Android 在TextView里设置HTM…

Android 在TextView里设置HTML

There is a lovely method on theandroid.text.Html  class,fromHtml() , that converts HTML into aSpannable  for use with aTextView .

However, the documentation does not stipulate what HTML tags aresupported, which makes this method a bit hit-or-miss. Moreimportantly, it means that you cannot rely on what it will supportfrom release to release.

I have filed an issue  requestingthat Google formally document what it intends to support. In theinterim, from a quick look at the source code, here’s what seems tobe supported as of Android 2.1:

      定义链接内容
     定义粗体文字  b 是blod的缩写
     定义大字体的文字
  

  引用块标签 
       属性:
         Common  --一般属性
         cite  --被引用内容的URI
   
   定义换行
      表示引用的URI
      定义标签  dfn是defining instance的缩写
   

     强调标签  em是emphasis的缩写
   
   

   

   

   

   

   

      定义斜体文字
   
   

    段落标签,里面可以加入文字,列表,表格等
     定义小字体的文字
      定义删除线样式的文字  不符合标准网页设计的理念,不赞成使用.  strike是strikethrough的缩写
      重点强调标签
      _{下标标签   sub是subscript的缩写}
      ^{上标标签   sup是superscript的缩写}
      定义monospaced字体的文字  不赞成使用.  此标签对中文没意义  tt是teletypeor monospaced text style的意思
      定义带有下划线的文字  u是underlinedtext style的意思


一、在xml文件中使用android:textStyle=”bold”

二、但是不能将中文设置成粗体，将中文设置成粗体的方法是： 

TextView tv =  ( TextView)findViewById( R. id . TextView01);  
TextPaint tp =  tv. getPaint ( );  
tp. setFakeBoldText( true) ;


Selecting, Highlighting, or Styling Portions ofText

You can highlight or style the formatting of strings or substringsof text in a TextView object. There are two ways to dothis:

If you use a string resource, you can add some simple styling, suchas bold or italic using HTML notation. The currently supported tagsare: B (bold), I (italic), U (underline), TT (monospace), BIG,SMALL, SUP (superscript), SUB (subscript), and STRIKE(strikethrough). So, for example, in res/values/strings.xml youcould declare this:

   id="@+id/styled_welcome_message">We are so glad tosee you.

To style text on the fly, or to add highlighting or more complexstyling, you must use the Spannable object as describednext.
To style text on the fly, you must make sure the TextView is usingSpannable storage for the text (this will always be true if theTextView is an EditText), retrieve its text with getText(), andcall setSpan(Object, int, int, int), passing in a new style classfrom the android.text.style package and the selectionrange.

The following code snippet demonstrates creating a string with ahighlighted section, italic section, and bold section, and addingit to an EditText object.

// Get our EditText object.
EditText vw = (EditText)findViewById(R.id.text);

// Set the EditText's text.
vw.setText("Italic, highlighted, bold.");

// If this were just a TextView, we could do:
// vw.setText("Italic, highlighted, bold.",TextView.BufferType.SPANNABLE);
// to force it to use Spannable storage so styles can beattached.
// Or we could specify that in the XML.

// Get the EditText's internal text storage
Spannable str = vw.getText();

// Create our span sections, and assign a format toeach.
str.setSpan(new StyleSpan(android.graphics.Typeface.ITALIC), 0, 7,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
str.setSpan(new BackgroundColorSpan(0xFFFFFF00), 8, 19,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
str.setSpan(new StyleSpan(android.graphics.Typeface.BOLD), 21,str.length() - 1,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

I sometimes have the case to arrange the image next to thecharacters.
We can do it by putting TextView and ImageView intoLayout.
But today I introduce the other way using onlyTextView.
The following sample code is how to show the image next totext.
(show four image(left, top, right, bottom oftext))


final TextView textView =(TextView)findViewById(R.id.diet_log_label);
final Drawable iconDrawable =getResources().getDrawable(R.drawable.icon);
textView.setCompoundDrawablesWithIntrinsicBounds(iconDrawable,iconDrawable, iconDrawable, iconDrawable);
// or
textView.setCompoundDrawablesWithIntrinsicBounds(R.drawable.icon,R.drawable.icon, R.drawable.icon,R.drawable.icon);


To show only left image, write"setCompoundDrawablesWithIntrinsicBounds(iconDrawable, null, null,null)"