1.SharedPreferences类将数据保存在一个xml文件中,文件存放在/data/data/<package name>/shared_prefs目录下
// //创建异或获取一个已经存在的sharedPreferences对象 SharedPreferences sharedPreferences = getSharedPreferences("mySP", Context.MODE_PRIVATE);
2. 新增或编辑值
Editor editor = sharedPreferences.edit(); editor.putString("username", "ccc"); editor.putString("password", "ddd"); editor.commit();
3. 读取值,第二个参数为默认值,如果取不到,则返回这个默认值
String username = sharedPreferences.getString("username", ""); String password = sharedPreferences.getString("password", "");
4. 删除值
Editor editor = sharedPreferences.edit(); editor.remove("password"); editor.commit();