android ::JNI WARNING illegal start byte0xxx

blog.csdn.net/livingpark

导致这一错误是android中chechjni.c里面的函数static void checkUtfString(JNIEnv* env, const char* bytes, bool nullOk,
const char* func)对字符串进行检查，不符合它的标准就回出错。

解决方法是使用字符串之前进行转换，使字符串符合要求，以下函数是一种方案，根据checkUtfString函数改写。

int char2UTF(char* cp)
{
char* bytes;
bytes = cp;
while (*bytes != '/0')
{
unsigned char utf8 = *(bytes++);
// Switch on the high four bits.
switch (utf8 >> 4) {
case 0x00:
case 0x01:
case 0x02:
case 0x03:
case 0x04:
case 0x05:
case 0x06:
case 0x07: {
// Bit pattern 0xxx. No need for any extra bytes.
break;
}
case 0x08:
case 0x09:
case 0x0a:
case 0x0b:
case 0x0f: {
/*
* Bit pattern 10xx or 1111, which are illegal start bytes.
* Note: 1111 is valid for normal UTF-8, but not the
* modified UTF-8 used here.
*/
LOGW("JNI WARNING: illegal start byte 0x%x/n", utf8);
*((unsigned char *)(bytes-1)) = 0x3f;
break;
}
case 0x0e: {
// Bit pattern 1110, so there are two additional bytes.
utf8 = *(bytes++);
if ((utf8 & 0xc0) != 0x80) {
LOGW("JNI WARNING: illegal continuation byte 0x%x/n", utf8);
*((unsigned char *)(bytes-1)) = 0x80;
}
// Fall through to take care of the final byte.
}
case 0x0c:
case 0x0d: {
// Bit pattern 110x, so there is one additional byte.
utf8 = *(bytes++);
if ((utf8 & 0xc0) != 0x80) {
LOGW("JNI WARNING: illegal continuation byte 0x%x/n", utf8);
*((unsigned char *)(bytes-1)) = 0x80;
}
break;
}
}
}

return 0;
}

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