核心代碼如下：
package com.example.comandroid;import static android.content.ContentValues.TAG;import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;import androidx.activity.EdgeToEdge;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;import com.jackiepenghe.serialportlibrary.MultipleSerialPortManager;
import com.jackiepenghe.serialportlibrary.OnSerialPortDataChangedListener;
import com.jackiepenghe.serialportlibrary.SerialPortManager;
import com.sscl.baselibrary.utils.ConversionUtil;
import com.sscl.baselibrary.utils.DebugUtil;
import com.sscl.baselibrary.utils.ToastUtil;import java.nio.charset.Charset;/**
* 功能描述：
* 版权所有：
* 版本：1.0
* 作者:
* 创建时间 ${DATE} ${hour}
* 邮箱 :2848444745@qq.com
*
*/public class MainActivity extends AppCompatActivity {private Button btnOpen;private Button btnClose;private Button btnSend;private TextView text;private String serialPort="/dev/ttyS1";//串口路徑
// private String serialPort="/dev/ttyS2";//串口路徑
// private String serialPort="/dev/ttyS3";//串口路徑
// private String serialPort="/dev/ttyS4";//串口路徑private int baudRate = 9600;//波特率@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);btnClose=findViewById(R.id.btn_close);btnOpen=findViewById(R.id.btn_open);btnSend=findViewById(R.id.btn_send);text=findViewById(R.id.textView);//打開串口btnOpen.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {openSerialPort();}});//關閉串口btnClose.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {MultipleSerialPortManager.closeSerialPort(serialPort);}});//發送數據btnSend.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {sendData("發送測試");}});}/*** 串口监听*/private final OnSerialPortDataChangedListener onSerialPortDataChangedListener = (data, size) -> {byte[] cache = new byte[size];System.arraycopy(data, 0, cache, 0, size);DebugUtil.warnOut(TAG, "cache = " + ConversionUtil.byteArrayToHexStr(cache));DebugUtil.warnOut(TAG, "cache = " + new String(cache));String result = ConversionUtil.byteArrayToHexStr(cache);text.setText(result);};/*** 打开串口*/private void openSerialPort() {boolean open = MultipleSerialPortManager.openSerialPort(serialPort, baudRate, onSerialPortDataChangedListener);if (open) {ToastUtil.toastLong(this, "串口打開成功");DebugUtil.warnOut(TAG, "串口打開成功");this.serialPort = serialPort;} else {DebugUtil.warnOut(TAG, "串口打開失敗");ToastUtil.toastLong(this, "串口打開失敗");}}/*** 获取串口信息*/private void getSerialPortInfo() {String[] allDevices = MultipleSerialPortManager.getAllDevices();if (allDevices.length == 0) {DebugUtil.warnOut(TAG, "allDevices length == 0");}for (int i = 0; i < allDevices.length; i++) {DebugUtil.warnOut(TAG, "allDevices[" + i + "] = " + allDevices[i]);}String[] allDevicesPath = MultipleSerialPortManager.getAllDevicesPath();if (allDevicesPath.length == 0) {DebugUtil.warnOut(TAG, "allDevicesPath length == 0");}for (int i = 0; i < allDevicesPath.length; i++) {DebugUtil.warnOut(TAG, "allDevicesPath[" + i + "] = " + allDevicesPath[i]);}}// 关闭串口private void closeSerialPort() {if (serialPort == null) {return;}MultipleSerialPortManager.closeSerialPort(serialPort);}// 發送數據private void sendData(String data) {boolean succeed= MultipleSerialPortManager.writeData(serialPort, "1234567890", Charset.forName("UTF-8"));if (!succeed){ToastUtil.toastLong(this, "發生失敗");}else{ToastUtil.toastLong(this, "發送成功");}}@Overrideprotected void onDestroy() {super.onDestroy();closeSerialPort();}
}想要完整的了解，可以看下完整的dome,這我也給出來了完整dome如下：
https://download.csdn.net/download/qq_41733851/89288862?spm=1001.2014.3001.5503
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