SharedPreference in Android

SharedPreferences in Android to allow us to store primitive data in the form of key value pair . SharedPreferences data will be lost if one of the following conditions are matched .

1. Once you uninstall the App .

2. Once you clear data from the App(Through settings).

            // declaring the pref name

public static final String PREF_NAME = "DEMO";

            // declaring the key name of SharedPreferences

public static final String PREF_USER_ID = "USER_ID";

SharedPreferences sharePref;

Editor editor;

1. Store data in SharedPreferences

public void saveUserId(Context context, String id) {

  

    sharePref = context.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE);

    editor = sharePref.edit();

    editor.putString(PREF_USER_ID, id);

    editor.commit();

}

2. Retrieve data from SharedPreferences

public String getUserId(Context context) {

        String text;

    sharePref = context.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE);

    text = sharePref.getString(PREF_USER_ID, null);

    return text;

}

3. Remove All values from SharedPreferences

public void clearPrefData(Context context) {

    sharePref = context.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE);

    editor = sharePref.edit();

    editor.clear();

    editor.commit();

}

4. Remove Specific values from SharedPreferences

public void removeUserId(Context context) {

    sharePref = context.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE);

    editor = sharePref.edit();

    editor.remove(PREF_USER_ID);

    editor.commit();

}

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