Android Download Manager api下载失败（“下载失败”）

Question

在某些情况下，当尝试使用Android sink('analysis-output.txt') week = "002" cat("*** ",week,"\n") obs <- read.table(paste(week,"obs.txt",sep="-"),sep="\t", header=FALSE) per <- read.table(paste(week,"per.txt",sep="-"),sep="\t", header=FALSE) n <- length(obs) mper <- AdjacencyFromEdgelist(per, check.full = TRUE) mobs <- AdjacencyFromEdgelist(obs, check.full = TRUE) g<-array(c(mper[[1]],mobs[[1]]),c(n,n,2)) q<-qaptest(g,gcor,g1=1,g2=2) summary(q) sink() 下载文件时，下载失败，并且下载通知显示“下载失败”。

Answer 1

经过几个小时的调试，我意识到传递给下载管理器的一些标头是*** 002 QAP Test Results Estimated p-values: p(f(perm) >= f(d)): 0.355 p(f(perm) <= f(d)): 0.656 Test Diagnostics: Test Value (f(d)): -0.09045692 Replications: 1000 Distribution Summary: Min: -0.207416 1stQ: -0.1971768 Med: -0.1720356 Mean: 0.01895663 3rdQ: 0.1185298 Max: 0.9982945 。尤其是“用户代理”，当发生这种情况时，下载管理器会发布一条通知，指出“下载失败”。

DownloadManager