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
}
}
}
}
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