Android Studio NDK Development

Clean up Eclipse's NDK development and then organize your Android studio.

A relatively good Baidu network disk: http://pan.baidu.com/share/home?uk=2383159761 often update the latest Android development package, you can download to the NDK package

Create an Android project, put a textview for displaying text, function is simple, get the string from the native layer and display it on the TextView

Then write the relevant code:

 Public classMainactivityextendsappcompatactivity{//Load so    Static{system.loadlibrary ("Myjni"); }    //declaring a local method     Public nativeString GetString (); @Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (R.layout.activity_main); TextView TextView=(TextView) Findviewbyid (R.ID.TEXTVIEWID);    Textview.settext (GetString ()); }}

1. Select the menu build-->build APK and use command line cmd to enter the Android project \app\src\main\java directory to generate the. h header File

Javah-d. /JNI package name. Main Activit Name

such as: javah-d. /jni Com.example.eclipsendk.MainActivit

2. In the Project Catalog column Jni folder right----C/c++source File

Fill in the file name, select the. C file (do not generate a header file), and if you use a. cpp file, remember the extern "C"

3. Write the native layer code, in MyJni.cpp

#include"Test_com_androidstudiondk_mainactivity.h"//Copy the function declaration from the file.jniexport jstring jnicall java_test_com_androidstudiondk_mainactivity_getstring (JNIEnv*env, Jobject obj) {    //. c files are used in this way    return(*env)->newstringutf (env,"Hello Android Studio NDK"); //. cpp files are used in this way//return Env->->newstringutf ("Hello Android Studio NDK");}

4. Then add the contents of several files

①. local.properties file, adding the path to the NDK

②. gradle.properties file declaration using the NDK

Android.usedeprecatedndk=true

③. The name of the Build.gradle file in the app directory.

You can toggle the view from here

④. After the changes are complete, compile the apk and put it into the emulator to run.

Debug version (Build APK) generated in: app\build\outputs\apk directory

Release version (Generate signed APK) generated in: App Directory

Android Studio NDK Development