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

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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;
/*from ww  w  . j av  a 2  s.  c  o m*/
import java.io.File;
import java.io.FileInputStream;
import java.io.ObjectInputStream;

import android.app.Activity;
import android.app.ActivityManager;
import android.app.ActivityManager.RunningServiceInfo;

import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.hardware.usb.UsbManager;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ScrollView;
import android.widget.TextView;

/* Main activity for the DexcomG4Activity program */
public class DexcomG4Activity extends Activity {


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

  private int maxRetries = 999;
  private int retryCount = 0;

  private TextView mTitleTextView;
  private TextView mDumpTextView;
  private ScrollView mScrollView;
  private Button b1;

  
  //All I'm really doing here is creating a simple activity to launch and maintain the service
  private Runnable updateDataView = new Runnable() {
    public void run() {

      if (!isMyServiceRunning()) {
        if (retryCount < maxRetries) {
          startService(new Intent(DexcomG4Activity.this,
              DexcomG4Service.class));
          mTitleTextView.setTextColor(Color.YELLOW);
          mTitleTextView.setText("Connecting...");
          ++retryCount;
        } else {
          mHandler.removeCallbacks(updateDataView);
          finish();
        }
      } else {
        mTitleTextView.setTextColor(Color.GREEN);
        mTitleTextView.setText("CGM Service Started");
        EGVRecord record = DexcomG4Activity.this
            .loadClassFile(new File(getBaseContext().getFilesDir(),
                "save.bin"));
        mDumpTextView.setTextColor(Color.WHITE);
        mDumpTextView.setText("\n" + record.displayTime + "\n"
            + record.bGValue + "\n" + record.trendArrow + "\n");
      }
      mHandler.postDelayed(updateDataView, 30000);
    }
  };
  private ObjectInputStream ois;

  //Look for and launch the service, display status to user
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.adb);

    mTitleTextView = (TextView) findViewById(R.id.demoTitle);
    mDumpTextView = (TextView) findViewById(R.id.demoText);
    mScrollView = (ScrollView) findViewById(R.id.demoScroller);

    LinearLayout lnr = (LinearLayout) findViewById(R.id.container);

    b1 = new Button(this);

    mHandler.post(updateDataView);

    mTitleTextView.setTextColor(Color.YELLOW);
    mTitleTextView.setText("CGM Service Pending");

    b1.setText("Stop Uploading CGM Data");
    lnr.addView(b1);

    b1.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        if (b1.getText() == "Stop Uploading CGM Data") {
          mHandler.removeCallbacks(updateDataView);
          stopService(new Intent(DexcomG4Activity.this,
              DexcomG4Service.class));
          b1.setText("Start Uploading CGM Data");
          mTitleTextView.setTextColor(Color.RED);
          mTitleTextView.setText("CGM Service Stopped");
          finish();

        } else {
          mHandler.removeCallbacks(updateDataView);
          mHandler.post(updateDataView);
          b1.setText("Stop Uploading CGM Data");
        }
      }
    });

  }

  @Override
  protected void onPause() {
    super.onPause();

  }

  @Override
  protected void onResume() {
    super.onResume();
    //Refresh the status
    EGVRecord record = this.loadClassFile(new File(this.getFilesDir(),
        "save.bin"));
    mDumpTextView.setTextColor(Color.WHITE);
    mDumpTextView.setText("\n" + record.displayTime + "\n" + record.bGValue
        + "\n" + record.trendArrow + "\n");
  }

  //Check to see if service is running
  private boolean isMyServiceRunning() {
    ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
    for (RunningServiceInfo service : manager
        .getRunningServices(Integer.MAX_VALUE)) {
      if (DexcomG4Service.class.getName().equals(
          service.service.getClassName())) {
        return true;
      }
    }
    return false;
  }

  //Deserialize the EGVRecord (most recent) value
  public EGVRecord loadClassFile(File f) {
    try {
      ois = new ObjectInputStream(
          new FileInputStream(f));
      Object o = ois.readObject();
      return (EGVRecord) o;
    } catch (Exception ex) {

      ex.printStackTrace();

    }
    return new EGVRecord();
  }
}

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