Android编程实现TextView部分颜色变动的方法

本文实例讲述了android编程实现textview部分颜色变动的方法。分享给大家供大家参考，具体如下：

public class stringhandleexampleactivity extends activity {
  /** called when the activity is first created. */
  private textview textview;
  private string tempstr = "abcd12我的中古zx9yu5!f3,,";
  private stringbuffer sb;
  private list<integer> list;
  @override
  public void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.main);
    sb = new stringbuffer();
    list = new arraylist<integer>();
    textview = (textview) findviewbyid(r.id.textview);
    for (int i = 0; i < tempstr.length(); i++) {
      if (matcherreg(string.valueof(tempstr.charat(i)))) {
        list.add(i);
      }
    }
    spannablestringbuilder style=new spannablestringbuilder(tempstr);
    for (int i = 0; i < list.size(); i++) {
      system.out.println(list.get(i)+", ");
//      style.setspan(new backgroundcolorspan(color.red),list.get(i),list.get(i)+1,spannable.span_exclusive_inclusive);   //设置指定位置textview的背景颜色 
      style.setspan(new foregroundcolorspan(color.red),list.get(i),list.get(i)+1,spannable.span_exclusive_inclusive);   //设置指定位置文字的颜色 
    }
    textview.settext(style); 
  }
  private boolean matcherreg(charsequence c){
    string regex="[^0-9]";  
    pattern p = pattern.compile(regex);  
    matcher m = p.matcher(c.tostring());  
    if (m.matches()) {
      return false;
    }
    return true;
  }
}

希望本文所述对大家android程序设计有所帮助。