JNI数据转换

jbyteArray 转换为 c的 unsigned char *

jint Java_cn_hongdameng_aacencoder_AacEncoder_AacWrite(JNIEnv* env,jobject this,jbyteArray jBuffer, jint jBufferSize)
{
   jbyte* bBuffer = (*env)->GetByteArrayElements(env,jBuffer,0);
   unsigned char* buf=(unsigned char*)bBuffer;
...................
}

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unsigned char * 转换为 jbyteArray

unsigned char *img;
...................
jbyte *by = reinterpret_cast<jbyte*>(img);
jbyteArray jarray = env->NewByteArray(length);
env->SetByteArrayRegion(jarray, 0, length, by);

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