Eclipse首选项中Android NDK的无效路径

Question

I'm looking to incorporate the NDK for C++ code use in my Android project. I'm using Eclipse Android IDE and I've just downloaded android-ndk-r9-darwin-x86_64.tar.bz2 for OSX 64bit. I've uncompressed the ndk and have it in my home folder, but when I attempt to setup the path inside Eclipse prefs, I get this error

I've looked at this similar question ( Eclipse error: invalid path for ndk? ) for answers, but every suggestion didn't solve the problem. Other relevant information, I have Make 3.8.1, up-to-date SDK, Sequoyah.

Answer 1

I had the same problem and documented the solution to this problem. It are the first 2 steps of the next link you'll need: http://aplacetogeek.wordpress.com/android-with-opencl-tutorial/

Edit:

The solution is this:

Step 1: setup Android NDK

1. Download the NDK from: http://developer.android.com/tools/sdk/ndk/index.html
2. I unzipped it in the adt-bundle but you can unzip it anywhere you want. Note or remember the path you used. I'll need it in the next steps!
3. Go to Window -> Preferences -> Android -> NDK
4. Browse to android-ndk-r9c. Example: /home/dries/AndroidDev/adt-bundle-linux-x86_64-20131030/android-ndk-r9c
5. Click apply and ok

Step 2: configure Android NDK for your project

1. Right click on your project folder. Choose android tools -> add native support (! the bottom one !) and click finish.
2. The file you just created is going to be your own .so file. This will be your personal library with the functions you create yourself in the JNI folder.
3. Now you should see a JNI folder in your project with a .cpp and an Android.mk file in it.

4. Go to project -> properties -> C/C++ build -> build variables -> add

   Name: NDKROOT

   Value: your android-ndk-r9c folder you also added to NDK in step 1.

5. Click Ok

6. Go to C/C++ build and uncheck Use default build path. Change the build path to ${NDKROOT}/ndk-build . Make sure you did not end the NDKROOT value on / !
7. Click apply

You should be able to use the NDK now and compile without errors.

Answer 2

Found a work-around solution to my question with the help from this forum: https://groups.google.com/forum/#!topic/android-ndk/YPFPa9Fen7Y

I downloaded an old copy of the NDK (r5b) and there were no errors when setting up the path, as opposed to r9 the most recent version. As the forum says, the problem lies with Sequoyah which has not updated since 2011 and can not recognize the new structure of that the NDK is laid out in. Hope this helps someone in the future. (If you find a direct solution though, let me know.)

Answer 3

Instead of downloading another version of the NDK, I simply created links inside the build folder to the toolchains , prebuilt and platforms which recreates the folder hierarchy of the r4 NDK.

Doing this made the plugin happy, and I only have one version of the NDK on my computer.