android学习笔记(5)

1. 获取SharedPreference

• [getSharedPreferences(String name, int mode)](http://developer.android.com/reference/android/content/Context.html#getSharedPreferences(java.lang.String, int)) — 通过名称，和访问mode来新建一个shared preference文件。mode值可以是：

MODE_PRIVATE
MODE_WORLD_READABLE
MODE_WORLD_WRITEABLE
MODE_MULTI_PROCESS

• getPreferences() — 创建默认的shared preference文件,app只需要一个preference文件时使用。

• 例子：

Context context = getActivity();
SharedPreferences sharedPref = context.getSharedPreferences(
        getString(R.string.preference_file_key), Context.MODE_PRIVATE);

2. 写Shared Preference

SharedPreferences sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPref.edit();
editor.putInt(getString(R.string.saved_high_score), newHighScore);
editor.commit();

3.读Shared Preference
 * ``` Java 
SharedPreferences sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
long default = getResources().getInteger(R.string.saved_high_score_default));
long highScore = sharedPref.getInt(getString(R.string.saved_high_score), default);```