如何使用 ActionDone 按钮(不带 Enter 按钮)实现多行

How to implement Multiline EditText with ActionDone button (without Enter button)(如何使用 ActionDone 按钮(不带 Enter 按钮)实现多行 EditText)

问题描述

我有用于在消息(电子邮件、短信)上输入内容的 EditText.我希望在单击 ActionDone 按钮时立即发布消息.我为此使用以下代码:

I have EditText which is used for entering contents on messages (emails, sms). I want message to be immediately posted on ActionDone button click. I use following code for this:

message.setOnEditorActionListener((textView, i, keyEvent) -> {
            switch (i) {
                case EditorInfo.IME_ACTION_DONE:
                    if (messageCanBePosted()) {
                        SoftKeyboard.hide(message);
                        postMessage();
                        return true;
                    } else {
                        return false;
                    }
                default:
                    return false;
            }
        }); 

但我也希望这个消息字段是多行的，就像在任何其他信使应用程序中一样.我可以用这条线来实现它:

But also I want this message field to be multiline, like in any other messenger apps. I can achieve it with this line:

android:inputType="textMultiLine"

问题是在添加这一行之后 ActionDone 按钮开始像 Enter 按钮一样起作用.所以我捕获 EditorInfo.IME_ACTION_DONE 的回调永远不会被调用.因此，每次用户按下该按钮时，光标都会移动到新行而不是发布消息.

The problem is that after adding this line ActionDone button starts acting like Enter button. So my callback for catching EditorInfo.IME_ACTION_DONE is never called. So each time user press that button cursor moves to new line instead of posting message.

如何同时保留 EditText 的多行行为(在多行上显示文本的能力)和 ActionDone 按钮?

How can I keep both multiline behavior of EditText (ability to show text on multiple lines) and ActionDone button?

推荐答案

最后，在这里搜索类似的线程后，我找到了解决方案.只需在您的 Activity/Fragment 上添加这些行:

Finally, after searching here for similar threads I have found solution. Just need to add these lines on your Activity/Fragment:

editText.setHorizontallyScrolling(false);
editText.setMaxLines(Integer.MAX_VALUE);

由于某种原因，如果您从 xml 应用完全相同的设置，它将不起作用.您应该以编程方式进行.

For some reason it doesn't work if you apply exact same setting from xml. You should do it programmatically.

还有另一种可能的解决方案 - 从 EditText 派生并手动应用 EditorInfo.IME_ACTION_DONE.但对我来说，第一个解决方案看起来更简单.

There is also another possible solution - derive from EditText and apply EditorInfo.IME_ACTION_DONE manually. But for me first solution looks simpler.

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