package com.evancharlton.mileage;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashMap;
import java.util.Set;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Handler;
import android.os.Message;
public class CSVExporter implements Runnable {
private Handler m_handler;
public CSVExporter(Handler handler) {
m_handler = handler;
}
public void run() {
HashMap<String, String> fillupsProjection = FillUpsProvider.getFillUpsProjection();
Set<String> keySet = fillupsProjection.keySet();
keySet.remove(FillUps._ID);
String[] proj = keySet.toArray(new String[keySet.size()]);
SQLiteDatabase db = SQLiteDatabase.openDatabase("/data/data/" + Mileage.PACKAGE + "/databases/" + FillUpsProvider.DATABASE_NAME, null, SQLiteDatabase.OPEN_READONLY);
Cursor c = db.query(FillUpsProvider.FILLUPS_TABLE_NAME, proj, null, null, null, null, FillUps._ID + " ASC");
StringBuilder sb = new StringBuilder();
c.moveToFirst();
columnsToCSV(keySet, sb);
while (c.isAfterLast() == false) {
dataToCSV(keySet, sb, c);
c.moveToNext();
}
db.close();
// write to a file
try {
File output = new File("/sdcard/mileage.csv");
FileWriter out = new FileWriter(output);
out.write(sb.toString());
out.flush();
out.close();
} catch (final IOException e) {
m_handler.post(new Runnable() {
public void run() {
Message msg = new Message();
msg.what = 0;
msg.obj = e.getMessage();
msg.arg2 = R.string.error_exporting_data;
m_handler.handleMessage(msg);
}
});
return;
}
m_handler.post(new Runnable() {
public void run() {
Message msg = new Message();
msg.what = 1;
msg.arg1 = R.string.export_finished_msg;
msg.obj = "mileage.csv";
msg.arg2 = R.string.export_finished;
m_handler.handleMessage(msg);
}
});
}
private void columnsToCSV(Set<String> columns, StringBuilder sb) {
for (String key : columns) {
sb.append("\"").append(key).append("\",");
}
sb.deleteCharAt(sb.length() - 1);
sb.append("\n");
}
private void dataToCSV(Set<String> columns, StringBuilder sb, Cursor c) {
int i = 1;
for (String key : columns) {
String val = c.getString(c.getColumnIndex(key));
if (val == null) {
val = "";
}
val = val.replaceAll("\"", "'");
sb.append("\"").append(val).append("\"");
if (i != c.getColumnCount()) {
sb.append(",");
}
i++;
}
sb.append("\n");
}
}