只有一个选定项目的 RadioGroup-移动开发问题

RadioGroup with only one selected Item(只有一个选定项目的 RadioGroup)

本文介绍了只有一个选定项目的 RadioGroup的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在尝试制作如图所示的 RadioGroup.我希望一次只检查一个 RadioButton.

I am trying to make a RadioGroup as in the image. I want that only one RadioButton should be checked at a time.

这就是我为实现这一目标所做的.

This is what I did to achive this.

<RadioGroup
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical" >

    <RadioGroup
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <RadioButton
            android:id="@+id/radio1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/radio1" />

        <RadioButton
            android:id="@+id/radio2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/radio2" />
    </RadioGroup>

    <RadioGroup
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <RadioButton
            android:id="@+id/radio3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/radio3" />

        <RadioButton
            android:id="@+id/radio4"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/radio4" />
    </RadioGroup>
</RadioGroup>

这是图片

但是通过使用它，我可以从每一行中选择任何一个，即可以选择 2 个项目.像这样:

But by using this I can select any one from each row, i.e. 2 items can be selected. Like this:

请帮帮我...

推荐答案

更新

您可以在单击其他 RadioButton 时动态取消选择 RadioButton.为此，我不得不尝试将 View 添加到 ViewGroup，这是通过获取 TableRow<的所需 index 来确定的/代码>.


You can dynamically unselect the RadioButton when other RadioButton is clicked. To do so, I had to play with adding View to ViewGroup, which is determined by getting its desired index of the TableRow.
如上图所示，它应该以网格状布局排列，在任何给定时间只选择一个单选按钮.参考以下代码:
As shown from the above picture, it should be arranged in grid-like layout with only one radio button selected at any given time. Refer to the codes below:
.xml:
<?xml version="1.0" encoding="utf-8"?>
<com.example.test.RadioButtonWithTableLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" >

    <TableRow>

        <RadioButton
            android:id="@+id/radio1"
            android:text="Radio 1" />

        <RadioButton
            android:id="@+id/radio3"
            android:text="Radio 3" />
    </TableRow>

    <TableRow>

        <RadioButton
            android:id="@+id/radio2"
            android:text="Radio 2" />

        <RadioButton
            android:id="@+id/radio4"
            android:text="Radio 4" >
        </RadioButton>
    </TableRow>

</com.example.test.RadioButtonWithTableLayout>

.java:
public class RadioButtonWithTableLayout extends TableLayout implements
        OnClickListener {

    private RadioButton mBtnCurrentRadio;

    public RadioButtonWithTableLayout(Context context) {
        super(context);
    }

    public RadioButtonWithTableLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    public void onClick(View v) {
        final RadioButton mBtnRadio = (RadioButton) v;

        // select only one radio button at any given time
        if (mBtnCurrentRadio != null) {
            mBtnCurrentRadio.setChecked(false);
        }
        mBtnRadio.setChecked(true);
        mBtnCurrentRadio = mBtnRadio;
    }

    @Override
    public void addView(View child, int index,
            android.view.ViewGroup.LayoutParams params) {
        super.addView(child, index, params);
        setChildrenOnClickListener((TableRow) child);
    }

    @Override
    public void addView(View child, android.view.ViewGroup.LayoutParams params) {
        super.addView(child, params);
        setChildrenOnClickListener((TableRow) child);
    }

    private void setChildrenOnClickListener(TableRow tr) {
        final int c = tr.getChildCount();
        for (int i = 0; i < c; i++) {
            final View v = tr.getChildAt(i);
            if (v instanceof RadioButton) {
                v.setOnClickListener(this);
            }
        }
    }
}

来源:http://developer.android.com/reference/android/widget/RadioGroup.htmlhttp://developer.android.com/reference/android/widget/TableRow.html

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