如何在Android中验证单选按钮组？（如何在android中验证单选按钮组的功能）

25-03-16 8

本篇文章给大家谈谈如何在Android中验证单选按钮组？，以及如何在android中验证单选按钮组的功能的知识点，同时本文还将给你拓展android–单选按钮多行、android–如何从动态创建的单选

本篇文章给大家谈谈如何在Android中验证单选按钮组？，以及如何在android中验证单选按钮组的功能的知识点，同时本文还将给你拓展android – 单选按钮多行、android – 如何从动态创建的单选按钮中选择一个单选按钮？、android – 如何在radiogroup中将单选按钮设置为默认值？、android – 如何用单选按钮创建一个微调器等相关知识，希望对各位有所帮助，不要忘了收藏本站喔。

本文目录一览：

如何在Android中验证单选按钮组？（如何在android中验证单选按钮组的功能）
android – 单选按钮多行
android – 如何从动态创建的单选按钮中选择一个单选按钮？
android – 如何在radiogroup中将单选按钮设置为默认值？
android – 如何用单选按钮创建一个微调器

如何在Android中验证单选按钮组？（如何在android中验证单选按钮组的功能）

我在Android游戏应用中有一个radiobuttongroup.在用户继续进行实际游戏之前,他必须选择一个级别,即三个单选按钮.现在,如果用户单击“播放”,则应用程序崩溃.如何使用验证来查看是否选择了按钮？

我也有一个edittext,我只使用了一个：if((editText.getText().toString().equals(“”)))
看看用户是否写了名字,但是这在单选按钮上不起作用,或者即使我尝试使用这种检查,至少我的游戏也崩溃了.

任何帮助表示赞赏！

解决方法:

您可以获取包含3个单选按钮的RadioGroup id.

  RadioGroup radiogrp = (RadioGroup) findViewById(R.id.RadioGroup);
  int id = radiogrp.getCheckedRadioButtonId();

这将返回该组中所选单选按钮的标识符.空选择时,返回值为-1.

因此,您可以放置条件,并检查id == -1而不是未选中任何单选按钮.

android – 单选按钮多行

我想显示相同无线电组的6个单选按钮.但是所有6个单选按钮都保持在同一条线上并离开屏幕.如何以两行显示它们(每个3个单选按钮)？
我为我尝试了一切(我是android新手).

解决方法:

从搜索周围,似乎没有办法,因为RadioGroup使用LinearLayout,它不会包装.由于单选按钮必须是直接子节点到无线电组,因此无法将子布局添加到无线电组.

这意味着您必须手动实现此布局行为.两种可能的选择是：

>创建RadioGroup的副本以扩展不同的布局,或者至少允许您动态控制它.
>实现您自己的自定义布局以替换扩展您选择的布局的RadioGroup,并实现OnClickListener.有一个很好的例子here.

android – 如何从动态创建的单选按钮中选择一个单选按钮？

我有一种情况从动态创建的单选按钮中选择一个单选按钮.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.

我有一个问题,如“最近的调查发现,在英国的中学”有4个选项,如
一个.

所有数据都以json形式来自服务器.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,将不胜感激.

你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);
        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);
            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);


    }

解决方法

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,发布我的回答,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,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);
        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);
            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);
            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);
            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);

        }


    }

android – 如何在radiogroup中将单选按钮设置为默认值？

我已经动态创建了RadioGroup和RadioButton,如下所示：

RadioGroup radioGroup = new RadioGroup(context);
                    RadioButton radioBtn1 = new RadioButton(context);
                    RadioButton radioBtn2 = new RadioButton(context);
                    RadioButton radioBtn3 = new RadioButton(context);

                    radioBtn1.setText("Less");
                    radioBtn2.setText("normal");
                    radioBtn3.setText("More");

                    radioBtn2.setChecked(true);

                    radioGroup.addView(radioBtn1);
                    radioGroup.addView(radioBtn2);
                    radioGroup.addView(radioBtn3);

这里步骤radioBtn2.setChecked(true);导致radioBtn2始终被检查.这意味着我无法通过检查其他两个单选按钮(radioBtn1,radioBtn3)取消选中radioBtn2.我想让RadioGroup一次只能检查一个单选按钮(现在它可以一次检查两个单选按钮).

我怎么解决这个问题？

解决方法:

你应该像这样检查radiogroup中的radiobutton：

radiogroup.check(IdOfYourButton)

当然,您首先必须为您的单选按钮设置ID

编辑：我忘了,radioButton.getId()也适用,拉克什

EDIT2：

android:checkedButton="@+id/my_radiobtn"

适用于radiogroup xml

android – 如何用单选按钮创建一个微调器

在main.xml中,我想要一个带有两个单选按钮的spinner1和一个带有3个复选框的spinner2.我不知道如何在Main.java中定义和创建这个微调器.
需要一些帮助.

main.xml中

<Spinner
android:id="@+id/spinner1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
<Spinner
android:id="@id/spinner2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>

spinner1 – 需要有单选按钮,spinner2需要有多个复选框

main.java

privare Spinner spiner1,spiner2;
public void OnCreate(BUndle SaveInstaceState)
{
super.OnCreate(savedInstanceState);
setContentView(R.layout.main)

spiner1=(Spinner)findViewById(R.id.spinner1);
spiner2=(Spinner)findViewById(R.id.spinner2);

//what to do from here?

}

解决方法:

在res / values /中创建strings.xml文件并添加以下内容：

<?xml version="1.0" encoding="utf-8"?>
  <resources>
<string name="spinnerstr">Choose an item</string>
<string-array name="spinner_array">
    <item>apple</item>
    <item>orange</item>
    <item>grapes</item>
</string-array>

在你的spinner.java中,添加以下内容：

Spinner spinner = (Spinner) findViewById(R.id.spinner);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromresource(
        this, R.array.spinner_array, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);

希望这会帮助你.

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