Android Open Source - original-android-cgm Dexcom G4 Service

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License

The source code is released under:

Copyright (c) 2014, John Costik All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * ...

Java Source Code

package com.ht1.cc.cgm;
//  w ww .j  ava  2 s  . c  o m
import java.io.IOException;
//import java.util.concurrent.ExecutorService;
//import java.util.concurrent.Executors;

import com.ht1.cc.USB.SerialInputOutputManager;
import com.ht1.cc.USB.USBPower;
import com.ht1.cc.USB.UsbSerialDriver;
import com.ht1.cc.USB.UsbSerialProber;
import com.ht1.cc.upload.UploadHelper;

import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.hardware.usb.UsbManager;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.wifi.WifiManager;
import android.os.AsyncTask;
import android.os.Handler;
import android.os.IBinder;
import android.os.AsyncTask.Status;
import android.util.Log;
import android.view.Gravity;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

public class DexcomG4Service extends Service {

  private final String TAG = DexcomG4Activity.class.getSimpleName();

  /**
   * The device currently in use, or {@code null}.
   */
  private UsbSerialDriver mSerialDevice;

  /**
   * The system's USB service.
   */
  public UsbManager mUsbManager;
  private UploadHelper uploader;
  private Handler mHandler = new Handler();

  private SerialInputOutputManager mSerialIoManager;
  private WifiManager wifiManager;

  @Override
  public IBinder onBind(Intent arg0) {
    // TODO Auto-generated method stub
    return null;
  }

  @Override
  public void onCreate() {
    super.onCreate();
    wifiManager = (WifiManager) this.getSystemService(Context.WIFI_SERVICE);
    mUsbManager = (UsbManager) getSystemService(Context.USB_SERVICE);
    // connectToG4();
    mHandler.removeCallbacks(readAndUpload);
    mHandler.post(readAndUpload);
  }
  @Override
  public void onDestroy() {
    super.onDestroy();

    mHandler.removeCallbacks(readAndUpload);
    USBOn();
    doReadAndUpload();
    USBOn();

    stopIoManager();

    if (mSerialDevice != null) {
      try {
        mSerialDevice.close();
      } catch (IOException e) {
        // Ignore.
      }
      mSerialDevice = null;
    }
    
  }

  //get the data upload it
  //if you don't have root, the On, Off commands won't do a thing - shouldn't break anything either
  private Runnable readAndUpload = new Runnable() {
    public void run() {

      try {
        uploader = new UploadHelper(getBaseContext());
        if (isConnected() && isOnline()) {

          USBOn();
          doReadAndUpload();
          USBOff();

          //displayMessage("Upload Complete");

        } else {
          USBOn();
          USBOff();
          displayMessage("Upload Fail");
        }

      } catch (Exception e) {
        // ignore... for now - simply prevent service and activity from
        // losing its shit.
        USBOn();
        USBOff();
        e.printStackTrace();
      }
      mHandler.postDelayed(readAndUpload, 45000);
    }
  };

  protected void doReadAndUpload() {

    try {

      mSerialDevice = null;
      mSerialDevice = UsbSerialProber.acquire(mUsbManager);

      if (mSerialDevice != null) {
        startIoManager();
        mSerialDevice.open();

        //Go get the data
        DexcomReader dexcomReader = new DexcomReader(mSerialDevice);
        dexcomReader.readFromReceiver(getBaseContext());

        uploader.execute(new String[] { dexcomReader.displayTime,
            dexcomReader.bGValue, dexcomReader.trend });
                
        Handler handler = new Handler();
        handler.postDelayed(new Runnable() {
          @Override
          //Interesting case: location with lousy wifi
          //toggle it off to use cellular
          //toggle back on for next try
          public void run() {
            Status dataUp = uploader.getStatus();
            if (dataUp == AsyncTask.Status.RUNNING) {
              uploader.cancel(true);
              
              if (wifiManager.isWifiEnabled()) {
                wifiManager.setWifiEnabled(false);
                try {
                  Thread.sleep(2500);
                } catch (InterruptedException e) {
                  e.printStackTrace();
                }
                wifiManager.setWifiEnabled(true);
                try {
                  Thread.sleep(2500);
                } catch (InterruptedException e) {
                  e.printStackTrace();
                }
              }
            }

          }
        }, 22500);

      }

    } catch (Exception e) {
      e.printStackTrace();
    }

  }

  private void USBOff() {
    if (mSerialDevice != null) {
      try {
        mSerialDevice.close();
      } catch (IOException e) {
        e.printStackTrace();
      }
      try {
        Thread.sleep(2000);
      } catch (InterruptedException e) {
        e.printStackTrace();
      }
      USBPower.PowerOff();
      Log.i(TAG, "USB OFF");
    } else {
      // displayMessage("Receiver Not Found");
      // android.os.Process.killProcess(android.os.Process.myPid());
    }

  }

  private void USBOn() {
    if (mSerialDevice != null) {
      try {
        mSerialDevice.close();
      } catch (IOException e) {
        e.printStackTrace();
      }
      USBPower.PowerOn();
      try {
        Thread.sleep(2000);
      } catch (InterruptedException e) {
        e.printStackTrace();
      }
      Log.i(TAG, "USB ON");
    } else {
      // displayMessage("Receiver Not Found");
      // android.os.Process.killProcess(android.os.Process.myPid());
    }

  }

  private boolean isConnected() {

    mSerialDevice = UsbSerialProber.acquire(mUsbManager);
    if (mSerialDevice == null) {
      //displayMessage("CGM Not Found...");
      //this.stopSelf();
      return false; // yeah, I know
    } 
    return true;

  }

  private boolean isOnline() {
    ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo netInfo = cm.getActiveNetworkInfo();
    if (netInfo != null && netInfo.isConnectedOrConnecting()) {
      return true;
    }
    return false;
  }

  private void displayMessage(String message) {
    Toast toast = Toast.makeText(getBaseContext(), message,
        Toast.LENGTH_LONG);
    toast.setGravity(Gravity.CENTER, 0, 0);
    LinearLayout toastLayout = (LinearLayout) toast.getView();
    TextView toastTV = (TextView) toastLayout.getChildAt(0);
    toastTV.setTextSize(20);
    toastTV.setGravity(Gravity.CENTER_VERTICAL | Gravity.CENTER_HORIZONTAL);
    toast.show();

  }

  private void stopIoManager() {
    if (mSerialIoManager != null) {
      Log.i(TAG, "Stopping io manager ..");
      mSerialIoManager.stop();
      mSerialIoManager = null;
    }
  }

  private void startIoManager() {
    if (mSerialDevice != null) {
      Log.i(TAG, "Starting io manager ..");
      mSerialIoManager = new SerialInputOutputManager(mSerialDevice);
      // mExecutor.submit(mSerialIoManager);
    }
  }

}

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