android上传大文件oom,使用又拍云 Android SDK上传多文件时报 oom

错误日志：

java.lang.OutOfMemoryError

java.io.ByteArrayOutputStream.expand(ByteArrayOutputStream.java:91)

java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:201)

com.loopj.android.http.SimpleMultipartEntity.addPart(SimpleMultipartEntity.java:139)

com.loopj.android.http.RequestParams.createMultipartEntity(RequestParams.java:515)

com.loopj.android.http.RequestParams.getEntity(RequestParams.java:447)

com.loopj.android.http.AsyncHttpClient.paramsToEntity(AsyncHttpClient.java:1310)

com.loopj.android.http.AsyncHttpClient.post(AsyncHttpClient.java:925)

com.loopj.android.http.AsyncHttpClient.post(AsyncHttpClient.java:912)

com.upyun.block.api.http.HttpManager.doMutipartPost(HttpManager.java:52)

com.upyun.block.api.main.BlockUploader.nextTask(BlockUploader.java:205)

com.upyun.block.api.main.BlockUploader.access$6(BlockUploader.java:84)

com.upyun.block.api.main.BlockUploader$1.result(BlockUploader.java:110)

com.upyun.block.api.http.ResponseHandler.onSuccess(ResponseHandler.java:29)

com.loopj.android.http.AsyncHttpResponseHandler.handleMessage(AsyncHttpResponseHandler.java:311)

com.loopj.android.http.AsyncHttpResponseHandler$ResponderHandler.handleMessage(AsyncHttpResponseHandler.java:138)

android.os.Handler.dispatchMessage(Handler.java:102)

android.os.Looper.loop(Looper.java:136)

android.app.ActivityThread.main(ActivityThread.java:5336)

java.lang.reflect.Method.invokeNative(Native Method)

java.lang.reflect.Method.invoke(Method.java:515)

com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:871)

com.android.internal.os.ZygoteInit.main(ZygoteInit.java:687)

dalvik.system.NativeStart.main(Native Method)