9. Debug cpp module in Android studio

STEPS:

1. open project in android studio;
2. select Android Node,not Project Node,
3. select app tree root node,and click the mouse right button,
   get the menu lists;
4. click ‘Link c++ project with Gradle’ from the menu
   the show the configure window
5. if the *.mk file is Ok,choose ndk-build for Build system;
   then choose the file ‘Android.mk’ in the project path;
6. press ok,add the mk config into the build.gradle;

   android {
   
     compileSdkVersion 26
     defaultConfig {
       applicationId "com.map.cycle"
       minSdkVersion 21
       targetSdkVersion 26
       versionCode 1
       versionName "1.0"
       testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
       multiDexEnabled true
       ndk {
         abiFilters "armeabi-v7a"
       }
     }
     externalNativeBuild {
       ndkBuild {
         path file('../../code/build/map/jni/Android.mk')
       }
     }
   }