Android：使用LeadingMarginSpan在textview中显示项目符号列表？

我想在textview中显示一个项目符号列表。我可以使用子弹头弹，但子弹不是很有吸引力，似乎也没有定制它的方法。我想为我的项目符号列表使用默认的项目符号（•）。有没有使用LeadingMarginSpan获得我想要的效果的方法？基本上，如果行以子弹开头，我希望它与左边对齐，但是如果行太长以至于它断开，那么下一行的文本（断开的文本）应该缩进到与文本之后的文本相同的级别子弹点。Android：使用LeadingMarginSpan在textview中显示项目符号列表？

* for example 
instead of this 

* for example 
    should look like this

我当前的代码：

String[] bulletpoint = {some array of strings}; 
CharSequence allText = ""; 

for (int i = 0; i < bulletpoint.length; i++) { 
    String text = bulletpoint[i]; 
    SpannableString s = new SpannableString(text + "\n"); 
    s.setSpan(new LeadingMarginSpan(BulletSpan.STANDARD_GAP_WIDTH) { 
     @Override 
     public int getLeadingMargin(boolean first) { 
      return 0; 
     } 
     @Override 
     public void drawLeadingMargin(Canvas c, Paint p, int x, int dir, int top, int baseline, int bottom, CharSequence text, int start, int end, boolean first, Layout layout) { 

     } 
    }, 0, text.length(), 0); 
    allText = TextUtils.concat(allText, s); 
} 
textview.settext(allText);

来源

2015-12-04 Jon

回答与代码示例：

CharSequence allText = ""; 
for (String aBulletpoint : bulletpoint) { 
    String text = aBulletpoint.trim() + "."; 
    SpannableString spannableString = new SpannableString(text + "\n"); 
    spannableString.setSpan(new LeadingMarginSpan() { 
     @Override 
     public int getLeadingMargin(boolean first) { 
      return getString(R.string.bulletpoint).length() * 50; 
     } 
     @Override 
     public void drawLeadingMargin(Canvas c, Paint p, int x, int dir, int top, int baseline, int bottom, CharSequence text, int start, int end, boolean first, Layout layout) { 
      if (first) { 
       Paint.Style orgStyle = p.getStyle(); 
       p.setStyle(Paint.Style.FILL); 
       c.drawText(getString(R.string.bulletpoint) + " ", 0, bottom - p.descent(), p); 
       p.setStyle(orgStyle); 
      } 
     } 
    }, 0, text.length(), 0); 
    allText = TextUtils.concat(allText, spannableString); 
} 
someTextView.setText(allText);

来源

2015-12-07 12:46:42 Jon