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;

    }

}