Android Native注册

JNI_OnLoad中注册

// NativeOnLoad.cpp
#include <jni.h>

extern jint register_com_example_anative_HardwareName(JNIEnv*);

jint JNI_OnLoad(JavaVM *vm, void *reserved) {
    JNIEnv *env = NULL;

    if (vm->GetEnv((void **) &env, JNI_VERSION_1_4) != JNI_OK) {
        return JNI_ERR;
    }

    if (register_com_example_anative_HardwareName(env)) {
        return JNI_ERR;
    }

    return JNI_VERSION_1_4;
}

env->RegisterNatives注册函数

#include <jni.h>

jstring com_example_anative_HardwareName_getName(JNIEnv *env, jobject thiz) {

    return env->NewStringUTF("Hello from c++");
}

// native 方法
static JNINativeMethod gMethods[] = {
        {"getName", "()Ljava/lang/String;",
                (void *) com_example_anative_HardwareName_getName},
};

int register_com_example_anative_HardwareName(JNIEnv *env) {
    jclass clazz = env->FindClass("com/example/anative/HardwareName");

    return env->RegisterNatives(clazz, gMethods,
                                sizeof(gMethods) / sizeof(JNINativeMethod));
}

package com.example.anative;

public class HardwareName {

   public native String getName();
}