1、定义native方法并加载动态链接库：

public class HelloJni extends Activity

{

@Override

public void onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);

TextView tv = new TextView(this);

tv.setText( stringFromJNI() );

setContentView(tv);

}

public native String stringFromJNI();

public native String unimplementedStringFromJNI();

static {

System.loadLibrary("hello-jni");

}

}

2、实现native方法：

#include

#include

jstring

Java_com_example_hellojni_HelloJni_stringFromJNI( JNIEnv* env,

jobject thiz )

{

return (*env)->NewStringUTF(env, "Hello from JNI !"); //in c

return env->NewStringUTF("Hello from JNI !"); //in c++

}

若要定义静态方法：

JNIEXPORT jstring JNICALL Java_com_example_hellojni_HelloJni_stringFromJNI (JNIEnv * env, jclass clazz);