Improve the latency of DataUsageList

Up to 30x faster. Currently it load the usage detail for every day at the beginning, so it's quite slow. To fix, - Not load the usage detail for every day at the beginning - Load only the cycles first - And only load the daily detail for the selected month Fix: 290856342 Test: manual - on DataUsageList (cell & wifi) Test: unit tests Change-Id: Ie18fa68f801743389bd6b6a28e236dcf1fea00e4
2023-09-15 13:50:11 +08:00
parent db9fdb0de8
commit 2205762482
19 changed files with 1185 additions and 727 deletions
--- a/src/com/android/settings/datausage/AppDataUsage.java
+++ b/src/com/android/settings/datausage/AppDataUsage.java
@@ -31,6 +31,7 @@ import android.telephony.SubscriptionManager;
 import android.util.ArraySet;
 import android.util.IconDrawableFactory;
 import android.util.Log;
+import android.util.Range;
 import android.view.View;
 import android.widget.AdapterView;

@@ -472,7 +473,9 @@ public class AppDataUsage extends DataUsageBaseFragment implements OnPreferenceC
                        List<NetworkCycleDataForUid> data) {
                    mUsageData = data;
                    mCycle.setOnItemSelectedListener(mCycleListener);
-                    mCycleAdapter.updateCycleList(data);
+                    mCycleAdapter.updateCycleList(data.stream()
+                            .map(cycle -> new Range<>(cycle.getStartTime(), cycle.getEndTime()))
+                            .toList());
                    if (mSelectedCycle > 0L) {
                        final int numCycles = data.size();
                        int position = 0;
--- a/src/com/android/settings/datausage/ChartDataUsagePreference.java
+++ b/src/com/android/settings/datausage/ChartDataUsagePreference.java
@@ -26,15 +26,17 @@ import android.util.AttributeSet;
 import android.util.DataUnit;
 import android.util.SparseIntArray;

+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
 import androidx.preference.Preference;
 import androidx.preference.PreferenceViewHolder;

 import com.android.settings.R;
 import com.android.settings.Utils;
+import com.android.settings.datausage.lib.NetworkCycleChartData;
+import com.android.settings.datausage.lib.NetworkUsageData;
 import com.android.settings.widget.UsageView;
-import com.android.settingslib.net.NetworkCycleChartData;
-import com.android.settingslib.net.NetworkCycleData;

 import java.util.ArrayList;
 import java.util.Comparator;
@@ -51,8 +53,8 @@ public class ChartDataUsagePreference extends Preference {
    private final int mWarningColor;
    private final int mLimitColor;

-    private Resources mResources;
-    private NetworkPolicy mPolicy;
+    private final Resources mResources;
+    @Nullable private NetworkPolicy mPolicy;
    private long mStart;
    private long mEnd;
    private NetworkCycleChartData mNetworkCycleChartData;
@@ -67,18 +69,16 @@ public class ChartDataUsagePreference extends Preference {
    }

    @Override
-    public void onBindViewHolder(PreferenceViewHolder holder) {
+    public void onBindViewHolder(@NonNull PreferenceViewHolder holder) {
        super.onBindViewHolder(holder);
-        final UsageView chart = (UsageView) holder.findViewById(R.id.data_usage);
-        if (mNetworkCycleChartData == null) {
-            return;
-        }
-
+        final UsageView chart = holder.itemView.requireViewById(R.id.data_usage);
        final int top = getTop();
        chart.clearPaths();
        chart.configureGraph(toInt(mEnd - mStart), top);
-        calcPoints(chart, mNetworkCycleChartData.getUsageBuckets());
-        setupContentDescription(chart, mNetworkCycleChartData.getUsageBuckets());
+        if (mNetworkCycleChartData != null) {
+            calcPoints(chart, mNetworkCycleChartData.getDailyUsage());
+            setupContentDescription(chart, mNetworkCycleChartData.getDailyUsage());
+        }
        chart.setBottomLabels(new CharSequence[] {
                Utils.formatDateRange(getContext(), mStart, mStart),
                Utils.formatDateRange(getContext(), mEnd, mEnd),
@@ -88,23 +88,21 @@ public class ChartDataUsagePreference extends Preference {
    }

    public int getTop() {
-        final long totalData = mNetworkCycleChartData.getTotalUsage();
+        final long totalData =
+                mNetworkCycleChartData != null ? mNetworkCycleChartData.getTotal().getUsage() : 0;
        final long policyMax =
            mPolicy != null ? Math.max(mPolicy.limitBytes, mPolicy.warningBytes) : 0;
        return (int) (Math.max(totalData, policyMax) / RESOLUTION);
    }

    @VisibleForTesting
-    void calcPoints(UsageView chart, List<NetworkCycleData> usageSummary) {
-        if (usageSummary == null) {
-            return;
-        }
+    void calcPoints(UsageView chart, @NonNull List<NetworkUsageData> usageSummary) {
        final SparseIntArray points = new SparseIntArray();
        points.put(0, 0);

        final long now = System.currentTimeMillis();
        long totalData = 0;
-        for (NetworkCycleData data : usageSummary) {
+        for (NetworkUsageData data : usageSummary) {
            final long startTime = data.getStartTime();
            if (startTime > now) {
                break;
@@ -112,7 +110,7 @@ public class ChartDataUsagePreference extends Preference {
            final long endTime = data.getEndTime();

            // increment by current bucket total
-            totalData += data.getTotalUsage();
+            totalData += data.getUsage();

            if (points.size() == 1) {
                points.put(toInt(startTime - mStart) - 1, -1);
@@ -125,7 +123,8 @@ public class ChartDataUsagePreference extends Preference {
        }
    }

