Android开发-Android中金额，身份证，邮箱，日期等常用判断

怼烎@ 2024-05-03 14:38 9阅读 0赞

简介：

对Android开发中，常用的输入金额判断，输入金额是否能进行提现；输入的身份证简单判断；输入是否是日期格式，输入的手机号是否符合规范等。

步骤一：布局文件

activity\_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout\_width="match\_parent"

android:layout\_height="match\_parent"

android:orientation="vertical" >

<EditText

android:id="@+id/edittext1"

android:layout\_height="wrap\_content"

android:layout\_width="match\_parent"

android:digits="0123456789."

android:inputType="number"

android:hint="只能输入金额"

<Button

android:id="@+id/button1"

android:layout\_width="wrap\_content"

android:layout\_height="wrap\_content"

android:textSize="15dp"

android:text="提现按钮\\n(输入金额要大于100可以提现)"/>

<EditText

android:id="@+id/edittext2"

android:layout\_height="wrap\_content"

android:layout\_width="match\_parent"

android:hint="只能输入电话号码"

<EditText

android:id="@+id/edittext3"

android:layout\_height="wrap\_content"

android:layout\_width="match\_parent"

android:maxLength="11"

android:inputType="number"

android:hint="只能输入手机号"

<EditText

android:id="@+id/edittext4"

android:layout\_height="wrap\_content"

android:layout\_width="match\_parent"

android:hint="只能输入邮箱"

<EditText

android:id="@+id/edittext5"

android:layout\_height="wrap\_content"

android:layout\_width="match\_parent"

android:hint="只能输入日期格式:yyyy-mm-dd"

<EditText

android:id="@+id/Card"

android:layout\_width="match\_parent"

android:layout\_height="wrap\_content"

android:digits="0123456789xX"

android:hint="请输入您的身份证号"

android:inputType="number"

android:maxLength="18"

android:numeric="integer"

android:singleLine="true" />

</LinearLayout>

步骤二：主界面 MainActivity.java

package com.huwan.checkinputdemo;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import android.app.Activity;

import android.graphics.Color;

import android.os.Bundle;

import android.text.Editable;

import android.text.TextWatcher;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

public class MainActivity extends Activity \{

@Override

protected void onCreate(Bundle savedInstanceState) \{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity\_main);

// 提现按钮

// 对按钮增加了可以是否可以点击的判断，如果输入金额错误，直接不让用户点击，也可以将金额判断是否正确做成全局参数，在提现按钮中进行判断

// 即：增加个全局的boolean money = false；然后在button1.setClickable(false)的位置上下，将金额设置属性，然后在点击的时候判断属性

final Button button1 = findViewById(R.id.button1);

//1.验证输入的是金额

final EditText edittext1 = (EditText) findViewById(R.id.edittext1);

edittext1.addTextChangedListener(new TextWatcher() \{

@Override

public void onTextChanged(CharSequence s, int start, int before, int count) \{

// 输入的是金额，不是字体变红

java.util.regex.Pattern pattern = java.util.regex.Pattern.compile("^((\[1-9\]\{1\}\\\\d\*)|(\[0\]\{1\}))(\\\\.(\\\\d)\{0,2\})?$");

java.util.regex.Matcher match = pattern.matcher(edittext1.getText().toString());

if(match.matches() == false)\{

edittext1.setTextColor(Color.parseColor("\#ff0000"));

Toast.makeText(getBaseContext(), "您输入的金额有误", Toast.LENGTH\_SHORT).show();

button1.setClickable(false);

else \{

edittext1.setTextColor(Color.parseColor("\#000000"));

button1.setClickable(true);

@Override

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

@Override

public void afterTextChanged(Editable s) \{

\});

button1.setOnClickListener(new View.OnClickListener() \{

@Override

public void onClick(View v) \{

String moneyMount = edittext1.getText().toString().trim();

Double miniMoney1 = Double.parseDouble("100.00"); // 这个100.00是最低提现金额

Double availableMoney1 = Double.parseDouble("500.00"); // 这个500.00是服务器获取的当前可提现的金额

if(!"".equals(moneyMount) //并非没有输入

&& Double.parseDouble(moneyMount) > miniMoney1 //大于最低提现金额

&& Double.parseDouble(moneyMount) <= availableMoney1 //比较他两个大小

&& !"0.00".equals(moneyMount) //输入的不是零

&& !moneyMount.toString().equals("0") //输入的不是零

&& !moneyMount.toString().startsWith("0") //不是以0开头

&& moneyMount.toString().trim().length() != 0)\{ //没有输入

Toast.makeText(getBaseContext(), "执行提现操作", Toast.LENGTH\_SHORT).show();

\}else if(moneyMount.equals(""))\{

Toast.makeText(getBaseContext(), "您还没有输入转出金额", Toast.LENGTH\_SHORT).show();

\}else if(Double.parseDouble(moneyMount) > availableMoney1)\{

Toast.makeText(getBaseContext(), "您输入转出金额大于余额", Toast.LENGTH\_SHORT).show();

\}else if(Double.parseDouble(moneyMount) < miniMoney1)\{

Toast.makeText(getBaseContext(), "最低转出金额为100.00元", Toast.LENGTH\_SHORT).show();

\}else\{

Toast.makeText(getBaseContext(), "您输入的金额错误", Toast.LENGTH\_SHORT).show();

\});

