Android WebView HTML输入按键不会触发 [英] Android WebView HTML input keypress doesn't fire

问题描述

在某些设备(主要是三星，但也有其他设备)以及以下各项的组合上:Android版本，WebView版本(即使使用Android 7中常绿的WebView)和键盘，也存在许多问题:

On some devices (mostly Samsung, but others too) and combinations of: Android version, WebView version (even with the evergreen WebView in Android 7) and keyboard, there are a number of issues:

• keypress没有被触发
• keydown和keyup始终包含keyCode=229
• keypress和input被触发但不包含密钥
• textInput没有被触发
用户类型时，input[type=text]上不使用
• maxlength属性(允许使用超过maxlength个字符，并且仅在提交表单时才验证输入)

• keypress isn't fired
• keydown and keyup always contain keyCode=229
• keypress and input are fired but don't contain the key
• textInput isn't fired
• maxlength attribute isn't honored on input[type=text] while the user types (more than maxlength chars are allowed and the input is validated only when the form is submitted)

是否可以解决这些问题?

Is there a way to fix these issues?

推荐答案

我发现，如果扩展WebView并覆盖onCreateInputConnection，则所有这些问题均已解决:

I found that if you extend WebView and override onCreateInputConnection, all of those issues are fixed:

public class WebViewExtended extends WebView {
    @Override
    public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
        // This line fixes some issues but introduces others, YMMV.
        // super.onCreateInputConnection(outAttrs);

        return new BaseInputConnection(this, false);
    }
}

在覆盖onCreateInputConnection之前:

覆盖onCreateInputConnection后(按g键):

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