Android-NDK "java.lang.UnsatisfiedLinkError"

I am new to NDK and as well as c, c++. so If I am mistaken please forgive me.

The error in Log cat I am getting is java.lang.UnsatisfiedLinkError After ndk-build I can see the libfirst-opengl.so library in lib folder

Hear is my code for JAVA

public class MainActivity extends Activity { private GLSurfaceView mGLSurfaceView; /** Called when the activity is first created. */ static{ System.loadLibrary("first-opengl"); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Set window full screen and remove title bar this.requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); // Create the EGL surface (set OpenGL version 2.0) and override the // renderer with our custom one mGLSurfaceView = new GLSurfaceView(this); mGLSurfaceView.setEGLContextClientVersion(2); mGLSurfaceView.setRenderer(new MySurfaceViewRenderer()); setContentView(mGLSurfaceView); } @Override public void onPause() { super.onPause(); mGLSurfaceView.onPause(); } @Override public void onResume() { super.onResume(); mGLSurfaceView.onResume(); } public class MySurfaceViewRenderer implements Renderer { public void onSurfaceCreated(GL10 unused, EGLConfig config) { JNIOnSurfaceCreated(); } public void onSurfaceChanged(GL10 unused, int w, int h) { JNIOnSurfaceChanged(w, h); } public void onDrawFrame(GL10 unused) { JNIOnDrawFrame(); } private native void JNIOnSurfaceCreated(); private native void JNIOnSurfaceChanged(int w, int h); private native void JNIOnDrawFrame(); } } 

code for C++ file is..

#include <jni.h> #include <string.h> #include <GLES2/gl2.h> #include <GLES2/gl2ext.h> #include <stdio.h> #include <stdlib.h> #include <android/log.h> #define LOG_TAG "opengl-first" #define LOGI(...) __android_log_print(ANDROID_LOG_INFO,LOG_TAG,__VA_ARGS__) #define LOGE(...) __android_log_print(ANDROID_LOG_ERROR,LOG_TAG,__VA_ARGS__) void surfaceCreated(){ const GLubyte* puiOpenGLVersion = glGetString(GL_VERSION); LOGI("OpenGL Version: \"%s\"\n", (char*)puiOpenGLVersion); } void surfaceChanged(int w, int h){ LOGI("JNIOnSurfaceChanged %dx%d\n", w, h); glViewport(0, 0, w, h); } void drawFrame(){ // Clear the screen to a random shade of grey float fColor = (float)(rand() % 256) / 255.0f; glClearColor(fColor, fColor, fColor, 1.0f); glClear(GL_COLOR_BUFFER_BIT); } extern "C" { JNIEXPORT void JNICALL Java_com_nix_opendk_MainActivity_JNIOnDrawFrame(JNIEnv* env, void* reserved); JNIEXPORT void JNICALL Java_com_nix_opendk_MainActivity_JNIOnSurfaceChanged(JNIEnv* env, void* reserved, int w, int h); JNIEXPORT void JNICALL Java_com_nix_opendk_MainActivity_JNIOnSurfaceCreated(JNIEnv* env, void* reserved); }; JNIEXPORT void JNICALL Java_com_nix_opendk_MainActivity_JNIOnSurfaceCreated(JNIEnv* env, void* reserved) { surfaceCreated(); } JNIEXPORT void JNICALL Java_com_nix_opendk_MainActivity_JNIOnSurfaceChanged(JNIEnv* env, void* reserved, int w, int h) { surfaceChanged(w,h); } JNIEXPORT void JNICALL Java_com_nix_opendk_MainActivity_JNIOnDrawFrame(JNIEnv* env, void* reserved) { drawFrame(); } 

and My make file:-

LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_LDLIBS := -llog -lGLESv2 LOCAL_CFLAGS := -Werror LOCAL_MODULE := first-opengl LOCAL_SRC_FILES := opengl-first.cpp include $(BUILD_SHARED_LIBRARY) 

I wasn't aware of the part which is genrating error so I have added my all code

please help me with that.

Thank you