Eclipse 的Android ADT安装不上

我是直接在eclipse中安装的

Help-Install New Software-Add...

试过的第一种方法：直接使用在官网下载的ADT；

第二种：使用在线安装方法填入地址https://dl-ssl.google.com/android/eclipse/

都显示下图的情况。

这是错误代码：

An error occurred while collecting items to be installed
 session context was:(profile=epp.package.java, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
 No repository found containing: org.eclipse.update.feature,org.eclipse.cdt,8.6.0.201502131403
 No repository found containing: org.eclipse.update.feature,org.eclipse.cdt.gdb,8.6.0.201502131403
 No repository found containing: org.eclipse.update.feature,org.eclipse.cdt.gnu.build,8.6.0.201502131403
 No repository found containing: org.eclipse.update.feature,org.eclipse.cdt.gnu.debug,8.6.0.201502131403
 No repository found containing: org.eclipse.update.feature,org.eclipse.cdt.gnu.dsf,8.6.0.201502131403
 No repository found containing: org.eclipse.update.feature,org.eclipse.cdt.native,8.6.0.201502131403
 No repository found containing: org.eclipse.update.feature,org.eclipse.cdt.platform,8.6.0.201502131403