Samsung Nexus S vs HTC - NFC Intent Filter + AAR

问题

I save the AAR on my NFC-Tag. If I scan the TAG with the Nexus S (Android 4.1.1), i get the NfcAdapter.ACTION_NDEF_DISCOVERED and the NFCReaderActivity directly starts.

If I do the same with the HTC X (Android 4.0.3), the application starts but I just get the android.intent.action.MAIN and so the NFCReaderActivity doesn't show up and the Tag isn't scanned.

This works on Samsung Nexus S but not on HTC:

<activity android:name=".activities.NFCWriterActivity"></activity>
<activity android:name=".activities.NFCReaderActivity">
        <intent-filter>
          <action android:name="android.nfc.action.NDEF_DISCOVERED"/>
          <category android:name="android.intent.category.DEFAULT"/>
        </intent-filter>              
</activity>
<activity android:name=".activities.NFCBeamActivity">        
</activity>
<activity android:name=".activities.WifiManagerActivity"></activity>
<activity android:name=".activities.WifiConfiguratorActivity"></activity>
<activity android:name=".activities.TagWriterOptionsActivity"></activity>
<activity android:name=".activities.WifiScannerTagActivity"></activity>
<activity android:name=".activities.WifiScannerActivity"></activity>  
<activity android:name=".activities.WifiListActivity">

</activity>

This are my activities and filters.

Someone an idea?

Edit:

This works on HTC but not on Samsung Nexus S:

<activity android:name=".activities.NFCWriterActivity"></activity>
<activity android:name=".activities.NFCReaderActivity">
        <intent-filter>
          <action android:name="android.nfc.action.NDEF_DISCOVERED"/>
          <category android:name="android.intent.category.DEFAULT"/>
          <data android:mimeType="application/vnd.wfa.wsc" />
        </intent-filter>              
</activity>
<activity android:name=".activities.NFCBeamActivity">    

</activity>
<activity android:name=".activities.WifiManagerActivity"></activity>
<activity android:name=".activities.WifiConfiguratorActivity"></activity>
<activity android:name=".activities.TagWriterOptionsActivity"></activity>
<activity android:name=".activities.WifiScannerTagActivity"></activity>
<activity android:name=".activities.WifiScannerActivity"></activity>  
<activity android:name=".activities.WifiListActivity"></activity>

Here I got the following Exception @ HTC - maybe this is the Problem i don'tknow: Stack:

D/AudioTrack( 3938): stop 0x1601940
D/AudioFlinger(  142): releasing 231 from 3938
D/AudioTrack( 3938): AudioTrack destructor X
D/power   (  277): Already locked performance.
W/CpuWake (  277): >>acquireCpuPerfWakeLock!
W/CpuWake (  277): <<acquireCpuPerfWakeLock!
E/ActivityManager(  277): startLaunchActivity get appname failed
E/ActivityManager(  277): java.lang.NullPointerException
E/ActivityManager(  277):   at com.android.server.am.ActivityStack.startLaunchActivity(ActivityStack.java:4831)
E/ActivityManager(  277):   at com.android.server.am.ActivityStack.startActivityMayWait(ActivityStack.java:3352)
E/ActivityManager(  277):   at com.android.server.am.ActivityManagerService.startActivity(ActivityManagerService.java:2509)
E/ActivityManager(  277):   at android.app.ActivityManagerNative.onTransact(ActivityManagerNative.java:131)
E/ActivityManager(  277):   at com.android.server.am.ActivityManagerService.onTransact(ActivityManagerService.java:1751)
E/ActivityManager(  277):   at android.os.Binder.execTransact(Binder.java:338)
E/ActivityManager(  277):   at dalvik.system.NativeStart.run(Native Method)
I/ActivityManager(  277): START {act=android.nfc.action.NDEF_DISCOVERED typ=application/vnd.wfa.wsc pkg=at.nfc.wifi (has extras)} from pid 3938
W/ActivityManager(  277): Duplicate finish request for ActivityRecord{41163a90 com.android.nfc/.NfcRootActivity}
D/power   (  277): Already locked performance.
I/Intent  (  277): @test_code: getHtcIntentFlag: 0 obj: 1094379848
W/CpuWake (  277): >>acquireCpuPerfWakeLock!
W/CpuWake (  277): <<acquireCpuPerfWakeLock!

Maybe the Problem is the version 4.1.1 vs 4.0.3 - I don't know: Fact is: Only Ndef works on Samsung, If i add the

回答1:

There is a bug in Android that makes AAR basically worthless. Depending on the phone state, either the AAR or the intent filter is taking precedence when the NFC service is handling the tag. If the AAR wins, you have no means of obtaining the tag.

The only way you can handle this properly is to remove the AAR, replacing it with a URL to a server you control, that can redirect to your app page on Google Play.

来源：https://stackoverflow.com/questions/12695967/samsung-nexus-s-vs-htc-nfc-intent-filter-aar

标签

android

nfc

intentfilter

ndef

android-applicationrecord