Android：将 onClickListener 设置为 TextView 中的部分文本 - 问题答案

【问题标题】：Android: Setting onClickListener to a Part of text in a TextView - IssueAndroid：将 onClickListener 设置为 TextView 中的部分文本 - 问题
【发布时间】：2015-12-31 05:06:24
【问题描述】：

我正在尝试识别我的 TextView 中的主题标签并使其可点击，以便当用户单击该主题标签时我可以将他们带到另一个视图。

我设法使用模式匹配在 TextView 中识别 Hashtags，它们在运行时显示为彩色。但是，我需要使 Hashtag 可点击。

这是我的代码：

 SpannableString hashText = new SpannableString("I just watched #StarWars and it was incredible. It's a #MustWatch #StarWars");
 Matcher matcher = Pattern.compile("#([A-Za-z0-9_-]+)").matcher(hashText);

 while (matcher.find())
 {
          hashText.setSpan(new ForegroundColorSpan(Color.parseColor("#000763")), matcher.start(), matcher.end(), 0);
          String tag = matcher.group(0);
 }

 holder.caption.setText(hashText);

 //I need to set an OnClick listener to all the Hashtags recognised

使用上述相同的解决方案，如何将 onclick 侦听器添加到每个主题标签？

【问题讨论】：

有图书馆可以做同样的事情，看看这个：github.com/Danylo2006/HashTagHelper
@SachinRao 看起来该库不适用于最低 sdk 9 :(
尝试将 2 个 java 文件粘贴到您的任何包中。（HashTagHelper 和 ClickableForegroundColorSpan）

标签： java android android-activity mobile onclicklistener

【解决方案1】：

有一种方法......在看到你的问题后，我只是在谷歌搜索......我发现了这个，我希望它会工作......

1。你可以使用android.text.style.ClickableSpanlink

SpannableString ss = new SpannableString("Hello World");
    ClickableSpan span1 = new ClickableSpan() {
        @Override
        public void onClick(View textView) {
            // do some thing
        }
    };

    ClickableSpan span2 = new ClickableSpan() {
        @Override
        public void onClick(View textView) {
            // do another thing
        }
    };

    ss.setSpan(span1, 0, 4, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
    ss.setSpan(span2, 6, 10, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

    textView.setText(ss);
    textView.setMovementMethod(LinkMovementMethod.getInstance());

另一种方式..link

 TextView myTextView = new TextView(this);
    String myString = "Some text [clickable]";
    int i1 = myString.indexOf("[");
    int i2 = myString.indexOf("]");
    myTextView.setMovementMethod(LinkMovementMethod.getInstance());
    myTextView.setText(myString, BufferType.SPANNABLE);
    Spannable mySpannable = (Spannable)myTextView.getText();
    ClickableSpan myClickableSpan = new ClickableSpan()
    {
     @Override
     public void onClick(View widget) { /* do something */ }
    };
    mySpannable.setSpan(myClickableSpan, i1, i2 + 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

刚刚从那些链接复制的答案...

【讨论】：

【解决方案2】：

是的，你可以做到，你需要使用ClickableSpan和SpannableString

将此代码粘贴到您的 while 循环中

final String tag = matcher.group(0);
ClickableSpan clickableSpan = new ClickableSpan() {
                @Override
                public void onClick(View textView) {
                    Log.e("click","click " + tag);
                }
                @Override
                public void updateDrawState(TextPaint ds) {
                    super.updateDrawState(ds);

                }
            };
            hashText.setSpan(clickableSpan, matcher.start(), matcher.end(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

别忘了在你的TextView上设置setMovementMethod()

holder.caption.setMovementMethod(LinkMovementMethod.getInstance());

【讨论】：

【解决方案3】：

您可以使用此代码通过 textview 中的可点击任意键（@，#）文本更改颜色。我使用此格式。它在我身边很好用。

private void setTags(TextView pTextView, String pTagString) {
    SpannableString string = new SpannableString(pTagString);

    int start = -1;

    for (int i = 0; i < pTagString.length(); i++) {
        if (pTagString.charAt(i) == '@' || pTagString.charAt(i) == '#') {               
            start = i;

        } else if (pTagString.charAt(i) == ' '
                || (i == pTagString.length() - 1 && start != -1)) {
            if (start != -1) {
                if (i == pTagString.length() - 1) {
                    i++; // case for if hash is last word and there is no
                            // space after word
                }

                final String tag = pTagString.substring(start, i);              
                string.setSpan(new ClickableSpan() {

                    @Override
                    public void onClick(View widget) {

                        Toast.makeText(mContext, "" + tag, 3000)
                                .show();
                    }
                    @Override
                    public void updateDrawState(TextPaint ds) {

