de.feanor.yeoldemensa.ExceptionHandler.java Source code

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Here is the source code for de.feanor.yeoldemensa.ExceptionHandler.java

Source

/**
 *   Ye Olde Mensa is an android application for displaying the current
 *   mensa plans of University Oldenburg on an android mobile phone.
 *   
 *   Copyright (C) 2009-2013 Daniel Spke
 *
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package de.feanor.yeoldemensa;

import java.net.SocketException;
import java.net.SocketTimeoutException;
import java.net.UnknownHostException;

import org.json.JSONException;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.util.Log;
import de.feanor.yeoldemensa.data.MensaFactory;

/**
 * @author dsuepke
 * 
 */
public class ExceptionHandler {

    public static void handleException(Exception e) {
        if (e instanceof JSONException) {
            displayException(e, "Fehler im Datenformat auf " + YeOldeMensa.HOST
                    + ". Das sollte nicht passieren! Wir arbeiten wahrscheinlich schon dran... Falls es bis morgen nicht wieder luft, schicke bitte eine Email an "
                    + YeOldeMensa.CONTACT_EMAIL + "!");
        } else if (e instanceof SocketTimeoutException) {
            displayException(e, "Timeout-Fehler: Die Webseite ist offline (oder ldt langsamer als in "
                    + MensaFactory.TIMEOUT + "s)!");
        } else if (e instanceof UnknownHostException) {
            displayException(e, "Fehler beim Auflsen des Hostnamens, keine Internetverbindung vorhanden?");
        } else if (e instanceof SocketException) {
            displayException(e, "Fehler beim Auflsen des Hostnamens, keine Internetverbindung vorhanden?");
        } else {
            displayException(e, "Fehler beim Auslesen der Mensadaten von " + YeOldeMensa.HOST
                    + "! Wir arbeiten wahrscheinlich schon dran... Falls es bis morgen nicht wieder luft, schicke bitte eine Email an info@yeoldemensa.de!");
        }
    }

    /**
     * Displays an exception text to the user, along with explanatory error
     * message. This error message should be understandable even to
     * non-programmers and maybe help us when they give feedback.
     * 
     * Where Exceptions might occur, always use this method! App should never
     * crash without an info to the user.
     * 
     * @param e
     *            Exception to display
     * @param errorMessage
     *            (Commonly understandable) error message to display.
     */
    public static void displayException(Exception e, String errorMessage) {
        Log.e("yom", errorMessage + ": " + e.getMessage(), e);

        AlertDialog.Builder builder = new AlertDialog.Builder(YeOldeMensa.context);
        builder.setMessage(errorMessage + "\n\nDetail: " + e).setCancelable(false).setPositiveButton("Ok",
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int id) {
                        dialog.dismiss();
                    }
                });
        builder.create().show();
    }
}