试图上传图片，但得到这个错误Android应用程序

Question

Im使用okhttp 2.5.0,Im获取一张pic,然后将其转换为base 64格式，然后将其作为post变量发送到服务器，然后将其解码回jpg格式并保存到服务器....当我使用像1兆像素(0.5MB)的小图像时，它可以完美地工作······但是当我增加分辨率时，这个异常发生了...

09-10 23:29:47.673  25742-27156/in.definexit.chemapp W/System.err﹕ java.net.SocketTimeoutException: timeout
09-10 23:29:47.676  25742-27156/in.definexit.chemapp W/System.err﹕ at okio.Okio$3.newTimeoutException(Okio.java:207)
09-10 23:29:47.676  25742-27156/in.definexit.chemapp W/System.err﹕ at okio.AsyncTimeout.exit(AsyncTimeout.java:261)
09-10 23:29:47.677  25742-27156/in.definexit.chemapp W/System.err﹕ at okio.AsyncTimeout$1.write(AsyncTimeout.java:158)
09-10 23:29:47.677  25742-27156/in.definexit.chemapp W/System.err﹕ at okio.RealBufferedSink.emitCompleteSegments(RealBufferedSink.java:176)
09-10 23:29:47.677  25742-27156/in.definexit.chemapp W/System.err﹕ at okio.RealBufferedSink.write(RealBufferedSink.java:46)
09-10 23:29:47.677  25742-27156/in.definexit.chemapp W/System.err﹕ at com.squareup.okhttp.internal.http.HttpConnection$FixedLengthSink.write(HttpConnection.java:302)
09-10 23:29:47.677  25742-27156/in.definexit.chemapp W/System.err﹕ at okio.RealBufferedSink.emitCompleteSegments(RealBufferedSink.java:176)
09-10 23:29:47.677  25742-27156/in.definexit.chemapp W/System.err﹕ at okio.RealBufferedSink.write(RealBufferedSink.java:96)
09-10 23:29:47.679  25742-27156/in.definexit.chemapp W/System.err﹕ at com.squareup.okhttp.RequestBody$2.writeTo(RequestBody.java:96)
09-10 23:29:47.679  25742-27156/in.definexit.chemapp W/System.err﹕ at com.squareup.okhttp.MultipartBuilder$MultipartRequestBody.writeOrCountBytes(MultipartBuilder.java:277)
09-10 23:29:47.682  25742-27156/in.definexit.chemapp W/System.err﹕ at com.squareup.okhttp.MultipartBuilder$MultipartRequestBody.writeTo(MultipartBuilder.java:297)
09-10 23:29:47.682  25742-27156/in.definexit.chemapp W/System.err﹕ at com.squareup.okhttp.internal.http.HttpEngine$NetworkInterceptorChain.proceed(HttpEngine.java:887)
09-10 23:29:47.682  25742-27156/in.definexit.chemapp W/System.err﹕ at com.squareup.okhttp.internal.http.HttpEngine.readResponse(HttpEngine.java:749)
09-10 23:29:47.682  25742-27156/in.definexit.chemapp W/System.err﹕ at com.squareup.okhttp.Call.getResponse(Call.java:268)
09-10 23:29:47.684  25742-27156/in.definexit.chemapp W/System.err﹕ at com.squareup.okhttp.Call$ApplicationInterceptorChain.proceed(Call.java:224)
09-10 23:29:47.685  25742-27156/in.definexit.chemapp W/System.err﹕ at com.squareup.okhttp.Call.getResponseWithInterceptorChain(Call.java:195)
09-10 23:29:47.686  25742-27156/in.definexit.chemapp W/System.err﹕ at com.squareup.okhttp.Call.execute(Call.java:79)
09-10 23:29:47.686  25742-27156/in.definexit.chemapp W/System.err﹕ at in.definexit.chemapp.BGServerScripts.doInBackground(BGServerScripts.java:112)
09-10 23:29:47.686  25742-27156/in.definexit.chemapp W/System.err﹕ at in.definexit.chemapp.BGServerScripts.doInBackground(BGServerScripts.java:27)
09-10 23:29:47.686  25742-27156/in.definexit.chemapp W/System.err﹕ at android.os.AsyncTask$2.call(AsyncTask.java:292)
09-10 23:29:47.686  25742-27156/in.definexit.chemapp W/System.err﹕ at java.util.concurrent.FutureTask.run(FutureTask.java:237)
09-10 23:29:47.687  25742-27156/in.definexit.chemapp W/System.err﹕ at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
09-10 23:29:47.687  25742-27156/in.definexit.chemapp W/System.err﹕ at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
09-10 23:29:47.687  25742-27156/in.definexit.chemapp W/System.err﹕ at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
09-10 23:29:47.687  25742-27156/in.definexit.chemapp W/System.err﹕ at java.lang.Thread.run(Thread.java:818)
09-10 23:29:47.687  25742-27156/in.definexit.chemapp W/System.err﹕ Caused by: java.net.SocketException: Socket closed
09-10 23:29:47.690  25742-27156/in.definexit.chemapp W/System.err﹕ at libcore.io.Posix.sendtoBytes(Native Method)
09-10 23:29:47.690  25742-27156/in.definexit.chemapp W/System.err﹕ at libcore.io.Posix.sendto(Posix.java:206)
09-10 23:29:47.690  25742-27156/in.definexit.chemapp W/System.err﹕ at libcore.io.BlockGuardOs.sendto(BlockGuardOs.java:278)
09-10 23:29:47.691  25742-27156/in.definexit.chemapp W/System.err﹕ at libcore.io.IoBridge.sendto(IoBridge.java:513)
09-10 23:29:47.691  25742-27156/in.definexit.chemapp W/System.err﹕ at java.net.PlainSocketImpl.write(PlainSocketImpl.java:504)
09-10 23:29:47.691  25742-27156/in.definexit.chemapp W/System.err﹕ at java.net.PlainSocketImpl.access$100(PlainSocketImpl.java:37)
09-10 23:29:47.691  25742-27156/in.definexit.chemapp W/System.err﹕ at java.net.PlainSocketImpl$PlainSocketOutputStream.write(PlainSocketImpl.java:266)
09-10 23:29:47.691  25742-27156/in.definexit.chemapp W/System.err﹕ at okio.Okio$1.write(Okio.java:80)
09-10 23:29:47.691  25742-27156/in.definexit.chemapp W/System.err﹕ at okio.AsyncTimeout$1.write(AsyncTimeout.java:155)
09-10 23:29:47.692  25742-27156/in.definexit.chemapp W/System.err﹕ ... 22 more

Answer 1

您正在使用Base64发送图像。Base64基本上是二进制数据的ASCII表示，它允许我们将数据嵌入到文本流中，比如JSON，但是还应该注意，在使用它时，数据的大小会增加。您之所以获得SocketTimeoutException，是因为数据很大，上传调用没有在超时前完成，或者网络速度慢，图像没有在指定时间内上传。

使用multipart/form-data是HTTP请求中传输二进制文件的标准方式。使用这种方法总是更好，除非这样做有一些限制。