我通过蓝牙将字符串从arduino发送到Android,当字符串到达应用程序时,我创建子字符串以获取我需要的数据。但是,字符串不完整,它们被剪切,因此我无法得到我需要的子字符串。例如:从Arduino我发送这种风格的字符串:
#ecg{21304(2.41~
当我在arduino串行监视器上发送几个字符串时,如下所示:
#ecg{0(137~
#ecg{1(136~
#ecg{3(162~
#ecg{5(221~
#ecg{6(282~
#ecg{8(296~
#ecg{10(259~
#ecg{12(208~
#ecg{13(166~
#ecg{15(141~
#ecg{17(132~
#ecg{19(144~
#ecg{20(194~
#ecg{22(262~
#ecg{24(296~
#ecg{26(267~
#ecg{27(217~
#ecg{29(173~
#ecg{31(143~
但是当他们到达Android时,就会发生这样的事情:
I/System.out: ReadMessage: #ecg{6147 end string
I/System.out: ReadMessage: 0(335~
I/System.out: #ecg{61472(335~
I/System.out: #ecg{61474(273~
I/System.out: #ecg{61476(230~
I/System.out: #ecg{61478(252~
I/System.out: #ecg{61480(307~
I/System.out: #ecg{61483(307~
I/System.out: #ecg{61485(279~
I/System.out: #ecg{61487(306~
I/System.out: #ecg{61488(347~
I/System.out: #ecg{61490(313~
I/System.out: #ecg{61492(249~
I/System.out: #ecg{61494(231~
I/System.out: #ecg{61496(277~
I/System.out: #ecg{61498(320~
I/System.out: #ecg{61500 end string
I/System.out: ReadMessage: (290~
I/System.out: #ecg{61502(284~
I/System.out: #ecg{61504(328~
I/System.out: #ecg{61506(343~
I/System.out: #ecg{61507(283~
I/System.out: #ecg{61509(237~
I/System.out: #ecg{61511(246~
I/System.out: #ecg{61513(303~
I/System.out: #ecg{61515(311~
I/System.out: #ecg{61517(280~
I/System.out: #ecg{61519(301~
I/System.out: #ecg{61521(346~
I/System.out: #ecg{61523(321~
I/System.out: #ecg{61524(258~
I/System.out: #ecg{61527(230~
I/System.out: #ecg{61529( end string
I/System.out: ReadMessage: 269~
I/System.out: #ecg{61531(318~
请注意,从大多数情况下,它们从一开始就没有到达。
我想得到这样的字符串:
I/System.out: ReadMessage: #ecg{61502(284~ end string
I/System.out: ReadMessage: #ecg{61502(284~ end string
I/System.out: ReadMessage: #ecg{61504(328~ end string
I/System.out: ReadMessage: #ecg{61506(343~ end string
I/System.out: ReadMessage: #ecg{61507(283~ end string
因此我无法创建我需要的子串。你知道为什么Strings被切断而且不完整,因为我从arduino发送它们?有什么办法可以解决吗?
可能是不完整的字符串接收是我在Arduino代码(115200)中使用的速度传输? 我测试了在另一个通过蓝牙将数据发送到同一个应用程序的arduino加载程序,这些到达得很好,区别在于它将数据发送到9600
这是我发送的Arduino代码:
#include <eHealth.h>
String CadenaUno="";
String CadenaDos="";
String CadenaTres="";
String CadenaFinal="";
// The setup routine runs once when you press reset:
void setup() {
Serial.flush();
Serial.begin(115200);
// Serial.begin(9600); //No muestra nada en android studio a esta velocidad
}
// The loop routine runs over and over again forever:
void loop() {
long currentMillis = millis();
float floatecgValue = eHealth.getECG();
int valueECG = floatecgValue*100;
CadenaUno="#ecg{";
CadenaDos="(";
CadenaTres="~";
CadenaFinal=CadenaUno+currentMillis+CadenaDos+valueECG+CadenaTres;
Serial.println(CadenaFinal);
delay(1);
}
这是我通过蓝牙验证从arduino到达的数据的部分
while (mState == STATE_CONNECTED) {
try {
StringBuilder recDataString = new StringBuilder();
String paquete = "";
String outputText="";
byte[] buffer = new byte[256];
bytes = mmInStream.read(buffer);
mDataParse.Add(buffer, bytes);
String readMessage = new String(buffer, 0, bytes);
System.out.println("ReadMessage: "+readMessage+" end string");
请指南。
答案 0 :(得分:0)
试试这个:
String prev = null;
while (mState == STATE_CONNECTED) {
try {
StringBuilder recDataString = new StringBuilder();
String paquete = "";
String outputText = "";
byte[] buffer = new byte[256];
bytes = mmInStream.read(buffer);
mDataParse.Add(buffer, bytes);
String readMessage = new String(buffer, 0, bytes);
//Split by new line symbol
String[] msgs = readMesage.split("\n");
int msgsCount = msgs.length;
//Check is we have a prev not completed message?
if (msgsCount > 0) {
if (prev != null)
msgs[0] = prev + msgs[0]; //add it to first message
//Check is last message completed?
if (readMessage.endsWith("\n"))
prev = null;
else {
prev = msgs[msgsCount - 1]; //Set last message to prev and remove it from output
msgsCount--;
}
for (int i = 0; i < msgsCount; i++) {
System.out.println("ReadMessage: " + msgs[i] + " end string");
}
}
}