问题

chip_group_filter.removeAllViews();
for (FilterModel filterModel : Common.categorySelected.getFilters()) {
    Chip chip = (Chip) getLayoutInflater().inflate(R.layout.layout_filter_item, null);
    chip.setText(new StringBuilder(filterModel.getName()));
    chip.setCheckedIconVisible(false);
    chip_group_filter.addView(chip);
    chip.setChipBackgroundColorResource(R.color.lightGray);
    chip.setTextColor(getResources().getColor(android.R.color.black));
    chip.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            if (isChecked) {
                seeSelectedChip(chip);
                serviceListViewModel.loadServicesByFilter(chip.getText().toString());
            }
        }
    });
}

我想将第一个芯片选为默认芯片，并希望执行相应的 checkChangedListener 事件。如何编写这个逻辑？

<details>
<summary>英文:</summary>

I have defined my chipgroup in my XML and adding chips programtically as below:

  

    chip_group_filter.removeAllViews();
            for(FilterModel filterModel : Common.categorySelected.getFilters()){
                Chip chip = (Chip) getLayoutInflater().inflate(R.layout.layout_filter_item, null);
                chip.setText(new StringBuilder(filterModel.getName()));
                chip.setCheckedIconVisible(false);
                chip_group_filter.addView(chip);
                chip.setChipBackgroundColorResource(R.color.lightGray);
                chip.setTextColor(getResources().getColor(android.R.color.black));
                chip.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
                    @Override
                    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                        if (isChecked) {
                            seeSelectedChip(chip);
                            serviceListViewModel.loadServicesByFilter(chip.getText().toString());
                        }
                    }
                });

I want to select first chip as default chip and want to execute checkChangedListener event for the same. How to write that logic?



</details>


# 答案1
**得分**: 2

你可以使用方法：[`chipGroup.check(id)`][1]。它使用芯片的`id`进行选择。

你可以使用：

    chipGroup.check(chip.getId());

或者如果你没有id：

    chipGroup.check(chipGroup.getChildAt(0).getId());

  [1]: https://developer.android.com/reference/com/google/android/material/chip/ChipGroup#check

<details>
<summary>英文:</summary>

You can use the the method: [`chipGroup.check(id)`][1]. It works with the `id` of the chip to select.

You can use: 

    chipGroup.check(chip.getId());

or if you don&#39;t have the id

    chipGroup.check(chipGroup.getChildAt(0).getId());


  [1]: https://developer.android.com/reference/com/google/android/material/chip/ChipGroup#check

</details>



# 答案2
**得分**: 0

你可以简单地使用：

```kotlin
val firstChipId = chipGroup.getChildAt(0)?.id ?: View.NO_ID      
chipGroup.check(firstChipId)

 val firstChipId = chipGroup.getChildAt(0)?.id ?: View.NO_ID      
    chipGroup.check(firstChipId)