oss android 混淆后 报错 工单提交不上去，一直提示手机号 有问题 ，在这儿来请教个问题，

-keep class com.alibaba.sdk.android.oss.** { *; }
-dontwarn okio.**
-dontwarn org.apache.commons.codec.binary.**
#-keep class org.apache.commons.**{ *;}
#-keep class com.alibab

这儿是 报错信息

tx W/System.err: java.lang.IllegalStateException: Compute signature failed!
07-09 11:18:40.666 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.common.utils.OSSUtils.sign(OSSUtils.java:406)
07-09 11:18:40.666 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.common.utils.OSSUtils.signRequest(OSSUtils.java:585)
07-09 11:18:40.666 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.network.OSSRequestTask.call(OSSRequestTask.java:85)
07-09 11:18:40.666 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.network.OSSRequestTask.call(OSSRequestTask.java:43)
07-09 11:18:40.666 8587-9086/com.srbl.mytx W/System.err:     at java.util.concurrent.FutureTask.run(FutureTask.java:237)
07-09 11:18:40.666 8587-9086/com.srbl.mytx W/System.err:     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
07-09 11:18:40.667 8587-9086/com.srbl.mytx W/System.err:     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
07-09 11:18:40.667 8587-9086/com.srbl.mytx W/System.err:     at java.lang.Thread.run(Thread.java:818)
07-09 11:18:40.667 8587-9086/com.srbl.mytx W/System.err: Caused by: java.lang.NullPointerException: throw with null exception
07-09 11:18:40.667 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.common.utils.BinaryUtil.toBase64String(BinaryUtil.java:20)
07-09 11:18:40.667 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.common.auth.HmacSHA1Signature.computeSignature(HmacSHA1Signature.java:51)
07-09 11:18:40.667 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.common.utils.OSSUtils.sign(OSSUtils.java:403)
07-09 11:18:40.667 8587-9086/com.srbl.mytx W/System.err: 	... 7 more
07-09 11:18:40.671 8587-9086/com.srbl.mytx W/System.err: java.lang.IllegalStateException: Compute signature failed!
07-09 11:18:40.671 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.common.utils.OSSUtils.sign(OSSUtils.java:406)
07-09 11:18:40.671 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.common.utils.OSSUtils.signRequest(OSSUtils.java:585)
07-09 11:18:40.671 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.network.OSSRequestTask.call(OSSRequestTask.java:85)
07-09 11:18:40.671 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.network.OSSRequestTask.call(OSSRequestTask.java:236)
07-09 11:18:40.671 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.network.OSSRequestTask.call(OSSRequestTask.java:43)
07-09 11:18:40.671 8587-9086/com.srbl.mytx W/System.err:     at java.util.concurrent.FutureTask.run(FutureTask.java:237)
07-09 11:18:40.671 8587-9086/com.srbl.mytx W/System.err:     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
07-09 11:18:40.672 8587-9086/com.srbl.mytx W/System.err:     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
07-09 11:18:40.672 8587-9086/com.srbl.mytx W/System.err:     at java.lang.Thread.run(Thread.java:818)
07-09 11:18:40.672 8587-9086/com.srbl.mytx W/System.err: Caused by: java.lang.NullPointerException: throw with null exception
07-09 11:18:40.672 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.common.utils.BinaryUtil.toBase64String(BinaryUtil.java:20)
07-09 11:18:40.672 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.common.auth.HmacSHA1Signature.computeSignature(HmacSHA1Signature.java:51)
07-09 11:18:40.672 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.common.utils.OSSUtils.sign(OSSUtils.java:403)
07-09 11:18:40.672 8587-9086/com.srbl.mytx W/System.err: 	... 8 more
07-09 11:18:40.676 8587-9086/com.srbl.mytx W/System.err: com.alibaba.sdk.android.oss.ClientException: Compute signature failed!
07-09 11:18:40.676 8587-9086/com.srbl.mytx W/System.err: [ErrorMessage]: Compute signature failed!
07-09 11:18:40.676 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.network.OSSRequestTask.call(OSSRequestTask.java:190)
07-09 11:18:40.676 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.network.OSSRequestTask.call(OSSRequestTask.java:236)
07-09 11:18:40.676 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.network.OSSRequestTask.call(OSSRequestTask.java:236)
07-09 11:18:40.676 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.network.OSSRequestTask.call(OSSRequestTask.java:43)
07-09 11:18:40.676 8587-9086/com.srbl.mytx W/System.err:     at java.util.concurrent.FutureTask.run(FutureTask.java:237)
07-09 11:18:40.676 8587-9086/com.srbl.mytx W/System.err:     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
07-09 11:18:40.676 8587-9086/com.srbl.mytx W/System.err:     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
07-09 11:18:40.677 8587-9086/com.srbl.mytx W/System.err:     at java.lang.Thread.run(Thread.java:818)
07-09 11:18:40.677 8587-9086/com.srbl.mytx W/System.err: Caused by: java.lang.IllegalStateException: Compute signature failed!
07-09 11:18:40.677 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.common.utils.OSSUtils.sign(OSSUtils.java:406)
07-09 11:18:40.677 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.common.utils.OSSUtils.signRequest(OSSUtils.java:585)
07-09 11:18:40.677 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.network.OSSRequestTask.call(OSSRequestTask.java:85)
07-09 11:18:40.677 8587-9086/com.srbl.mytx W/System.err: 	... 7 more
07-09 11:18:40.677 8587-9086/com.srbl.mytx W/System.err: Caused by: java.lang.NullPointerException: throw with null exception
07-09 11:18:40.677 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.common.utils.BinaryUtil.toBase64String(BinaryUtil.java:20)
07-09 11:18:40.677 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.common.auth.HmacSHA1Signature.computeSignature(HmacSHA1Signature.java:51)
07-09 11:18:40.677 8587-9086/com.srbl.mytx W/System.err:     at com.alibaba.sdk.android.oss.common.utils.OSSUtils.sign(OSSUtils.java:403)
07-09 11:18:40.677 8587-9086/com.srbl.mytx W/System.err: 	... 9 more