Android - Storing/retrieving strings with shared preferences

Question

As the title says, I want to save and retrieve certain strings. But my code won't pass through the first line neither in retrieve or store. I tried to follow this link: http://developer.android.com/guide/topics/data/data-storage.html

private void savepath(String pathtilsave, int i) {     String tal = null;     // doesn't go past the line below     SharedPreferences.Editor editor = getPreferences(MODE_PRIVATE).edit();     tal = String.valueOf(i);     editor.putString(tal, pathtilsave);     editor.commit(); } 

and my retrieve method:

public void getpaths() {     String tal = null;     // doesn't go past the line below     SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);     for (int i = 1; i <= lydliste.length - 1; i++) {         tal = String.valueOf(i);         String restoredText = settings.getString(tal, null);         if (restoredText != null) {             lydliste[i] = restoredText;         }     } } 

lydliste is a static string array. PREFS_NAME is

public static final String PREFS_NAME = "MyPrefsFile"; 

Answer 1

To save to preferences:

PreferenceManager.getDefaultSharedPreferences(context).edit().putString("MYLABEL", "myStringToSave").apply();   

To get a stored preference:

PreferenceManager.getDefaultSharedPreferences(context).getString("MYLABEL", "defaultStringIfNothingFound");  

Where context is your Context.

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If you are getting multiple values, it may be more efficient to reuse the same instance.

 SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);  String myStrValue = prefs.getString("MYSTRLABEL", "defaultStringIfNothingFound");  Boolean myBoolValue = prefs.getBoolean("MYBOOLLABEL", false);  int myIntValue = prefs.getInt("MYINTLABEL", 1); 

And if you are saving multiple values:

Editor prefEditor = PreferenceManager.getDefaultSharedPreferences(context).edit(); prefEditor.putString("MYSTRLABEL", "myStringToSave"); prefEditor.putBoolean("MYBOOLLABEL", true); prefEditor.putInt("MYINTLABEL", 99); prefEditor.apply();   

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Note: Saving with apply() is better than using commit(). The only time you need commit() is if you require the return value, which is very rare.

Answer 2

private static final String PREFS_NAME = "preferenceName";  public static boolean setPreference(Context context, String key, String value) {     SharedPreferences settings = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);     SharedPreferences.Editor editor = settings.edit();     editor.putString(key, value);     return editor.commit(); }  public static String getPreference(Context context, String key) {     SharedPreferences settings = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);     return settings.getString(key, "defaultValue"); }