Android JNI calls instance, you need to compile the c file before calling the target platform, and then put jni directory

JniApplication
..............\.gitignore
..............\.gradle
..............\.......\2.4
..............\.......\...\taskArtifacts
..............\.......\...\.............\cache.properties
..............\.......\...\.............\cache.properties.lock
..............\.......\...\.............\fileHashes.bin
..............\.......\...\.............\fileSnapshots.bin
..............\.......\...\.............\outputFileStates.bin
..............\.......\...\.............\taskArtifacts.bin
..............\.idea
..............\.....\.name
..............\.....\compiler.xml
..............\.....\copyright
..............\.....\.........\profiles_settings.xml
..............\.....\encodings.xml
..............\.....\gradle.xml
..............\.....\libraries
..............\.....\.........\appcompat_v7_23_0_1.xml
..............\.....\.........\support_annotations_23_0_1.xml
..............\.....\.........\support_v4_23_0_1.xml
..............\.....\misc.xml
..............\.....\modules.xml
..............\.....\runConfigurations.xml
..............\.....\vcs.xml
..............\.....\workspace.xml
..............\app
..............\...\.gitignore
..............\...\app.iml
..............\...\build
..............\...\.....\generated
..............\...\.....\.........\res
..............\...\.....\.........\...\rs
..............\...\.....\.........\...\..\androidTest
..............\...\.....\.........\...\..\...........\debug
..............\...\.....\.........\...\..\debug
..............\...\.....\.........\source
..............\...\.....\.........\......\aidl
..............\...\.....\.........\......\....\androidTest
..............\...\.....\.........\......\....\...........\debug
..............\...\.....\.........\......\....\debug
..............\...\.....\.........\......\buildConfig
..............\...\.....\.........\......\...........\androidTest
..............\...\.....\.........\......\...........\...........\debug
..............\...\.....\.........\......\...........\...........\.....\com
..............\...\.....\.........\......\...........\...........\.....\...\cheney
..............\...\.....\.........\......\...........\...........\.....\...\......\jniapplication
..............\...\.....\.........\......\...........\...........\.....\...\......\..............\test
..............\...\.....\.........\......\...........\...........\.....\...\......\..............\....\BuildConfig.java
..............\...\.....\.........\......\...........\debug
..............\...\.....\.........\......\...........\.....\com
..............\...\.....\.........\......\...........\.....\...\cheney
..............\...\.....\.........\......\...........\.....\...\......\jniapplication
..............\...\.....\.........\......\...........\.....\...\......\..............\BuildConfig.java
..............\...\.....\.........\......\r
..............\...\.....\.........\......\.\androidTest
..............\...\.....\.........\......\.\...........\debug
..............\...\.....\.........\......\.\debug
..............\...\.....\.........\......\.\.....\android
..............\...\.....\.........\......\.\.....\.......\support
..............\...\.....\.........\......\.\.....\.......\.......\v7
..............\...\.....\.........\......\.\.....\.......\.......\..\appcompat
..............\...\.....\.........\......\.\.....\.......\.......\..\.........\R.java
..............\...\.....\.........\......\.\.....\com
..............\...\.....\.........\......\.\.....\...\cheney
..............\...\.....\.........\......\.\.....\...\......\jniapplication
..............\...\.....\.........\......\.\.....\...\......\..............\R.java
..............\...\.....\.........\......\rs
..............\...\.....\.........\......\..\androidTest
..............\...\.....\.........\......\..\...........\debug
..............\...\.....\.........\......\..\debug
..............\...\.....\intermediates
..............\...\.....\.............\assets
..............\...\.....\.............\......\androidTest
..............\...\.....\.............\......\...........\debug
..............\...\.....\......

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