目录

前言

 一、环境介绍

二、设备介绍

二、方法一:

1.引入库       

2.编写代码

三、方法二:

1.引入库       

2.编写代码

四、完整代码:

五、源码:

前言

串口是一种用于Android对硬件设备通信的一种协议，可以发送某种指令控制硬件设备,也可以接受传感器发送过来的数据，比如IC/ID卡，雷达，传感器等。下面介绍串口在android开发中的2使用方式

 一、环境介绍

• Android

系统版本:Android 7.1 Android 12 
Android Studio Electric Eel | 2022.1.1

jdk-18.0.2

• PC

windows11 
串口调试工具sscom(或者其他串口调试工具也可以)

二、设备介绍

二、方法一:

使用ARMT自带的串口api   SerialPort.java

1.引入库       

在build.gradle 的dependencies中添加jar包

//ARMT SDK
implementation files('libs/armtsdkapi.jar')

2.编写代码

2.1初始化串口initSerialPort("/dev/ttyS4");

        private void initSerialPort(String path) {        try {            uart3 = new SerialPort(path, 9600, 8, "n", 1);        } catch (IOException e) {            e.printStackTrace();        }        //获取输出流        mFileOutputStream3 = (FileOutputStream) uart3.getOutputStream();        //获取输入流        mFileInputStream3 = (FileInputStream) uart3.getInputStream();    }

2编写接受数据

    private void readData() {        new Thread(() -> {            while (run_flag) {                int size3 = 0;                try {                    size3 = mFileInputStream3.read(mRevBuffer3);                } catch (IOException e) {                    e.printStackTrace();                }                if (size3 > 0) {                    String str3 = new String(mRevBuffer3, 0, size3);                    Log.i("串口", "receiveData() --> " + str3);                    mHandler.sendMessage(mHandler.obtainMessage(1, str3));                    Arrays.fill(mRevBuffer3, (byte) 0x0);                }            }        }, "串口接收线程").start();    }

这里开启线程一直读数据,读到数据后通过Handler更新到Textview

3发送数据

    private void sendData() {        try {            if (mFileOutputStream3 != null) {                mFileOutputStream3.write(mBuffer);            }        } catch (IOException e) {            e.printStackTrace();        }    }

以上就是通过ARMT提供的方法使用串口, 完整代码在最底部

三、方法二:

使用第三方库SerialPortHelper

1.引入库       

在build.gradle 的dependencies中添加jar包

    //串口    implementation 'com.GitHub.maybesix:Android-XHLibrary:v1.0.0'

添加Maven 仓库

 repositories {        maven { url 'https://jitpack.io' }           }

2.编写代码

2.1初始化串口mHelper = initSerialPortHelper("/dev/ttyS4");

这里初始化 SerialPortHelper,并且设置监听, 收到数据后通过Handler更新TextView

 private SerialPortHelper initSerialPortHelper(String port) {        SerialPortHelper serialPort = new SerialPortHelper(port, 9600);        serialPort.setSerialPortReceivedListener(new SerialPortHelper.OnSerialPortReceivedListener() {            @SuppressLint("SetTextI18n")            @Override            public void onSerialPortDataReceived(ComPortData comPortData) {                String dataStr = comPortData.getRecTime() + " 收到: " + new String(comPortData.getRecData());                mHandler.sendMessage(mHandler.obtainMessage(1, dataStr));            }        });        serialPort.open();        return serialPort;    }

2发送数据

  private void sendDataHelper() {        if (mHelper != null && mHelper.isOpen()) {            mHelper.sendTxtString("我是SerialPortHelper");        }    }

 2.3获取所有串口地址(通用方法)

List allSerial = getAllSerial();

     private List getAllSerial() {        List serialPorts = new ArrayList<>();        Pattern pattern = Pattern.compile("^ttyS|^ttyUSB|^ttyACM|^ttyAMA|^rfcomm|^tty[^/]*$");        File devDirectory = new File("/dev");        File[] files = devDirectory.listFiles();        if (files != null) {            for (File file : files) {                String name = file.getName();                if (pattern.matcher(name).find()) {                    serialPorts.add(file);                    Log.e("串口", "扫描到的串口" + file);                }            }        }        return serialPorts;    }

