Android Open Source - android Subject

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License

The source code is released under:

GNU General Public License

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Java Source Code

package de.nico.ha_manager.helper;
/*from ww w .j a v a  2  s . co  m*/
/* 
 * Author: Nico Alt
 * See the file "LICENSE.txt" for the full license governing this code.
 */

import android.content.Context;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;

import java.util.Arrays;

import de.nico.ha_manager.R;

public class Subject {

    private static SharedPreferences prefs;

    private static void initPrefs(Context c) {
        prefs = PreferenceManager.getDefaultSharedPreferences(c);
    }

    public static String[] get(Context c) {
        initPrefs(c);

        // Set size of array to amount of Strings in SharedPreferences
        int size = prefs.getInt("subjects_size", 0);
        String[] subjects = new String[size];

        // Get parts of subject array from SharedPreferences Strings
        for (int i = 0; i < size; i++) {
            subjects[i] = prefs.getString("subjects_" + i, null);
        }
        return subjects;
    }

    public static void add(Context c, String subject) {
        initPrefs(c);
        int size = prefs.getInt("subjects_size", 0);
        String[] subjects = new String[size + 1];

        for (int i = 0; i < size; i++) {
            subjects[i] = prefs.getString("subjects_" + i, null);
        }
        subjects[size] = subject;

        SharedPreferences.Editor editor = prefs.edit();
        Arrays.sort(subjects);

        for (int i = 0; i < subjects.length; i++) {
            editor.putString("subjects_" + i, subjects[i]);
        }
        editor.putInt("subjects_size", subjects.length);
        editor.commit();

        String sAdded = c.getString(R.string.added);
        Utils.makeShortToast(c, subject + " " + sAdded);
    }

    public static void setDefault(Context c) {
        // Get subjects from strings.xml
        String[] subjects = c.getResources().getStringArray(R.array.subjects);

        // Sort subjects array alphabetically
        Arrays.sort(subjects);

        // Add subjects to SharedPreferences
        initPrefs(c);
        SharedPreferences.Editor editor = prefs.edit();
        editor.putInt("subjects_size", subjects.length);
        for (int i = 0; i < subjects.length; i++) {
            editor.putString("subjects_" + i, subjects[i]);
        }
        editor.commit();
    }

    public static void delete(Context c, int pos) {
        initPrefs(c);
        int size = prefs.getInt("subjects_size", 0);
        String[] subjects = new String[size - 1];

        for (int i = 0; i < size; i++) {
            if (i < pos)
                subjects[i] = prefs.getString("subjects_" + i, null);

            if (i > pos)
                subjects[i - 1] = prefs.getString("subjects_" + i, null);

        }

        SharedPreferences.Editor editor = prefs.edit();

        for (int i = 0; i < subjects.length; i++) {
            editor.putString("subjects_" + i, subjects[i]);

        }

        editor.putInt("subjects_size", subjects.length);
        editor.commit();

    }

}

Java Source Code List