1、gradle版本太低，如果倒入的工程依赖的版本较高，AndroidStudio就会自动下载并升级Gradle，由于AndroidStudio下载很慢，所以最好自己手动下载，具体步骤见
http://blog.csdn.net/zhang_ying_xian/article/details/51096487，感谢楼主。
2、Could not resolve org.slf4j:slf4j-api:1.7.21.
Could not get resource 'http://maven.oschina.net/content/groups/public/org/slf4j/slf4j-api/1.7.21/slf4j-api-1.7.21.pom'.
这类错误是因为网络连不通，需要手动下载相应Jar包，并放在lib文件夹下，然后手动添加依赖，以下错误都是这类错误。
Error:A problem occurred configuring project ':app'.
> Could not resolve all dependencies for configuration ':app:_debugApkCopy'.
> Could not resolve org.slf4j:slf4j-api:1.7.21.
Required by:
OpenLive_Android-master:app:unspecified
> Could not resolve org.slf4j:slf4j-api:1.7.21.
> Could not get resource 'http://maven.oschina.net/content/groups/public/org/slf4j/slf4j-api/1.7.21/slf4j-api-1.7.21.pom'.
> Could not HEAD 'http://maven.oschina.net/content/groups/public/org/slf4j/slf4j-api/1.7.21/slf4j-api-1.7.21.pom'.
> Connect to maven.oschina.net:80 [maven.oschina.net/183.78.182.122] failed: 连接超时
> Could not resolve com.github.tony19:logback-android-core:1.1.1-5.
Required by:
OpenLive_Android-master:app:unspecified
> Could not resolve com.github.tony19:logback-android-core:1.1.1-5.
> Could not get resource 'http://maven.oschina.net/content/groups/public/com/github/tony19/logback-android-core/1.1.1-5/logback-android-core-1.1.1-5.pom'.
> Could not HEAD 'http://maven.oschina.net/content/groups/public/com/github/tony19/logback-android-core/1.1.1-5/logback-android-core-1.1.1-5.pom'.
> Connect to maven.oschina.net:80 [maven.oschina.net/183.78.182.122] failed: 连接超时
> Could not resolve com.github.tony19:logback-android-classic:1.1.1-5.
Required by:
OpenLive_Android-master:app:unspecified
> Could not resolve com.github.tony19:logback-android-classic:1.1.1-5.
> Could not get resource 'http://maven.oschina.net/content/groups/public/com/github/tony19/logback-android-classic/1.1.1-5/logback-android-classic-1.1.1-5.pom'.
> Could not HEAD 'http://maven.oschina.net/content/groups/public/com/github/tony19/logback-android-classic/1.1.1-5/logback-android-classic-1.1.1-5.pom'.
> Connect to maven.oschina.net:80 [maven.oschina.net/183.78.182.122] failed: 连接超时
上面的问题是因为网络连接失败，需要手动下载，放在lib文件夹下，然后手动添加依赖。
3、Error:A problem was found with the configuration of task ':app:prepareOpenLive_AndroidMasterLibvideoprpUnspecifiedLibrary'.
> File '/home/ukylin/projectModel/shengwang/demo/OpenLive_Android-master/libvideoprp/videoprp.aar' specified for property 'bundle' does not exist.
这是倒入声网Demo的时候遇到的问题，“videoprp.aar”这个文件没有，去SDK的包中找了一下。