Android Open Source - SerialPort_Android Serial Port Demo

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License

The source code is released under:

GNU General Public License

Java Source Code

/*This file is part of SerialPort_Android.
 * //w  w w . j  a v  a 2 s .  c  om
 * SerialPort_Android is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * any later version.
 *
 * CustomPages is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
 *  
 * Copyright (c) Me-Garino Jrmy 
*/
package com.thebigbang.demo;

import java.io.IOException;
import java.util.TooManyListenersException;

import com.thebigbang.SerialPort;
import com.thebigbang.SerialPortConfig;
import com.thebigbang.SerialPortEvent;
import com.thebigbang.SerialPortEventListener;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Toast;

public class SerialPortDemo extends Activity {
  private SerialPort serial;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    //set configuration for the new serial port to open:
    SerialPortConfig config = new SerialPortConfig();
    config.baudRate = 19200;
    //initialize the new serial port. Give a try to AutomaticInit in case you have no idea of the chip used for the adapter.
    //but I would still advice to prefer the manufacturers specific one's (prolific and ftdevices)
    serial = SerialPort.AutomaticInit(this, config, null, null);
    if(serial==null)
    {
      //if no known devices are found we then return or manage our application in another way:
      Toast.makeText(this, "No Serial Port Found", Toast.LENGTH_LONG).show();
      return;
    }
    //tell the serial port to notify the main class of new data available 
    //(read purposes and special communication process)
    serial.notifyOnDataAvailable(true);
    try {
      serial.addEventListener(new SerialPortEventListener() {
        @Override
        public void serialEvent(SerialPortEvent ev) {
          //If we are here then it means some new data arrived: we can read it all or not.
          //it works like any Streams (ReadOnly)
          try {
            int bufSize;
            bufSize = serial.getInputStream().read();
            byte[] buffer = new byte[bufSize];
            serial.getInputStream().read(buffer, 0, bufSize);
            //you can now push to the design your answer, trigger a button, or directly writing data on the screen (not showed in that demo).
            Toast.makeText(SerialPortDemo.this, new String(buffer), Toast.LENGTH_LONG).show();
          } catch (IOException e) {
            e.printStackTrace();
          }
          //When reading is done internal serialPort buffer is empty. Then serial.getInputStream().read() will return -1;
        }
      });
    } catch (TooManyListenersException e) {
      e.printStackTrace();
      //for now only one listener instance is authorized, any more will throw that exception.
    }
    //now to write some data to the serial port you have to use:
    try {
      //here you can send data like for any Stream (Writing only, Output). Working with a buffer, size and all.
      serial.getOutputStream().write("This is the data to send over serial port [ACK] and equivalent are totally accepted".getBytes());
    } catch (IOException e) {
      e.printStackTrace();
      //an IO error can occur, please keep in mind to check for exception as device may not have received the data.
    }
  }
}

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