Android Amazon S3 上传崩溃

Question

我试图找出在 Amazon S3 存储桶上上传时发生崩溃的原因。

日志是:

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean com.amazonaws.mobileconnectors.s3.transferutility.TransferService$NetworkInfoReceiver.isNetworkConnected()' on a null object reference
   at com.amazonaws.mobileconnectors.s3.transferutility.TransferService.execCommand(TransferService.java:287)
   at com.amazonaws.mobileconnectors.s3.transferutility.TransferService$UpdateHandler.handleMessage(TransferService.java:224)
   at android.os.Handler.dispatchMessage(Handler.java:102)
   at android.os.Looper.loop(Looper.java:145)
   at android.os.HandlerThread.run(HandlerThread.java:61)

我的代码有问题吗？

public AmazonTransferUtility uploadFileToAmazonS3(String data, Date date){

    generateTextFileFromString(data, date);

    File jsonFile = new File(getDataPath(), textName);

    TransferObserver observer = transferUtility.upload(
            textBucketName,
            mUUID + File.separator + date.getTime() + textName ,
            jsonFile
    );
    mListener.onAsyncStart();

    observer.setTransferListener(new TransferListener() {
        @Override
        public void onStateChanged(int id, TransferState state) {
            try {
                if (state.toString().equals("COMPLETED")) {
                    deleteFile(textName);
                    if (mListener != null) {
                        JSONObject result = new JSONObject();
                        result.put("result", state.toString());
                        mListener.onAsyncSuccess(result);
                    }
                }
                else if (state.toString().equals("FAILED") ||
                        state.toString().equals("UNKNOWN")
                        ){
                    mListener.onAsyncFail(id, state.toString());
                }
                else{
                    Log.i(TAG, "S3 TransferState :" + state.toString());
                }
            }catch (JSONException e){
                 Log.e(TAG, e.getLocalizedMessage());
            }
        }

        @Override
        public void onProgressChanged(int id, long bytesCurrent, long bytesTotal) {
            if (bytesCurrent == bytesTotal){
                Log.i(TAG, "Completed");
            }
            else{
               Log.i(TAG, "Current bytes: " + bytesCurrent + " Of bytesTotal : " + bytesTotal);
            }
        }

        @Override
        public void onError(int id, Exception ex) {
            mListener.onAsyncFail(id,ex.getMessage());
        }
    });
    return this;
}

如果有的话，我怎样才能捕获这个错误，以便我的应用程序停止崩溃并取消我的上传任务。

顺便说一句。

该崩溃是间歇性的，成功同步的比例为五分之一

Answer 1

这似乎不是您正在做的事情，它位于 AWS SDK 代码中。该 NPE 的含义是一个不稳定的网络。 It's been reported to Amazon on github (和 confirmed in another ticket )并且似乎回滚了 SDK 中的一个版本 (v2.2.13)可能有帮助。

这也是makes sense given the changes made in 2.2.14, which are related to S3 transfer and the network .

我建议关注这些票证(请不要+1)。可以合理地预期他们会在一周内修复它。