android实现输入框限制小数点2位

调用部分：

edittext.addTextChangedListener(new TextWatcher() {

@Override

    public void beforeTextChanged(CharSequence charSequence,int i,int i1,int i2) {}

@Override

    public void onTextChanged(CharSequence charSequence,int i,int i1,int i2) {

EidtTextInputUtil.limitInputPointPlaces(etMoney, charSequence,2);

EidtTextInputUtil.limitInputAddStratOneZero(etMoney, charSequence);

EidtTextInputUtil.limitInputClearStartMultiZero(etMoney, charSequence);

showGiveMoney();

}

@Override

    public void afterTextChanged(Editable editable) {}

});

核心代码部分（EidtTextInputUtil）：

public class EidtTextInputUtil {

//限制eidttext输入浮动数据步骤1：消除小数点后超过两位的字符​

    public static void limitInputPointPlaces(EditText editText, CharSequence charSequence,int pointPlaces){

String inputStr = charSequence.toString().trim();

if (inputStr.contains(".")) {

if ((inputStr.length() -1) - inputStr.indexOf(".") > pointPlaces) {

charSequence = inputStr.subSequence(0,  inputStr.indexOf(".") + (pointPlaces +1));

editText.setText(charSequence);

editText.setSelection(charSequence.length());//光标移到最后

            }

}

}

//限制eidttext输入浮动数据步骤2：输入的第一个字符为小数点时，自动在小数点前面不一个零

    public static void limitInputAddStratOneZero(EditText editText, CharSequence charSequence){

String inputStr = charSequence.toString().trim();

if (inputStr.substring(0).equals(".")) {

charSequence ="0" + inputStr;

editText.setText(charSequence);

editText.setSelection(charSequence.length());//光标移到最后

        }

}

//限制eidttext输入浮动数据步骤3：如果输入的第一个为0，且第二位跟的不是".",则无法后续输入

    public static void limitInputClearStartMultiZero(EditText editText, CharSequence charSequence){

String inputStr = charSequence.toString().trim();

if (inputStr.startsWith("0") && inputStr.length() >1) {

if (!inputStr.substring(1,2).equals(".")) {

charSequence = inputStr.subSequence(0,1);

editText.setText(charSequence);

editText.setSelection(charSequence.length());//光标移到最后

            }

}

}

}