android串口通讯源码

/* * Copyright 2009 Cedric Priscal * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package android_serialport_api; import java.io.File; import java.io.FileReader; import java.io.IOException; import java.io.LineNumberReader; import java.util.Iterator; import java.util.Vector; import android.util.Log; public class SerialPortFinder { public class Driver { public Driver(String name, String root) { mDriverName = name; mDeviceRoot = root; } private String mDriverName; private String mDeviceRoot; Vector<File> mDevices = null; public Vector<File> getDevices() { if (mDevices == null) { mDevices = new Vector<File>(); File dev = new File("/dev"); File[] files = dev.listFiles(); int i; for (i=0; i<files.length; i++) { if (files[i].getAbsolutePath().startsWith(mDeviceRoot)) { Log.d(TAG, "Found new device: " + files[i]); mDevices.add(files[i]); } } } return mDevices; } public String getName() { return mDriverName; } } private static final String TAG = "SerialPort"; private Vector<Driver> mDrivers = null; Vector<Driver> getDrivers() throws IOException { if (mDrivers == null) { mDrivers = new Vector<Driver>(); LineNumberReader r = new LineNumberReader(new FileReader("/proc/tty/drivers")); String l; while((l = r.readLine()) != null) { // Issue 3: // Since driver name may contain spaces, we do not extract driver name with split() String drivername = l.substring(0, 0x15).trim(); String[] w = l.split(" +"); if ((w.length >= 5) && (w[w.length-1].equals("serial"))) { Log.d(TAG, "Found new driver " + drivername + " on " + w[w.length-4]); mDrivers.add(new Driver(drivername, w[w.length-4])); } } r.close(); } return mDrivers; } public String[] getAllDevices() { Vector<String> devices = new Vector<String>(); // Parse each driver Iterator<Driver> itdriv; try { itdriv = getDrivers().iterator(); while(itdriv.hasNext()) { Driver driver = itdriv.next(); Iterator<File> itdev = driver.getDevices().iterator(); while(itdev.hasNext()) { String device = itdev.next().getName(); String value = String.format("%s (%s)", device, driver.getName()); devices.add(value); } } } catch (IOException e) { e.printStackTrace(); } return devices.toArray(new String[devices.size()]); } public String[] getAllDevicesPath() { Vector<String> devices = new Vector<String>(); // Parse each driver Iterator<Driver> itdriv; try { itdriv = getDrivers().iterator(); while(itdriv.hasNext()) { Driver driver = itdriv.next(); Iterator<File> itdev = driver.getDevices().iterator(); while(itdev.hasNext()) { String device = itdev.next().getAbsolutePath(); devices.add(device); } } } catch (IOException e) { e.printStackTrace(); } return devices.toArray(new String[devices.size()]); } }