如何在最后输入的字母的几秒钟后显示AutoCompleteTextView的下拉列表？

AutoCompleteTextView autoCompleteTextView = findViewById(R.id.autoCompleteTextView);
autoCompleteTextView.addTextChangedListener(new TextWatcher() {
    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
    }

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
    }

    @Override
    public void afterTextChanged(Editable s) {
        // 在这里处理输入文本变化后的逻辑
    }
});

private Handler handler = new Handler();
private Runnable runnable;

@Override
public void afterTextChanged(Editable s) {
    handler.removeCallbacks(runnable); // 移除之前的延迟任务

    runnable = new Runnable() {
        @Override
        public void run() {
            // 显示下拉列表的逻辑
            autoCompleteTextView.showDropDown();
        }
    };

    handler.postDelayed(runnable, 2000); // 延迟2秒后执行任务
}