SharedPreferencesUtil

封装了SharedPreferences ，方便调用。

public class SharedPreferencesUtil {
    public static String getString(Context context, String key,
                                             final String defaultValue) {
        final SharedPreferences settings = PreferenceManager
                .getDefaultSharedPreferences(context);
        return settings.getString(key, defaultValue);
    }

    public static void setString(Context context, final String key,
                                           final String value) {
        final SharedPreferences settings = PreferenceManager
                .getDefaultSharedPreferences(context);
        settings.edit().putString(key, value).apply();
    }

    public static boolean getBoolean(Context context, final String key,
                                               final boolean defaultValue) {
        final SharedPreferences settings = PreferenceManager
                .getDefaultSharedPreferences(context);
        return settings.getBoolean(key, defaultValue);
    }

    public static boolean hasKey(Context context, final String key) {
        return PreferenceManager.getDefaultSharedPreferences(context).contains(
                key);
    }

    public static void setBoolean(Context context, final String key,
                                            final boolean value) {
        final SharedPreferences settings = PreferenceManager
                .getDefaultSharedPreferences(context);
        settings.edit().putBoolean(key, value).apply();
    }

    public static void setInt(Context context, final String key,
                                        final int value) {
        final SharedPreferences settings = PreferenceManager
                .getDefaultSharedPreferences(context);
        settings.edit().putInt(key, value).apply();
    }

    public static int getInt(Context context, final String key,
                                       final int defaultValue) {
        final SharedPreferences settings = PreferenceManager
                .getDefaultSharedPreferences(context);
        return settings.getInt(key, defaultValue);
    }

    public static void setFloat(Context context, final String key,
                                          final float value) {
        final SharedPreferences settings = PreferenceManager
                .getDefaultSharedPreferences(context);
        settings.edit().putFloat(key, value).apply();
    }

    public static float getFloat(Context context, final String key,
                                           final float defaultValue) {
        final SharedPreferences settings = PreferenceManager
                .getDefaultSharedPreferences(context);
        return settings.getFloat(key, defaultValue);
    }

    public static void setLong(Context context, final String key,
                                         final long value) {
        final SharedPreferences settings = PreferenceManager
                .getDefaultSharedPreferences(context);
        settings.edit().putLong(key, value).apply();
    }

    public static long getLong(Context context, final String key,
                                         final long defaultValue) {
        final SharedPreferences settings = PreferenceManager
                .getDefaultSharedPreferences(context);
        return settings.getLong(key, defaultValue);
    }

    public static void clear(Context context,
                                       final SharedPreferences p) {
        final SharedPreferences.Editor editor = p.edit();
        editor.clear();
        editor.apply();
    }
}



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