Question

如何在Android中保存复选框状态。条件：如果选中复选框，则必须禁用radiobuttons，反之亦然。

 //More like an enable-disable button which should save 
  radioButtons states and then disable/enable them

 //RadioButtons states should be saved too
 //if radioeg1 was checked when checkbox was checked, its state should
     be saved     

 Eg.
  // cb = (Checkbox) findViewById(...) 
 //radioeg1 = (RadioButton) findViewById(...) 
 //radioeg2 = (RadioButton) findViewById(...)


if (cb.ischecked){

     //save cb state as checked

    //radioeg1.setEnabled(false) must be saved

   //radioeg2.setEnabled(false) must be saved

   //change the RadioButtons textcolor to grey? //Optional but an added Bonus if possible 
  //if not possible using this way, maybe change a textview's color to grey?
}

Answer 1

//在创建时检查复选框的状态

boolean checkBoxState = getSharedPreferences（context）.getBoolean（＆＃34; checkbox_state＆＃34;，false）; //默认未选中

if(checkBoxState){
    checkbox.setChecked(true);
    radioeg1.setEnabled(false);
    radioeg1.setEnabled(false);
}

//更改时存储复选框状态 checkbox.setOnCheckedChangeListener（new CompoundButton.OnCheckedChangeListener（）{

    @Override
    public void onCheckedChanged (CompoundButton buttonView,boolean isChecked){
    SharedPreferences.Editor editor = getSharedPreferences(context).edit();
    editor.apply();
    editor.putBoolean("checkbox_state", isChecked);
    if (isChecked) {
        radioeg1.setEnabled(false);
        radioeg1.setEnabled(false);
    }
}
});

Answer 2

您可以执行此操作（假设this的类型为Context或子类为Context），以将复选框状态保存到SharedPreferences

SharedPreferences.Editor editor = PreferenceManager.getSharedPreferences (this).edit();

这基本上会获得一个SharedPreferences.Edit对象，可以让您编辑共享首选项。现在你可以把东西存放在里面了！

editor.putBoolean ("checkbox state", <Your boolean value here>);

现在你完成了！

嗯......虽然不太好......你仍然需要做一些我永远忘记的事情！ - apply改变了！

editor.apply();

现在你已经完成了。

要从共享首选项中获取内容，首先获取共享首选项对象:(不是Editor！）

SharedPreferences prefs = PreferenceManager.getSharedPreferences (this);

然后你只需调用getXXX方法：

boolean checkBoxState = prefs.getBoolean ("checkbox state", false);

第一个参数是键。您使用与用于保存它的密钥相同的密钥，即"checkbox state"。第二个参数是当它找不到您正在寻找的键时将返回的内容。

编辑：

糟糕！好像我忘记了方法的名称。它应该是getDefaultSharedPreferences而不是getSharedPreferences。我的坏！

您基本上检查布尔变量checkBoxState以查看是否禁用无线电按钮。

if (checkBoxState) {
    //If it is true, disable the radiobuttons
    <Your radio button name>.setEnabled (false);
}

Answer 3

SharedPreferences file;
private static int checkBox =1;
private static int radiobutton=0;
SharedPreferences.Editor editor;

In your OnCreate()
file = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
editor=file.edit();
 if(file.getInt("checkBox",0)==0)
    {


        //disable radiobutton here;


    }

    if(file.getInt("radiobutton",1)==1)
    {


        //disable checkBox here;


    }

//您可以根据自己的需要添加其他内容

Cb = (CheckBox)findViewById(R.id.CheckBox);
    Cb.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

       @Override
       public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {

            editor.putInt("checkBox", 0);


                editor.commit();
       }
   }
);  
RadioGroup radioGroup = (RadioGroup) findViewById(R.id.yourRadioGroup);        
    radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() 
    {
        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            editor.putInt("radiobutton", 1);


                editor.commit();
        }
    });

如何在您的问题中实施Shared Preferences的总体思路可能很清楚。

如何使用SharedPreferences在Android中保存状态？

3 个答案: