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
}
}
});
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();
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
}
}
});
Then check the default radio button and your listener will fire.
rb = (RadioButton) view.findViewById(R.id.a);
rb.setChecked(true);
Good Luck
radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
if (checkedId == R.id.radioButton1) {
//do work when radioButton1 is active
} else if (checkedId == R.id.radioButton2) {
//do work when radioButton2 is active
} else if (checkedId == R.id.radioButton3) {
//do work when radioButton3 is active
}
}
});
this work for me . hope is helpfull
Try this Code.
Declare this code in your onCreate method.
RadioGroup radioGroup = (RadioGroup) findViewById(R.id.radiogroup);
radioGroup.clearCheck();
radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
RadioButton rb = (RadioButton) group.findViewById(checkedId);
if (null != rb && checkedId > -1) {
// checkedId is the RadioButton selected
switch (checkedId) {
case R.id.one:
// Do Something
break;
case R.id.two:
// Do Something
break;
case R.id.three:
// Do Something
break;
}
}
}
});
Hope this helps.
The problem is because, you are setting OnCheckedChangeListener on RadioGroup after the providerRadio.performClick(); method call.
That's why when providerRadio.performClick(); method executes till then their is no OnCheckedChangeListener available to call. So, to make it work, you need to set Listener before the call to performClick() method.
And instead of using RadioButton.performClick() you should use RadioGroup.check() method to change the current checked RadioButton.
So you can use this code to change current selection of RadioGroup
RadioGroup ItemtypeGroup = (RadioGroup) findViewById(R.id.rechargeItemtype);
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
}
}
});
ItemtypeGroup.check(R.id.a);
Note:-
Make sure to call RadioGroup.check() method after adding OnCheckedChangeListener as above in code snippet.
I guess you are performing click before setting listener to the group, that's why event is not triggered.
来源：https://stackoverflow.com/questions/18536195/android-oncheckedchanged-for-radiogroup