无法保存CheckBox的Andr​​oid中的状态 [英] Can not save the state of CheckBox in Android

问题描述

我开发的应用程序。有在一个页面许多复选框。我想保存复选框的状态，当我退出页面。我使用共享preferrences保存。在code是这样的：

I am developing an application. There are many checkbox in one page. I want to save the state of CheckBox when I exit page. I use SharedPreferrences to save. The code is like this:

checkbox1.setOnCheckedChangeListener(new OnCheckedChangeListener(){
    public void onCheckedChanged(CompoundButton arg0, boolean isChecked) {
// TODO Auto-generated method stub
Editor editor = getSharedPreferences("syllabus", 0).edit();
editor.putBoolean("cbx1_ischecked", isChecked);
editor.commit();
}
    });
checkbox2.setOnCheckedChangeListener(new OnCheckedChangeListener(){
    public void onCheckedChanged(CompoundButton arg0, boolean isChecked) {
    // TODO Auto-generated method stub
    Editor editor = getSharedPreferences("syllabus", 0).edit();
    editor.putBoolean("cbx2_ischecked", isChecked);
    editor.commit();
    }

});

当我离开这个页面，然后再返回。所有复选框状态变得不选择作为默认值。为什么？

When I leave this page, and back again. All the checkbox state becomes not selected as default. why?

推荐答案

您正在保存vallues但你必须恢复他们，你的活动开始是这样的：

You are saving vallues but you have to restore them you your activity is started like this :

SharedPreferences prefs = getSharedPreferences("syllabus", 0);
checkbox1.setChecked(prefs.getBoolean("cbx1_ischecked" ,false));
checkbox2.setChecked(prefs.getBoolean("cbx2_ischecked" ,false));

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