我已經設法編譯下面的代碼,我想知道它是否正確,並且您給我舉例說明如何在android的MainActivity中調用壓縮函數。如何在MainActivity上調用ndk函數
#include <jni.h>
#include<Principal.h>
JNIEXPORT jint JNICALL
JAVA_com_pfc_camera_ndkmain_MainActivity_compresion(JNIEnv* env,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 = (jstring)env->GetObjectArrayElement(jargv, i); //A Java string
const char *pjc = env->GetStringUTFChars(js,NULL); //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();
//main(argc, argv);
//Now free the array
for(i=0;i<argc;i++)
delete [] argv[i];
delete [] argv;
return 0;
}
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對不起我的英語不是很好 – Gigasnike95