Prevent use of NFC api if device is not featurized for NFC. (fdf9086e) · Commits · e / os / android_frameworks_base

core/java/android/nfc/NfcAdapter.java

+31 −1

Original line number	Diff line number	Diff line
		@@ -15,7 +15,10 @@ import java.lang.UnsupportedOperationException;

		import android.annotation.SdkConstant;
		import android.annotation.SdkConstant.SdkConstantType;
		import android.app.ActivityThread;
		import android.content.Context;
		import android.content.pm.IPackageManager;
		import android.content.pm.PackageManager;
		import android.nfc.INfcAdapter;
		import android.os.IBinder;
		import android.os.RemoteException;
		@@ -151,6 +154,26 @@ public final class NfcAdapter {
		mService = service;
		}

		/**
		* Helper to check if this device has FEATURE_NFC, but without using
		* a context.
		* Equivalent to
		* context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_NFC)
		*/
		private static boolean hasNfcFeature() {
		IPackageManager pm = ActivityThread.getPackageManager();
		if (pm == null) {
		Log.e(TAG, "Cannot get package manager, assuming no NFC feature");
		return false;
		}
		try {
		return pm.hasSystemFeature(PackageManager.FEATURE_NFC);
		} catch (RemoteException e) {
		Log.e(TAG, "Package manager query failed, assuming no NFC feature", e);
		return false;
		}
		}

		/**
		* Get a handle to the default NFC Adapter on this Android device.
		* <p>
		@@ -165,9 +188,16 @@ public final class NfcAdapter {
		}
		sIsInitialized = true;

		/* is this device meant to have NFC */
		if (!hasNfcFeature()) {
		Log.v(TAG, "this device does not have NFC support");
		return null;
		}

		/* get a handle to NFC service */
		IBinder b = ServiceManager.getService("nfc");
		if (b == null) {
		Log.d(TAG, "NFC Service not available");
		Log.e(TAG, "could not retrieve NFC service");
		return null;
		}