKit从3.0.2版本开始将逐渐放弃对Android Support版本的支持，请大家全面拥抱androidx吧
+
 ## 3.0.0
 1.优化dokit 慢函数代码插件性能
 2.优化大图检测实现方式，不再需要手动注入代码(支持Glide4.0+、Fresco、Picasso、ImageLoader)

Doc/android_cn_guide.md

@@ -5,8 +5,8 @@
 ```groovy
 dependencies {
     …
-    debugImplementation 'com.didichuxing.doraemonkit:doraemonkit:3.0.0'
-    releaseImplementation 'com.didichuxing.doraemonkit:doraemonkit-no-op:3.0.0'
+    debugImplementation 'com.didichuxing.doraemonkit:doraemonkit:3.1.0'
+    releaseImplementation 'com.didichuxing.doraemonkit:doraemonkit-no-op:3.1.0'
     …
 }
 ```
@@ -14,7 +14,7 @@ dependencies {
  假如你无法通过 jcenter 下载到依赖库并报了以下的错误 
 
 ```
-ERROR: Failed to resolve: com.didichuxing.doraemonkit:doraemonkit:3.0.0
+ERROR: Failed to resolve: com.didichuxing.doraemonkit:doraemonkit:3.1.0
 ```
 
 建议你可以尝试挂载VPN或通过命令行重试(以Mac系统为例 项目根目录下)
@@ -38,8 +38,8 @@ DoraemonKit目前已支持Weex工具，包括
 ```groovy
 dependencies {
     …
-    debugImplementation 'com.didichuxing.doraemonkit:doraemonkit-weex:3.0.0'
-    releaseImplementation 'com.didichuxing.doraemonkit:doraemonkit-weex-no-op:3.0.0'
+    debugImplementation 'com.didichuxing.doraemonkit:doraemonkit-weex:3.1.0'
+    releaseImplementation 'com.didichuxing.doraemonkit:doraemonkit-weex-no-op:3.1.0'
     …
 }
 ```
@@ -49,7 +49,7 @@ dependencies {
 ```groovy
 dependencies {
     …
-    debugImplementation 'com.didichuxing.doraemonkit:doraemonkit-leakcanary:3.0.0'
+    debugImplementation 'com.didichuxing.doraemonkit:doraemonkit-leakcanary:3.1.0'
     …
 }
 ```
@@ -91,7 +91,7 @@ AOP包括以下几个功能:
 buildscript {
     dependencies {
         …
-        classpath 'com.didichuxing.doraemonkit:doraemonkit-plugin:3.0.0'
+        classpath 'com.didichuxing.doraemonkit:doraemonkit-plugin:3.1.0'
         …
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

Doc/android_en_guide.md

@@ -5,8 +5,8 @@
 ```
 dependencies {
     …
-    debugImplementation 'com.didichuxing.doraemonkit:doraemonkit:3.0.0'
-    releaseImplementation 'com.didichuxing.doraemonkit:doraemonkit-no-op:3.0.0'
+    debugImplementation 'com.didichuxing.doraemonkit:doraemonkit:3.1.0'
+    releaseImplementation 'com.didichuxing.doraemonkit:doraemonkit-no-op:3.1.0'
     …
 }
 ```
@@ -45,7 +45,7 @@ Add a dependency in `build.gradle` in root of host project as following.
 buildscript {
     dependencies {
         …
-        classpath 'com.didichuxing.doraemonkit:doraemonkit-plugin:3.0.0'
+        classpath 'com.didichuxing.doraemonkit:doraemonkit-plugin:3.1.0'
         …
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

README.md

 <div align="center">    
  <img src="https://javer.oss-cn-shanghai.aliyuncs.com/doraemon/github/DoraemonKit_github.png" width = "150" height = "150" alt="DoraemonKit" align=left />
  <img src="https://img.shields.io/github/license/didi/DoraemonKit.svg" align=left />
- <img src="https://img.shields.io/badge/Android-3.0.0-blue.svg" align=left />
+ <img src="https://img.shields.io/badge/Android-3.1.0-blue.svg" align=left />
  <img src="https://img.shields.io/badge/iOS-3.0.0-yellow.svg" align=left />
  <img src="https://img.shields.io/badge/miniapp-0.0.1-red.svg" align=left />
  <img src="https://img.shields.io/badge/PRs-welcome-brightgreen.svg" align=left />

README_EN.md

 <div align="center">    
  <img src="https://javer.oss-cn-shanghai.aliyuncs.com/doraemon/github/DoraemonKit_github.png" width = "150" height = "150" alt="DoraemonKit" align=left />
  <img src="https://img.shields.io/github/license/didi/DoraemonKit.svg" align=left />
- <img src="https://img.shields.io/badge/Android-2.2.2-blue.svg" align=left />
+ <img src="https://img.shields.io/badge/Android-3.1.0-blue.svg" align=left />
  <img src="https://img.shields.io/badge/iOS-2.0.0-yellow.svg" align=left />
  <img src="https://img.shields.io/badge/PRs-welcome-brightgreen.svg" align=left />
 </div>
@@ -33,7 +33,7 @@ A full-featured App (iOS & Android) development assistant. You deserve it.
 ## Feature Demonstration
 
 <div align="center">    
- <img src="https://javer.oss-cn-shanghai.aliyuncs.com/doraemon/DoraemonKit2/DoraemonKit2.png" width = "300" height = "565" alt="Demonstration" align=center />
+  <img src="https://pt-starimg.didistatic.com/static/starimg/img/H1SVa0S6Zm1585189141793.jpg" width = "250" alt="DoKit 首页效果演示" align=center />
 </div>
 
 ## How To Use