task generateRJava generates attr that can't find

[goolong]

if (rTxt.exists()) {
                rTxt.eachLine {
                    line ->
                        //noinspection GroovyUnusedAssignment
                        def (type, subclass, name, value) = line.tokenize(' ')
                        rMap[subclass].putAt(name, type)
                }
            }

            def sb = "package $aarPackageName;" << '\n' << '\n'
            sb << 'public final class R {' << '\n'

            rMap.each {
                subclass, values ->
                    sb << "  public static final class $subclass {" << '\n'
                    values.each {
                        name, type ->
                            sb << "    public static $type $name = ${libPackageName}.R.${subclass}.${name};" << '\n'
                    }
                    sb << "    }" << '\n'
            }

            sb << '}' << '\n'

In R.txt file，(type, subclass, name, value)，some res name belong to System，so can't find it in our library

/Users/goolong/Didi/unifiedPaySdk/pay/build/generated/source/r/release/com/didi/didipay/pay/R.java:89: 错误: 找不到符号
public static int constraintSet = com.didi.unified.pay.R.attr.constraintSet;
^
符号: 变量 constraintSet
位置: 类 attr

[tommy8421]

@goolong Normally it's caused by using different version of support library. -- FYI