如何退出后保存复选框的状态？ [英] How to save state of CheckBox after exit?

问题描述

在我的应用程序，一个接口有一定的复选框，我希望在我退出界面，复选框应保持state.So下一次我进入它可以显示我所做的最后再寄一次使用了共享preferrences 来实现这一目标。

In my app ,one interface has some checkBoxes,I wish after I exit the interface, the CheckBoxes should maintain the state.So next time I enter it can show what I have done last time.I have used SharedPreferrences to achieve 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();
    }

});

但它不工作。当我回到这个页面，所有复选框显示状态每一个项目处于未选中状态。

But it doesn't work. when I return to this page, All checkBox show state that "every item is unselected ".

我如何能实现我想功能？

How can I realize the function I wish?

推荐答案

在认沽日期getShared preferences，你必须与此数据的onCreate初始化你checkboz状态，如下图所示。

After put date getSharedPreferences, You have to initialize your checkboz state with this data in onCreate, like below

//的onCreate

// onCreate

SharedPreferences settings = getSharedPreferences("syllabus", 0);
Boolean isChecked = settings.getBoolean("cbx1_ischecked", false);
checkbox1.setChecked(isChecked );

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