-    private void setupContentDescription(UsageView chart, List<NetworkCycleData> usageSummary) {
+    private void setupContentDescription(
+            UsageView chart, @NonNull List<NetworkUsageData> usageSummary) {
        final Context context = getContext();
        final StringBuilder contentDescription = new StringBuilder();
        final int flags = DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_ABBREV_MONTH;
@@ -137,7 +136,7 @@ public class ChartDataUsagePreference extends Preference {
                .getString(R.string.data_usage_chart_brief_content_description, startDate, endDate);
        contentDescription.append(briefContentDescription);

-        if (usageSummary == null || usageSummary.isEmpty()) {
+        if (usageSummary.isEmpty()) {
            final String noDataContentDescription = mResources
                    .getString(R.string.data_usage_chart_no_data_content_description);
            contentDescription.append(noDataContentDescription);
@@ -170,17 +169,17 @@ public class ChartDataUsagePreference extends Preference {
     * Collect the date of the same percentage, e.g., Aug 2 to Aug 22: 0%; Aug 23: 2%.
     */
    @VisibleForTesting
-    List<DataUsageSummaryNode> getDensedStatsData(List<NetworkCycleData> usageSummary) {
+    List<DataUsageSummaryNode> getDensedStatsData(@NonNull List<NetworkUsageData> usageSummary) {
        final List<DataUsageSummaryNode> dataUsageSummaryNodes = new ArrayList<>();
        final long overallDataUsage = Math.max(1L, usageSummary.stream()
-                .mapToLong(NetworkCycleData::getTotalUsage).sum());
+                .mapToLong(NetworkUsageData::getUsage).sum());
        long cumulatedDataUsage = 0L;
-        int cumulatedDataUsagePercentage = 0;

        // Collect List of DataUsageSummaryNode for data usage percentage information.
-        for (NetworkCycleData data : usageSummary) {
-            cumulatedDataUsage += data.getTotalUsage();
-            cumulatedDataUsagePercentage = (int) ((cumulatedDataUsage * 100) / overallDataUsage);
+        for (NetworkUsageData data : usageSummary) {
+            cumulatedDataUsage += data.getUsage();
+            int cumulatedDataUsagePercentage =
+                    (int) ((cumulatedDataUsage * 100) / overallDataUsage);

            final DataUsageSummaryNode node = new DataUsageSummaryNode(data.getStartTime(),
                    data.getEndTime(), cumulatedDataUsagePercentage);
@@ -268,8 +267,9 @@ public class ChartDataUsagePreference extends Preference {
        }

        if (policy.warningBytes != NetworkPolicy.WARNING_DISABLED) {
-            chart.setDividerLoc((int) (policy.warningBytes / RESOLUTION));
-            float weight = policy.warningBytes / RESOLUTION / (float) top;
+            int dividerLoc = (int) (policy.warningBytes / RESOLUTION);
+            chart.setDividerLoc(dividerLoc);
+            float weight = dividerLoc / (float) top;
            float above = 1 - weight;
            chart.setSideLabelWeights(above, weight);
            middleVisibility = mWarningColor;
@@ -289,15 +289,21 @@ public class ChartDataUsagePreference extends Preference {
        return new SpannableStringBuilder().append(label, new ForegroundColorSpan(mLimitColor), 0);
    }

-    public void setNetworkPolicy(NetworkPolicy policy) {
+    /** Sets network policy. */
+    public void setNetworkPolicy(@Nullable NetworkPolicy policy) {
        mPolicy = policy;
        notifyChanged();
    }

+    /** Sets time. */
+    public void setTime(long start, long end) {
+        mStart = start;
+        mEnd = end;
+        notifyChanged();
+    }
+
    public void setNetworkCycleData(NetworkCycleChartData data) {
        mNetworkCycleChartData = data;
-        mStart = data.getStartTime();
-        mEnd = data.getEndTime();
        notifyChanged();
    }
 }
--- a/src/com/android/settings/datausage/ChartDataUsagePreferenceController.kt
+++ b/src/com/android/settings/datausage/ChartDataUsagePreferenceController.kt
@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2023 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.datausage
+
+import android.content.Context
+import android.net.NetworkTemplate
+import androidx.annotation.OpenForTesting
+import androidx.annotation.VisibleForTesting
+import androidx.lifecycle.LifecycleCoroutineScope
+import androidx.lifecycle.LifecycleOwner
+import androidx.lifecycle.lifecycleScope
+import androidx.preference.PreferenceScreen
+import com.android.settings.core.BasePreferenceController
+import com.android.settings.datausage.lib.INetworkCycleDataRepository
+import com.android.settings.datausage.lib.NetworkCycleDataRepository
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+
+@OpenForTesting
+open class ChartDataUsagePreferenceController(context: Context, preferenceKey: String) :
+    BasePreferenceController(context, preferenceKey) {
+
+    private lateinit var repository: INetworkCycleDataRepository
+    private lateinit var preference: ChartDataUsagePreference
+    private lateinit var lifecycleScope: LifecycleCoroutineScope
+
+    open fun init(template: NetworkTemplate) {
+        this.repository = NetworkCycleDataRepository(mContext, template)
+    }
+
+    @VisibleForTesting
+    fun init(repository: INetworkCycleDataRepository) {
+        this.repository = repository
+    }
+
+    override fun getAvailabilityStatus() = AVAILABLE
+
+    override fun displayPreference(screen: PreferenceScreen) {
+        super.displayPreference(screen)
+        preference = screen.findPreference(preferenceKey)!!
+    }
+
+    override fun onViewCreated(viewLifecycleOwner: LifecycleOwner) {
+        lifecycleScope = viewLifecycleOwner.lifecycleScope
+    }
+
+    /**
+     * Sets whether billing cycle modifiable.
+     *
+     * Don't bind warning / limit sweeps if not modifiable.
+     */
+    open fun setBillingCycleModifiable(isModifiable: Boolean) {
+        preference.setNetworkPolicy(
+            if (isModifiable) repository.getPolicy() else null
+        )
+    }
+
+    fun update(startTime: Long, endTime: Long) {
+        preference.setTime(startTime, endTime)
+        lifecycleScope.launch {
+            val chartData = withContext(Dispatchers.Default) {
+                repository.querySummary(startTime, endTime)
+            }
+            preference.setNetworkCycleData(chartData)
+        }
+    }
+}
--- a/src/com/android/settings/datausage/CycleAdapter.java
+++ b/src/com/android/settings/datausage/CycleAdapter.java
@@ -14,9 +14,9 @@
 package com.android.settings.datausage;

