如何突出显示文本视图中包含的部分文本？

Question

如果可能，我如何突出显示文本视图中包含的部分文本并将它们检索回代码以供其他用途？

Answer 1

您可以使用以下方法将多种样式应用于 Textview 中的字符串：

TextView textView = (TextView) findViewById(R.id.tvText);
String strFirst = "Text1";
String strSecond = "Text2";
Spannable spanTxt = new SpannableString(strFirst+strSecond);

// 将自定义字体设置为跨越 spannable 对象的一部分

spanTxt.setSpan( new CustomTypefaceSpan("sans-serif",CUSTOM_TYPEFACE),0, strFirst.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
spanTxt.setSpan(new CustomTypefaceSpan("sansserif",SECOND_CUSTOM_TYPEFACE), strFirst.length(), strFirst.length() + strSecond.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

// 使用 spannable 对象设置 textView 的文本

textView.setText( spanTxt );

尽情享受吧！

Answer 2

我终于通过使用 WebView 结合 Jquery 移动插件方法 swipe 和 Java JavascriptInteface:[=15 实现了我想做的事情=]

首先我将这个 html 文件放在项目的资产文件夹中，以便我可以将它加载到我的 WebView 中：

<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Reader</title>
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.min.css">
<script src="http://code.jquery.com/jquery-1.10.2.min.js"></script>
<script src="http://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.min.js"></script>
<script>
    function addWords(val) {
        if (val != " ")
            $("#cont").append("<span>" + val + "</span>");
        else
            $("#cont").append("&nbsp;");
    }
</script>
<style>
    html,
    body {
        padding: 0;
        margin: 0;
    }

    div.box {
        width: 30em;
        height: 3em;
        background-color: #108040;
    }

    .swipe {
        background-color: #F0A90F;
    }

    #cont {
        display: inline-block;
        margin: 5px;
        word-wrap: break-word;
    }

    span {
        word-wrap: break-word;
    }
</style>
</head>

<body>
<div id="cont">
</div>

<script>
    $(function() {
        // Bind the swipeHandler callback function to the swipe event on div.box
        $("div#cont").on("swipe", swipeHandler);

        // Callback function references the event target and adds the 'swipe' class to it
        function swipeHandler(event) {
            if ($(event.target).prop("tagName") != "DIV") {
                $(event.target).addClass("swipe");
                window.INTERFACE.getHighlightedText($(event.target).text());
            }
        }
    });
</script>

</body>

</html>

从 RSS 提要 link 获取完整的文章文本后，我将文章中的所有单词附加到 div#cont 将它们放在 span 标签中：

if(isOnline()){
        showCustomProgressDialog();
        WebView wb=(WebView)findViewById(R.id.webViewReader);
        RelativeLayout parent=(RelativeLayout)wb.getParent();
        parent.setVisibility(View.VISIBLE);
        wb.getSettings().setJavaScriptEnabled(true);
        wb.getSettings().setDomStorageEnabled(true);
        wb.addJavascriptInterface(theInterface, "INTERFACE");
        wb.getSettings().setJavaScriptCanOpenWindowsAutomatically(false);
        wb.getSettings().setSupportMultipleWindows(true);
        wb.getSettings().setUserAgentString("Mozilla/5.0 (Windows NT 6.1: it-IT) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.36");
        wb.loadUrl("file:///android_asset/index.html");
        wb.setWebViewClient(new WebViewClient() {
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                super.shouldOverrideUrlLoading(view,url);
                return false;
            }

            @Override
            public void onPageFinished(WebView view, String url) {
                super.onPageFinished(view, url);
                try {
                    JSONObject root = new JSONObject(home.getStringFromFile(getFilesDir() + "/" + home.DASHBOARDJSONFILENAME));
                    JSONObject innerObj = root.getJSONObject("dashboard").getJSONObject("lastarticle");
                    innerObj=new parseArticleFromUrl().execute("https://www.readability.com/api/content/v1/parser?url="+innerObj.getString("link").replace("\/", "/")+"&token=YOURTOKEN").get();
                    String a="Nothing found";
                    if(innerObj!=null){
                            String content = innerObj.getString("content");
                            if(content!=null){
                                Document doc=Jsoup.parse(content);
                                a=doc.text();
                            }
                    }
                    StringTokenizer tokens = new StringTokenizer(a, " ");
                    for(;tokens.hasMoreTokens();)
                    {
                        String curr_token=tokens.nextToken();
                        curr_token = curr_token.replaceAll("\"", "\\\"");
                        view.loadUrl("javascript:addWords('"+curr_token+"');");
                        view.loadUrl("javascript:addWords(' ');");
                    }
                    ldialog.dismiss();
                }catch (Exception e){
                    e.printStackTrace();
                }
            }
        });
    }

然后通过使用 JavascriptInteface class 我得到突出显示的单词的定义：

public class MyJavaScriptInterface
{
    private String strval;

    public MyJavaScriptInterface()
    {
        strval = null;
    }

    @SuppressWarnings("unused")

    @JavascriptInterface

    public void getHighlightedText(String hword)
    {
        if(!hword.isEmpty())
        {
            strval = hword;
            new getWordDefinition().execute("http://api.wordnik.com/v4/word.json/"+hword+"/definitions?limit=1&includeRelated=false&useCanonical=false&includeTags=false&api_key=a2a73e7b926c924fad7001ca3111acd55af2ffabf50eb4ae5");
        }
        else
            strval="";
    }

    public String returnHtml()
    {
        return strval;
    }
}

Results Screen

如何突出显示文本视图中包含的部分文本？

How to highlight part of the text contained in a textview?

java

android

highlight

textview