解决办法：更新.classpath和.project （1）.classpath：
<classpathentry kind="con" path="com.android.ide.eclipse.adt.ANDROID_FRAMEWORK"/> 替换成： <classpathentry kind="con" path="org.eclipse.andmore.ANDROID_FRAMEWORK"/>（2）.project更新为新的：
<?xml version="1.0" encoding="UTF-8"?> <projectDescription> <name>Demo</name> <comment></comment> <projects> </projects> <buildSpec> <buildCommand> <name>org.eclipse.andmore.ResourceManagerBuilder</name> <arguments> </arguments> </buildCommand> <buildCommand> <name>org.eclipse.andmore.PreCompilerBuilder</name> <arguments> </arguments> </buildCommand> <buildCommand> <name>org.eclipse.jdt.core.javabuilder</name> <arguments> </arguments> </buildCommand> <buildCommand> <name>org.eclipse.andmore.ApkBuilder</name> <arguments> </arguments> </buildCommand> </buildSpec> <natures> <nature>org.eclipse.andmore.AndroidNature</nature> <nature>org.eclipse.jdt.core.javanature</nature> </natures> </projectDescription>