 import android.content.Context;
+import android.util.Range;

 import com.android.settings.Utils;
-import com.android.settingslib.net.NetworkCycleData;
 import com.android.settingslib.widget.SettingsSpinnerAdapter;

 import java.util.List;
@@ -62,15 +62,15 @@ public class CycleAdapter extends SettingsSpinnerAdapter<CycleAdapter.CycleItem>
     * Rebuild list based on network data. Always selects the newest item,
     * updating the inspection range on chartData.
     */
-    public void updateCycleList(List<? extends NetworkCycleData> cycleData) {
+    public void updateCycleList(List<Range<Long>> cycleData) {
        // stash away currently selected cycle to try restoring below
        final CycleAdapter.CycleItem previousItem = (CycleAdapter.CycleItem)
                mSpinner.getSelectedItem();
        clear();

        final Context context = getContext();
-        for (NetworkCycleData data : cycleData) {
-            add(new CycleAdapter.CycleItem(context, data.getStartTime(), data.getEndTime()));
+        for (Range<Long> cycle : cycleData) {
+            add(new CycleAdapter.CycleItem(context, cycle.getLower(), cycle.getUpper()));
        }

        // force pick the current cycle (first item)
--- a/src/com/android/settings/datausage/DataUsageList.java
+++ b/src/com/android/settings/datausage/DataUsageList.java
@@ -1,358 +0,0 @@
-/*
- * Copyright (C) 2018 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.datausage;
-
-import android.app.Activity;
-import android.app.settings.SettingsEnums;
-import android.content.Context;
-import android.content.Intent;
-import android.net.NetworkPolicy;
-import android.net.NetworkTemplate;
-import android.os.Bundle;
-import android.os.UserManager;
-import android.provider.Settings;
-import android.telephony.SubscriptionManager;
-import android.util.EventLog;
-import android.util.Log;
-import android.view.View;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.annotation.VisibleForTesting;
-import androidx.lifecycle.Lifecycle;
-import androidx.loader.app.LoaderManager.LoaderCallbacks;
-import androidx.loader.content.Loader;
-import androidx.preference.Preference;
-
-import com.android.settings.R;
-import com.android.settings.datausage.lib.BillingCycleRepository;
-import com.android.settings.network.MobileDataEnabledListener;
-import com.android.settings.network.MobileNetworkRepository;
-import com.android.settings.widget.LoadingViewController;
-import com.android.settingslib.mobile.dataservice.SubscriptionInfoEntity;
-import com.android.settingslib.net.NetworkCycleChartData;
-import com.android.settingslib.net.NetworkCycleChartDataLoader;
-import com.android.settingslib.utils.ThreadUtils;
-
-import java.util.List;
-import java.util.Objects;
-import java.util.Optional;
-
-import kotlin.Unit;
-
-/**
- * Panel showing data usage history across various networks, including options
- * to inspect based on usage cycle and control through {@link NetworkPolicy}.
- */
-public class DataUsageList extends DataUsageBaseFragment
-        implements MobileDataEnabledListener.Client {
-
-    static final String EXTRA_SUB_ID = "sub_id";
-    static final String EXTRA_NETWORK_TEMPLATE = "network_template";
-
-    private static final String TAG = "DataUsageList";
-    private static final boolean LOGD = false;
-
-    private static final String KEY_USAGE_AMOUNT = "usage_amount";
-    private static final String KEY_CHART_DATA = "chart_data";
-    private static final String KEY_TEMPLATE = "template";
-    private static final String KEY_APP = "app";
-
-    @VisibleForTesting
-    static final int LOADER_CHART_DATA = 2;
-
-    @VisibleForTesting
-    MobileDataEnabledListener mDataStateListener;
-
-    @VisibleForTesting
-    NetworkTemplate mTemplate;
-    @VisibleForTesting
-    int mSubId = SubscriptionManager.INVALID_SUBSCRIPTION_ID;
-    @VisibleForTesting
-    LoadingViewController mLoadingViewController;
-
-    private ChartDataUsagePreference mChart;
-
-    @Nullable
-    private List<NetworkCycleChartData> mCycleData;
-
-    // Spinner will keep the selected cycle even after paused, this only keeps the displayed cycle,
-    // which need be cleared when resumed.
-    private CycleAdapter.CycleItem mLastDisplayedCycle;
-    private Preference mUsageAmount;
-    private MobileNetworkRepository mMobileNetworkRepository;
-    private SubscriptionInfoEntity mSubscriptionInfoEntity;
-    private DataUsageListAppsController mDataUsageListAppsController;
-    private BillingCycleRepository mBillingCycleRepository;
-    @VisibleForTesting
-    DataUsageListHeaderController mDataUsageListHeaderController;
-
-    private boolean mIsBillingCycleModifiable = false;
-
-    @Override
-    public int getMetricsCategory() {
-        return SettingsEnums.DATA_USAGE_LIST;
-    }
-
-    @Override
-    public void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        if (isGuestUser(getContext())) {
-            Log.e(TAG, "This setting isn't available for guest user");
-            EventLog.writeEvent(0x534e4554, "262741858", -1 /* UID */, "Guest user");
-            finish();
-            return;
-        }
-
-        final Activity activity = getActivity();
-        mBillingCycleRepository = createBillingCycleRepository();
-        if (!mBillingCycleRepository.isBandwidthControlEnabled()) {
-            Log.w(TAG, "No bandwidth control; leaving");
-            activity.finish();
-            return;
-        }
-
-        mUsageAmount = findPreference(KEY_USAGE_AMOUNT);
-        mChart = findPreference(KEY_CHART_DATA);
-
-        processArgument();
-        if (mTemplate == null) {
-            Log.e(TAG, "No template; leaving");
-            finish();
-            return;
-        }
-        updateSubscriptionInfoEntity();
-        mDataStateListener = new MobileDataEnabledListener(activity, this);
