如何从动态创建的单选按钮中选择一个单选按钮？
我有从动态创建的单选按钮中选择一个单选按钮的情况。我知道这对Radio组来说是可能的，但我仍然无法做到，因为我的情况有所不同。让我解释一下。
我有一个像＃34的问题;最近的一项调查发现，在英国的中学和＃34;有4个选项 甲
乙
下进行。
d
以json形式来自服务器的所有数据。我用一个问题动态创建了视图，使用单选按钮创建了四个选项。但我所理解的是每一行都是新行，我无法从所有单选按钮中只选择一个单选按钮。每个按钮都单独选择，但我只想选择一个单击的单选按钮。
任何帮助都将不胜感激。
您可以在下面看到我的观点：
我的代码是：
LinearLayout linearLayoutForQuestions = (LinearLayout) view.findViewById(R.id.questionsLinearLayout);
linearLayoutForQuestions.removeAllViews();
//set the questions for the user
for (int ss = 0; ss < totalNoOfQuestions.size(); ss++) {
final List<String> list = new ArrayList();
list.add("SELECT");
TextView textView = new TextView(activity);
textView.setTextSize(15);
textView.setTextColor(view.getResources().getColor(R.color.black));
textView.setTypeface(typeface1);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
params.setMargins(0, 20, 0, 0);
textView.setLayoutParams(params);
String question = totalNoOfQuestions.get(ss).getQuestions();
String questionNo = totalNoOfQuestions.get(ss).QuestionNo;
textView.setText("Question " + questionNo + " " + question);
//linearlayout and set data inside it
LinearLayout parent = new LinearLayout(activity);
parent.removeAllViews();
parent.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT));
parent.setOrientation(LinearLayout.VERTICAL);
int optionSize = totalNoOfQuestions.get(ss).getOptions().size();
for (int s = 0; s < optionSize; s++) {
//children of parent linearlayout
LinearLayout layout2 = new LinearLayout(activity);
layout2.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT));
layout2.setOrientation(LinearLayout.HORIZONTAL);
layout2.setGravity(Gravity.CENTER);
String optionNo = totalNoOfQuestions.get(ss).getOptions().get(s).getQuestionOptionNo();
TextView textView1 = new TextView(activity);
textView1.setText(optionNo);
textView.setTextSize(15);
final RadioButton radioButton = new RadioButton(activity.getApplicationContext());
radioButton.setId(s);
radioButton.setBackgroundResource(R.drawable.settings_background_ripple);
LinearLayout.LayoutParams pa = new LinearLayout.LayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT));
pa.setMargins(10,10,10,10);
radioButton.setLayoutParams(pa);
radioButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
int checkedRadioButtonId = buttonView.getId();
Toast.makeText(activity, "hit it", Toast.LENGTH_SHORT).show();
}
});
String questionOption = totalNoOfQuestions.get(ss).getOptions().get(s).getQuestionOption();
TextView textView2 = new TextView(activity);
textView2.setTextSize(15);
textView2.setText(questionOption);
layout2.addView(textView1);
layout2.addView(radioButton);
layout2.addView(textView2);
parent.addView(layout2);
}
linearLayoutForQuestions.addView(textView);
linearLayoutForQuestions.addView(parent);
}
4 个答案:
答案 0 :(得分：2)
我从一段时间以来一直在努力，最后我找到了如何做到的方式，发布我的答案，让其他人从中获取想法。我通过在内部for循环外部采用Textview和Radiogroup数组来实现它。
谢谢大家的帮助。快乐编码：）
LinearLayout linearLayoutForQuestions = (LinearLayout) view.findViewById(R.id.questionsLinearLayout);
linearLayoutForQuestions.removeAllViews();
totalNoOfQuestions = readingTests[countReadingTest].getQuestion();
//set the questions for the user
for (int ss = 0; ss < totalNoOfQuestions.size(); ss++) {
groupNo = ss;
final List<String> list = new ArrayList();
list.add("SELECT");
TextView textView = new TextView(activity);
textView.setTextSize(15);
textView.setTextColor(view.getResources().getColor(R.color.black));
textView.setTypeface(typeface1);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