//2.验证输入的是电话号码

final EditText edittext2 = (EditText) findViewById(R.id.edittext2);

edittext2.addTextChangedListener(new TextWatcher() \{

@Override

public void onTextChanged(CharSequence s, int start, int before, int count) \{

// 输入的是电话号码，不是字体变红

//事例：0551-5565654才会显示是黑色的

String phone = "0\\\\d\{2,3\}-\\\\d\{7,8\}";

Pattern p = Pattern.compile(phone);

Matcher m = p.matcher(edittext2.getText().toString());

if(m.matches())\{

edittext2.setTextColor(Color.parseColor("\#000000"));

else \{

edittext2.setTextColor(Color.parseColor("\#ff0000"));

@Override

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

@Override

public void afterTextChanged(Editable s) \{

\});

//3.验证输入的是手机号码

final EditText edittext3 = (EditText) findViewById(R.id.edittext3);

edittext3.addTextChangedListener(new TextWatcher() \{

@Override

public void onTextChanged(CharSequence s, int start, int before, int count) \{

// 判断手机号

Pattern p = Pattern.compile("^\[1\]\[0-9\]\[0-9\]\{9\}$");

Matcher m = p.matcher(edittext3.getText().toString());

if(m.matches())\{

edittext3.setTextColor(Color.parseColor("\#000000"));

else \{

edittext3.setTextColor(Color.parseColor("\#ff0000"));

@Override

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

@Override

public void afterTextChanged(Editable s) \{

\});

//4.验证输入的是邮箱

final EditText edittext4 = (EditText) findViewById(R.id.edittext4);

edittext4.addTextChangedListener(new TextWatcher() \{

@Override

public void onTextChanged(CharSequence s, int start, int before, int count) \{

// 判断邮箱

//对于www.1257683526@foxmail.com加前面www识别不了

String str = "^(\[a-zA-Z0-9\]\*\[-\_\]?\[a-zA-Z0-9\]+)\*@(\[a-zA-Z0-9\]\*\[-\_\]?\[a-zA-Z0-9\]+)+\[\\\\.\]\[A-Za-z\]\{2,3\}(\[\\\\.\]\[A-Za-z\]\{2\})?$";

Pattern p = Pattern.compile(str);

Matcher m = p.matcher(edittext4.getText().toString());

if(m.matches())\{

edittext4.setTextColor(Color.parseColor("\#000000"));

else \{

edittext4.setTextColor(Color.parseColor("\#ff0000"));

@Override

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

@Override

public void afterTextChanged(Editable s) \{

\});

//5.验证输入的是时间格式

final EditText edittext5 = (EditText) findViewById(R.id.edittext5);

edittext5.addTextChangedListener(new TextWatcher() \{

@Override

public void onTextChanged(CharSequence s, int start, int before, int count) \{

// 5.验证输入的是时间格式

//举例：2016.08.02才是正确的

String datePattern1 = "\\\\d\{4\}-\\\\d\{2\}-\\\\d\{2\}";

String datePattern2 = "^((\\\\d\{2\}((\[02468\]\[048\])|(\[13579\]\[26\]))"

\+ "\[\\\\-\\\\/\\\\s\]?((((0?\[13578\])|(1\[02\]))\[\\\\-\\\\/\\\\s\]?((0?\[1-9\])|(\[1-2\]\[0-9\])|"

\+ "(3\[01\])))|(((0?\[469\])|(11))\[\\\\-\\\\/\\\\s\]?((0?\[1-9\])|(\[1-2\]\[0-9\])|(30)))|(0?2\[\\\\-\\\\/\\\\s\]?"

\+ "((0?\[1-9\])|(\[1-2\]\[0-9\])))))|(\\\\d\{2\}((\[02468\]\[1235679\])|(\[13579\]\[01345789\]))\[\\\\-\\\\/\\\\s\]?("

\+ "(((0?\[13578\])|(1\[02\]))\[\\\\-\\\\/\\\\s\]?((0?\[1-9\])|(\[1-2\]\[0-9\])|(3\[01\])))|(((0?\[469\])|(11))\[\\\\-\\\\/\\\\s\]?"

\+ "((0?\[1-9\])|(\[1-2\]\[0-9\])|(30)))|(0?2\[\\\\-\\\\/\\\\s\]?((0?\[1-9\])|(1\[0-9\])|(2\[0-8\]))))))";

if ((edittext5.getText().toString() != null)) \{

Pattern pattern = Pattern.compile(datePattern1);

Matcher match = pattern.matcher(edittext5.getText().toString());

if (match.matches()) \{

pattern = Pattern.compile(datePattern2);

match = pattern.matcher(edittext5.getText().toString());

edittext5.setTextColor(Color.parseColor("\#000000"));

\} else \{

edittext5.setTextColor(Color.parseColor("\#ff0000"));

\}else\{

edittext5.setTextColor(Color.parseColor("\#ff0000"));

@Override

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

@Override

public void afterTextChanged(Editable s) \{

\});

参考阅读：Android开发-Android中身份证判断是否正确

Demo样例下载：

[http://www.huwan.xin/Source/AppPackage/ZIP/Android/CheckInputDemo.rar][http_www.huwan.xin_Source_AppPackage_ZIP_Android_CheckInputDemo.rar]

更多内容请访问：[www.huwan.xin][]

[http_www.huwan.xin_Source_AppPackage_ZIP_Android_CheckInputDemo.rar]: http://www.huwan.xin/Source/AppPackage/ZIP/Android/CheckInputDemo.rar
[www.huwan.xin]: http://www.huwan.xin