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我試圖使用來自galaxy nexus(運行4.2.1)的setBeamPushUrisCallback到nexus7(運行4.2)的內容提供者uri。無論是設備安裝該應用,但NFC切換期間的傳輸失敗到藍牙,我得到的例外是:Android Beam ContentProvider Uri失敗
02-10 13:33:32.762: D/BluetoothOppUtility(23916): closeSendFileInfo: uri=content://com.android.beam.Beam/msgs/2
02-10 13:33:32.762: W/dalvikvm(23916): threadid=21: thread exiting with uncaught exception (group=0x40d70930)
02-10 13:33:32.770: E/AndroidRuntime(23916): FATAL EXCEPTION: Bluetooth Share Service
02-10 13:33:32.770: E/AndroidRuntime(23916): java.lang.NullPointerException
02-10 13:33:32.770: E/AndroidRuntime(23916): at com.android.bluetooth.opp.BluetoothOppUtility.closeSendFileInfo(BluetoothOppUtility.java:327)
02-10 13:33:32.770: E/AndroidRuntime(23916): at com.android.bluetooth.opp.BluetoothOppService.insertShare(BluetoothOppService.java:614)
02-10 13:33:32.770: E/AndroidRuntime(23916): at com.android.bluetooth.opp.BluetoothOppService.access$1800(BluetoothOppService.java:69)
02-10 13:33:32.770: E/AndroidRuntime(23916): at com.android.bluetooth.opp.BluetoothOppService$UpdateThread.run(BluetoothOppService.java:472)
02-10 13:33:32.941: E/NfcHandover(693): Handover transfer failed
我宣佈我的清單提供者(我可以查詢URI只是罰款我應用程序),並添加意圖過濾器,以便在梁成功時啓動該活動。我究竟做錯了什麼?爲什麼切換到藍牙總是不是wifi?
更新:
這裏是從應用程序相關的代碼:
活性實現CreateBeamUrisCallback和在OnCreate:
mNfcAdapter = NfcAdapter.getDefaultAdapter(this);
if (mNfcAdapter == null) return; // NFC not available on this device
mNfcAdapter.setBeamPushUrisCallback(this, this);
和重寫的方法:
@Override
public Uri[] createBeamUris(NfcEvent event) {
Uri uri = Uri.parse("content://com.android.beam.Beam/msgs/2");
return new Uri[]{uri};
}
清單:
<provider
android:name="com.example.android.beam.BeamContentProvider"
android:authorities="com.android.beam.Beam"
android:exported="true"/>
<activity android:name="com.example.android.beam.Beam"
android:label="@string/app_name"
android:launchMode="singleTop">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<action android:name="android.intent.action.EDIT" />
<action android:name="android.intent.action.PICK" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="vnd.android.cursor.item/vnd.com.example.msgs" />
</intent-filter>
</activity>
你能否展示你的應用的一些相關代碼? (Android Beam始終使用藍牙,目前不支持WiFi,這與三星S-Beam相反,三星S-Beam始終使用WiFi Direct,但僅適用於最新的Samsung NFC設備。) – 2013-02-11 15:18:15
感謝您的澄清!我用一段代碼更新了我的問題。 – 2013-02-11 15:49:13