>有人知道如何解决错误吗？
JNIEXPORT jstring JNICALL JAVA_com_pfc_camera_ndkmain_MainActivity_compresion(JNIEnv* env, jobject obj, jobjectArray jargv){
//jargv is a Java array of Java strings
int argc = env->GetArrayLength(jargv);
typedef char *pchar;
pchar *argv = new pchar[argc];
int i;
for(i=0; i<argc; i++)
{
jstring js = env->GetObjectArrayElement(jargv, i); //A Java string
const char *pjc = env->GetStringUTFChars(js); //A pointer to a Java-managed char buffer
size_t jslen = strlen(pjc);
argv[i] = new char[jslen+1]; //Extra char for the terminating null
strcpy(argv[i], pjc); //Copy to *our* buffer. We could omit that, but IMHO this is cleaner. Also, const correctness.
env->ReleaseStringUTFChars(js, pjc);
}
//Call main
Principal *pa=Principal::CreateInstance(argc,argv);
pa->Run();
pa->FreeInstance();
//Now free the array
for(i=0;i<argc;i++)
delete [] argv[i];
delete [] argv;
}
我知道错误可能来自不做铸造，但我不是很清楚
[ https://i.stack.imgur.com/bOWKZ.png][1]
似乎问题已经解决了，现在我得到另一个错误，但我不明白我是否传递了两个参数 js 和 pjc
[ https://i.stack.imgur.com/UHCAR.png][1]
C++ 您必须使用显式转换为所需类型。
jstring js = (jstring)env->GetObjectArrayElement(jargv, i);
您可以了解 jni 编程here
关于您的其他问题，请执行以下操作：
const jbyte *pjc = env->GetStringUTFChars(js, NULL);