Add version 2 of AppDataUsagePreferenceController.

- a simple copy of AppDataUsagePreferenceController to
AppDataUsagePreferenceControllerV2, so that future modification can
be compared more easily.

Bug: 111751694
Test: make RunSettingsRoboTests
Change-Id: Ibeed7775a223794bf50f36b3b933e270a55e3b39

src/com/android/settings/applications/appinfo/AppDataUsagePreferenceControllerV2.java

@@ -0,0 +1,149 @@
+/*
+ * Copyright (C) 2017 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.applications.appinfo;
+
+import android.content.Context;
+import android.net.INetworkStatsService;
+import android.net.INetworkStatsSession;
+import android.net.NetworkTemplate;
+import android.os.Bundle;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+import android.text.format.DateUtils;
+import android.text.format.Formatter;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.loader.app.LoaderManager;
+import androidx.loader.content.Loader;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.R;
+import com.android.settings.SettingsPreferenceFragment;
+import com.android.settings.Utils;
+import com.android.settings.datausage.AppDataUsage;
+import com.android.settings.datausage.DataUsageList;
+import com.android.settings.datausage.DataUsageUtils;
+import com.android.settingslib.AppItem;
+import com.android.settingslib.core.lifecycle.LifecycleObserver;
+import com.android.settingslib.core.lifecycle.events.OnPause;
+import com.android.settingslib.core.lifecycle.events.OnResume;
+import com.android.settingslib.net.ChartData;
+import com.android.settingslib.net.ChartDataLoaderCompat;
+
+public class AppDataUsagePreferenceControllerV2 extends AppInfoPreferenceControllerBase
+        implements LoaderManager.LoaderCallbacks<ChartData>, LifecycleObserver, OnResume, OnPause {
+
+    private ChartData mChartData;
+    private INetworkStatsSession mStatsSession;
+
+    public AppDataUsagePreferenceControllerV2(Context context,String key) {
+        super(context, key);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return isBandwidthControlEnabled() ? AVAILABLE : CONDITIONALLY_UNAVAILABLE;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        if (isAvailable()) {
+            final INetworkStatsService statsService = INetworkStatsService.Stub.asInterface(
+                    ServiceManager.getService(Context.NETWORK_STATS_SERVICE));
+            try {
+                mStatsSession = statsService.openSession();
+            } catch (RemoteException e) {
+                throw new RuntimeException(e);
+            }
+        }
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        preference.setSummary(getDataSummary());
+    }
+
+    @Override
+    public void onResume() {
+        if (mStatsSession != null) {
+            final int uid = mParent.getAppEntry().info.uid;
+            final AppItem app = new AppItem(uid);
+            app.addUid(uid);
+            mParent.getLoaderManager().restartLoader(mParent.LOADER_CHART_DATA,
+                    ChartDataLoaderCompat.buildArgs(getTemplate(mContext), app),
+                    this);
+        }
+    }
+
+    @Override
+    public void onPause() {
+        mParent.getLoaderManager().destroyLoader(mParent.LOADER_CHART_DATA);
+    }
+
+    @Override
+    public Loader<ChartData> onCreateLoader(int id, Bundle args) {
+        return new ChartDataLoaderCompat(mContext, mStatsSession, args);
+    }
+
+    @Override
+    public void onLoadFinished(Loader<ChartData> loader, ChartData data) {
+        mChartData = data;
+        updateState(mPreference);
+    }
+
+    @Override
+    public void onLoaderReset(Loader<ChartData> loader) {
+        // Leave last result.
+    }
+
+    @Override
+    protected Class<? extends SettingsPreferenceFragment> getDetailFragmentClass() {
+        return AppDataUsage.class;
+    }
+
+    private CharSequence getDataSummary() {
+        if (mChartData != null) {
+            final long totalBytes = mChartData.detail.getTotalBytes();
+            if (totalBytes == 0) {
+                return mContext.getString(R.string.no_data_usage);
+            }
+            return mContext.getString(R.string.data_summary_format,
+                    Formatter.formatFileSize(mContext, totalBytes),
+                    DateUtils.formatDateTime(mContext, mChartData.detail.getStart(),
+                            DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_ABBREV_MONTH));
+        }
+        return mContext.getString(R.string.computing_size);
+    }
+
+    private static NetworkTemplate getTemplate(Context context) {
+        if (DataUsageUtils.hasReadyMobileRadio(context)) {
+            return NetworkTemplate.buildTemplateMobileWildcard();
+        }
+        if (DataUsageUtils.hasWifiRadio(context)) {
+            return NetworkTemplate.buildTemplateWifiWildcard();
+        }
+        return NetworkTemplate.buildTemplateEthernet();
+    }
+
+    @VisibleForTesting
+    boolean isBandwidthControlEnabled() {
+        return Utils.isBandwidthControlEnabled();
+    }
+
+}