-        mDataUsageListAppsController = use(DataUsageListAppsController.class);
-        mDataUsageListAppsController.init(mTemplate);
-    }
-
-    @VisibleForTesting
-    @NonNull
-    BillingCycleRepository createBillingCycleRepository() {
-        return new BillingCycleRepository(requireContext());
-    }
-
-    @Override
-    public void onViewCreated(@NonNull View v, Bundle savedInstanceState) {
-        super.onViewCreated(v, savedInstanceState);
-
-        mDataUsageListHeaderController = new DataUsageListHeaderController(
-                setPinnedHeaderView(R.layout.apps_filter_spinner),
-                mTemplate,
-                getMetricsCategory(),
-                (cycle, position) -> {
-                    updateSelectedCycle(cycle, position);
-                    return Unit.INSTANCE;
-                }
-        );
-
-        mLoadingViewController = new LoadingViewController(
-                getView().findViewById(R.id.loading_container), getListView());
-    }
-
-    @Override
-    public void onResume() {
-        super.onResume();
-        mLoadingViewController.showLoadingViewDelayed();
-        mDataStateListener.start(mSubId);
-        mLastDisplayedCycle = null;
-        updatePolicy();
-
-        // kick off loader for network history
-        // TODO: consider chaining two loaders together instead of reloading
-        // network history when showing app detail.
-        getLoaderManager().restartLoader(LOADER_CHART_DATA,
-                buildArgs(mTemplate), mNetworkCycleDataCallbacks);
-    }
-
-    @Override
-    public void onPause() {
-        super.onPause();
-        mDataStateListener.stop();
-
-        getLoaderManager().destroyLoader(LOADER_CHART_DATA);
-    }
-
-    @Override
-    protected int getPreferenceScreenResId() {
-        return R.xml.data_usage_list;
-    }
-
-    @Override
-    protected String getLogTag() {
-        return TAG;
-    }
-
-    void processArgument() {
-        final Bundle args = getArguments();
-        if (args != null) {
-            mSubId = args.getInt(EXTRA_SUB_ID, SubscriptionManager.INVALID_SUBSCRIPTION_ID);
-            mTemplate = args.getParcelable(EXTRA_NETWORK_TEMPLATE);
-        }
-        if (mTemplate == null && mSubId == SubscriptionManager.INVALID_SUBSCRIPTION_ID) {
-            final Intent intent = getIntent();
-            mSubId = intent.getIntExtra(Settings.EXTRA_SUB_ID,
-                    SubscriptionManager.INVALID_SUBSCRIPTION_ID);
-            mTemplate = intent.getParcelableExtra(Settings.EXTRA_NETWORK_TEMPLATE);
-
-            if (mTemplate == null) {
-                Optional<NetworkTemplate> mobileNetworkTemplateFromSim =
-                        DataUsageUtils.getMobileNetworkTemplateFromSubId(getContext(), getIntent());
-                if (mobileNetworkTemplateFromSim.isPresent()) {
-                    mTemplate = mobileNetworkTemplateFromSim.get();
-                }
-            }
-        }
-    }
-
-    @VisibleForTesting
-    void updateSubscriptionInfoEntity() {
-        mMobileNetworkRepository = MobileNetworkRepository.getInstance(getContext());
-        ThreadUtils.postOnBackgroundThread(() -> {
-            mSubscriptionInfoEntity = mMobileNetworkRepository.getSubInfoById(
-                    String.valueOf(mSubId));
-        });
-    }
-
-    /**
-     * Implementation of {@code MobileDataEnabledListener.Client}
-     */
-    public void onMobileDataEnabledChange() {
-        updatePolicy();
-    }
-
-    private Bundle buildArgs(NetworkTemplate template) {
-        final Bundle args = new Bundle();
-        args.putParcelable(KEY_TEMPLATE, template);
-        args.putParcelable(KEY_APP, null);
-        return args;
-    }
-
-    /**
-     * Update chart sweeps and cycle list to reflect {@link NetworkPolicy} for
-     * current {@link #mTemplate}.
-     */
-    @VisibleForTesting
-    void updatePolicy() {
-        mIsBillingCycleModifiable = isBillingCycleModifiable();
-        if (mIsBillingCycleModifiable) {
-            mChart.setNetworkPolicy(services.mPolicyEditor.getPolicy(mTemplate));
-        } else {
-            mChart.setNetworkPolicy(null);  // don't bind warning / limit sweeps
-        }
-        updateConfigButtonVisibility();
-    }
-
-    @VisibleForTesting
-    boolean isBillingCycleModifiable() {
-        return mBillingCycleRepository.isModifiable(mSubId)
-                && SubscriptionManager.from(requireContext())
-                .getActiveSubscriptionInfo(mSubId) != null;
-    }
-
-    private void updateConfigButtonVisibility() {
-        mDataUsageListHeaderController.setConfigButtonVisible(
-                mIsBillingCycleModifiable && mCycleData != null);
-    }
-
-    /**
-     * Updates the chart and detail data when initial loaded or selected cycle changed.
-     */
-    private void updateSelectedCycle(CycleAdapter.CycleItem cycle, int position) {
-        // Avoid from updating UI after #onStop.
-        if (!getLifecycle().getCurrentState().isAtLeast(Lifecycle.State.STARTED)) {
-            return;
-        }
-
-        // Avoid from updating UI when async query still on-going.
-        // This could happen when a request from #onMobileDataEnabledChange.
-        if (mCycleData == null) {
-            return;
-        }
-
-        if (Objects.equals(cycle, mLastDisplayedCycle)) {
-            // Avoid duplicate update to avoid page flash.
-            return;
-        }
-        mLastDisplayedCycle = cycle;
-
-        if (LOGD) {
-            Log.d(TAG, "showing cycle " + cycle + ", [start=" + cycle.start + ", end="
-                    + cycle.end + "]");
-        }
-
-        // update chart to show selected cycle, and update detail data
-        // to match updated sweep bounds.
