NFC API documentation. (2c10311a) · Commits · e / os / android_frameworks_base

core/java/android/nfc/NfcActivityManager.java

+17 −1

Original line number	Diff line number	Diff line
		@@ -299,7 +299,23 @@ public final class NfcActivityManager extends INdefPushCallback.Stub
		callback = state.uriCallback;
		}
		if (callback != null) {
		return callback.createBeamUris(mDefaultEvent);
		uris = callback.createBeamUris(mDefaultEvent);
		if (uris != null) {
		for (Uri uri : uris) {
		if (uri == null) {
		Log.e(TAG, "Uri not allowed to be null.");
		return null;
		}
		String scheme = uri.getScheme();
		if (scheme == null \|\| (!scheme.equalsIgnoreCase("file") &&
		!scheme.equalsIgnoreCase("content"))) {
		Log.e(TAG, "Uri needs to have " +
		"either scheme file or scheme content");
		return null;
		}
		}
		}
		return uris;
		} else {
		return uris;
		}

core/java/android/nfc/NfcAdapter.java

+132 −5

Original line number	Diff line number	Diff line
		@@ -584,17 +584,138 @@ public final class NfcAdapter {
		}
		}

		//TODO: make sure NFC service has permission for URI
		//TODO: see if we will eventually support multiple URIs
		//TODO: javadoc
		/**
		* Set one or more {@link Uri}s to send using Android Beam (TM). Every
		* Uri you provide must have either scheme 'file' or scheme 'content'.
		*
		* <p>For the data provided through this method, Android Beam tries to
		* switch to alternate transports such as Bluetooth to achieve a fast
		* transfer speed. Hence this method is very suitable
		* for transferring large files such as pictures or songs.
		*
		* <p>The receiving side will store the content of each Uri in
		* a file and present a notification to the user to open the file
		* with a {@link android.content.Intent} with action
		* {@link android.content.Intent#ACTION_VIEW}.
		* If multiple URIs are sent, the {@link android.content.Intent} will refer
		* to the first of the stored files.
		*
		* <p>This method may be called at any time before {@link Activity#onDestroy},
		* but the URI(s) are only made available for Android Beam when the
		* specified activity(s) are in resumed (foreground) state. The recommended
		* approach is to call this method during your Activity's
		* {@link Activity#onCreate} - see sample
		* code below. This method does not immediately perform any I/O or blocking work,
		* so is safe to call on your main thread.
		*
		* <p>{@link #setBeamPushUris} and {@link #setBeamPushUrisCallback}
		* have priority over both {@link #setNdefPushMessage} and
		* {@link #setNdefPushMessageCallback}.
		*
		* <p>If {@link #setBeamPushUris} is called with a null Uri array,
		* and/or {@link #setBeamPushUrisCallback} is called with a null callback,
		* then the Uri push will be completely disabled for the specified activity(s).
		*
		* <p>Code example:
		* <pre>
		* protected void onCreate(Bundle savedInstanceState) {
		* super.onCreate(savedInstanceState);
		* NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(this);
		* if (nfcAdapter == null) return; // NFC not available on this device
		* nfcAdapter.setBeamPushUris(new Uri[] {uri1, uri2}, this);
		* }
		* </pre>
		* And that is it. Only one call per activity is necessary. The Android
		* OS will automatically release its references to the Uri(s) and the
		* Activity object when it is destroyed if you follow this pattern.
		*
		* <p>If your Activity wants to dynamically supply Uri(s),
		* then set a callback using {@link #setBeamPushUrisCallback} instead
		* of using this method.
		*
		* <p class="note">Do not pass in an Activity that has already been through
		* {@link Activity#onDestroy}. This is guaranteed if you call this API
		* during {@link Activity#onCreate}.
		*
		* <p class="note">Requires the {@link android.Manifest.permission#NFC} permission.
		*
		* @param uris an array of Uri(s) to push over Android Beam
		* @param activity activity for which the Uri(s) will be pushed
		*/
		public void setBeamPushUris(Uri[] uris, Activity activity) {
		if (activity == null) {
		throw new NullPointerException("activity cannot be null");
		}
		if (uris != null) {
		for (Uri uri : uris) {
		if (uri == null) throw new NullPointerException("Uri not " +
		"allowed to be null");
		String scheme = uri.getScheme();
		if (scheme == null \|\| (!scheme.equalsIgnoreCase("file") &&
		!scheme.equalsIgnoreCase("content"))) {
		throw new IllegalArgumentException("URI needs to have " +
		"either scheme file or scheme content");
		}
		}
		}
		mNfcActivityManager.setNdefPushContentUri(activity, uris);
		}

