java io file文件写入到sd卡操作

fos = new FileOutputStream(ApkFile);

int count = 0;

byte buf[] = new byte[1024];

do {

int numread = is.read(buf);

count += numread;

if (numread <= 0) {

Log.d(tag, "测试-数据成功下载");

break;

}

fos.write(buf, 0, numread);

} while (true);*/