-        NetworkCycleChartData cycleChartData = mCycleData.get(position);
-        mChart.setNetworkCycleData(cycleChartData);
-
-        updateDetailData(cycleChartData);
-    }
-
-    /**
-     * Update details based on {@link #mChart} inspection range depending on
-     * current mode. Updates {@link #mAdapter} with sorted list
-     * of applications data usage.
-     */
-    private void updateDetailData(NetworkCycleChartData cycleChartData) {
-        if (LOGD) Log.d(TAG, "updateDetailData()");
-
-        // kick off loader for detailed stats
-        mDataUsageListAppsController.update(
-                mSubscriptionInfoEntity == null ? null : mSubscriptionInfoEntity.carrierId,
-                cycleChartData.getStartTime(),
-                cycleChartData.getEndTime()
-        );
-
-        final long totalBytes = cycleChartData.getTotalUsage();
-        final CharSequence totalPhrase = DataUsageUtils.formatDataUsage(getActivity(), totalBytes);
-        mUsageAmount.setTitle(getString(R.string.data_used_template, totalPhrase));
-    }
-
-    @VisibleForTesting
-    final LoaderCallbacks<List<NetworkCycleChartData>> mNetworkCycleDataCallbacks =
-            new LoaderCallbacks<>() {
-                @Override
-                @NonNull
-                public Loader<List<NetworkCycleChartData>> onCreateLoader(int id, Bundle args) {
-                    return NetworkCycleChartDataLoader.builder(getContext())
-                            .setNetworkTemplate(mTemplate)
-                            .build();
-                }
-
-                @Override
-                public void onLoadFinished(@NonNull Loader<List<NetworkCycleChartData>> loader,
-                        List<NetworkCycleChartData> data) {
-                    mLoadingViewController.showContent(false /* animate */);
-                    mCycleData = data;
-                    mDataUsageListHeaderController.updateCycleData(mCycleData);
-                    updateConfigButtonVisibility();
-                    mDataUsageListAppsController.setCycleData(mCycleData);
-                }
-
-                @Override
-                public void onLoaderReset(@NonNull Loader<List<NetworkCycleChartData>> loader) {
-                    mCycleData = null;
-                }
-            };
-
-    private static boolean isGuestUser(Context context) {
-        if (context == null) return false;
-        final UserManager userManager = context.getSystemService(UserManager.class);
-        if (userManager == null) return false;
-        return userManager.isGuestUser();
-    }
-}
--- a/src/com/android/settings/datausage/DataUsageList.kt
+++ b/src/com/android/settings/datausage/DataUsageList.kt
@@ -0,0 +1,229 @@
+/*
+ * Copyright (C) 2023 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.datausage
+
+import android.app.settings.SettingsEnums
+import android.net.NetworkPolicy
+import android.net.NetworkTemplate
+import android.os.Bundle
+import android.provider.Settings
+import android.telephony.SubscriptionManager
+import android.util.EventLog
+import android.util.Log
+import android.view.View
+import androidx.annotation.OpenForTesting
+import androidx.annotation.VisibleForTesting
+import androidx.preference.Preference
+import com.android.settings.R
+import com.android.settings.datausage.lib.BillingCycleRepository
+import com.android.settings.datausage.lib.NetworkUsageData
+import com.android.settings.network.MobileDataEnabledListener
+import com.android.settings.network.MobileNetworkRepository
+import com.android.settingslib.mobile.dataservice.SubscriptionInfoEntity
+import com.android.settingslib.spaprivileged.framework.common.userManager
+import com.android.settingslib.utils.ThreadUtils
+import kotlin.jvm.optionals.getOrNull
+
+/**
+ * Panel showing data usage history across various networks, including options
+ * to inspect based on usage cycle and control through [NetworkPolicy].
+ */
+@OpenForTesting
+open class DataUsageList : DataUsageBaseFragment(), MobileDataEnabledListener.Client {
+    @VisibleForTesting
+    lateinit var dataStateListener: MobileDataEnabledListener
+
+    @JvmField
+    @VisibleForTesting
+    var template: NetworkTemplate? = null
+
+    @JvmField
+    @VisibleForTesting
+    var subId = SubscriptionManager.INVALID_SUBSCRIPTION_ID
+
+    // Spinner will keep the selected cycle even after paused, this only keeps the displayed cycle,
+    // which need be cleared when resumed.
+    private var lastDisplayedUsageData: NetworkUsageData? = null
+    private lateinit var usageAmount: Preference
+    private var subscriptionInfoEntity: SubscriptionInfoEntity? = null
+    private lateinit var dataUsageListAppsController: DataUsageListAppsController
+    private lateinit var chartDataUsagePreferenceController: ChartDataUsagePreferenceController
+    private lateinit var billingCycleRepository: BillingCycleRepository
+
+    @VisibleForTesting
+    var dataUsageListHeaderController: DataUsageListHeaderController? = null
+
+    override fun getMetricsCategory() = SettingsEnums.DATA_USAGE_LIST
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        if (requireContext().userManager.isGuestUser) {
+            Log.e(TAG, "This setting isn't available for guest user")
+            EventLog.writeEvent(0x534e4554, "262741858", -1 /* UID */, "Guest user")
+            finish()
+            return
+        }
+        billingCycleRepository = createBillingCycleRepository();
+        if (!billingCycleRepository.isBandwidthControlEnabled()) {
+            Log.w(TAG, "No bandwidth control; leaving")
+            finish()
+            return
+        }
+        usageAmount = findPreference(KEY_USAGE_AMOUNT)!!
+        processArgument()
+        val template = template
+        if (template == null) {
+            Log.e(TAG, "No template; leaving")
