android studio学习----Warning:Unable to find optional library: org.apache.http.legacy

主要是没有  android-23的版本

1、导入工程以后

Error:Could not find com.Android.tools.build:gradle:1.3.1.

Searched in the following locations:
    file:/E:/android-studio/gradle/m2repository/com/android/tools/build/gradle/1.3.1/gradle-1.3.1.pom
    file:/E:/android-studio/gradle/m2repository/com/android/tools/build/gradle/1.3.1/gradle-1.3.1.jar
    http://mirrors.ibiblio.org/maven2/com/android/tools/build/gradle/1.3.1/gradle-1.3.1.pom
    http://mirrors.ibiblio.org/maven2/com/android/tools/build/gradle/1.3.1/gradle-1.3.1.jar
Required by:
    :DynamicAPK-master:unspecified

解决这个问题根据提示打开E:/android-studio/gradle/m2repository/com/android/tools/build/gradle看看该目录下有几个版本

修改成本地存在的即可

2：编译工具找不到

Error:A problem occurred configuring project ':bundle'.

> failed to find Build Tools revision 21.1.2

file --> default settings --- android sdk --> sdk Tools选项卡
看看sdk manager上安装的版本号是多少,  修改成存在的即可

3 lib找不到

Error:A problem occurred configuring project ':bundle'.

> Unable to find optional library: org.apache.http.legacy

Add org.apache.http.legacy.jar which is in Android/Sdk/platforms/android-23/optional folder to app/libs directory and sync your project

添加org.apache.http.legacy.jar 这个jar到android sdk安装目录下的 /android-23/optional

没有的话就去网上下载吧

4、

Error:(7, 1) A problem occurred evaluating project ':demo1'.
> Could not resolve all dependencies for configuration 'classpath'.
   > Could not resolve net.sf.proguard:proguard-gradle:5.2.1.
     Required by:
         unspecified:unspecified:unspecified
      > Could not resolve net.sf.proguard:proguard-gradle:5.2.1.
         > Could not get resource 'https://repo1.maven.org/maven2/net/sf/proguard/proguard-gradle/5.2.1/proguard-gradle-5.2.1.pom'.
            > Could not GET 'https://repo1.maven.org/maven2/net/sf/proguard/proguard-gradle/5.2.1/proguard-gradle-5.2.1.pom'.

> peer not authenticated

这个是用于没法访问 https://repo1.maven.org/maven2/net/sf/proguard/proguard-gradle/5.2.1/proguard-gradle-5.2.1.pom

没办法只能翻墙了