#NDK sample project

##How to create and build jni with NDK on Android Studio

1. use [command+,] to open Preferences，than select External Tools
2. add javah, ndk-build, ndk-build clean as External Tools

• Configure javah
  name: javah
  options: select all
  Show in: select all
  Program: $JDKPath$/bin/javah
  Paramaters: -classpath $Calsspath$ -v -jin $FileClass$
  Working directory: $SourcepathEntry$/../jin

• Configure ndk-build
  name: ndk-build
  options: select all
  Show in: select all
  Program: /home/logan/Android/Sdk/ndk-bundle/ndk-build
  Paramaters:
  Working directory: $ProjectFileDir$/app/src/main

• Configure ndk-build clean
  name: ndk-build clean
  options: select all
  Show in: select all
  Program: /home/logan/Android/Sdk/ndk-bundle/ndk-build
  Paramaters: clean
  Working directory: $ProjectFileDir$/app/src/main

3. Configure build.gradle

android {
  ...
  defaultConfig {
    ...
    ndk {
      moduleName "your dllname"
    }

    sourceSets.main {
      jni.srcDirs = []
      jniLibs.srcDir "src/main/libs"
    }
    ...
  }
  ...
  ```
}

4. add one line in 'gradle.properties'
```properties
android.useDeprecatedNdk=true

5. Create some MakeFiles

• Application.mk

  APP_MODULES := YourLibrary
  APP_ABI := all

• Android.mk

  LOCAL_PATH := $(call my-dir)
  include $(CLEAR_VARS)
  LOCAL_MODULE := YourLibrary
  LOCAL_SRC_FILES =: YourLibrary.cpp
  include $(BUILD_SHARED_LIBRARY)