                        if (tag.contains("@"))
                            ds.setColor(Color.parseColor("#0474be"));
                        else
                            ds.setColor(Color.parseColor("#ed6057"));

                        ds.setUnderlineText(false);
                    }
                }, start, i, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
                start = -1;
            }
        }
    }

    pTextView.setMovementMethod(LinkMovementMethod.getInstance());
    pTextView.setText(string);
}

请尝试这种方式希望可以解决您的问题。

【讨论】：

【解决方案4】：

//得到但没有模式匹配

    SpannableString hashText = new SpannableString("I just watched #StarWars and it was incredible. It's a #MustWatch #StarWars");



    ClickableSpan clickableSpanstar1stWarsHashText = new ClickableSpan() {
        @Override
        public void onClick(View widget) {
            //Intent starWars = new Intent(MainActivity.this,starWars.class); //starWars is a class file which extends Activity
            //startActivity(starWars);
            Toast.makeText(MainActivity.this,"Clicked On 1st #StarWars Remove comments of above line",Toast.LENGTH_LONG).show();
        }
    };

    ClickableSpan clickableSpanmustWatchHashText = new ClickableSpan() {
        @Override
        public void onClick(View widget) {
            //Intent mustWatch = new Intent(MainActivity.this,mustWatch.class); //starWars is a class file which extends Activity
            //startActivity(mustWatch);
            Toast.makeText(MainActivity.this,"Clicked On #MustWatch Remove comments of above line",Toast.LENGTH_LONG).show();
        }
    };

    ClickableSpan clickableSpanstar2ndWarsHashText = new ClickableSpan() {
        @Override
        public void onClick(View widget) {
            //Intent starWars = new Intent(MainActivity.this,starWars.class); //starWars is a class file which extends Activity
            //startActivity(starWars);
            Toast.makeText(MainActivity.this,"Clicked On 2nd #StarWars Remove comments of above line",Toast.LENGTH_LONG).show();
        }
    };

    hashText.setSpan(clickableSpanstar1stWarsHashText,15,24, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
    hashText.setSpan(clickableSpanmustWatchHashText, 55, 65, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
    hashText.setSpan(clickableSpanstar2ndWarsHashText,66,75, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);




    //SpannableString hashText = new SpannableString("I just watched #StarWars and it was incredible. It's a #MustWatch #StarWars");

    TextView  textView = (TextView) findViewById(R.id.textView); //textView id i.e. android:id="@+id/textView"
    textView.setText(hashText);
    textView.setMovementMethod(LinkMovementMethod.getInstance());
    textView.setHighlightColor(Color.TRANSPARENT);

【讨论】：

【解决方案5】：

您可以为此使用android.text.style.ClickableSpan：参考answer

【讨论】：

【解决方案6】：

您可以通过使用split 函数并在Layout 中填充textview's 来实现它，如下所示：

 layout=(LinearLayout)findViewById(R.id.layout);
 String data="I just watched #StarWars and it was incredible. It's a #MustWatch #StarWars";
TextView textView;
     String [] s=data.split(" ");
     for(int i=0;i<s.length;i++){
         if(s[i].matches("#([A-Za-z0-9_-]+)")){

              textView=new TextView(this);
              textView.setText(s[i]);
              textView.setTextColor(Color.parseColor("#000763"));
              textView.setTag(s[i]);
              textView.setOnClickListener(viewClicked(textView));
         }else{
             textView=new TextView(this);
              textView.setText(" "+s[i]);
         }
         layout.addView(textView,i);
     }

以及处理点击事件到所需Textview's的方法：

 View.OnClickListener viewClicked(final TextView textView)  {
    return new View.OnClickListener() {
        public void onClick(View v) {
            Toast.makeText(getApplicationContext(), v.getTag().toString(), 1000).show();

        }
    };
}

【讨论】：

【解决方案7】：

我遇到了类似的问题——我不得不对点击的部分文本做某事，但字符串是在运行时创建的。也许它会对某人有所帮助 - 在这个解决方案中，我们不关心在整个文本中找到 indexStart、indexEnd（这可能非常糟糕）等：

 val action1ClickedSpan = object : ClickableSpan() {
     override fun onClick(widget: View?) {
          presenter.action1Clicked()
     }
 }

 val possibleActionsHint = SpannableStringBuilder().apply {
     val action1Start = this.length
     append(getString(R.string.action1))
     val action2Start = this.length

     append(...)
     append(...) 

     val action2Start = this.length
     append(getString(R.string.action1))
     val action2End = this.length

     setSpan(action1ClickedSpan, action1Start, action1End, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
     setSpan(...)
 }

 this.possibleActionsTextView.apply {
     text = possibleActionsHint
     movementMethod = LinkMovementMethod.getInstance()
 }

【讨论】：