不同技术的过滤条件的定义

@echo off
set /a num1=0,num2=0
set "str=%cd%"
:loop
set /a num1+=1
if "%str:~0,1%"=="\" set /a num2+=1
set "str=%str:~1%"
if defined str goto loop

echo 当前路径为："%cd:"=%"
echo 共计 %num1% 个字符，其中字符"\"有 %num2% 个
for %%i in ("%cd%") do echo 当前目录名为："%%~nxi"
pause

 

 

 

 

 在 menifest中定义

 

        

 <intent-filter>

                <action android:name="android.nfc.action.TAG_DISCOVERED" />

                <category android:name="android.intent.category.DEFAULT" />

            </intent-filter>

      <meta-data

                android:name="android.nfc.action.TECH_DISCOVERED"

                android:resource="@xml/nfc_tech_filter" />

 

 

在xml中定义

<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">

    <tech-list>

        <tech>android.nfc.tech.MifareUltralight</tech>

        <tech>android.nfc.tech.Ndef</tech>

        <tech>android.nfc.tech.NfcA</tech>

    </tech-list>

    <tech-list>

        <tech>android.nfc.tech.MifareClassic</tech>

        <tech>android.nfc.tech.Ndef</tech>

        <tech>android.nfc.tech.NfcA</tech>

    </tech-list>

   

     <tech-list> 

       <tech>android.nfc.tech.IsoDep</tech>

       <tech>android.nfc.tech.NfcA</tech>

       <tech>android.nfc.tech.NfcB</tech>

       <tech>android.nfc.tech.NfcF</tech>

    </tech-list>

 </resources>

 

MifareUltralight，MifareClassic，IsoDep不同时并存，所以要分开写。