Force poll on data usage launch.

When lauching data usage, force NetworkStatsService poll to update
with recent data.  Also move UID summary data to Loader pattern.

Bug: 4515856
Change-Id: Ia8c70d8d0c863da3b8e956e4066d4f69fba30473

src/com/android/settings/net/SummaryForAllUidLoader.java

@@ -0,0 +1,80 @@
+/*
+ * 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.settings.net;
+
+import android.content.AsyncTaskLoader;
+import android.content.Context;
+import android.net.INetworkStatsService;
+import android.net.NetworkStats;
+import android.net.NetworkTemplate;
+import android.os.Bundle;
+import android.os.RemoteException;
+
+public class SummaryForAllUidLoader extends AsyncTaskLoader<NetworkStats> {
+    private static final String KEY_TEMPLATE = "template";
+    private static final String KEY_START = "start";
+    private static final String KEY_END = "end";
+
+    private final INetworkStatsService mStatsService;
+    private final Bundle mArgs;
+
+    public static Bundle buildArgs(NetworkTemplate template, long start, long end) {
+        final Bundle args = new Bundle();
+        args.putParcelable(KEY_TEMPLATE, template);
+        args.putLong(KEY_START, start);
+        args.putLong(KEY_END, end);
+        return args;
+    }
+
+    public SummaryForAllUidLoader(
+            Context context, INetworkStatsService statsService, Bundle args) {
+        super(context);
+        mStatsService = statsService;
+        mArgs = args;
+    }
+
+    @Override
+    protected void onStartLoading() {
+        super.onStartLoading();
+        forceLoad();
+    }
+
+    @Override
+    public NetworkStats loadInBackground() {
+        final NetworkTemplate template = mArgs.getParcelable(KEY_TEMPLATE);
+        final long start = mArgs.getLong(KEY_START);
+        final long end = mArgs.getLong(KEY_END);
+
+        try {
+            return mStatsService.getSummaryForAllUid(template, start, end, false);
+        } catch (RemoteException e) {
+            return null;
+        }
+    }
+
+    @Override
+    protected void onStopLoading() {
+        super.onStopLoading();
+        cancelLoad();
+    }
+
+    @Override
+    protected void onReset() {
+        super.onReset();
+        cancelLoad();
+    }
+}