Backup NFC preferences.

Backs up all NFC shared preferences. Note this only works when doing a
full system restore. Doing just a runtime restore won't trigger the NFC
service to restart and reload the setting.

Bug: 3139537
Change-Id: I40d3e5c5cd39482a292e634a941af6093f639ece

2 files changed, 34 insertions, 1 deletions

diff --git a/src/com/android/nfc/NfcBackupAgent.java b/src/com/android/nfc/NfcBackupAgent.java
new file mode 100644
index 0000000..27fdf76
--- /dev/null
+++ b/src/com/android/nfc/NfcBackupAgent.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2011 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.nfc;
+
+import android.app.backup.BackupAgentHelper;
+import android.app.backup.SharedPreferencesBackupHelper;
+
+public class NfcBackupAgent extends BackupAgentHelper {
+    // Backup identifier
+    static final String SHARED_PREFS_BACKUP_KEY = "shared_prefs";
+
+    @Override
+    public void onCreate() {
+        SharedPreferencesBackupHelper helper =
+                new SharedPreferencesBackupHelper(this, NfcService.PREF);
+        addHelper(SHARED_PREFS_BACKUP_KEY, helper);
+    }
+}
+
diff --git a/src/com/android/nfc/NfcService.java b/src/com/android/nfc/NfcService.java
index e8fb79d..648455c 100755
--- a/src/com/android/nfc/NfcService.java
+++ b/src/com/android/nfc/NfcService.java
@@ -152,7 +152,7 @@ public class NfcService extends Application {
     private static final String NFCEE_ADMIN_PERM = NFC_PERM;
     private static final String NFCEE_ADMIN_PERM_ERROR = "NFCEE_ADMIN permission required";
 
-    private static final String PREF = "NfcServicePrefs";
+    /*package*/ static final String PREF = "NfcServicePrefs";
 
     private static final String PREF_NFC_ON = "nfc_on";
     private static final boolean NFC_ON_DEFAULT = true;