问题描述
我正在android中编写 Activity ，其中在RadioGroup下有两个单选按钮.默认情况下会选中其中之一.但是我无法在 onCreate 方法中触发该事件，因此我无法在其中执行某些操作.点击 onCheckedChanged 时运行正常.
I'm writing an Activity in android where I have two radio buttons under a RadioGroup. One of them is checked by default. But I can't trigger the event in onCreate method so that I can do something in that. The onCheckedChanged is running fine when clicked on.
RadioGroup ItemtypeGroup = (RadioGroup) findViewById(R.id.rechargeItemtype);
RadioButton providerRadio = (RadioButton) findViewById(R.id.a);
providerRadio.performClick();
ItemtypeGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged (RadioGroup group,int checkedId){
Log.d("chk", "id" + checkedId);
if (checkedId == R.id.a) {
//some code
} else if (checkedId == R.id.b) {
//some code
}
}
});
推荐答案
在初始化时触发默认复选框.使用clearCheck方法将所有内容设置为未选中，然后设置处理程序，然后设置默认值，您的处理程序将触发.
To fire a radio check box for the default when initializing. Set everything to unchecked with the clearCheck method, then set the handler, then set the default and your handler will fire.
itemtypeGroup.clearCheck();
然后像往常一样添加一个侦听器...
then same as usual add a listener...
itemtypeGroup
.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
Log.d("chk", "id" + checkedId);
if (checkedId == R.id.a) {
//some code
} else if (checkedId == R.id.b) {
//some code
}
}
});
然后选中默认的单选按钮，您的听众将被触发.
Then check the default radio button and your listener will fire.
rb = (RadioButton) view.findViewById(R.id.a);
rb.setChecked(true);
祝你好运
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