防止在 EditText 上输入键，但仍将文本显示为多行

Prevent enter key on EditText but still show the text as multi-line(防止在 EditText 上输入键，但仍将文本显示为多行)

问题描述

如何在 Android 上制作 EditText，这样用户可能不会输入多行文本，但显示仍然是多行的(即，有自动换行而不是向右移动的文本)?

How do I make an EditText on Android such that the user may not enter a multi-line text, but the display is still multi-line (i.e. there is word-wrap instead of the text going over to the right)?

类似于内置短信应用，我们不能输入换行符，但文本显示为多行.

It's similar to the built-in SMS application where we can't input newline but the text is displayed in multiple lines.

推荐答案

我将子类化小部件并覆盖键事件处理以阻止 Enter 键:

I would subclass the widget and override the key event handling in order to block the Enter key:

class MyTextView extends EditText
{
    ...
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event)
    {
        if (keyCode==KeyEvent.KEYCODE_ENTER) 
        {
            // Just ignore the [Enter] key
            return true;
        }
        // Handle all other keys in the default way
        return super.onKeyDown(keyCode, event);
    }
}

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