how to uncheck the radio button in android

问题

i am developing an quiz based app. there will be 1 quest and 4 opt(radio buttons) when user opens this app radio button will be unchecked but the prob comes when the user answers 1 quest and when he goes for next quest radio button will be checked.I want to uncheck/reset the radio buttons for every quest.How can i do it?

回答1:

I assume that you are using Custom List or other thing to make your desire View ,in this c you need to save position for Each Question answer if user has given answer by selecting RadioButton then make that Save in Some Like in ArrayList just for example.For next Question which have not been given answer you can make -1 flag for that next Question.

Below is code example which i use .

                 if (childData == -1) {
            mchildHolder.mRadioPass.setChecked(false);
            mchildHolder.mRadioCorrect.setChecked(false);
            mchildHolder.mRadioFail.setChecked(false);
            mchildHolder.mRadioNa.setChecked(false);

        } else if (childData == 0) {
            mchildHolder.mRadioPass.setChecked(true);
            mchildHolder.mRadioCorrect.setChecked(false);
            mchildHolder.mRadioFail.setChecked(false);
            mchildHolder.mRadioNa.setChecked(false);
        } else if (childData == 1) {
            mchildHolder.mRadioPass.setChecked(false);
            mchildHolder.mRadioCorrect.setChecked(true);
            mchildHolder.mRadioFail.setChecked(false);
            mchildHolder.mRadioNa.setChecked(false);
        } else if (childData == 2) {
            mchildHolder.mRadioPass.setChecked(false);
            mchildHolder.mRadioCorrect.setChecked(false);
            mchildHolder.mRadioFail.setChecked(true);
            mchildHolder.mRadioNa.setChecked(false);
        } else if (childData == 3) {
            mchildHolder.mRadioOn.setChecked(false);
            mchildHolder.mRadioOff.setChecked(false);
            mchildHolder.mRadioFail.setChecked(false);
            mchildHolder.mRadioNa.setChecked(true);
        }

above code is example which can make your desire thing. Let me known if you have doubt.

来源：https://stackoverflow.com/questions/10222166/how-to-uncheck-the-radio-button-in-android