如何保存单选按钮的状态 [英] how to save the state of radio buttons

问题描述

我已经制作了4个单选按钮，并且想要在单击它们中的任何一个时保存状态，然后想在应用程序中使用该保存的状态.我该怎么做?

I have made 4 radio buttons and want to save the state when any of them is clicked and then want to use that saved state in the application.How can i do that?

                    myOption1.setChecked(true);
        myOption2.setChecked(true);
        myOption3.setChecked(true);
        myOption4.setChecked(true);

推荐答案

如果总共只有4个单选按钮，则最好将它们的值"存储在 SharedPreferences 中(永久存储).

If you're only going to have 4 radio buttons all in all, you might as well store their "values" in SharedPreferences (persistant storage).

示例:

SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
SharedPreferences.Editor shEditor = sharedPreferences.edit();

shEditor.putBoolean("checkbox_1", myOptionOne.isChecked());
shEditor.putBoolean("checkbox_2", myOptionTwo.isChecked());
shEditor.putBoolean("checkbox_3", myOptionThree.isChecked());
shEditor.putBoolean("checkbox_4", myOptionFour.isChecked());

shEditor.commit();

通过以下操作使用它:

SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);

 myOptionOne.setChecked(sharedPreferences.getBoolean("checkbox_1", false));
 myOptionTwo.setChecked(sharedPreferences.getBoolean("checkbox_2", false));
 myOptionThree.setChecked(sharedPreferences.getBoolean("checkbox_3", false));
 myOptionFour.setChecked(sharedPreferences.getBoolean("checkbox_4", false));

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