Android Open Source - GasMileage Read Mileage Data

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.ving.gasmileage;
/*from  w  w w  . ja  v  a2  s . c  o  m*/
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;

import com.ving.gasmileage.MyApplication.MileageData;

import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.AsyncTask;
import android.os.Environment;
import android.util.Log;


public class ReadMileageData extends AsyncTask<MyApplication, Integer, MyApplication> {
  private Context mContext;
  private String file = null;
  private File dir = null;
  private File myFile = null;
  private ProgressDialog pd = null;
  private String parsingErrors = "";
  private String errorMsg = null;

  ReadMileageData(Context context, String fileName) {
    Log.i("ReadMileageData","Starting");
    mContext = context;
      file = fileName;
      dir = new File(Environment.getExternalStorageDirectory().toString(),"/GasMileage");
      myFile = new File(dir, file);
  }

  protected void onPreExecute() {
      pd = ProgressDialog.show(mContext, "Reading", "Reading Data from "+file);
  }

  protected MyApplication doInBackground(MyApplication... myApps) {
    Log.i("ReadMileageData","In doInBackground "+myFile.toString());
    myApps[0].clearRowData();
    try {
      FileInputStream iStream =  new FileInputStream(myFile);
      InputStreamReader iStreamReader = new InputStreamReader(iStream);
      BufferedReader myReader = new BufferedReader(iStreamReader);
      String row = "";
      while ((row = myReader.readLine()) != null) {
        myApps[0].saveRow(row);
      }
      myReader.close();
    }catch(Exception e) {
      Log.e("ReadMileageData","Error Processing file "+e.toString());
      errorMsg = e.toString();
      cancel(true);
    }
    if (! isCancelled()) {
      Log.i("ReadMileageData","Abount to set up YearList");
    }
    return myApps[0];
  }

  protected void onProgressUpdate(Integer... progress) {

    }
  
  protected void onCancelled(MyApplication myApp) {
    pd.cancel();
    myApp.setFileState(false);
    myApp.clearRowData();
    AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
      builder.setTitle("No Data Retrieved");
      builder.setMessage("Sorry, there was an error trying to read the file.\n" + errorMsg);
      builder.setPositiveButton("ok", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int arg1) {
                dialog.dismiss();
            }});
      builder.setCancelable(false);
      AlertDialog myAlertDialog = builder.create();
      myAlertDialog.show();
  }
  
  protected void onPostExecute(MyApplication myApp) {
    MileageData md;
    Log.i("ReadMileageData","Finishing");
    
    for (String row : myApp.getRowData().split("\n")) {
      if (! row.equals("")) {
        String[] rowData = row.split(",");
        try {
          md = myApp.addData(rowData);
        } catch (Exception e) {
  //        Log.e("ReadMileageData","Error: "+e.toString());
          parsingErrors += "\n" + row + "\n" + e.toString() + "\n";
        }
      }
    }
    myApp.clearRowData();
    myApp.notifyDataSetChanged(true);
    myApp.setFileState(true);
    pd.cancel();
    if (! parsingErrors.equals("")) {
      AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
        builder.setTitle("Error Parsing Data");
        builder.setMessage("Sorry, there were error(s) parsing some of the data in the file.\n" + parsingErrors);
        builder.setPositiveButton("ok", new DialogInterface.OnClickListener() {
              public void onClick(DialogInterface dialog, int arg1) {
                  dialog.dismiss();
              }});
        builder.setCancelable(false);
        AlertDialog myAlertDialog = builder.create();
        myAlertDialog.show();
    }
  }
}

Java Source Code List

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