专门访问和设置SharePreference的工具类, 保存和配置一些设置信息

public class PrefUtils {

private static final String SHARE_PREFS_NAME = "itcast";

public static void putBoolean(Context ctx, String key, boolean value) {
SharedPreferences pref = ctx.getSharedPreferences(SHARE_PREFS_NAME,
Context.MODE_PRIVATE);

pref.edit().putBoolean(key, value).commit();
}

public static boolean getBoolean(Context ctx, String key,
boolean defaultValue) {
SharedPreferences pref = ctx.getSharedPreferences(SHARE_PREFS_NAME,
Context.MODE_PRIVATE);

return pref.getBoolean(key, defaultValue);
}

public static void putString(Context ctx, String key, String value) {
SharedPreferences pref = ctx.getSharedPreferences(SHARE_PREFS_NAME,
Context.MODE_PRIVATE);

pref.edit().putString(key, value).commit();
}

public static String getString(Context ctx, String key, String defaultValue) {
SharedPreferences pref = ctx.getSharedPreferences(SHARE_PREFS_NAME,
Context.MODE_PRIVATE);

return pref.getString(key, defaultValue);
}

public static void putInt(Context ctx, String key, int value) {
SharedPreferences pref = ctx.getSharedPreferences(SHARE_PREFS_NAME,
Context.MODE_PRIVATE);

pref.edit().putInt(key, value).commit();
}

public static int getInt(Context ctx, String key, int defaultValue) {
SharedPreferences pref = ctx.getSharedPreferences(SHARE_PREFS_NAME,
Context.MODE_PRIVATE);

return pref.getInt(key, defaultValue);
}

}