修改了 xml 资源后不生效

[VankaIn]

修改了布局文件textview 的 text 属性(其他属性也会)
会提示：

Source and reource not changed

然后 activity 也没有 restart

[VankaIn]

还有一个现象就是：
修改 layoutA.xml 不生效的情况下，修改 layoutB.xml 生效了，那么上一次的 layoutA.xml 的修改也生效

[tong]

判断资源是否发生变化是根据是否执行了processResources任务，出现这种情况时留意下日志里processResources后面有没有UP-TO-DATE，如果没有就是fastdex的问题了方便的话提供一个完整的打包日志

[VankaIn]

成功的日志：

> Task :app:fastdexScanAptOutputForDebug
==fastdex diff apt dir: /Users/liangjunjie/Android/workspace/yixinli/fmapp2017-android/app/build/generated/source/apt/debug

> Task :app:fastdexPatchForDebug
==fastdex pc   **resourceChanged: true** , assetsChanged: false, sourceChanged: false, manifestChanged: false
==fastdex receive: MetaInfo{buildMillis=1513670837182, variantName='Debug', mergedDexVersion=19, patchDexVersion=0, resourcesVersion=18}
==fastdex app  sendResourcesApk: true , sendPatchDex: false, sendMergedDex: false
==fastdex copy resources.ap_ 
copy : /Users/liangjunjie/Android/workspace/yixinli/fmapp2017-android/app/build/intermediates/res/debug/resources-debug.ap_ 
into: /Users/liangjunjie/Android/workspace/yixinli/fmapp2017-android/app/build/fastdex/Debug/res/temp/resources.apk

失败的日志：

> Task :app:fastdexPrepareForDebug
==fastdex hasDexCache: true
==fastdex discover dex cache for debug
==fastdex skip scan: /Users/liangjunjie/Android/workspace/yixinli/fmapp2017-android/app/build/generated/source/apt/debug
==fastdex remove apt-dir from old snapshoot.

> Task :app:fastdexScanAptOutputForDebug
==fastdex diff apt dir: /Users/liangjunjie/Android/workspace/yixinli/fmapp2017-android/app/build/generated/source/apt/debug

> Task :app:fastdexPatchForDebug
==fastdex pc   **resourceChanged: false** , assetsChanged: false, sourceChanged: false, manifestChanged: false
==fastdex receive: MetaInfo{buildMillis=1513670837182, variantName='Debug', mergedDexVersion=19, patchDexVersion=0, resourcesVersion=19}
==fastdex app  sendResourcesApk: false , sendPatchDex: false, sendMergedDex: false

应该是可以必现的，修改 textview 的 android:text="123", 然后再修改 android:text="1234"，前面都生效，然后再修改回android:text="123"就不生效了。我猜应该是之前修改过的再修改回来就不生效了，比如"123" -> "1234" -> "12345"（都生效），但之后更改回"123"，"1234"就不生效了