package com.lianpos.util;

import android.text.Editable;

import android.text.TextWatcher;

import android.widget.EditText;

/**

 * Created by wangshuai on 2017/11/29 0029.

 */

public class MoneyEditText {

    public static void setPricePoint(final EditText editText) {

        editText.addTextChangedListener(new TextWatcher() {

            @Override

            public void onTextChanged(CharSequence s, int start, int before,

                                      int count) {

                if (s.toString().contains(".")) {

                    if (s.length() - 1 - s.toString().indexOf(".") > 2) {

                        s = s.toString().subSequence(0,

                                s.toString().indexOf(".") + 3);

                        editText.setText(s);

                        editText.setSelection(s.length());

                    }

                }

                if (s.toString().trim().substring(0).equals(".")) {

                    s = "0" + s;

                    editText.setText(s);

                    editText.setSelection(2);

                }

                if (s.toString().startsWith("0") && s.toString().trim().length() > 1) {

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

                        editText.setText(s.subSequence(0, 1));

                        editText.setSelection(1);

                        return;

                    }

                }

            }

            @Override

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

            }

            @Override

            public void afterTextChanged(Editable s) {

                // TODO Auto-generated method stub

            }

        });

    }

}

MoneyEditText.setPricePoint(number_unit_edit);

<EditText

            android:id="@+id/number_unit_edit"

            android:layout_width="100dp"

            android:layout_height="wrap_content"

            android:layout_alignParentRight="true"

            android:background="@null"

            android:gravity="right"

            android:hint="0.00"

            android:maxLength="7"

            android:inputType="numberDecimal"

            android:padding="15dp"

            android:textColor="#333333"

            android:textSize="16dp" />