Android Open Source - GasMileage Write Mileage Data

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Back to project page GasMileage.

License

The source code is released under:

GNU General Public License

Java Source Code

package com.ving.gasmileage;
//ww  w  . ja  va2s.com
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
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 WriteMileageData extends AsyncTask<MyApplication, Integer, MyApplication> {
  Context mContext;
  private String file = null;
  private File dir = null;
  private File myFile = null;
  ProgressDialog pd = null;
  public String errorMsg = null;

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

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

  protected MyApplication doInBackground(MyApplication... myApps) {
    MileageData md;
    Log.i("WriteMileageData","In doInBackground "+myFile.toString());
    try {
      dir.mkdirs();
      FileOutputStream iStream =  new FileOutputStream(myFile);
      OutputStreamWriter iStreamWriter = new OutputStreamWriter(iStream);
      BufferedWriter myWriter = new BufferedWriter(iStreamWriter);
      myWriter.write(myApps[0].toCSV());
      myWriter.close();
    }catch(Exception e) {
      Log.e("WriteMileageData","Error Processing file "+e.toString());
      errorMsg = e.toString();
      cancel(true);
    }
    return myApps[0];
  }

  protected void onProgressUpdate(Integer... progress) {

    }
  
  protected void onCancelled(MyApplication myApp) {
    pd.cancel();
    myApp.setFileState(false);
    AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
      builder.setTitle("No Data Written");
      builder.setMessage("Sorry, there was an error trying to write 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) {
    Log.i("WriteMileageData","Finishing");
    myApp.setFileState(true);
    myApp.setChanged(false);
    pd.cancel();
  }
}

Java Source Code List

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