四、完整代码:

package com.armt.sdktest_armt.serialPort;import androidx.annotation.NonNull;import androidx.appcompat.app.AppCompatActivity;import android.annotation.SuppressLint;import android.os.Bundle;import android.os.Handler;import android.os.Looper;import android.os.Message;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.TextView;import com.armt.sdktest_armt.R;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.util.ArrayList;import java.util.Arrays;import java.util.List;import java.util.regex.Pattern;import cn.com.armt.sdk.hardware.SerialPort;import top.maybesix.xhlibrary.serialport.ComPortData;import top.maybesix.xhlibrary.serialport.SerialPortHelper;public class SerialPortActivity extends AppCompatActivity {    private byte[] mRevBuffer3 = new byte[100];    private byte[] mBuffer = "12345".getBytes();//{1,2,3,4,5};    private SerialPort uart3;    private FileOutputStream mFileOutputStream3;    private FileInputStream mFileInputStream3;    private boolean run_flag = true;    private Button send;    private TextView content;    private SerialPortHelper mHelper;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_serial_port);        send = findViewById(R.id.send);        content = findViewById(R.id.content);        //获取全部串口        List allSerial = getAllSerial();        Log.e("串口", "所有串口:" + allSerial);        //初始化串口,串口地址:"/dev/ttyS4"        initSerialPort("/dev/ttyS4");        //开启线程接收串口数据        readData();        //第二种使用串口的方式        mHelper = initSerialPortHelper("/dev/ttyS4");        //点击发送按钮        send.setOnClickListener(v -> {            //点击模拟发送数据                sendData();//            sendDataHelper();        });    }        private List getAllSerial() {        List serialPorts = new ArrayList<>();        Pattern pattern = Pattern.compile("^ttyS|^ttyUSB|^ttyACM|^ttyAMA|^rfcomm|^tty[^/]*$");        File devDirectory = new File("/dev");        File[] files = devDirectory.listFiles();        if (files != null) {            for (File file : files) {                String name = file.getName();                if (pattern.matcher(name).find()) {                    serialPorts.add(file);                    Log.e("串口", "扫描到的串口" + file);                }            }        }        return serialPorts;    }        private void initSerialPort(String path) {        try {            uart3 = new SerialPort(path, 9600, 8, "n", 1);        } catch (IOException e) {            e.printStackTrace();        }        //获取输出流        mFileOutputStream3 = (FileOutputStream) uart3.getOutputStream();        //获取输入流        mFileInputStream3 = (FileInputStream) uart3.getInputStream();    }    private Handler mHandler = new Handler(Looper.getMainLooper()) {        @Override        public void handleMessage(@NonNull Message msg) {            if (msg.what == 1) {                String data = (String) msg.obj;                content.append(data + "\n");            }        }    };        private void sendData() {        try {            if (mFileOutputStream3 != null) {                mFileOutputStream3.write(mBuffer);            }        } catch (IOException e) {            e.printStackTrace();        }    }        private void readData() {        new Thread(() -> {            while (run_flag) {                int size3 = 0;                try {                    size3 = mFileInputStream3.read(mRevBuffer3);                } catch (IOException e) {                    e.printStackTrace();                }                if (size3 > 0) {                    String str3 = new String(mRevBuffer3, 0, size3);                    Log.i("串口", "receiveData() --> " + str3);                    mHandler.sendMessage(mHandler.obtainMessage(1, str3));                    Arrays.fill(mRevBuffer3, (byte) 0x0);                }            }        }, "串口接收线程").start();    }        private SerialPortHelper initSerialPortHelper(String port) {        SerialPortHelper serialPort = new SerialPortHelper(port, 9600);        serialPort.setSerialPortReceivedListener(new SerialPortHelper.OnSerialPortReceivedListener() {            @SuppressLint("SetTextI18n")            @Override            public void onSerialPortDataReceived(ComPortData comPortData) {                String dataStr = comPortData.getRecTime() + " 收到: " + new String(comPortData.getRecData());                mHandler.sendMessage(mHandler.obtainMessage(1, dataStr));            }        });        serialPort.open();        return serialPort;    }    private void sendDataHelper() {        if (mHelper != null && mHelper.isOpen()) {            mHelper.sendTxtString("我是SerialPortHelper");        }    }    @Override    protected void onDestroy() {        super.onDestroy();        try {            run_flag = false;            if (mFileOutputStream3 != null) mFileOutputStream3.close();            if (mFileInputStream3 != null) mFileInputStream3.close();        } catch (IOException e) {            throw new RuntimeException(e);        }        if (mHelper != null) {            mHelper.close();        }    }}

 五、源码下载地址:

完整源码

来源地址：https://blog.csdn.net/qaz96801/article/details/130424895