+            finish()
+            return
+        }
+        updateSubscriptionInfoEntity()
+        dataStateListener = MobileDataEnabledListener(activity, this)
+        dataUsageListAppsController = use(DataUsageListAppsController::class.java).apply {
+            init(template)
+        }
+        chartDataUsagePreferenceController = use(ChartDataUsagePreferenceController::class.java)
+        chartDataUsagePreferenceController.init(template)
+    }
+
+    @VisibleForTesting
+    open fun createBillingCycleRepository() = BillingCycleRepository(requireContext())
+
+    override fun onViewCreated(v: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(v, savedInstanceState)
+
+        val template = template ?: return
+        dataUsageListHeaderController = DataUsageListHeaderController(
+            setPinnedHeaderView(R.layout.apps_filter_spinner),
+            template,
+            metricsCategory,
+            viewLifecycleOwner,
+            ::onCyclesLoad,
+            ::updateSelectedCycle,
+        )
+    }
+
+    override fun onResume() {
+        super.onResume()
+        dataStateListener.start(subId)
+        lastDisplayedUsageData = null
+        updatePolicy()
+    }
+
+    override fun onPause() {
+        super.onPause()
+        dataStateListener.stop()
+    }
+
+    override fun getPreferenceScreenResId() = R.xml.data_usage_list
+
+    override fun getLogTag() = TAG
+
+    fun processArgument() {
+        arguments?.let {
+            subId = it.getInt(EXTRA_SUB_ID, SubscriptionManager.INVALID_SUBSCRIPTION_ID)
+            template = it.getParcelable(EXTRA_NETWORK_TEMPLATE, NetworkTemplate::class.java)
+        }
+        if (template == null && subId == SubscriptionManager.INVALID_SUBSCRIPTION_ID) {
+            subId = intent.getIntExtra(
+                Settings.EXTRA_SUB_ID,
+                SubscriptionManager.INVALID_SUBSCRIPTION_ID,
+            )
+            template = intent.getParcelableExtra(
+                Settings.EXTRA_NETWORK_TEMPLATE,
+                NetworkTemplate::class.java,
+            ) ?: DataUsageUtils.getMobileNetworkTemplateFromSubId(context, intent).getOrNull()
+        }
+    }
+
+    @VisibleForTesting
+    open fun updateSubscriptionInfoEntity() {
+        ThreadUtils.postOnBackgroundThread {
+            subscriptionInfoEntity =
+                MobileNetworkRepository.getInstance(context).getSubInfoById(subId.toString())
+        }
+    }
+
+    /**
+     * Implementation of `MobileDataEnabledListener.Client`
+     */
+    override fun onMobileDataEnabledChange() {
+        updatePolicy()
+    }
+
+    /** Update chart sweeps and cycle list to reflect [NetworkPolicy] for current [template]. */
+    @VisibleForTesting
+    fun updatePolicy() {
+        val isBillingCycleModifiable = isBillingCycleModifiable()
+        dataUsageListHeaderController?.setConfigButtonVisible(isBillingCycleModifiable)
+        chartDataUsagePreferenceController.setBillingCycleModifiable(isBillingCycleModifiable)
+    }
+
+    @VisibleForTesting
+    open fun isBillingCycleModifiable(): Boolean {
+        return (billingCycleRepository.isModifiable(subId) &&
+            requireContext().getSystemService(SubscriptionManager::class.java)!!
+                .getActiveSubscriptionInfo(subId) != null)
+    }
+
+    private fun onCyclesLoad(networkUsageData: List<NetworkUsageData>) {
+        dataUsageListAppsController.updateCycles(networkUsageData)
+    }
+
+    /**
+     * Updates the chart and detail data when initial loaded or selected cycle changed.
+     */
+    private fun updateSelectedCycle(usageData: NetworkUsageData) {
+        if (usageData == lastDisplayedUsageData) {
+            // Avoid duplicate update to avoid page flash.
+            return
+        }
+        lastDisplayedUsageData = usageData
+        Log.d(TAG, "showing cycle $usageData")
+
+        val totalPhrase = DataUsageUtils.formatDataUsage(requireContext(), usageData.usage)
+        usageAmount.title = getString(R.string.data_used_template, totalPhrase)
+
+        updateChart(usageData)
+        updateApps(usageData)
+    }
+
+    /** Updates chart to show selected cycle. */
+    private fun updateChart(usageData: NetworkUsageData) {
+        chartDataUsagePreferenceController.update(
+            startTime = usageData.startTime,
+            endTime = usageData.endTime,
+        )
+    }
+
+    /** Updates applications data usage. */
+    private fun updateApps(usageData: NetworkUsageData) {
+        dataUsageListAppsController.update(
+            carrierId = subscriptionInfoEntity?.carrierId,
+            startTime = usageData.startTime,
+            endTime = usageData.endTime,
+        )
+    }
+
+    companion object {
+        const val EXTRA_SUB_ID = "sub_id"
+        const val EXTRA_NETWORK_TEMPLATE = "network_template"
+
+        private const val TAG = "DataUsageList"
+        private const val KEY_USAGE_AMOUNT = "usage_amount"
+    }
+}
--- a/src/com/android/settings/datausage/DataUsageListAppsController.kt
+++ b/src/com/android/settings/datausage/DataUsageListAppsController.kt
@@ -31,8 +31,8 @@ import com.android.settings.R
 import com.android.settings.core.BasePreferenceController
 import com.android.settings.core.SubSettingLauncher
 import com.android.settings.datausage.lib.AppDataUsageRepository
+import com.android.settings.datausage.lib.NetworkUsageData
 import com.android.settingslib.AppItem
-import com.android.settingslib.net.NetworkCycleChartData
 import com.android.settingslib.net.UidDetailProvider
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
@@ -48,7 +48,7 @@ open class DataUsageListAppsController(context: Context, preferenceKey: String)
    private lateinit var preference: PreferenceGroup
    private lateinit var lifecycleScope: LifecycleCoroutineScope

