Handle backup transport registration dynamically

Bug 11369873

Change-Id: I9bbdcc21ce25159c6645690123b5d03c553b0ddc

core/java/com/android/internal/backup/IBackupTransport.aidl

@@ -23,6 +23,12 @@ import android.os.ParcelFileDescriptor;
 
 /** {@hide} */
 interface IBackupTransport {
+    /**
+     * Ask the transport for the name under which it should be registered.  This will
+     * typically be its host service's component name, but need not be.
+     */
+    String name();
+
 	/**
 	 * Ask the transport for an Intent that can be used to launch any internal
 	 * configuration Activity that it wishes to present.  For example, the transport

core/java/com/android/internal/backup/LocalTransport.java

@@ -19,6 +19,7 @@ package com.android.internal.backup;
 import android.app.backup.BackupDataInput;
 import android.app.backup.BackupDataOutput;
 import android.app.backup.RestoreSet;
+import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageInfo;
@@ -71,6 +72,10 @@ public class LocalTransport extends IBackupTransport.Stub {
         }
     }
 
+    public String name() {
+        return new ComponentName(mContext, this.getClass()).flattenToShortString();
+    }
+
     public Intent configurationIntent() {
         // The local transport is not user-configurable
         return null;

core/java/com/android/internal/backup/LocalTransportService.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2013 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.internal.backup;
+
+import android.app.Service;
+import android.content.Intent;
+import android.os.IBinder;
+
+public class LocalTransportService extends Service {
+    private static LocalTransport sTransport = null;
+
+    @Override
+    public void onCreate() {
+        if (sTransport == null) {
+            sTransport = new LocalTransport(this);
+        }
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        return sTransport;
+    }
+}