如何单选按钮添加到无线电集团 [英] How to add radio buttons to radio group

问题描述

我有一个TableLayout，并在每行的第三列我要放置一个单选按钮组。
我打造的单选按钮是这样的：

I have a TableLayout and in the third column of every row I want to place a radio group. I build the RadioButtons like this:

rg = (RadioGroup) findViewById(R.id.radioGroup1);

for (int k = 0; k < size; k++) {
    rb[k] = new RadioButton(context);
    rg.addView(rb[k]);
}

然而，这引起我的应用程序崩溃，任何想法？

However this cause my app to crash, any ideas?

推荐答案

您正在与 megethos 的长度基本数组，但你的循环使用长度尺寸。如果 megethos 和尺寸是不同的值，这可能会导致许多不同类型的错误......但所有这些多余的，因为一个RadioGroup中保持这个数组是最新的你。

You are building a primitive array with the length of megethos, but your loop uses the length size. If megethos and size are different values this can cause many different types of errors... But all of this redundant since a RadioGroup keeps this array up to date for you.

我会尝试这样的事：

RadioGroup group = (RadioGroup) findViewById(R.id.radioGroup1);
RadioButton button;
for(int i = 0; i < 3; i++) {
    button = new RadioButton(this);
    button.setText("Button " + i);
    group.addView(button);
}

当你想在索引引用一个按钮：

group.getChildAt(index);

另外，请随时发表您的logcat的错误，它告诉我们的究竟的什么地方出了错，并去哪里找。否则，我们不得不猜是这样的。

Also please always post your logcat errors, it tells us exactly what went wrong and where to look. Otherwise we have to guess like this.

更新

这个错误是因为你试图在同一按钮添加到两个不同的布局：

The error is because you are trying to add the same button to two different layouts:

tr[k].addView(rb[k]);
rg.addView(rb[k]);

视图只能有一个父。据我知道你不能先破RadioGroup中分割成多个视图没有大量的定制。然而一个ListView已经有一个行为像一个RadioGroup中内置的功能setChoiceMode（）：

a view can only have one parent. As far as I know you cannot break a RadioGroup apart into multiple views without a lot of customization first. However a ListView already has the built-in feature setChoiceMode() that behaves like a RadioGroup:

List<String> list = new ArrayList<String>();
list.add("one");
list.add("two");
list.add("three");

ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_checked, list);
ListView listView = (ListView) findViewById(R.id.list);
listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
listView.setAdapter(adapter);

您可以轻松地适应 simple_list_item_checked 显示SSID和信号强度。希望有所帮助。 （如果你等待足够长的伊姆兰·罕可能剪切和放大器;粘贴我的答案与图形变化，然后声称它作为自己的一次。）

You can easily adapt simple_list_item_checked to display the SSID and signal strength. Hope that helps. (If you wait long enough imran khan might cut & paste my answer with graphical change, then claim it as his own again.)

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