params.setMargins(0, 20, 0, 0);
textView.setLayoutParams(params);
String question = totalNoOfQuestions.get(ss).getQuestions();
String questionNum = totalNoOfQuestions.get(ss).QuestionNo;
textView.setText("Question " + questionNum + " " + question);
//linearlayout and set data inside it
LinearLayout parent = new LinearLayout(activity);
parent.removeAllViews();
parent.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT));
parent.setOrientation(LinearLayout.VERTICAL);
final int optionSize = totalNoOfQuestions.get(ss).getOptions().size();
final RadioButton[] radioButton = new RadioButton[optionSize];
int size = totalNoOfQuestions.size();
final RadioGroup[] radioGroup = new RadioGroup[size]; //you can also create in xml
radioGroup[ss] = new RadioGroup(activity);
radioGroup[ss].setId(ss + 100);
radioGroup[ss].setOrientation(RadioGroup.VERTICAL)ø;
//this textview is for the optionsNo like A,B,C,D
final TextView[] textView1 = new TextView[optionSize];
LinearLayout layoutOptionsNo = new LinearLayout(activity);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.MATCH_PARENT);
layoutOptionsNo.setOrientation(LinearLayout.VERTICAL);
layoutOptionsNo.setWeightSum(optionSize);
layoutOptionsNo.setGravity(Gravity.CENTER);
layoutOptionsNo.setPadding(10, 0, 0, 0);
layoutOptionsNo.setLayoutParams(layoutParams);
LinearLayout layoutOptions = new LinearLayout(activity);
layoutOptions.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT, 1.0f));
layoutOptions.setOrientation(LinearLayout.HORIZONTAL);
layoutOptions.setWeightSum(4);
layoutOptions.setGravity(Gravity.CENTER);
//inner loop for the options for every single question
for (int s = 0; s < optionSize; s++) {
String optionNo = totalNoOfQuestions.get(ss).getOptions().get(s).getQuestionOptionNo();
textView1[s] = new TextView(activity);
textView1[s].setText(optionNo);
textView1[s].setTextSize(15);
textView1[s].setGravity(Gravity.CENTER);
LinearLayout.LayoutParams pa = new LinearLayout.LayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT));
pa.setMargins(10, 10, 10, 10);
pa.weight = 1;
textView1[s].setLayoutParams(pa);
String questionOption = totalNoOfQuestions.get(ss).getOptions().get(s).getQuestionOption();
radioButton[s] = new RadioButton(activity);
radioButton[s].setId(s);
radioButton[s].setText(questionOption);
radioButton[s].setTextSize(15);
radioButton[s].setPadding(2, 2, 2, 2);
radioButton[s].setBackgroundResource(R.drawable.settings_background_ripple);
LinearLayout.LayoutParams pa2 = new LinearLayout.LayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT, 1.0f));
pa2.setMargins(10, 10, 10, 10);
pa2.weight = 1;
radioGroup[ss].setLayoutParams(pa2);
radioGroup[ss].addView(radioButton[s]);
layoutOptionsNo.addView(textView1[s]);
}
radioGroup[ss].setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
int originalId ;
int id = group.getId();{
originalId = id-100;
}
questionNo = totalNoOfQuestions.get(originalId).getQuestionNo();
optionNo = totalNoOfQuestions.get(0).getOptions().get(checkedId).getQuestionOptionNo();
}
});
layoutOptions.addView(layoutOptionsNo);
layoutOptions.addView(radioGroup[ss]);
parent.addView(layoutOptions);
linearLayoutForQuestions.addView(textView);
linearLayoutForQuestions.addView(parent);
}
boolean showOptionHint = totalNoOfQuestions.get(0).OptionList;
LinearLayout linearLayoutForOptions = (LinearLayout) view.findViewById(R.id.optionsLinearLayout);
