在Android中设置TextView span的颜色

时间:2010-07-19 16:27:01

标签: android text formatting textview

是否可以在TextView中设置文本范围的颜色?

我想做一些类似于Twitter应用程序的东西,其中部分文本是蓝色的。见下图:

alt text

17 个答案:

答案 0 :(得分:380)

另一个答案非常相似,但不需要设置TextView两次的文本

TextView TV = (TextView)findViewById(R.id.mytextview01);

Spannable wordtoSpan = new SpannableString("I know just how to whisper, And I know just how to cry,I know just where to find the answers");        

wordtoSpan.setSpan(new ForegroundColorSpan(Color.BLUE), 15, 30, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

TV.setText(wordtoSpan);

答案 1 :(得分:77)

这是一个小帮助功能。非常适合您有多种语言的时候!

private void setColor(TextView view, String fulltext, String subtext, int color) {
    view.setText(fulltext, TextView.BufferType.SPANNABLE);
    Spannable str = (Spannable) view.getText();
    int i = fulltext.indexOf(subtext);
    str.setSpan(new ForegroundColorSpan(color), i, i + subtext.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}

答案 2 :(得分:26)

如果您想要更多控制权,可能需要查看TextPaint课程。以下是如何使用它:

final ClickableSpan clickableSpan = new ClickableSpan() {
    @Override
    public void onClick(final View textView) {
        //Your onClick code here
    }

    @Override
    public void updateDrawState(final TextPaint textPaint) {
        textPaint.setColor(yourContext.getResources().getColor(R.color.orange));
        textPaint.setUnderlineText(true);
    }
};

答案 3 :(得分:25)

在尝试理解新概念时,我总能找到有用的视觉示例。

背景颜色

enter image description here

SpannableString spannableString = new SpannableString("Hello World!");
BackgroundColorSpan backgroundSpan = new BackgroundColorSpan(Color.YELLOW);
spannableString.setSpan(backgroundSpan, 0, spannableString.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
textView.setText(spannableString);

前景色

enter image description here

SpannableString spannableString = new SpannableString("Hello World!");
ForegroundColorSpan foregroundSpan = new ForegroundColorSpan(Color.RED);
spannableString.setSpan(foregroundSpan, 0, spannableString.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
textView.setText(spannableString);

组合

enter image description here

SpannableString spannableString = new SpannableString("Hello World!");
ForegroundColorSpan foregroundSpan = new ForegroundColorSpan(Color.RED);
BackgroundColorSpan backgroundSpan = new BackgroundColorSpan(Color.YELLOW);
spannableString.setSpan(foregroundSpan, 0, 8, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
spannableString.setSpan(backgroundSpan, 3, spannableString.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
textView.setText(spannableString);

进一步研究

答案 4 :(得分:18)

设置TextView的文字范围,并为您的文字定义ForegroundColorSpan

TextView textView = (TextView)findViewById(R.id.mytextview01);    
Spannable wordtoSpan = new SpannableString("I know just how to whisper, And I know just how to cry,I know just where to find the answers");          
wordtoSpan.setSpan(new ForegroundColorSpan(Color.BLUE), 15, 30, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);    
textView.setText(wordtoSpan);

答案 5 :(得分:12)

在某些情况下可以使用的另一种方法是在采用Spannable的视图的属性中设置链接颜色。

例如,如果您的Spannable将用于TextView,您可以在XML中设置链接颜色,如下所示:

<TextView
    android:id="@+id/myTextView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textColorLink="@color/your_color"
</TextView>

您也可以使用以下代码在代码中进行设置:

TextView tv = (TextView) findViewById(R.id.myTextView);
tv.setLinkTextColor(your_color);

答案 6 :(得分:5)

有一个工厂用于创建Spannable,并避免演员,如下所示:

Spannable span = Spannable.Factory.getInstance().newSpannable("text");

答案 7 :(得分:5)

通过传递字符串颜色文字

设置颜色

private String getColoredSpanned(String text, String color) {
  String input = "<font color=" + color + ">" + text + "</font>";
  return input;
}
通过调用以下代码

TextView / Button / EditText 等设置文字

<强> TextView的:

TextView txtView = (TextView)findViewById(R.id.txtView);

获取彩色字符串:

String name = getColoredSpanned("Hiren", "#800000");

在TextView上设置文字:

txtView.setText(Html.fromHtml(name));

完成

答案 8 :(得分:2)

String text = "I don't like Hasina.";
textView.setText(spannableString(text, 8, 14));

private SpannableString spannableString(String text, int start, int end) {
    SpannableString spannableString = new SpannableString(text);
    ColorStateList redColor = new ColorStateList(new int[][]{new int[]{}}, new int[]{0xffa10901});
    TextAppearanceSpan highlightSpan = new TextAppearanceSpan(null, Typeface.BOLD, -1, redColor, null);

    spannableString.setSpan(highlightSpan, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    spannableString.setSpan(new BackgroundColorSpan(0xFFFCFF48), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    spannableString.setSpan(new RelativeSizeSpan(1.5f), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

    return spannableString;
}

输出:

enter image description here

答案 9 :(得分:1)

只需添加到接受的答案中,因为所有答案似乎都只涉及android.graphics.Color:如果我想要的颜色在res/values/colors.xml中定义了怎么办?

