//为按钮添加图片和文字的方法
public Spanned getSpan(int id, String s) {
 ImageGetter imgGetter = new Html.ImageGetter() {
  @Override
  public Drawable getDrawable(String source) {
  // TODO Auto-generated method stub
  Drawable drawable = null;
  drawable = MainActivity.this.getResources().getDrawable(
   Integer.parseInt(source));
  drawable.setBounds(0, 0, drawable.getIntrinsicWidth(),
   drawable.getIntrinsicHeight());
  return drawable;
  }
 };
 StringBuffer sb = new StringBuffer();
 sb.append("<img src=\"").append(id).append("\"/>")
  .append("       ").append("<font>" + s + "</font>");
 ;
 Spanned span = Html.fromHtml(sb.toString(), imgGetter, null);
 return span;
}

button=(Button)findViewById(R.id.button);
button.setText(getSpan(R.drawable.button_iv,"按钮"));