Android将“.c”后缀名改为“.cpp”时java调用native失败及“error: base operand of '->' has non-poin

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现象：“.c”后缀名改为“.cpp”时java调用native失败?。

解决：?加入“ extern "C" ”。??

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现象：“error: base operand of '->' has non-pointer type '_JNIEnv'”错误。???

解决：?将“(*env)->NewStringUTF(env, "HelloWorld from JNI !");”改为“env->NewStringUTF("HelloWorld from JNI !")”。

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例子：

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#include <stdio.h>#include <string.h>#include <android/log.h>#include <jni.h>#ifdef __cplusplusextern "C"{#endifjint Java_com_duicky_MainActivity_add(JNIEnv* env, jobject thiz, jint x, jint y){//该方法为打印的方法__android_log_print(ANDROID_LOG_INFO, "JNIMsg", "Get Param:  x=%d y=%d ", x, y);int iRet = x + y;return iRet;}jstring Java_com_duicky_MainActivity_getString(JNIEnv* env, jobject thiz){jstring strRet = env->NewStringUTF("HelloWorld from JNI !");return strRet;}#ifdef __cplusplus}#endif

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