-    private var cycleData: List<NetworkCycleChartData>? = null
+    private var cycleData: List<NetworkUsageData>? = null

    open fun init(template: NetworkTemplate) {
        this.template = template
@@ -70,7 +70,7 @@ open class DataUsageListAppsController(context: Context, preferenceKey: String)
        lifecycleScope = viewLifecycleOwner.lifecycleScope
    }

-    fun setCycleData(cycleData: List<NetworkCycleChartData>?) {
+    fun updateCycles(cycleData: List<NetworkUsageData>) {
        this.cycleData = cycleData
    }

--- a/src/com/android/settings/datausage/DataUsageListHeaderController.kt
+++ b/src/com/android/settings/datausage/DataUsageListHeaderController.kt
@@ -18,25 +18,39 @@ package com.android.settings.datausage

 import android.net.NetworkTemplate
 import android.os.Bundle
+import android.util.Range
 import android.view.View
 import android.view.accessibility.AccessibilityEvent
 import android.widget.AdapterView
 import android.widget.Spinner
 import androidx.annotation.OpenForTesting
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.LifecycleOwner
+import androidx.lifecycle.lifecycleScope
+import androidx.lifecycle.repeatOnLifecycle
 import com.android.settings.R
 import com.android.settings.core.SubSettingLauncher
-import com.android.settings.datausage.CycleAdapter.CycleItem
 import com.android.settings.datausage.CycleAdapter.SpinnerInterface
-import com.android.settingslib.net.NetworkCycleChartData
+import com.android.settings.datausage.lib.INetworkCycleDataRepository
+import com.android.settings.datausage.lib.NetworkCycleDataRepository
+import com.android.settings.datausage.lib.NetworkUsageData
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext

@OpenForTesting
 open class DataUsageListHeaderController(
    header: View,
    template: NetworkTemplate,
    sourceMetricsCategory: Int,
-    private val onItemSelected: (cycleItem: CycleItem, position: Int) -> Unit,
+    viewLifecycleOwner: LifecycleOwner,
+    private val onCyclesLoad: (usageDataList: List<NetworkUsageData>) -> Unit,
+    private val onItemSelected: (usageData: NetworkUsageData) -> Unit,
+    private val repository: INetworkCycleDataRepository =
+        NetworkCycleDataRepository(header.context, template),
 ) {
    private val context = header.context
+
    private val configureButton: View = header.requireViewById(R.id.filter_settings)
    private val cycleSpinner: Spinner = header.requireViewById(R.id.filter_spinner)
    private val cycleAdapter = CycleAdapter(context, object : SpinnerInterface {
@@ -50,13 +64,12 @@ open class DataUsageListHeaderController(
            cycleSpinner.setSelection(position)
        }
    })
+    private var cycles: List<NetworkUsageData> = emptyList()

    private val cycleListener = object : AdapterView.OnItemSelectedListener {
        override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
            if (0 <= position && position < cycleAdapter.count) {
-                cycleAdapter.getItem(position)?.let { cycleItem ->
-                    onItemSelected(cycleItem, position)
-                }
+                cycles.getOrNull(position)?.let(onItemSelected)
            }
        }

@@ -80,24 +93,32 @@ open class DataUsageListHeaderController(
        cycleSpinner.visibility = View.GONE
        cycleSpinner.accessibilityDelegate = object : View.AccessibilityDelegate() {
            override fun sendAccessibilityEvent(host: View, eventType: Int) {
-                if (eventType == AccessibilityEvent.TYPE_VIEW_SELECTED) {
-                    // Ignore TYPE_VIEW_SELECTED or TalkBack will speak for it at onResume.
-                    return
-                }
+                // Ignore TYPE_VIEW_SELECTED or TalkBack will speak for it at onResume.
+                if (eventType == AccessibilityEvent.TYPE_VIEW_SELECTED) return
                super.sendAccessibilityEvent(host, eventType)
            }
        }
+
+        viewLifecycleOwner.lifecycleScope.launch {
+            viewLifecycleOwner.repeatOnLifecycle(Lifecycle.State.STARTED) {
+                cycles = withContext(Dispatchers.Default) {
+                    repository.loadCycles()
+                }
+                updateCycleData()
+            }
+        }
    }

    open fun setConfigButtonVisible(visible: Boolean) {
        configureButton.visibility = if (visible) View.VISIBLE else View.GONE
    }

