TextView 的世界绚烂多彩

1.png

2.png

比如 这样的文字效果，实现这样的效果我们先来了解一下SpannableString
SpannableString 和 String 一样，都是一种字符串类型，同样 TextView 也可以直接设置 SpannableString 作为显示文本，不同的是 SpannableString 可以通过使用其方法setSpan 方法实现字符串各种形式风格的显示,重要的是可以指定设置的区间，也就是为字符串指定下标区间内的子字符串设置格式。

setSpan(Object what, int start, int end, int flags)方法需要用户输入四个参数，
“what” ：表示设置的格式是什么，可以是前景色、背景色也可以是可点击的文本等等，
“start”：表示需要设置格式的子字符串的起始下标
“end”：表示终了下标
“flags”：属性就有意思了，共有四种属性：

//从起始下标到终了下标，包括起始下标
Spanned.SPAN_INCLUSIVE_EXCLUSIVE  
// 从起始下标到终了下标，同时包括起始下标和终了下标
Spanned.SPAN_INCLUSIVE_INCLUSIVE 
//从起始下标到终了下标，但都不包括起始下标和终了下标
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE  
//从起始下标到终了下标，包括终了下标
Spanned.SPAN_EXCLUSIVE_INCLUSIVE  

关键方法：setSpan()

支持设置的字体格式（继承 CharacterSty 均可）：

字体颜色-------ForegroundColorSpan
字体大小-------AbsoluteSizeSpan
背景颜色-------BackgroundColorSpan
超链接----------URLSpan
粗体、斜体----StyleSpan
删除线----------StrikethroughSpan
下划线----------UnderlineSpan
图片-------------ImageSpan

SpannableString spannableString06 = new SpannableString("点击淡蓝色背景文字跳转页面");
ClickableSpan clickableSpan = new MyClickableSpan("123456789");
ForegroundColorSpan colorSpan04 = new ForegroundColorSpan(Color.parseColor("#FFFFFF"));
BackgroundColorSpan backgroundColorSpan = new BackgroundColorSpan(Color.parseColor("#0099EE"));
spannableString06.setSpan(colorSpan04, 2, 9, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
spannableString06.setSpan(clickableSpan, 2, 9, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
spannableString06.setSpan(backgroundColorSpan, 2, 9, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
textView06.setText(spannableString06);
textView06.setMovementMethod(LinkMovementMethod.getInstance());

 SpannableString spannableString07 = new SpannableString("22 + 32 = 13");
        SuperscriptSpan superscriptSpan01 = new SuperscriptSpan();
        SuperscriptSpan superscriptSpan02 = new SuperscriptSpan();
        spannableString07.setSpan(superscriptSpan01, 1, 2 ,Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
        spannableString07.setSpan(superscriptSpan02, 6, 7 ,Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
        RelativeSizeSpan sizeSpan05 = new RelativeSizeSpan(0.5f);
        RelativeSizeSpan sizeSpan06 = new RelativeSizeSpan(0.5f);
        spannableString07.setSpan(sizeSpan05, 1, 2 ,Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
        spannableString07.setSpan(sizeSpan06, 6, 7 ,Spanned.SPAN_INCLUSIVE_EXCLUSIVE);

        textView07.setText(spannableString07);

SpannableString spannableString03 = new SpannableString("499");

        ForegroundColorSpan colorSpan03 = new ForegroundColorSpan(Color.parseColor("#EE0000"));
        spannableString03.setSpan(colorSpan03, 0, spannableString03.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

        RelativeSizeSpan sizeSpan03 = new RelativeSizeSpan(1.2f);
        spannableString03.setSpan(sizeSpan03, 1, spannableString03.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

        StyleSpan styleSpan03 = new StyleSpan(Typeface.BOLD);
        spannableString03.setSpan(styleSpan03, 1, spannableString03.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

        textView03.setText(spannableString03);

        SpannableString spannableString04 = new SpannableString("700");
        StrikethroughSpan strikethroughSpan = new StrikethroughSpan();
        spannableString04.setSpan(strikethroughSpan, 0, spannableString04.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

        textView04.setText(spannableString04);

 private int position = 0;
 Handler handler = new Handler() {

        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            switch (msg.what) {
                case 0x158:
                    SpannableString spannableString = new SpannableString(string);

