配置文件之SharedPreferences

/**
 * Created by RongGuang 
 * 应用程序配置信息
 */
public class AppOption {
    public static final String APP_OPTION_VERSION="version";
    public static final String APP_OPTION_SERVER="server";
    public static final String APP_OPTION_STATE="state";
    public static final String APP_OPTION_USER="user";
    public static final String APP_OPTION_PASSWORD="password";

    private SharedPreferences sharedPreferences;
    private SharedPreferences.Editor editor;

    public AppOption() {
        this.sharedPreferences = net.andy.com.Application.getContext().getSharedPreferences("boiling.option", Context.MODE_PRIVATE);
        this.editor = this.sharedPreferences.edit();
    }

    public String getOption(String key){
        return sharedPreferences.getString(key,"");
    }

    public void setOption(String key,String value){
        editor.putString(key, value);
        editor.apply();
    }

}

 appOption.setOption(AppOption.APP_OPTION_USER, userId.getText().toString());
                            appOption.setOption(AppOption.APP_OPTION_PASSWORD, password.getText().toString());