将十六进制答案转换为十二月？ [英] Converting Hex answer to Dec?
问题描述
我需要一些帮助才能将我从汽车中的OBD适配器获得的答案转换为十进制，然后将转换后的任何值添加到公式并打印出来。
私有类ConnectedThread扩展Thread {
private final InputStream mmInStream;
private final OutputStream mmOutStream;
私有BluetoothSocket mmSocket;
private ObdMultiCommand multiCommand;
public ConnectedThread（BluetoothSocket socket）{
connectionStatus = true;
mmSocket = socket;
InputStream tmpIn = null;
OutputStream tmpOut = null;
try {
tmpIn = socket.getInputStream（）;
tmpOut = socket.getOutputStream（）;
} catch（IOException e）{
Log.v（e，e）;
}
mmInStream = tmpIn;
mmOutStream = tmpOut;
}
public void run（）{
OBDcmds（）;
try {
OdbRawCommand ANS = new OdbRawCommand（22 40 90）;
while（！Thread.currentThread（）。isInterrupted（））{
Log.d（Log，ANS：+ ANS.getFormattedResult（））;
试试{
ANS.run（mmInStream，mmOutStream）;
} catch（InterruptedException e）{
e.printStackTrace（）;
}
}
} catch（例外e）{
e.printStackTrace（）;
System.out.println（之前的内部捕获）;
}
}
private void OBDcmds（）{//执行命令
try {
new TimeoutCommand（100）.run（mmInStream，mmOutStream） ;
new EchoOffCommand（）。run（mmInStream，mmOutStream）;
new LineFeedOffCommand（）。run（mmInStream，mmOutStream）;
new SelectProtocolCommand（ObdProtocols.ISO_15765_4_CAN）.run（mmInStream，mmOutStream）; // ISO_15765_4_CAN
guiHandler（Constants.TOAST，Constants.SHORT，Init Done）;
} catch（例外e）{
guiHandler（Constants.TOAST，Constants.SHORT，Init Failed）;
//处理错误
}
}
}
当被问到ANS会返回类似6240901F30的内容，其中第一个 6个数字与答案无关（ 624090 1F30）。所以我们剩下的是最后一个（在这种情况下）4个数字（1F30），它们是十六进制的，需要转换为十进制。然后将该值添加到公式 x * 0,0625 - 512 中。它需要超过这六个第一个数字，否则答案是错误的。
我的代码会怎么样？
编辑：
因为6个数字后的值会根据汽车电池的电流而变化（这就是这个命令的作用），并且因为它是在一个循环中，我有点迷失在解决方案的基础上。其他命令只有3个需要计算的最后一个数字，所以在计算答案时，只需要忽略6个第一个数字。
编辑2 ：
我添加了更多代码以希望显示更多上下文。所有这些都是非gui类。这个类处理蓝牙相关的所有东西，在我的其他类MainActivity处理gui和什么不是。希望这可能有点帮助。 OdbRawCommand ANS = new OdbRawCommand（22 40 28）; 这是来自
@Override
public String getFormattedResult（）{
int val = Integer.parseInt（getFormattedResult（）。substring（6）， 16）; //添加了这一行
return getResult（）;
}
我今天没有车来测试这个，我会得到的明天会这样做吗？
使用字符串#substring 提取最后四位数字（称为 s ），然后是
整数。 parseInt（s，16）
将其转换为整数。 16告诉解析器 s 是十六进制的。
I need some help in converting the answers I get from my OBD adapter in my car to decimal and then later adding whatever value comes out of the conversion to a formula and printed out.
private class ConnectedThread extends Thread {
private final InputStream mmInStream;
private final OutputStream mmOutStream;
private BluetoothSocket mmSocket;
private ObdMultiCommand multiCommand;
public ConnectedThread(BluetoothSocket socket) {
connectionStatus = true;
mmSocket = socket;
InputStream tmpIn = null;
OutputStream tmpOut = null;
try {
tmpIn = socket.getInputStream();
tmpOut = socket.getOutputStream();
} catch (IOException e) {
Log.v("e", "e");
}
mmInStream = tmpIn;
mmOutStream = tmpOut;
}
public void run() {
OBDcmds();
try {
OdbRawCommand ANS= new OdbRawCommand("22 40 90");
while (!Thread.currentThread().isInterrupted()) {
Log.d("Log", "ANS: " + ANS.getFormattedResult());
try {
ANS.run(mmInStream, mmOutStream);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
} catch (Exception e) {
e.printStackTrace();
System.out.println("inside catch before while");
}
}
private void OBDcmds() { // execute commands
try {
new TimeoutCommand(100).run(mmInStream, mmOutStream);
new EchoOffCommand().run(mmInStream, mmOutStream);
new LineFeedOffCommand().run(mmInStream, mmOutStream);
new SelectProtocolCommand(ObdProtocols.ISO_15765_4_CAN).run(mmInStream, mmOutStream); //ISO_15765_4_CAN
guiHandler(Constants.TOAST, Constants.SHORT, "Init Done");
} catch (Exception e) {
guiHandler(Constants.TOAST, Constants.SHORT, "Init Failed");
// handle errors
}
}
}
ANS when asked will return something like "6240901F30" where the first 6 numbers are irrelevant to the answer (6240901F30). So what we have left is the last (in this case) 4 numbers (1F30) which are in Hexadecimal and need to be converted to Decimal. This value is then later added to a formula x * 0,0625 - 512. It needs to jump over those six first numbers otherwise the answer will be wrong.
How would that look in my code?
Edit:
So because the value after the 6 numbers changes depending on the current of the battery of the car (that's what this command does), and because it's in a while-loop, i'm kind of lost on what the solution would be. Other commands only have 3 last numbers that needs to be counted for, so it's only the 6 first numbers that needs to be ignored when "calculating" the answer.
Edit 2:
I added a bit more code to hopefully show more context. All this is in a non-gui class. This class handles everything Bluetooth related and such, and in my other class "MainActivity" handles the gui and what not. Hopefully this will help a bit maybe. OdbRawCommand ANS= new OdbRawCommand("22 40 28"); This is from the pires obd-java API. And OdbRawCommand is being used to send custom commands like i'm doing right here. Here's what OdbRawCommand contains.
Edit 3:
Sorry about the many edits. but would it work if I modified the OdbRawCommand class that's in the API. Since getFormattedResult prints out the raw answer it gets from the car. Could I edit the API OdbRawCommand class (if possible) and do something like this? But by the looks of it the file is locked and can't by edited?
@Override
public String getFormattedResult() {
int val = Integer.parseInt(getFormattedResult().substring(6), 16); //added this line
return getResult();
}
I don't have my car today to test this, i'll get it tomorrow, but would this work?
Use String#substring to extract the final four digits (call that s), followed by
Integer.parseInt(s, 16)
to convert that to an integer. The 16 tells the parser that the s is hexadecimal.
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