android edittext 限制小數點后最多只能輸入兩位數字

 

    android:inputType="numberDecimal"

 

private InputFilter lengthFilter = new InputFilter() {
    @Override
    public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
        // source:當前輸入的字符
        // start:輸入字符的開始位置
        // end:輸入字符的結束位置
        // dest：當前已顯示的內容
        // dstart:當前光標開始位置
        // dent:當前光標結束位置
        LogUtil.i("", "source=" + source + ",start=" + start + ",end=" + end + ",dest=" + dest.toString() + ",dstart=" + dstart + ",dend=" + dend);
        if (dest.length() == 0 && source.equals(".")) {
            return "0.";
        }
        String dValue = dest.toString();
        String[] splitArray = dValue.split("\\.");
        if (splitArray.length > 1) {
            String dotValue = splitArray[1];
            if (dotValue.length() == 2) {//輸入框小數的位數
                return "";
            }
        }
        return null;
    }
};

edit.setFilters(new InputFilter[]{lengthFilter});

class   MyInputFilter implements InputFilter{
   public MyInputFilter(int dotLength) {
      this.dotLength = dotLength;
   }

   int   dotLength ;

   @Override
   public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
      // source:當前輸入的字符
      // start:輸入字符的開始位置
      // end:輸入字符的結束位置
      // dest：當前已顯示的內容
      // dstart:當前光標開始位置
      // dent:當前光標結束位置
      LogUtil.i("", "source=" + source + ",start=" + start + ",end=" + end + ",dest=" + dest.toString() + ",dstart=" + dstart + ",dend=" + dend);
      if (dest.length() == 0 && source.equals(".")) {
         return "0.";
      }
      String dValue = dest.toString();
      String[] splitArray = dValue.split("\\.");
      if (splitArray.length > 1) {
         String dotValue = splitArray[1];
         if (dotValue.length() == dotLength) {//輸入框小數的位數
            return "";
         }
      }
      return null;
   }
}