An example of android jni methods dynamic registration, is very simple, beginners can take a look.

TestScreen
..........\.classpath
..........\.project
..........\AndroidManifest.xml
..........\assets
..........\bin
..........\...\AndroidManifest.xml
..........\...\classes
..........\...\classes.dex
..........\...\.......\com
..........\...\.......\...\thb
..........\...\.......\...\...\testscreen
..........\...\.......\...\...\..........\BuildConfig.class
..........\...\.......\...\...\..........\jni
..........\...\.......\...\...\..........\...\Jni.class
..........\...\.......\...\...\..........\MainActivity.class
..........\...\.......\...\...\..........\R$attr.class
..........\...\.......\...\...\..........\R$drawable.class
..........\...\.......\...\...\..........\R$id.class
..........\...\.......\...\...\..........\R$layout.class
..........\...\.......\...\...\..........\R$string.class
..........\...\.......\...\...\..........\R$style.class
..........\...\.......\...\...\..........\R.class
..........\...\dexedLibs
..........\...\.........\android-support-v4-1b3b30ff9fe51a27e6d6be81c44432ed.jar
..........\...\jarlist.cache
..........\...\res
..........\...\resources.ap_
..........\...\...\crunch
..........\...\...\......\drawable-hdpi
..........\...\...\......\.............\ic_launcher.png
..........\...\...\......\drawable-mdpi
..........\...\...\......\.............\ic_launcher.png
..........\...\...\......\drawable-xhdpi
..........\...\...\......\..............\ic_launcher.png
..........\...\...\......\drawable-xxhdpi
..........\...\...\......\...............\ic_launcher.png
..........\...\TestScreen.apk
..........\gen
..........\...\com
..........\...\...\thb
..........\...\...\...\testscreen
..........\...\...\...\..........\BuildConfig.java
..........\...\...\...\..........\R.java
..........\ic_launcher-web.png
..........\jni
..........\...\Android.mk
..........\...\com_thb_testscreen_jni_Jni.cpp
..........\...\com_thb_testscreen_jni_Jni.h
..........\libs
..........\....\android-support-v4.jar
..........\....\armeabi
..........\....\.......\libscreentest.so
..........\proguard-project.txt
..........\project.properties
..........\res
..........\...\drawable-hdpi
..........\...\.............\ic_launcher.png
..........\...\drawable-ldpi
..........\...\drawable-mdpi
..........\...\.............\ic_launcher.png
..........\...\drawable-xhdpi
..........\...\..............\ic_launcher.png
..........\...\drawable-xxhdpi
..........\...\...............\ic_launcher.png
..........\...\layout
..........\...\......\activity_main.xml
..........\...\values
..........\...\values-v11
..........\...\..........\styles.xml
..........\...\values-v14
..........\...\..........\styles.xml
..........\...\......\strings.xml
..........\...\......\styles.xml
..........\src
..........\...\com
..........\...\...\thb
..........\...\...\...\testscreen
..........\...\...\...\..........\jni
..........\...\...\...\..........\...\Jni.java
..........\...\...\...\..........\MainActivity.java

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