Merge "Add tag availability checking mechanism" (dda72399) · Commits · e / os / android_frameworks_base

core/java/android/nfc/INfcTag.aidl

+3 −0

Original line number	Diff line number	Diff line
		@@ -45,4 +45,7 @@ interface INfcTag
		boolean canMakeReadOnly(int ndefType);
		int getMaxTransceiveLength(int technology);
		boolean getExtendedLengthApdusSupported();

		void setTagUpToDate(long cookie);
		boolean isTagUpToDate(long cookie);
		}

+21 −0

Original line number	Diff line number	Diff line
		@@ -34,6 +34,7 @@ import android.os.Bundle;
		import android.os.Parcel;
		import android.os.Parcelable;
		import android.os.RemoteException;
		import android.os.SystemClock;

		import java.io.IOException;
		import java.util.Arrays;
		@@ -121,6 +122,7 @@ public final class Tag implements Parcelable {
		final INfcTag mTagService; // interface to NFC service, will be null if mock tag

		int mConnectedTechnology;
		long mCookie;

		/**
		* Hidden constructor to be used by NFC service and internal classes.
		@@ -140,6 +142,13 @@ public final class Tag implements Parcelable {
		mTagService = tagService;

		mConnectedTechnology = -1;

		try {
		mCookie = SystemClock.elapsedRealtime();
		tagService.setTagUpToDate(mCookie);
		} catch (RemoteException e) {
		throw e.rethrowAsRuntimeException();
		}
		}

		/**
		@@ -361,6 +370,18 @@ public final class Tag implements Parcelable {
		/** @hide */
		@UnsupportedAppUsage
		public INfcTag getTagService() {
		try {
		if (!mTagService.isTagUpToDate(mCookie)) {
		String id_str = "";
		for (int i = 0; i < mId.length; i++) {
		id_str = id_str + String.format("%02X ", mId[i]);
		}
		String msg = "Permission Denial: Tag ( ID: " + id_str + ") is out of date";
		throw new SecurityException(msg);
		}
		} catch (RemoteException e) {
		throw e.rethrowAsRuntimeException();
		}
		return mTagService;
		}