#include <SoftwareSerial.h>
SoftwareSerial GSM(9, 10); // RX, TX
int sensor=5;
enum _parseState {
PS_DETECT_MSG_TYPE,
PS_IGNORING_COMMAND_ECHO,
PS_HTTPACTION_TYPE,
PS_HTTPACTION_RESULT,
PS_HTTPACTION_LENGTH,
PS_HTTPREAD_LENGTH,
PS_HTTPREAD_CONTENT
};
byte parseState = PS_DETECT_MSG_TYPE;
char buffer[80];
byte pos = 0;
int contentLength = 0;
void resetBuffer() {
memset(buffer, 0, sizeof(buffer));
pos = 0;
}
void sendGSM(const char* msg, int waitMs = 500) {
GSM.println(msg);
delay(waitMs);
while(GSM.available()) {
parseATText(GSM.read());
}
}
void setup()
{
GSM.begin(9600);
Serial.begin(9600);
sendGSM("AT+SAPBR=3,1,\"APN\",\"zongwap\"");
sendGSM("AT+SAPBR=1,1",300);
sendGSM("AT+HTTPINIT");
sendGSM("AT+HTTPPARA=\"CID\",1");
sendGSM("AT+HTTPPARA=\"URL\",\"http://afridiofkh.000webhostapp.com?
sensor1="" + sensor + ""\"""");
sendGSM("AT+HTTPACTION=0");
}
void loop()
{
while(GSM.available()) {
parseATText(GSM.read());
}
}
void parseATText(byte b) {
buffer[pos++] = b;
if ( pos >= sizeof(buffer) )
resetBuffer(); // just to be safe
/*
// Detailed debugging
Serial.println();
Serial.print("state = ");
Serial.println(state);
Serial.print("b = ");
Serial.println(b);
Serial.print("pos = ");
Serial.println(pos);
Serial.print("buffer = ");
Serial.println(buffer);*/
switch (parseState) {
case PS_DETECT_MSG_TYPE:
{
if ( b == '\n' )
resetBuffer();
else {
if ( pos == 3 && strcmp(buffer, "AT+") == 0 ) {
parseState = PS_IGNORING_COMMAND_ECHO;
}
else if ( b == ':' ) {
//Serial.print("Checking message type: ");
//Serial.println(buffer);
if ( strcmp(buffer, "+HTTPACTION:") == 0 ) {
Serial.println("Received HTTPACTION");
parseState = PS_HTTPACTION_TYPE;
}
else if ( strcmp(buffer, "+HTTPREAD:") == 0 ) {
Serial.println("Received HTTPREAD");
parseState = PS_HTTPREAD_LENGTH;
}
resetBuffer();
}
}
}
break;
case PS_IGNORING_COMMAND_ECHO:
{
if ( b == '\n' ) {
Serial.print("Ignoring echo: ");
Serial.println(buffer);
parseState = PS_DETECT_MSG_TYPE;
resetBuffer();
}
}
break;
case PS_HTTPACTION_TYPE:
{
if ( b == ',' ) {
Serial.print("HTTPACTION type is ");
Serial.println(buffer);
parseState = PS_HTTPACTION_RESULT;
resetBuffer();
}
}
break;
case PS_HTTPACTION_RESULT:
{
if ( b == ',' ) {
Serial.print("HTTPACTION result is ");
Serial.println(buffer);
parseState = PS_HTTPACTION_LENGTH;
resetBuffer();
}
}
break;
case PS_HTTPACTION_LENGTH:
{
if ( b == '\n' ) {
Serial.print("HTTPACTION length is ");
Serial.println(buffer);
// now request content
GSM.print("AT+HTTPREAD=0,");
GSM.println(buffer);
parseState = PS_DETECT_MSG_TYPE;
resetBuffer();
}
}
break;
case PS_HTTPREAD_LENGTH:
{
if ( b == '\n' ) {
contentLength = atoi(buffer);
Serial.print("HTTPREAD length is ");
Serial.println(contentLength);
Serial.print("HTTPREAD content: ");
parseState = PS_HTTPREAD_CONTENT;
resetBuffer();
}
}
break;
case PS_HTTPREAD_CONTENT:
{
// for this demo I'm just showing the content bytes in the serial monitor
Serial.write(b);
contentLength--;
if ( contentLength <= 0 ) {
// all content bytes have now been read
parseState = PS_DETECT_MSG_TYPE;
resetBuffer();
}
}
break;
}
}
添加了附加元素的方法。如果我想在特定索引处添加，该怎么做？
我尝试使用这种代码在第0个索引处添加元素。我正在寻找更好的东西，而无需实例化新的com.google.gson.JsonArray。
JsonArray答案 0 :(得分：4)
由于JsonArray没有插入方法，这意味着你必须自己创建。它会在您选择的位置插入数组中的单个项目。
public static JsonArray insert(int index, JsonElement val, JsonArray currentArray) {
JsonArray newArray = new JsonArray();
for (int i = 0; i < index; i++) {
newArray.add(currentArray.get(i));
}
newArray.add(val);
for (int i = index; i < currentArray.size(); i++) {
newArray.add(currentArray.get(i));
}
return newArray;
}
因此，使用此方法，将新项目0插入位置0的现有数组[1,2,3]：
insert(0, new JsonPrimitive(0), myArray);
在不改变原始数组的情况下，该方法将返回一个新数组[0,1,2,3]。希望有所帮助！
答案 1 :(得分：1)
我认为您正在寻找类似的东西，您可以使用下面提到的方法替换特定索引处的现有JsonElement。
JsonElement set（int index，JsonElement element） 用指定的元素替换此数组中指定位置的元素。
供参考：