Read build arguments from NDK code

问题:

I have an NDK file that inject my api key into my app, the code works correctly:

#include <jni.h>  JNIEXPORT jstring JNICALL Java_yt_javi_nftweets_ui_main_MainActivity_getTwitterKey(JNIEnv *env, jobject instance) {      return (*env)->  NewStringUTF(env, "my_twitter_key"); } 

I would like to change my_twitter_key by an custom build argument

externalNativeBuild {   ndkBuild {     arguments "-DTWITTER_API_KEY=my_twitter_key"   } } 

And read that argument inside the method Java_yt_javi_nftweets_ui_main_MainActivity_getTwitterKey

回答1:

You could add a define to your cFlags and stringify it in your C code:

android {     defaultConfig {         externalNativeBuild {             ndkBuild {                 cFlags "-DTWITTER_API_KEY=my_twitter_key"             }         }     } } 

---

#define xstr(s) str(s) #define str(s) #s  ...  return (*env)->NewStringUTF(env, xstr(TWITTER_API_KEY)); 

文章来源: Read build arguments from NDK code