用 Android Plugin for Gradle 3.0.1 构建的 apk 能否进行加固？

如题，使用命令行报如下错误：

[backcolor=rgba(0, 0, 0, 0.901961)]/Users/cuiwei/Downloads/360jiagubao_mac/jiagu

[backcolor=rgba(0, 0, 0, 0.901961)]login success

[backcolor=rgba(0, 0, 0, 0.901961)]begin jiagu task

[backcolor=rgba(0, 0, 0, 0.901961)]java.io.IOException: Cannot run program \"/Users/cuiwei/Downloads/360jiagubao_mac/jiagu/java/bin/aapt\": error=2, No such file or directory

[backcolor=rgba(0, 0, 0, 0.901961)]        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)

[backcolor=rgba(0, 0, 0, 0.901961)]        at java.lang.Runtime.exec(Runtime.java:620)

[backcolor=rgba(0, 0, 0, 0.901961)]        at java.lang.Runtime.exec(Runtime.java:485)

[backcolor=rgba(0, 0, 0, 0.901961)]        at com.qihoo.jiagu.h.m.ALLATORIxDEMO(hc:460)

[backcolor=rgba(0, 0, 0, 0.901961)]        at com.qihoo.jiagu.h.u.ALLATORIxDEMO(kd:122)

[backcolor=rgba(0, 0, 0, 0.901961)]        at com.qihoo.jiagu.d.l(ul:38)

[backcolor=rgba(0, 0, 0, 0.901961)]        at com.qihoo.jiagu.d.ALLATORIxDEMO(ul:266)

[backcolor=rgba(0, 0, 0, 0.901961)]        at com.qihoo.jiagu.G.ALLATORIxDEMO(hi:345)

[backcolor=rgba(0, 0, 0, 0.901961)]        at com.qihoo.jiagu.G.ALLATORIxDEMO(hi:472)

[backcolor=rgba(0, 0, 0, 0.901961)]        at com.qihoo.jiagu.a.d.F.onSuccess(g:63)

[backcolor=rgba(0, 0, 0, 0.901961)]        at com.qihoo.jiagu.net.http.HttpHandler.onProgressUpdate(nb:121)

[backcolor=rgba(0, 0, 0, 0.901961)]        at com.qihoo.jiagu.net.a.M.publishProgress(w:101)

[backcolor=rgba(0, 0, 0, 0.901961)]        at com.qihoo.jiagu.net.http.HttpHandler.doInBackground(nb:290)

[backcolor=rgba(0, 0, 0, 0.901961)]        at com.qihoo.jiagu.net.http.HttpHandler.doInBackground(nb:4)

[backcolor=rgba(0, 0, 0, 0.901961)]        at com.qihoo.jiagu.net.a.L.call(w:35)

[backcolor=rgba(0, 0, 0, 0.901961)]        at java.util.concurrent.FutureTask.run(FutureTask.java:266)

[backcolor=rgba(0, 0, 0, 0.901961)]        at com.qihoo.jiagu.net.a.m.run(r:183)

[backcolor=rgba(0, 0, 0, 0.901961)]        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

[backcolor=rgba(0, 0, 0, 0.901961)]        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

[backcolor=rgba(0, 0, 0, 0.901961)]        at java.lang.Thread.run(Thread.java:745)

[backcolor=rgba(0, 0, 0, 0.901961)]Caused by: java.io.IOException: error=2, No such file or directory

[backcolor=rgba(0, 0, 0, 0.901961)]        at java.lang.UNIXProcess.forkAndExec(Native Method)

[backcolor=rgba(0, 0, 0, 0.901961)]        at java.lang.UNIXProcess.<init>(UNIXProcess.java:248)

[backcolor=rgba(0, 0, 0, 0.901961)]        at java.lang.ProcessImpl.start(ProcessImpl.java:134)

[backcolor=rgba(0, 0, 0, 0.901961)]        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)

[backcolor=rgba(0, 0, 0, 0.901961)]        ... 19 more

[backcolor=rgba(0, 0, 0, 0.901961)]invalid apk

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