Android NDK之如何避開Java_xxx標準定義

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Java代碼：public class MessageUtil {static{System.loadLibrary("sms");}public static native void showToast(Object context,String message);}jni代碼：檔案 -- sms.h//// Created by Mrper on 2015/8/2.//#include <jni.h>#ifndef SENDER_SMS_H#define SENDER_SMS_Hvoid showToast(JNIEnv *env,jclass clazz,jobject handler,jstring message);static jint registeNativeMethods(JNIEnv *env,const char* className,JNINativeMethod *methods,int numMethod);static jint registeNatives(JNIEnv *env);#endif //SENDER_SMS_H檔案 -- sms.cpp//// Created by Mrper on 2015/8/2.//#include "sms.h"#include <stdio.h>static JNINativeMethod nativeMethods[] = {{"showToast","(Ljava/lang/Object;Ljava/lang/String;)V",(void*)showToast}};void showToast(JNIEnv *env,jclass clazz,jobject handler,jstring message){jclass cls_toast = env->FindClass("android/widget/Toast");jmethodID mid_showToast = env->GetStaticMethodID(cls_toast,"makeText","(Landroid/content/Context;Ljava/lang/CharSequence;I)Landroid/widget/Toast;");jobject obj_toast = env->CallStaticObjectMethod(cls_toast,mid_showToast,handler,message,1000);jmethodID mid_show = env->GetMethodID(cls_toast,"show","()V");env->CallVoidMethod(obj_toast,mid_show);}static jint registeNativeMethods(JNIEnv *env,const char* className,JNINativeMethod *methods,int numMethod){jclass clazz;clazz = env->FindClass(className);if (clazz == NULL) return JNI_FALSE;if (env->RegisterNatives(clazz,methods,numMethod) < 0){return JNI_FALSE;}return JNI_TRUE;}static jint registeNatives(JNIEnv *env){if (registeNativeMethods(env,"com/mrper/sender/MessageUtil",nativeMethods,sizeof(nativeMethods)/sizeof(nativeMethods[0]) ) != JNI_TRUE){return JNI_FALSE;}return JNI_TRUE;}jint JNI_OnLoad(JavaVM *vm, void*reserved){jint result = -1;JNIEnv *env;vm->GetEnv((void**)&env,JNI_VERSION_1_6);if (env == NULL){goto fail;}if (registeNatives(env) != JNI_TRUE){goto fail;}result = JNI_VERSION_1_6;fail:return result;}

Android NDK之如何避開Java_xxx標準定義