extend svc command to control NFC state

Change-Id: I599e4000fa17384089410e63b3150f25aa9458f7

cmds/svc/src/com/android/commands/svc/NfcCommand.java

@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.commands.svc;
+
+import android.content.Context;
+import android.content.pm.IPackageManager;
+import android.content.pm.PackageManager;
+import android.nfc.INfcAdapter;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+
+public class NfcCommand extends Svc.Command {
+
+    public NfcCommand() {
+        super("nfc");
+    }
+
+    @Override
+    public String shortHelp() {
+        return "Control NFC functions";
+    }
+
+    @Override
+    public String longHelp() {
+        return shortHelp() + "\n"
+                + "\n"
+                + "usage: svc nfc [enable|disable]\n"
+                + "         Turn NFC on or off.\n\n";
+    }
+
+    @Override
+    public void run(String[] args) {
+        boolean validCommand = false;
+        if (args.length >= 2) {
+            boolean flag = false;
+            if ("enable".equals(args[1])) {
+                flag = true;
+                validCommand = true;
+            } else if ("disable".equals(args[1])) {
+                flag = false;
+                validCommand = true;
+            }
+            if (validCommand) {
+                IPackageManager pm = IPackageManager.Stub.asInterface(
+                        ServiceManager.getService("package"));
+                try {
+                    if (pm.hasSystemFeature(PackageManager.FEATURE_NFC)) {
+                        INfcAdapter nfc = INfcAdapter.Stub
+                                .asInterface(ServiceManager.getService(Context.NFC_SERVICE));
+                        try {
+                            if (flag) {
+                                nfc.enable();
+                            } else
+                                nfc.disable(true);
+                        } catch (RemoteException e) {
+                            System.err.println("NFC operation failed: " + e);
+                        }
+                    } else {
+                        System.err.println("NFC feature not supported.");
+                    }
+                } catch (RemoteException e) {
+                    System.err.println("RemoteException while calling PackageManager, is the "
+                            + "system running?");
+                }
+                return;
+            }
+        }
+        System.err.println(longHelp());
+    }
+
+}

cmds/svc/src/com/android/commands/svc/Svc.java

@@ -95,6 +95,7 @@ public class Svc {
             new PowerCommand(),
             new DataCommand(),
             new WifiCommand(),
-            new UsbCommand()
+            new UsbCommand(),
+            new NfcCommand(),
     };
 }