NDK support is an experimental features and all use cases are not yet supported error in Android Studio?

Question

I want to integrate NDK into Android studio but i am facing NDK support is an experimental feature and use cases are not yet supported error.I have downloaded NDK using the SDK manager and the NDK is palced C:\Users\The\AppData\Local\Android\Sdk\ndk-bundle. I have also created NativePanorama java class for Java and C++ interaction. Here is the code for the NativePanorama.java class

     public class NativePanorama {



     public native static void processPanorama(long[] imageAddressArray,
                                                  long outputAddress);
        {

        }
}

I used the javah command in the terminal to create the corresponding C++ header for the processPanorama method in the NativePanorama java class. Here is the created com_example_the_myapplication_NativePanorama.h c++ header file.

/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>

    /* Header for class com_example_the_myapplication_NativePanorama */

    #ifndef _Included_com_example_the_myapplication_NativePanorama
    #define _Included_com_example_the_myapplication_NativePanorama
    #ifdef __cplusplus
    extern "C" {
    #endif
    /*
     * Class:     com_example_the_myapplication_NativePanorama
     * Method:    processPanorama
     * Signature: ([JJ)V
     */
    JNIEXPORT void JNICALL Java_com_example_the_myapplication_NativePanorama_processPanorama
    (JNIEnv *, jclass, jlongArray, jlong);

    #ifdef __cplusplus
    }
    #endif
    #endif

Here is also the com_example_the_myapplication_NativePanorama.cpp c++ source file.

#include "com_example_panorama_NativePanorama.h"
JNIEXPORT void JNICALL
Java_com_example_panorama_NativePanorama_processPanorama
(JNIEnv * env, jclass clazz, jlongArray imageAddressArray, jlong
outputAddress){
}  

May be the error is in the build.gradle file here is my build.gradle(app) file

import org.apache.tools.ant.taskdefs.condition.Os
apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.3"

    defaultConfig {
        applicationId "com.example.the.myapplication"
        minSdkVersion 19
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    // begin NDK OPENCV
    sourceSets.main {
        jni.srcDirs = [] //disable automatic ndk-build call
    }
    task ndkBuild(type: Exec, description: 'Compile JNI source via NDK') {
        def rootDir = project.rootDir
        def localProperties = new File(rootDir, "local.properties")
        Properties properties = new Properties()
        localProperties.withInputStream { instr ->
            properties.load(instr)
        }
        def ndkDir = properties.getProperty('ndk.dir')
        if (Os.isFamily(Os.FAMILY_WINDOWS)) {
            commandLine "$ndkDir\\ndk-build.cmd",
                    'NDK_PROJECT_PATH=build/intermediates/ndk',
                    'NDK_LIBS_OUT=src/main/jniLibs',
                    'APP_BUILD_SCRIPT=src/main/jni/Android.mk',
                    'NDK_APPLICATION_MK=src/main/jni/Application.mk'
        } else {
            commandLine "$ndkDir/ndk-build",
                    'NDK_PROJECT_PATH=build/intermediates/ndk',
                    'NDK_LIBS_OUT=src/main/jniLibs',
                    'APP_BUILD_SCRIPT=src/main/jni/Android.mk',
                    'NDK_APPLICATION_MK=src/main/jni/Application.mk'
        }
    }
    tasks.withType(JavaCompile) {
        compileTask -> compileTask.dependsOn ndkBuild
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.4.0'
    compile project(":opencv-java")
}

There is also Reports native method declaration in java where no corresponding jni function is found in the project error in the NativePanorama.java class.

How can i fix those problem?

Answer 1

Here's the solution:

Update your Android Studio to either the latest version or to the latest public pre-release version.

Android Studio 2.2.1 is currently the latest version and it has proper C++ support build in. They're still working on it and some things might still be unsupported, but using C++ is definetly working better on a newer version. Ofcourse also make sure to keep your Android SDK up to date.