Android中点击控件移除String数组首个元素失效，求解决方案

你遇到的问题有两个核心原因：

1. Skip(1).ToArray()是C# LINQ的语法，Android Java环境根本不支持这行代码，它连编译都通不过
2. 就算能生成新数组，你没有通知适配器数据源发生变化，AutoCompleteTextView的UI不会自动更新

解决方案（推荐用ArrayList实现） #

把固定长度的数组换成ArrayList，它支持动态修改元素，再配合适配器的notifyDataSetChanged()方法就能实现需求：

AutoCompleteTextView aat_reason_not_presented;
aat_reason_not_presented = findViewById(R.id.aat_reason_not_presented);

// 用ArrayList替代数组，方便动态增删元素
ArrayList<String> reasonsList = new ArrayList<>(Arrays.asList(
    "Unclaimed", "Lost/Stolen", "Damaged/Defective", "Pawned", "Not Turned Over", "Others"
));
ArrayAdapter<String> adapterYesNo = new ArrayAdapter<>(
    getApplicationContext(), 
    android.R.layout.simple_spinner_item, 
    reasonsList
);

adapterYesNo.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
aat_reason_not_presented.setAdapter(adapterYesNo);

aat_distribution_status.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View arg1, int pos, long id) {
        // 避免空列表报错，先判断列表不为空
        if (!reasonsList.isEmpty()) {
            reasonsList.remove(0); // 移除首个元素
            adapterYesNo.notifyDataSetChanged(); // 通知适配器更新UI
        }
    }
});

如果坚持用数组实现（不推荐） #

因为Java数组是固定长度的，必须创建新数组后重新设置适配器：

AutoCompleteTextView aat_reason_not_presented;
aat_reason_not_presented = findViewById(R.id.aat_reason_not_presented);

String[] Reasons = new String[]{"Unclaimed", "Lost/Stolen", "Damaged/Defective", "Pawned", "Not Turned Over", "Others"};
ArrayAdapter<String> adapterYesNo = new ArrayAdapter<>(getApplicationContext(), android.R.layout.simple_spinner_item, Reasons);

adapterYesNo.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
aat_reason_not_presented.setAdapter(adapterYesNo);

aat_distribution_status.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View arg1, int pos, long id) {
        if (Reasons.length > 1) {
            // 创建长度减1的新数组
            String[] newReasons = new String[Reasons.length - 1];
            // 复制原数组从索引1开始的元素到新数组
            System.arraycopy(Reasons, 1, newReasons, 0, newReasons.length);
            Reasons = newReasons;
            // 重新创建适配器并设置给控件
            adapterYesNo = new ArrayAdapter<>(
                getApplicationContext(), 
                android.R.layout.simple_spinner_item, 
                Reasons
            );
            adapterYesNo.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
            aat_reason_not_presented.setAdapter(adapterYesNo);
        }
    }
});

内容的提问来源于stack exchange，提问作者marivic valdehueza