php生成Android客戶(hù)端掃描可登錄的二維碼,android客戶(hù)端_PHP教程
Jul 12, 2016 am 08:51 AMphp生成Android客戶(hù)端掃描可登錄的二維碼,android客戶(hù)端
本文實(shí)例為大家分享了php網(wǎng)頁(yè)生成二維碼,Android客戶(hù)端掃描登錄的具體代碼,供大家參考,具體內(nèi)容如下
使用了Github上具有掃碼功能的ZXing開(kāi)源庫(kù),使用了通過(guò)隨機(jī)數(shù)生成二維碼圖片網(wǎng)絡(luò)API,整個(gè)過(guò)程經(jīng)過(guò)三步:
1.PHP網(wǎng)頁(yè)生成二維碼,相應(yīng)隨機(jī)數(shù)存儲(chǔ)到數(shù)據(jù)庫(kù)中;
2.Android客戶(hù)端掃碼,攜帶username保存至隨機(jī)數(shù)對(duì)應(yīng)的位置;
3.每隔一段時(shí)間,PHP通過(guò)Ajax輪詢(xún)數(shù)據(jù)庫(kù),判斷是否為空,不為空則跳轉(zhuǎn)網(wǎng)頁(yè)。
具體代碼:
1. 通過(guò)隨機(jī)數(shù)生成二維碼圖片,并執(zhí)行輪詢(xún)操作命令的主頁(yè)面????
<html> <head> <title>qrlogin</title> <meta charset="UTF-8"/> </head> <body> <?php /** * @author Cenquanyu * @version 2016年5月12日 * */ require 'mysql_connect.php'; $randnumber = ""; for($i=0;$i<8;$i++){ $randnumber.=rand(0,9); } //將生成的隨機(jī)數(shù)保存至數(shù)據(jù)庫(kù) mysql_query("insert into login_data (randnumber) values ('$randnumber')") ?> <img src="http://qr.liantu.com/api.php?text=<?php echo $randnumber;? alt="php生成Android客戶(hù)端掃描可登錄的二維碼,android客戶(hù)端_PHP教程" >" width="300px"/> <input hidden="hidden" type="text" name="randnumber" id="randnumber"value="<?php echo $randnumber;?>"/> </body> <script> xmlHttpRequest.onreadystatechange = function(){ if(xmlHttpRequest.status == 200 && xmlHttpRequest.readyState ==4){ result = xmlHttp.responseText; if(result==true){//username不為空則跳轉(zhuǎn)頁(yè)面 window.location.href='welcome.php'; } } } } function polling(){ //執(zhí)行輪詢(xún)操作 var xmlHttpRequest; if(window.XMLHttpRequest){ xmlHttpRequest = new XMLHttpRequest(); } else{ xmlHttpRequest = new ActiveXObject("Microsoft.XMLHTTP"); } randnumber = document.getElementById('randnumber').value; xmlHttpRequest.open("GET","polling.php?randnumber="+ randnumber,true); xmlHttpRequest.send(); } setInterval("polling()",1000); </script> </html>
2. 數(shù)據(jù)庫(kù)連接頁(yè)面
<?php /** * 數(shù)據(jù)庫(kù)連接文件 * @author Cenquanyu * @version 2016年5月12日 * */ $con = mysql_connect("localhost","root","") or die(mysql_error()); mysql_select_db("qr_login"); ?>
3.執(zhí)行輪詢(xún)操作的頁(yè)面,username不為空則跳轉(zhuǎn)
<?php /** * @author Cenquanyu * @version 2016年5月12日 * 執(zhí)行輪詢(xún)操作,查詢(xún)隨機(jī)數(shù)在數(shù)據(jù)庫(kù)中的相應(yīng)位置的username字段為不為空 * 為空,則返回false,頁(yè)面不跳轉(zhuǎn) * 不為空,則說(shuō)明有用戶(hù)進(jìn)行了該二維碼的掃碼登錄,頁(yè)面進(jìn)行跳轉(zhuǎn) */ require 'mysql_connect.php'; $randnumber = $_GET['randnumber']; $result = mysql_query("select * from login_data where randnumber='$randnumber'"); $row = mysql_fetch_array($result); if($row['username']!="") echo "true"; else echo "false"; ?>
4.自定義的API,對(duì)客戶(hù)端的username進(jìn)行保存
<?php /** * @author Cenquanyu * @version 2016年5月12日 * 自定義API用于Android客戶(hù)端掃碼登錄,將客戶(hù)端的username保存至二維碼對(duì)應(yīng)的隨機(jī)數(shù)在數(shù)據(jù)庫(kù)中的相應(yīng)位置。 * 參數(shù):username,randnumber * 無(wú)返回值 */ $randnumber = $_GET('randnumber'); $username = $_GET('username'); require 'mysql_connect.php'; mysql_query("update qr_login set username='$username' where randnumber= '$randnumber'"); ?>
5. Android客戶(hù)端執(zhí)行掃碼操作的Activity
package com.Cenquanyu.qrlogin; import com.Cenquanyu.qrlogin.R; import com.zxing.activity.CaptureActivity; import android.app.Activity; import android.content.Intent; import android.graphics.Paint.Cap; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; /** * @author Cenquanyu * @version 2016年5月12日 * */ public class MainActivity extends Activity implements OnClickListener { private Button btnScan; private EditText etUsername; private static final String WEB_URL = "http://172.31.19.202/QRLogin/";//改成PC端相應(yīng)地址 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btnScan = (Button) findViewById(R.id.btnScan); btnScan.setOnClickListener(this); etUsername = (EditText) findViewById(R.id.etUsername); } @Override public void onClick(View v) { // 掃碼操作 Intent intent = new Intent(this, CaptureActivity.class); startActivityForResult(intent, 0);//返回結(jié)果 } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (resultCode == Activity.RESULT_OK) { String randnumber = data.getExtras().getString("result");//客戶(hù)端掃碼后返回掃描結(jié)果,將二維碼對(duì)應(yīng)的隨機(jī)數(shù)取出 String username = etUsername.getText().toString(); String url = WEB_URL + "saveUsername.php?randnumber=" + randnumber + "&username=" + username; HttpUtils.login(url);//訪(fǎng)問(wèn)url } } }
6. 網(wǎng)絡(luò)請(qǐng)求類(lèi)
package com.Cenquanyu.qrlogin; import java.io.IOException; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; public class HttpUtils{ public static void login(final String url){ new Thread(new Runnable() { @Override public void run() { HttpURLConnection connection; try { connection = (HttpURLConnection) new URL(url).openConnection(); connection.setRequestMethod("GET"); connection.getInputStream(); } catch (Exception e) { e.printStackTrace(); } } }).start(); } }
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