                    RelativeSizeSpan sizeSpan = new RelativeSizeSpan(1.2f);
                    spannableString.setSpan(sizeSpan, position, position + 1, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
                    textView05.setText(spannableString);
                    position++;
                    if(position >= textView05.getText().toString().length()) {
                        position = 0;
                    }
                    handler.sendEmptyMessageDelayed(0x158, 150);
                    break;
            }
        }
    };

SpannableString spannableString01 = new SpannableString("共累计完成签到24次");

        ForegroundColorSpan colorSpan01 = new ForegroundColorSpan(Color.parseColor("#0099FF"));
        spannableString01.setSpan(colorSpan01, 7, spannableString01.length() - 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

        RelativeSizeSpan sizeSpan01 = new RelativeSizeSpan(1.3f);
        spannableString01.setSpan(sizeSpan01, 7, spannableString01.length() - 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

        StyleSpan styleSpan01 = new StyleSpan(Typeface.BOLD);
        spannableString01.setSpan(styleSpan01, 7, spannableString01.length() - 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

        textView01.setText(spannableString01);

1.png

SpannableString spannableString = new SpannableString("万丈高楼平地起");

RelativeSizeSpan sizeSpan01 = new RelativeSizeSpan(1.2f);
RelativeSizeSpan sizeSpan02 = new RelativeSizeSpan(1.4f);
RelativeSizeSpan sizeSpan03 = new RelativeSizeSpan(1.6f);
RelativeSizeSpan sizeSpan04 = new RelativeSizeSpan(1.8f);
RelativeSizeSpan sizeSpan05 = new RelativeSizeSpan(1.6f);
RelativeSizeSpan sizeSpan06 = new RelativeSizeSpan(1.4f);
RelativeSizeSpan sizeSpan07 = new RelativeSizeSpan(1.2f);

spannableString.setSpan(sizeSpan01, 0, 1, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
spannableString.setSpan(sizeSpan02, 1, 2, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
spannableString.setSpan(sizeSpan03, 2, 3, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
spannableString.setSpan(sizeSpan04, 3, 4, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
spannableString.setSpan(sizeSpan05, 4, 5, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
spannableString.setSpan(sizeSpan06, 5, 6, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
spannableString.setSpan(sizeSpan07, 6, 7, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
textView.setText(spannableString);

2.png

SpannableString spannableString = new SpannableString("为文字设置删除线");
StrikethroughSpan strikethroughSpan = new StrikethroughSpan();
spannableString.setSpan(strikethroughSpan, 5, spannableString.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
textView.setText(spannableString);

3.png

SpannableString spannableString = new SpannableString("为文字设置下划线");
UnderlineSpan underlineSpan = new UnderlineSpan();
spannableString.setSpan(underlineSpan, 5, spannableString.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
textView.setText(spannableString);

4.png

SpannableString spannableString = new SpannableString("为文字设置上标");
SuperscriptSpan superscriptSpan = new SuperscriptSpan();
spannableString.setSpan(superscriptSpan, 5, spannableString.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
textView.setText(spannableString);

5.png

SpannableString spannableString = new SpannableString("为文字设置下标");
SubscriptSpan subscriptSpan = new SubscriptSpan();
spannableString.setSpan(subscriptSpan, 5, spannableString.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
textView.setText(spannableString);

6.png

SpannableString spannableString = new SpannableString("为文字设置粗体、斜体风格");
StyleSpan styleSpan_B  = new StyleSpan(Typeface.BOLD);
StyleSpan styleSpan_I  = new StyleSpan(Typeface.ITALIC);
spannableString.setSpan(styleSpan_B, 5, 7, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
spannableString.setSpan(styleSpan_I, 8, 10, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
textView.setHighlightColor(Color.parseColor("#36969696"));
textView.setText(spannableString);

7.png

SpannableString spannableString = new SpannableString("在文本中添加表情（表情）");
Drawable drawable = getResources().getDrawable(R.mipmap.a9c);
drawable.setBounds(0, 0, 42, 42);
ImageSpan imageSpan = new ImageSpan(drawable);
spannableString.setSpan(imageSpan, 6, 8, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
textView.setText(spannableString);