linearLayoutForOptions.removeAllViews();
if (showOptionHint == true) {
//dynamic creation of options under the quesiton layout
List<ReadingTest.QuestionBean.OptionsBean> questionOptions = readingTests[countReadingTest].getQuestion().get(0).getOptions();
for (int ss = 0; ss < questionOptions.size(); ss++) {
String options = questionOptions.get(ss).getQuestionOption();
String optionsNo = questionOptions.get(ss).getQuestionOptionNo();
TextView textView = new TextView(activity);
textView.setTextSize(18);
textView.setTypeface(typeface);
textView.setTextColor(view.getResources().getColor(R.color.black));
textView.setText(optionsNo + ". " + options);
linearLayoutForOptions.addView(textView);
}
}
答案 1 :(得分：1)
使用 RadioGroup ，如下所示：
LinearLayout layout = (LinearLayout) findViewById(R.id.layout); //layout defined in xml main activity layout
RadioGroup radioGroup = new RadioGroup(this); //you can also create in xml
LinearLayout.LayoutParams p = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.FILL_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT
);
layout.addView(radioGroup, p);
/*radio button 1*/
RadioButton radioButtonView1 = new RadioButton(this);
radioButtonView1.setText("RadioButton1");
radioButtonView1.setOnClickListener(this);
radioGroup.addView(radioButtonView1, p);
/*radio button 2*/
RadioButton radioButtonView2 = new RadioButton(this);
radioButtonView2.setText("RadioButton2");
radioButtonView2.setOnClickListener(mThisButtonListener);
radioGroup.addView(radioButtonView2, p);
/*radio button 3*/
RadioButton radioButtonView3 = new RadioButton(this);
radioButtonView3.setText("RadioButton3");
radioButtonView3.setOnClickListener(mThisButtonListener);
radioGroup.addView(radioButtonView3 , p);
/*radio button 4*/
RadioButton radioButtonView4 = new RadioButton(this);
radioButtonView4 .setText("RadioButton4");
radioButtonView4.setOnClickListener(mThisButtonListener);
radioGroup.addView(radioButtonView4 , p);
在这里，您只能从多个
中选择一个选项如您需要如何选择值，请使用以下代码段：
radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId)
{
radioButton = (RadioButton) findViewById(checkedId);
Toast.makeText(getBaseContext(), radioButton.getText(), Toast.LENGTH_SHORT).show(); //text related to option selected.
}
}
);
由于
答案 2 :(得分：0)
你好@Sandeep Singh Bandral
你做了很棒的工作，为什么要做这么繁重的工作 只需创建一个广播组工作并分配一个ID，然后调用 setOnCheckedChangeListener
你可以在这里看到
radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// find which radio button is selected
if(checkedId == R.id.answer1) {
Toast.makeText(getApplicationContext(), "Answer1",
Toast.LENGTH_SHORT).show();
} else if(checkedId == R.id.answer2) {
Toast.makeText(getApplicationContext(), "Answer2",
Toast.LENGTH_SHORT).show();
}else if(checkedId == R.id.answer3) {
Toast.makeText(getApplicationContext(), "Answer3",
Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getApplicationContext(), "Answer4",
Toast.LENGTH_SHORT).show();
}
}
});
代替Toast，做你的好事
测试用例：如果您不知道每个问题有多少单选按钮，则可以在此处看到以下代码
radiogroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
void onCheckedChanged(RadioGroup radioGroup, int checkedId) {
for(int i=0; i<radioGroup.getChildCount(); i++) {
RadioButton btn = (RadioButton) radioGroup.getChildAt(i);
if(btn.getId() == checkedId) {
String text = btn.getText();
// do something with text
return;
}
}
}
});
答案 3 :(得分：0)
我知道这很旧，但我遇到了同样的问题。解决办法是通过addView()将RadioButton添加到RadioGroup后改变其状态。我想这也是 BAKUS 在他的示例代码中试图表达的意思。
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