Edittext輸入數值時做最大最小的限制如0.01到9999.99

方法比較簡單，監聽輸入的數值是否大於或小於指定的值即可，如果大於了，就給edit設置上最大的值，如果小於了就給edit設置最小的值

注意要在xml中指定inputType，不然字符串轉int或者double的時候會出現異常

/** edittext只能輸入數值的時候做最大最小的限制 */
    public static void setRegion(final EditText edit, final double MIN_MARK, final double MAX_MARK) {
        edit.addTextChangedListener(new TextWatcher() {
            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                if (start > 1) {
                    if (MIN_MARK != -1 && MAX_MARK != -1) {
                        double num = Double.parseDouble(s.toString());
                        if (num > MAX_MARK) {
                            s = String.valueOf(MAX_MARK);
                            edit.setText(s);
                        } else if (num < MIN_MARK) {
                            s = String.valueOf(MIN_MARK);
                            edit.setText(s);
                        }
                        edit.setSelection(s.length());
                    }
                }
            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            }

            @Override
            public void afterTextChanged(Editable s) {
                if (s != null && !s.equals("")) {
                    if (MIN_MARK != -1 && MAX_MARK != -1) {
                        double markVal = 0;
                        try {
                            markVal = Double.parseDouble(s.toString());
                        } catch (NumberFormatException e) {
                            markVal = 0;
                        }
                        if (markVal > MAX_MARK) {
                            edit.setText(String.valueOf(MAX_MARK));
                            edit.setSelection(String.valueOf(MAX_MARK).length());
                        }
                        return;
                    }
                }
            }
        });
    }