NFC读取卡片ID
本人小白一枚，在基于@Android_磊子大哥的文章（原文地址）以及网上的一些大神的文章，改了一点自己需要的功能
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1.0, maximum-scale=1.0, user-scalable=no"/>
<title></title>
<script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.js"></script>
<script>
var NfcAdapter;
var NdefRecord;
var NdefMessage;
function listenNFCStatus() {
try{
var main = plus.android.runtimeMainActivity();
var Intent = plus.android.importClass('android.content.Intent');
var Activity = plus.android.importClass('android.app.Activity');
var PendingIntent = plus.android.importClass('android.app.PendingIntent');
var IntentFilter = plus.android.importClass('android.content.IntentFilter');
NfcAdapter = plus.android.importClass('android.nfc.NfcAdapter');
var nfcAdapter = NfcAdapter.getDefaultAdapter(main);
var intent = new Intent(main, main.getClass());
intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
var pendingIntent = PendingIntent.getActivity(main, 0, intent, 0);
var ndef = new IntentFilter("android.nfc.action.TECH_DISCOVERED");
ndef.addDataType("*/*");
var intentFiltersArray = [ndef];
var techListsArray = [
["android.nfc.tech.IsoDep"],
["android.nfc.tech.NfcA"],
["android.nfc.tech.NfcB"],
["android.nfc.tech.NfcF"],
["android.nfc.tech.Nfcf"],
["android.nfc.tech.NfcV"],
["android.nfc.tech.NdefFormatable"],
["android.nfc.tech.MifareClassic"],
["android.nfc.tech.MifareUltralight"]
];
document.addEventListener("newintent",
function() {
console.error('newintent');
setTimeout(handle_nfc_data1, 1000);
}, false);
document.addEventListener("pause", function(e) {
if (nfcAdapter) {
nfcAdapter.disableForegroundDispatch(main);
console.log('pause');
}
}, false);
document.addEventListener("resume", function(e) {
if (nfcAdapter) {
console.log('resume');
nfcAdapter.enableForegroundDispatch(main, pendingIntent, intentFiltersArray, techListsArray);
}
}, false);
nfcAdapter.enableForegroundDispatch(main, pendingIntent, intentFiltersArray, techListsArray);
}catch(e){
console.error(e);
}
}
function handle_nfc_data1()
{
NdefRecord = plus.android.importClass("android.nfc.NdefRecord");
NdefMessage = plus.android.importClass("android.nfc.NdefMessage");
var main = plus.android.runtimeMainActivity();
var intent = main.getIntent();
console.log("action type:" + intent.getAction());
if("android.nfc.action.TECH_DISCOVERED" == intent.getAction()){
if(readyWriteData){
__write(intent);
readyWriteData = false;
}else if(readyRead){
__read(intent);
readyRead = false;
}
}
}
function showToast(msg){
plus.nativeUI.toast(msg);
}
function __write(intent){
try{
waiting.setTitle('请勿移开标签\n正在写入...');
var text = document.getElementById('text').value;
console.log("text=" + text);
var textBytes = plus.android.invoke(text,"getBytes");
var textRecord = new NdefRecord(NdefRecord.TNF_MIME_MEDIA,
plus.android.invoke("text/plain","getBytes"), plus.android.invoke("","getBytes"), textBytes);
var message = new NdefMessage([textRecord]);
var Ndef = plus.android.importClass('android.nfc.tech.Ndef');
var NdefFormatable = plus.android.importClass('android.nfc.tech.NdefFormatable');
var tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
var ndef = Ndef.get(tag);
if (ndef != null) {
var size = message.toByteArray().length;
console.log("size=" + size);
ndef.connect();
if (!ndef.isWritable()) {
showToast("tag不允许写入");
waiting.close();
return ;
}
if (ndef.getMaxSize() < size) {
showToast("文件大小超出容量");
waiting.close();
return ;
}
ndef.writeNdefMessage(message);
waiting.close();
showToast("写入数据成功.");
return ;
} else {
var format = NdefFormatable.get(tag);
if (format != null) {
try {
format.connect();
format.format(message);
showToast("格式化tag并且写入message");
waiting.close();
return ;
} catch (e) {
showToast("格式化tag失败.");
waiting.close();
return ;
}
} else {
showToast("Tag不支持NDEF");
waiting.close();
return ;
}
}
}catch(e){
console.log("error=" + e);
waiting.close();
alert('写入失败');
}
}
function __read(intent){
try{
var content = "";
waiting.setTitle('请勿移开标签\n正在读取数据...');
var tag = plus.android.importClass("android.nfc.Tag");
tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
var bytesId = intent.getByteArrayExtra(NfcAdapter.EXTRA_ID);
console.log("bytesId:"+(bytesId));
waiting.close();
content +="卡片字节数组ID："+tag.getId()+"<br/>";
content +="卡片16进制ID："+ bytesToHexString(tag.getId())+"<br/>";
var tagid = reverseTwo(bytesToHexString(tag.getId()));
content +="卡片16进制翻转ID："+tagid+"<br/>";
content +="卡片10进制卡号："+parseInt(tagid, 16)+"<br/>";
$("#content").html(content);
}catch(e){
alert(e);
//TODO handle the exception
}
}
function bytesToHexString(inarray){
var i, j, x;
var hex = [ "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A",
"B", "C", "D", "E", "F" ];
var out = "";
for (j = 0; j < inarray.length; ++j) {
x = parseInt(inarray[j]) & 0xff;
i = (x >> 4) & 0x0f;
out += hex[i];
i = x & 0x0f;
out += hex[i];
}
return out;
}
function reverseTwo(str)
{
var str1 = "";
for(var i = 1; i <= str.length; i++){
str1 +=str[i-1];
if(i%2==0){
if(i == str.length){
break;
}
str1+=":";
}
}
var str2 = "";
for(var i = str1.split(":").length-1; i >= 0 ; i--){
str2+= str1.split(":")[i];
}
return str2;
}
document.addEventListener('plusready',listenNFCStatus,false);
var waiting ;
var readyWriteData = false;
var readyRead = false;
function writeData(){
var textEle = document.getElementById('text');
if(!textEle.value){
alert('请输入要写入的内容');
return;
}
readyWriteData = true;
waiting = plus.nativeUI.showWaiting("请将NFC标签靠近！");
}
function readData(){
readyRead = true;
waiting = plus.nativeUI.showWaiting("请将NFC标签靠近！");
}
</script>
<style>
button{
width: 50%;
height: 50px;
}
</style>
</head>
<body>
输入要写入的内容:<br/><textarea id="text">姓名:张二蛋年龄:29地址：北京海淀区</textarea><br/>
<button onclick="writeData()">写入</button>
<button style="position: absolute; bottom: 100px; right: 100px;" onclick="readData()">读取</button><br/>
读取的内容:
<div id="content"/>
</body>
</html>manifest.json 模块权限配置勾选了NFC
避免打包之后刷卡会闪退
