大家好,我正在开发的应用程序必须显示客户列表,经销商和其他类型的数据,一个ao地理地图(从卫星)或在一个大学的考试路线图。
使用这个应用程序,我必须计算等值线距离和街道路线,在可能的情况下,从源和目的地。
我查看了Google Maps API,但使用Google Maps Data API for Java,我只能操作像标记这样的数据,而且我需要一个企业许可证才能在非web应用程序中进行集成。对于Bing地图也是一样的.
你能给我推荐一个免费的库吗?,我不介意闭源,即使是开源的会更好…
提前感谢每一个人
马可
我正在尝试将Ubuntu服务器上的Java更新为Java 8,但我收到了错误消息,Java不会更新。
error message: Errors where encountered while processing E: Sub-process /usr/bin/dpkg returned an error code (1)
我用:
sudo add-apt-repository ppa:webupd8team/java
然后:
sudo apt update
犯了错误:
Failed to fetch ......binary-amd64/Packages 404 not found
Fai
我试图安装filezilla,但是缺少这个依赖项(libgnutls30 (>= 3.5.3))。在尝试从源代码安装依赖项时,我没有成功。有人能给我建议一下怎么修吗?在安装依赖项时,我能够配置它,使它,但make没有通过。
The following packages have unmet dependencies:
filezilla : Depends: libgnutls30 (>= 3.5.3) but 3.4.10-4ubuntu1.4 is to be installed
E: Unable to correct problems, you have held bro
W: Failed to fetch http: //ppa.launchpad.net/picaso/octave/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http: //ppa.launchpad.net/picaso/octave/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found
W: Failed to fetch http: //ppa.launchpad.net/kilian/f.l
每当我想要更新时,都会出现以下错误:
W:Failed to fetch http://ppa.launchpad.net/sun-java-community-team/sun-java6/ubuntu/dists/precise/main/source/Sources 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/sun-java-community-team/sun-java6/ubuntu/dists/precise/main/binary-amd64/Packages 404 Not Found
这就是它给我的信息:
W:Failed to fetch http://ppa.launchpad.net/sevenmachines/flash/ubuntu/dists/quantal/main/source/Sources 404 Not Found
W:Failed to fetch http://ppa.launchpad.net/sevenmachines/flash/ubuntu/dists/quantal/main/binary-i386/Packages 404 Not Found
E:Some index files failed to download. They
如何在ubuntu11.04中流畅地安装virtualbox-4.1.4?
当apt安装libqt*未满足的依赖。有一长串未满足的依赖。首先从哪里开始,然后使用任何命令流利地安装virtualbox?
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
virtualbox-4.1 : Depends: libcurl3 (>= 7.16.2-1) but it is not going to be ins