sample中的MainActivity如何配置（运行sample前需要配置以下字段为有效的值）

这是我的MainActivity
    
不知道是哪个地方没有配置正确，运行以后点击UPLOAD出现以下问题：()
         09-22 20:10:17.559 13941-15952/ com.alibaba.sdk.android.oss.app E/OSS-Android-SDK: Encounter local execpiton: java.io.FileNotFoundException: http:/oss-cn-shanghai.aliyuncs.com/123: open failed: ENOENT (No such file or directory)
09-22 20:10:17.559 13941-15952/com.alibaba.sdk.android.oss.app W/System.err: java.io.FileNotFoundException: http:/oss-cn-shanghai.aliyuncs.com/123: open failed: ENOENT (No such file or directory)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at libcore.io.IoBridge.open(IoBridge.java:456)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at java.io.FileInputStream.<init>(FileInputStream.java:76)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at okio.Okio.source(Okio.java:166)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at com.alibaba.sdk.android.oss.network.OSSRequestTask$ProgressTouchableRequestBody.writeTo(OSSRequestTask.java:105)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at okhttp3.internal.http.CallServerInterceptor.intercept(CallServerInterceptor.java:47)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:45)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:109)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:124)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:170)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at okhttp3.RealCall.execute(RealCall.java:60)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at com.alibaba.sdk.android.oss.network.OSSRequestTask.call(OSSRequestTask.java:227)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at com.alibaba.sdk.android.oss.network.OSSRequestTask.call(OSSRequestTask.java:44)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at java.util.concurrent.FutureTask.run(FutureTask.java:237)
09-22 20:10:17.560 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
09-22 20:10:17.561 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
09-22 20:10:17.561 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at java.lang.Thread.run(Thread.java:818)
09-22 20:10:17.561 13941-15952/com.alibaba.sdk.android.oss.app W/System.err: Caused by: android.system.ErrnoException: open failed: ENOENT (No such file or directory)
09-22 20:10:17.561 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at libcore.io.Posix.open(Native Method)
09-22 20:10:17.561 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at libcore.io.BlockGuardOs.open(BlockGuardOs.java:186)
09-22 20:10:17.561 13941-15952/com.alibaba.sdk.android.oss.app W/System.err:     at libcore.io.IoBridge.open(IoBridge.java:442)