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package org.navitproject.navit;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.os.AsyncTask;
import android.os.Environment;
import android.text.format.Time;
import android.widget.Toast;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
public class NavitBackupTask extends AsyncTask<Void, Void, String> {
private Navit mActivity;
private ProgressDialog mDialog;
public NavitBackupTask(Navit context) {
mActivity = context;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
/* Create a Wait Progress Dialog to inform the User that we are working */
mDialog = new ProgressDialog(mActivity);
mDialog.setIndeterminate(true);
mDialog.setMessage(mActivity.getString(R.string.backing_up));
mDialog.show();
}
@Override
protected String doInBackground(Void... v) {
Time now = new Time();
now.setToNow();
/* This is the Directory where all Subdirectories are stored by date */
File mainBackupDir = new File(Environment.getExternalStorageDirectory().getPath() + "/navit/backup/");
/* Create the Main Backup Directory if it doesn't exist */
if (!mainBackupDir.isDirectory()) {
if (!mainBackupDir.mkdirs())
return mActivity.getString(R.string.failed_to_create_backup_directory);
}
/* Create a Timestamp in the format YYYY-MM-DD-Index */
String timestamp = now.year + "-" + String.format("%02d", now.month+1) + "-" + String.format("%02d", now.monthDay);
/* Get the next free index */
int index = 1;
for (String s : mainBackupDir.list()) {
if (s.contains(timestamp)) {
int newIndex = Integer.parseInt(s.substring(11));
if (newIndex >= index)
index = newIndex + 1;
}
}
timestamp += "-" + index;
/* This is the Directory in which the Files are copied into */
File backupDir = new File(Environment.getExternalStorageDirectory().getPath() + "/navit/backup/" + timestamp);
/* Create the Backup Directory if it doesn't exist */
if (!backupDir.isDirectory()) {
if (!backupDir.mkdirs())
return mActivity.getString(R.string.failed_to_create_backup_directory);
}
ObjectOutputStream preferencesOOs = null;
try {
/* Backup Files in home */
mActivity.copyFileIfExists(Navit.NAVIT_DATA_DIR + "/home/bookmark.txt", backupDir.getPath() + "/bookmark.txt");
mActivity.copyFileIfExists(Navit.NAVIT_DATA_DIR + "/home/destination.txt", backupDir.getPath() + "/destination.txt");
mActivity.copyFileIfExists(Navit.NAVIT_DATA_DIR + "/home/gui_internal.txt", backupDir.getPath() + "/gui_internal.txt");
/* Backup Shared Preferences */
preferencesOOs = new ObjectOutputStream(new FileOutputStream(backupDir.getPath() + "/preferences.bak"));
preferencesOOs.writeObject(mActivity.getSharedPreferences(Navit.NAVIT_PREFS, Context.MODE_PRIVATE).getAll());
}
catch (IOException e) {
e.printStackTrace();
return mActivity.getString(R.string.backup_failed);
}
finally {
/* Close Stream to prevent Resource Leaks */
try {
if (preferencesOOs != null)
preferencesOOs.close();
}
catch (IOException e) {
e.printStackTrace();
return mActivity.getString(R.string.backup_failed);
}
}
return null;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
/* Dismiss the Wait Progress Dialog */
mDialog.dismiss();
/* If result is non null an Error occured */
if (result != null) {
Toast.makeText(mActivity, result, Toast.LENGTH_LONG).show();
return;
}
Toast.makeText(mActivity, mActivity.getString(R.string.backup_successful), Toast.LENGTH_LONG).show();
}
@Override
protected void onCancelled() {
super.onCancelled();
Toast.makeText(mActivity, mActivity.getString(R.string.backup_failed), Toast.LENGTH_LONG).show();
mDialog.dismiss();
}
}
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