android - 旋转时调用DatePickerDialog onDateSet

我正在使用DialogFragment在onCreateDialog()中返回DatePickerDialog。我已经将dateSetListener设置为DialogFragment(下面的示例中为“this”)，并且一切正常，除了发生屏幕旋转时调用onDateSet()之外，这是不希望的。屏幕旋转时，如何使onDateSet不被调用？

我的DialogFragment

public static class DateDialogFragment extends DialogFragment implements
DatePickerDialog.OnDateSetListener{

    public static DateDialogFragment newInstance() {
        return new DateDialogFragment();
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        return new DatePickerDialog(getActivity(), this, 2012, 11, 19);
    }

    @Override
    public void onDateSet(DatePicker view, int year, int monthOfYear,
        int dayOfMonth) {
        //This is called when screen rotated, which I dont want
        Toast.makeText(getActivity(), "Year: "+year+" Month: "+monthOfYear+" Day: "+dayOfMonth, Toast.LENGTH_SHORT).show();
    }

}

，这就是我所说的

if(getActivity()!=null){
    FragmentManager fm = getActivity().getSupportFragmentManager();
    DialogFragment newFragment = DateDialogFragment.newInstance();
    newFragment.show(fm, "dialog");
}

最佳答案

在onDateSet方法中，使用Activity::isChangingConfigurations检查是否由于配置更改而重新启动Activity。如果是，则不显示Toast。

@Override
public void onDateSet(android.widget.DatePicker view, int year, int monthOfYear, int dayOfMonth) {
    if( ! this.getActivity().isChangingConfigurations() ) {
        // Dialog is dismissed by user explicitly, hence show the Toast message.
        Toast.makeText(getActivity(), "Year: "+year+" Month: "+monthOfYear+" Day: "+dayOfMonth, Toast.LENGTH_SHORT).show();
    }
}

我已经对其进行了测试，并且效果很好。让我知道是否需要任何进一步的帮助。