		// TODO javadoc
		/**
		* Set a callback that will dynamically generate one or more {@link Uri}s
		* to send using Android Beam (TM). Every Uri the callback provides
		* must have either scheme 'file' or scheme 'content'.
		*
		* <p>For the data provided through this callback, Android Beam tries to
		* switch to alternate transports such as Bluetooth to achieve a fast
		* transfer speed. Hence this method is very suitable
		* for transferring large files such as pictures or songs.
		*
		* <p>The receiving side will store the content of each Uri in
		* a file and present a notification to the user to open the file
		* with a {@link android.content.Intent} with action
		* {@link android.content.Intent#ACTION_VIEW}.
		* If multiple URIs are sent, the {@link android.content.Intent} will refer
		* to the first of the stored files.
		*
		* <p>This method may be called at any time before {@link Activity#onDestroy},
		* but the URI(s) are only made available for Android Beam when the
		* specified activity(s) are in resumed (foreground) state. The recommended
		* approach is to call this method during your Activity's
		* {@link Activity#onCreate} - see sample
		* code below. This method does not immediately perform any I/O or blocking work,
		* so is safe to call on your main thread.
		*
		* <p>{@link #setBeamPushUris} and {@link #setBeamPushUrisCallback}
		* have priority over both {@link #setNdefPushMessage} and
		* {@link #setNdefPushMessageCallback}.
		*
		* <p>If {@link #setBeamPushUris} is called with a null Uri array,
		* and/or {@link #setBeamPushUrisCallback} is called with a null callback,
		* then the Uri push will be completely disabled for the specified activity(s).
		*
		* <p>Code example:
		* <pre>
		* protected void onCreate(Bundle savedInstanceState) {
		* super.onCreate(savedInstanceState);
		* NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(this);
		* if (nfcAdapter == null) return; // NFC not available on this device
		* nfcAdapter.setBeamPushUrisCallback(callback, this);
		* }
		* </pre>
		* And that is it. Only one call per activity is necessary. The Android
		* OS will automatically release its references to the Uri(s) and the
		* Activity object when it is destroyed if you follow this pattern.
		*
		* <p class="note">Do not pass in an Activity that has already been through
		* {@link Activity#onDestroy}. This is guaranteed if you call this API
		* during {@link Activity#onCreate}.
		*
		* <p class="note">Requires the {@link android.Manifest.permission#NFC} permission.
		*
		* @param callback callback, or null to disable
		* @param activity activity for which the Uri(s) will be pushed
		*/
		public void setBeamPushUrisCallback(CreateBeamUrisCallback callback, Activity activity) {
		if (activity == null) {
		throw new NullPointerException("activity cannot be null");
		@@ -663,6 +784,10 @@ public final class NfcAdapter {
		* {@link Activity#onDestroy}. This is guaranteed if you call this API
		* during {@link Activity#onCreate}.
		*
		* <p class="note">For sending large content such as pictures and songs,
		* consider using {@link #setBeamPushUris}, which switches to alternate transports
		* such as Bluetooth to achieve a fast transfer rate.
		*
		* <p class="note">Requires the {@link android.Manifest.permission#NFC} permission.
		*
		* @param message NDEF message to push over NFC, or null to disable
		@@ -753,7 +878,9 @@ public final class NfcAdapter {
		* <p class="note">Do not pass in an Activity that has already been through
		* {@link Activity#onDestroy}. This is guaranteed if you call this API
		* during {@link Activity#onCreate}.
		*
		* <p class="note">For sending large content such as pictures and songs,
		* consider using {@link #setBeamPushUris}, which switches to alternate transports
		* such as Bluetooth to achieve a fast transfer rate.
		* <p class="note">Requires the {@link android.Manifest.permission#NFC} permission.
		*
		* @param callback callback, or null to disable