例如,考虑在colors.xml中定义的Material Design colors

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="md_blue_500">#2196F3</color>
</resources>

android_material_design_colours.xml是你最好的朋友)

然后在使用ContextCompat.getColor(getContext(), R.color.md_blue_500)的地方使用Color.BLUE,这样:

wordtoSpan.setSpan(new ForegroundColorSpan(Color.BLUE), 15, 30, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

成为:

wordtoSpan.setSpan(new ForegroundColorSpan(ContextCompat.getColor(getContext(), R.color.md_blue_500)), 15, 30, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

我发现的地方:

答案 10 :(得分:1)

这是我为此提供的Kotlin扩展功能

    fun TextView.setColouredSpan(word: String, color: Int) {
        val spannableString = SpannableString(text)
        val start = text.indexOf(word)
        val end = text.indexOf(word) + word.length
        try {
            spannableString.setSpan(ForegroundColorSpan(color), start, end,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
            text = spannableString
        } catch (e: IndexOutOfBoundsException) {
         println("'$word' was not not found in TextView text")
    }
}

将文本设置为TextView后使用它

private val blueberry by lazy { getColor(R.color.blueberry) }

textViewTip.setColouredSpan("Warning", blueberry)

答案 11 :(得分:1)

这里的一些答案不是最新的。因为,(大多数情况下)您会在链接上添加自定义clic操作

此外,根据文档帮助提供的内容,跨字符串链接颜色将具有默认值。 “如果在主题中定义了此属性,则默认链接颜色是主题的强调色或android:textColorLink”。

这是安全的方法。

 private class CustomClickableSpan extends ClickableSpan {

    private int color = -1;

    public CustomClickableSpan(){
        super();
        if(getContext() != null) {
            color = ContextCompat.getColor(getContext(), R.color.colorPrimaryDark);
        }
    }

    @Override
    public void updateDrawState(@NonNull TextPaint ds) {
        ds.setColor(color != -1 ? color : ds.linkColor);
        ds.setUnderlineText(true);
    }

    @Override
    public void onClick(@NonNull View widget) {
    }
}

然后使用它。

   String text = "my text with action";
    hideText= new SpannableString(text);
    hideText.setSpan(new CustomClickableSpan(){

        @Override
        public void onClick(@NonNull View widget) {
            // your action here !
        }

    }, 0, text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
    yourtextview.setText(hideText);
    // don't forget this ! or this will not work !
    yourtextview.setMovementMethod(LinkMovementMethod.getInstance());

希望这对您有很大帮助!

答案 12 :(得分:1)

在开发人员文档中,更改跨度的颜色和大小:

1-创建一个类:

    class RelativeSizeColorSpan(size: Float,@ColorInt private val color: Int): RelativeSizeSpan(size) {

    override fun updateDrawState(textPaint: TextPaint?) {
        super.updateDrawState(textPaint)
        textPaint?.color = color
    } 
}

2使用该类创建您的跨度:

    val spannable = SpannableStringBuilder(titleNames)
spannable.setSpan(
    RelativeSizeColorSpan(1.5f, Color.CYAN), // Increase size by 50%
    titleNames.length - microbe.name.length, // start
    titleNames.length, // end
    Spannable.SPAN_EXCLUSIVE_INCLUSIVE
)

答案 13 :(得分:0)

你可以在 Kotlin 中使用扩展函数

fun CharSequence.colorizeText(
    textPartToColorize: CharSequence,
    @ColorInt color: Int
): CharSequence = SpannableString(this).apply {
    val startIndexOfText = this.indexOf(textPartToColorize.toString())
    setSpan(ForegroundColorSpan(color), startIndexOfText, startIndexOfText.plus(textPartToColorize.length), 0)
}

用法:

val colorizedText = "this text will be colorized"
val myTextToColorize = "some text, $colorizedText continue normal text".colorizeText(colorizedText,ContextCompat.getColor(context, R.color.someColor))
viewBinding.myTextView.text = myTextToColorize

答案 14 :(得分:0)

Textview Span

使用kotlin-ktx,可以轻松实现

        bindView?.oneTimePasswordTitle?.text = buildSpannedString {
        append("One Time Password ")
        inSpans(
            ForegroundColorSpan(ContextCompat.getColor(bindView?.oneTimePasswordTitle?.context!!,R.color.colorPrimaryText))
        ){
            append(" (As Registered Email)")
        }

    }

答案 15 :(得分:0)

下面对我来说很完美

    tvPrivacyPolicy = (TextView) findViewById(R.id.tvPrivacyPolicy);
    String originalText = (String)tvPrivacyPolicy.getText();
    int startPosition = 15;
    int endPosition = 31;

    SpannableString spannableStr = new SpannableString(originalText);
    UnderlineSpan underlineSpan = new UnderlineSpan();
    spannableStr.setSpan(underlineSpan, startPosition, endPosition, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);

    ForegroundColorSpan backgroundColorSpan = new ForegroundColorSpan(Color.BLUE);
    spannableStr.setSpan(backgroundColorSpan, startPosition, endPosition, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);

    StyleSpan styleSpanItalic  = new StyleSpan(Typeface.BOLD);

    spannableStr.setSpan(styleSpanItalic, startPosition, endPosition, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);

    tvPrivacyPolicy.setText(spannableStr);

上述代码的输出

enter image description here

答案 16 :(得分:0)

  1. 在您的布局中创建textview
  2. 将此代码粘贴到您的MainActivity

    (function(){...});