getCheckedRadioButtonId() 返回无用的 int? [英] getCheckedRadioButtonId() returning useless int?

问题描述

我有一个按钮的 onClickListener 需要检测用户单击按钮时选择了哪个单选按钮.目前，您在 onClickListener 中看到的 Log.v 没有返回无用的信息:

I have a button's onClickListener that needs to detect which radiobutton was selected when the user clicks the button. Currently, the Log.v you see below in the onClickListener is not returning a useless bit of info:

这是点击提交三次，每次选择不同的电台:

This is clicking submit three times with a different radio selected each time:

04-27 19:24:42.417: V/提交(1564): 1094168584

04-27 19:24:42.417: V/submit(1564): 1094168584

04-27 19:24:45.048: V/提交(1564): 1094167752

04-27 19:24:45.048: V/submit(1564): 1094167752

04-27 19:24:47.348: V/提交(1564): 1094211304

04-27 19:24:47.348: V/submit(1564): 1094211304

所以，我需要知道实际选择了哪个单选按钮 - 有没有办法获取单选按钮的对象?我希望能够从 XML 中获取它的 id#，以及它的当前文本.

So, I need to know which radioButton is actually selected - is there a way to get the object of the radiobutton? I want to be able to get it's id# from XML, as well as its current text.

以下是相关代码:

public void buildQuestions(JSONObject question) throws JSONException {

    radioGroup = (RadioGroup) questionBox.findViewById(R.id.responseRadioGroup);

    Button chartsButton = (Button) questionBox.findViewById(R.id.chartsButton);
    chartsButton.setTag(question);
    Button submitButton = (Button) questionBox.findViewById(R.id.submitButton);

    chartsButton.setOnClickListener(chartsListener);
    submitButton.setOnClickListener(submitListener);

    TagObj tagObj = new TagObj(question, radioGroup);
    submitButton.setTag(tagObj);

}

public OnClickListener submitListener = new OnClickListener() {
    public void onClick(View v) {
        userFunctions = new UserFunctions();
        if (userFunctions.isUserLoggedIn(activity)) {
            TagObj tagObject = (TagObj) v.getTag();
            RadioGroup radioGroup = tagObject.getRadioGroup();
            JSONObject question = tagObject.getQuestion();

            Log.v("submit", Integer.toString(radioGroup.getCheckedRadioButtonId()));
            SubmitTask submitTask = new SubmitTask((Polling) activity, question);
            submitTask.execute();

        }
    }   
};

推荐答案

getCheckedRadioButtonId() 返回RadioButton的id(或-1 如果没有检查 RadioButtons)在 Radiogroup 中检查.如果您在布局中为 RadioButons 设置不同的 id，那么您将尝试将这些 id 与方法的返回相匹配，以查看哪个被选中:

getCheckedRadioButtonId() returns the id of the RadioButton(or -1 if no RadioButtons are checked) that is checked in the Radiogroup. If you set distinct ids to the RadioButons in the layout then you will try to match those ids with the return of the method to see which one is checked:

//field in the class
private static final int RB1_ID = 1000;//first radio button id
private static final int RB2_ID = 1001;//second radio button id
private static final int RB3_ID = 1002;//third radio button id

//create the RadioButton
RadioButton rb1 = new RadioButton(this);
//set an id
rb1.setId(RB1_ID);


    int btn = radioGroup.getCheckedRadioButtonId();
    switch (btn) {
    case RB1_ID:
        // the first RadioButton is checked.
    break;
        //other checks for the other RadioButtons ids from the RadioGroup
    case -1:
        // no RadioButton is checked inthe Radiogroup
    break;
    }

这篇关于getCheckedRadioButtonId() 返回无用的 int?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！