如何使用ActionDone按钮(没有Enter按钮)实现多行EditText [英] How to implement Multiline EditText with ActionDone button (without Enter button)

问题描述

我有EditText，用于在消息(电子邮件，短信)中输入内容.我希望消息立即在ActionDone按钮单击上发布.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;
            }
        }); 

但是我也希望此消息字段是多行的，就像在任何其他Messenger应用程序中一样.我可以通过以下代码来实现:

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"

问题在于，添加此行后，ActionDone按钮开始像Enter按钮一样工作.因此，从未调用用于捕获EditorInfo.IME_ACTION_DONE的回调.因此，每当用户按下该按钮时，光标就会移至新行，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.

如何保持EditText的多行行为(可以在多行上显示文本)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，在这里搜索相似的线程后，我找到了解决方案.只需在您的活动/片段上添加以下行:

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，则它将不起作用.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.但是对我来说，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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