Ubuntu 12.04 64位 -- eclipse新建android项目没有R文件

【遇到的问题】   Ubuntu 12.04 64位 --  eclipse新建android项目没有R文件 。

【问题描述】   clean 没有用。

                      用低版本的API 没有用

                      手动build没有用。

                      控制台报错：../android-sdk-linux/platform-tools/adb:error while loading shared libraries:
        libncurses.so.5: cannot open shared object file No such file or directory

【解决办法1】

“ Interesting, it looks like the assembler program needs libz on the host system.

The issue is probably that the toolchain binaries are 32-bit and you are on a 64-bit system. In this case, you would need to install the 32-bit libz libraries to make the toolchain binaries work. Try the following:

sudo apt-get install lib32z1     ”

网址：https://groups.google.com/forum/?fromgroups=#!topic/android-ndk/swOpuAYqWhA

【解决办法2】

This problem is occurring because the Android SDK is compiled for a 32-bit GNU/Linux system, and your Ubuntu system is a 64-bit GNU/Linux system. The solution should be easy (since Ubuntu fully supports running 32-bit programs on a 64-bit OS)--just install the 32-bit versions of the libraries it needs.

The simplest and easiest way to do this is to install the 32-bit versions of all the most commonly used libraries, by installing the ia32-libs  package. You can do this in the Software Center or in the Terminal with:

sudo apt-get updatesudo apt-get install ia32-libs

Originally ia32-libs was provided because Ubuntu, in its default configuration, didn't support installing 32-bit Ubuntu packages on a 64-bit system. Now that this is fully supported by default, theia32-libs package just causes the same 32-bit packages to be installed on your 64-bit system that would be installed on a minimal 32-bit system. (So for anyone who is worried this might not work now that multarch is supported by default: it still works.)

网址：http://askubuntu.com/questions/147400/problems-with-eclipse-and-android-sdk

虽然还是不是特别清楚其中的问题

但是大概也就是64位 与 32位 的兼容问题吧

基本方法就是下载32位的各种包，然后就好了。。