android 各种 span的生成 如 修改TextView中部分文字的颜色 ，生成图片span

               

  textView = (TextView) findViewById(R.id.textview);  SpannableStringBuilder builder = new SpannableStringBuilder(textView.getText().toString());    //ForegroundColorSpan 为文字前景色，BackgroundColorSpan为文字背景色  ForegroundColorSpan redSpan = new ForegroundColorSpan(Color.RED);  ForegroundColorSpan whiteSpan = new ForegroundColorSpan(Color.WHITE);  ForegroundColorSpan blueSpan = new ForegroundColorSpan(Color.BLUE);  ForegroundColorSpan greenSpan = new ForegroundColorSpan(Color.GREEN);  ForegroundColorSpan yellowSpan = new ForegroundColorSpan(Color.YELLOW);    builder.setSpan(redSpan, 0, 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);  builder.setSpan(whiteSpan, 1, 2, Spannable.SPAN_INCLUSIVE_INCLUSIVE);  builder.setSpan(blueSpan, 2, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);  builder.setSpan(greenSpan, 3, 4, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);  builder.setSpan(yellowSpan, 4,5, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);    textView.setText(builder);

 

 2) BackgroundColorSpan 文本背景色

private void setBackgroundColorSpan() {      SpannableString spanString = new SpannableString("背景色");      BackgroundColorSpan span = new BackgroundColorSpan(Color.YELLOW);      spanString.setSpan(span, 0, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);      tv.append(spanString);  } 

3) StyleSpan         字体样式：粗体、斜体等

private void setStyleSpan() {      SpannableString spanString = new SpannableString("粗体斜体");      StyleSpan span = new StyleSpan(Typeface.BOLD_ITALIC);      spanString.setSpan(span, 0, 4, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);      tv.append(spanString);  }  

 

 4)RelativeSizeSpan  相对大小

private void setRelativeFontSpan() { SpannableString spanString = new SpannableString("字体相对大小"); spanString.setSpan(new RelativeSizeSpan(2.5f), 0, 6,Spannable.SPAN_INCLUSIVE_EXCLUSIVE); tv.append(spanString);    }

 

5) TypefaceSpan         文本字体

private void setTypefaceSpan() { SpannableString spanString = new SpannableString("文本字体"); spanString.setSpan(new TypefaceSpan("monospace"), 0, 4, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); tv.append(spanText);}

6) URLSpan 文本超链接

private void addUrlSpan() {      SpannableString spanString = new SpannableString("超链接");      URLSpan span = new URLSpan("http://www.baidu.com");      spanString.setSpan(span, 0, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);      tv.append(spanString);  }  

7) ImageSpan         图片

private void addImageSpan() {      SpannableString spanString = new SpannableString("3 ");      Drawable d = getResources().getDrawable(R.drawable.ic_launcher);      d.setBounds(0, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight());      ImageSpan span = new ImageSpan(d, ImageSpan.ALIGN_BASELINE);      spanString.setSpan(span, 0, 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);      tv.append(spanString);  } 

 注意new SpannableString后面 添加了"3空格"3是的占位符号随意，  空格一定要有的，不然回到导致下面BUG：

1.连续输入多次imageSpan的时候：在换行的时候，会导致上面的一行ImageSpan消失

下面是我自己使用的方法，发现这个Bitmap转换成ImageSpan,比较精确的高度 /**  * 将文字 生成 文字图片 生成显示编码的Bitmap,目前这个方法是可用的  *   * @param contents  * @param context  * @return  */ public static Bitmap creatCodeBitmap(String contents ,Context context) {  float scale=context.getResources().getDisplayMetrics().scaledDensity;    TextView tv = new TextView(context);  LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(    LinearLayout.LayoutParams.MATCH_PARENT,    LinearLayout.LayoutParams.WRAP_CONTENT);  tv.setLayoutParams(layoutParams);  tv.setText(contents);  tv.setTextSize(scale*12);  tv.setGravity(Gravity.CENTER_HORIZONTAL);  tv.setDrawingCacheEnabled(true);  tv.setTextColor(Color.BLACK);  tv.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED),    MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));  tv.layout(0, 0, tv.getMeasuredWidth(), tv.getMeasuredHeight());  tv.setBackgroundColor(Color.GREEN);    tv.buildDrawingCache();  Bitmap bitmapCode = tv.getDrawingCache();  return bitmapCode; }

Android中 Bitmap和Drawable相互转换的方法 

8) ClickableSpan                 文本有点击事件

private TextView textView;textView = (TextView)this.findViewById(R.id.textView);String text = "显示Activity";SpannableString spannableString = new SpannableString(text);spannableString.setSpan(new ClickableSpan() { @Override public void onClick(View widget) {  Intent intent = new Intent(Main.this,OtherActivity.class);  startActivity(intent); } // 表示点击整个text的长度都有效触发这个事件}, 0, text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);textView.setText(spannableString);textView.setMovementMethod(LinkMovementMethod.getInstance());

9) UnderlineSpan         下划线

private void addUnderLineSpan() {      SpannableString spanString = new SpannableString("下划线");      UnderlineSpan span = new UnderlineSpan();      spanString.setSpan(span, 0, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);      tv.append(spanString);  } 

10) StrikethroughSpan  删除线

private void addStrikeSpan() {      SpannableString spanString = new SpannableString("删除线");      StrikethroughSpan span = new StrikethroughSpan();      spanString.setSpan(span, 0, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);      tv.append(spanString);  }  

 

11) SuggestionSpan  相当于占位符
 

12) MaskFilterSpan  修饰效果，如模糊(BlurMaskFilter)、浮雕(EmbossMaskFilter)
 

13) RasterizerSpan   光栅效果
 

14) AbsoluteSizeSpan   绝对大小（文本字体）

private void setAbsoluteFontSpan() {  SpannableString spannableString = new SpannableString("40号字体");  AbsoluteSizeSpan absoluteSizeSpan = new AbsoluteSizeSpan(40);  spannableString.setSpan(absoluteSizeSpan, 0, 5, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);  editText.append(spannableString);}

15) DynamicDrawableSpan    设置图片，基于文本基线或底部对齐。

 

16) TextAppearanceSpan 文本外貌（包括字体、大小、样式和颜色）

private void setTextAppearanceSpan() { SpannableString spanString = new SpannableString("文本外貌"); TextAppearanceSpan textAppearanceSpan = new TextAppearanceSpan(this, android.R.style.TextAppearance_Medium)； spanString.setSpan(textAppearanceSpan, 0, 4, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); tv.append(spanString);}

 

http://blog.youkuaiyun.com/llping2011/article/details/10301291#