Android中EditText用作标签时，如何禁用词典联想及退格删除功能？

Hey there! I get it—using EditText as a tag display comes with some unexpected behavior when those input settings don't stick. Let's break down the fixes for both issues step by step:

1. 彻底禁用词典联想功能 #

The textNoSuggestions flag can be hit-or-miss depending on the device's keyboard app (some OEM keyboards ignore it entirely). Try this combined approach to cover most cases:

在XML布局中添加这些属性： #

<EditText
    ...
    android:inputType="textMultiLine|textNoSuggestions|textVisiblePassword"
    android:privateImeOptions="nm"
    android:cursorVisible="false"
    android:textIsSelectable="false" />

• textVisiblePassword: Forces nearly all keyboards to disable suggestions (since password fields never show predictive text)
• privateImeOptions="nm": A private flag that works for many OEM keyboards (like Samsung, Xiaomi) to explicitly turn off suggestions

在代码中强化设置（确保覆盖所有场景）： #

editText.setInputType(InputType.TYPE_CLASS_TEXT 
        | InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS 
        | InputType.TYPE_TEXT_FLAG_MULTI_LINE 
        | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
// 额外针对顽固输入法的私有设置
editText.setPrivateImeOptions("nm");

2. 禁用退格键删除单词/句子的功能 #

This behavior is controlled by the keyboard app itself, so we need to intercept the backspace key event and handle it manually to only delete single characters:

添加OnKeyListener拦截退格事件： #

editText.setOnKeyListener((view, keyCode, event) -> {
    if (keyCode == KeyEvent.KEYCODE_DEL && event.getAction() == KeyEvent.ACTION_DOWN) {
        Editable editable = editText.getText();
        int selectionStart = editText.getSelectionStart();
        int selectionEnd = editText.getSelectionEnd();
        
        if (selectionStart != selectionEnd) {
            // 有选中文本时，仅删除选中部分
            editable.delete(selectionStart, selectionEnd);
        } else if (selectionStart > 0) {
            // 无选中时，仅删除光标前一个字符
            editable.delete(selectionStart - 1, selectionStart);
        }
        // 返回true表示我们已经处理了事件，不让键盘再执行批量删除逻辑
        return true;
    }
    return false;
});

额外小提示： #

If your tag display doesn't require user editing at all, consider switching to a TextView instead—it's more lightweight and avoids all these input-related headaches from the start!

内容的提问来源于stack exchange，提问作者tranquil