-    open fun updateCycleData(cycleData: List<NetworkCycleChartData>) {
+    private fun updateCycleData() {
        cycleSpinner.onItemSelectedListener = cycleListener
        // calculate policy cycles based on available data
        // generate cycle list based on policy and available history
-        cycleAdapter.updateCycleList(cycleData)
+        cycleAdapter.updateCycleList(cycles.map { Range(it.startTime, it.endTime) })
        cycleSpinner.visibility = View.VISIBLE
+        onCyclesLoad(cycles)
    }
 }
--- a/src/com/android/settings/datausage/lib/NetworkCycleChartData.kt
+++ b/src/com/android/settings/datausage/lib/NetworkCycleChartData.kt
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2023 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.datausage.lib
+
+import kotlin.time.Duration.Companion.days
+
+/**
+ * Usage data in a billing cycle with daily data for plotting the usage chart.
+ */
+data class NetworkCycleChartData(
+    val total: NetworkUsageData,
+    val dailyUsage: List<NetworkUsageData>,
+) {
+    companion object {
+        val BUCKET_DURATION = 1.days
+    }
+}
--- a/src/com/android/settings/datausage/lib/NetworkCycleDataRepository.kt
+++ b/src/com/android/settings/datausage/lib/NetworkCycleDataRepository.kt
@@ -0,0 +1,154 @@
+/*
+ * Copyright (C) 2023 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.datausage.lib
+
+import android.app.usage.NetworkStats
+import android.app.usage.NetworkStatsManager
+import android.content.Context
+import android.net.NetworkPolicy
+import android.net.NetworkPolicyManager
+import android.net.NetworkTemplate
+import android.text.format.DateUtils
+import android.util.Log
+import android.util.Range
+import androidx.annotation.VisibleForTesting
+import com.android.settingslib.NetworkPolicyEditor
+import kotlinx.coroutines.async
+import kotlinx.coroutines.awaitAll
+import kotlinx.coroutines.coroutineScope
+
+interface INetworkCycleDataRepository {
+    suspend fun loadCycles(): List<NetworkUsageData>
+    fun getPolicy(): NetworkPolicy?
+    suspend fun querySummary(startTime: Long, endTime: Long): NetworkCycleChartData?
+}
+
+class NetworkCycleDataRepository(
+    context: Context,
+    private val networkTemplate: NetworkTemplate,
+) : INetworkCycleDataRepository {
+    private val networkStatsManager = context.getSystemService(NetworkStatsManager::class.java)!!
+
+    private val policyManager = context.getSystemService(NetworkPolicyManager::class.java)!!
+
+    override suspend fun loadCycles(): List<NetworkUsageData> =
+        getCycles().queryUsage().filter { it.usage > 0 }
+
+    private fun getCycles(): List<Range<Long>> {
+        val policy = getPolicy() ?: return queryCyclesAsFourWeeks()
+        return policy.cycleIterator().asSequence().map {
+            Range(it.lower.toInstant().toEpochMilli(), it.upper.toInstant().toEpochMilli())
+        }.toList()
+    }
+
+    private fun queryCyclesAsFourWeeks(): List<Range<Long>> {
+        val timeRange = getTimeRange()
+        return reverseBucketRange(
+            startTime = timeRange.lower,
+            endTime = timeRange.upper,
+            bucketSize = DateUtils.WEEK_IN_MILLIS * 4,
+        )
+    }
+
+    @VisibleForTesting
+    fun getTimeRange(): Range<Long> = getTimeRangeOf(
+        networkStatsManager.queryDetailsForDevice(networkTemplate, Long.MIN_VALUE, Long.MAX_VALUE)
+    )
+
+    private fun getTimeRangeOf(stats: NetworkStats): Range<Long> {
+        var start = Long.MAX_VALUE
+        var end = Long.MIN_VALUE
+        val bucket = NetworkStats.Bucket()
+        while (stats.getNextBucket(bucket)) {
+            start = start.coerceAtMost(bucket.startTimeStamp)
+            end = end.coerceAtLeast(bucket.endTimeStamp)
+        }
+        return Range(start, end)
+    }
+
+    override fun getPolicy(): NetworkPolicy? =
+        with(NetworkPolicyEditor(policyManager)) {
+            read()
+            getPolicy(networkTemplate)
+        }
+
+    override suspend fun querySummary(startTime: Long, endTime: Long): NetworkCycleChartData? {
+        val usage = getUsage(startTime, endTime)
+        if (usage > 0L) {
+            return NetworkCycleChartData(
+                total = NetworkUsageData(startTime, endTime, usage),
+                dailyUsage = bucketRange(
+                    startTime = startTime,
+                    endTime = endTime,
+                    bucketSize = NetworkCycleChartData.BUCKET_DURATION.inWholeMilliseconds,
+                ).queryUsage(),
+            )
+        }
+        return null
+    }
+
+    private suspend fun List<Range<Long>>.queryUsage(): List<NetworkUsageData> = coroutineScope {
+        map { range ->
+            async {
+                NetworkUsageData(
+                    startTime = range.lower,
+                    endTime = range.upper,
+                    usage = getUsage(range.lower, range.upper),
+                )
+            }
+        }.awaitAll()
+    }
+
+    private fun bucketRange(startTime: Long, endTime: Long, bucketSize: Long): List<Range<Long>> {
+        val buckets = mutableListOf<Range<Long>>()
+        var currentStart = startTime
+        while (currentStart < endTime) {
+            val bucketEnd = currentStart + bucketSize
+            buckets += Range(currentStart, bucketEnd)
+            currentStart = bucketEnd
+        }
+        return buckets
+    }
+
+    private fun reverseBucketRange(
+        startTime: Long,
+        endTime: Long,
+        bucketSize: Long,
+    ): List<Range<Long>> {
+        val buckets = mutableListOf<Range<Long>>()
+        var currentEnd = endTime
+        while (currentEnd > startTime) {
+            val bucketStart = currentEnd - bucketSize
+            buckets += Range(bucketStart, currentEnd)
+            currentEnd = bucketStart
+        }
+        return buckets
+    }
+
+    private fun getUsage(start: Long, end: Long): Long = try {
+        networkStatsManager.querySummaryForDevice(networkTemplate, start, end).let {
+            it.rxBytes + it.txBytes
+        }
+    } catch (e: Exception) {
+        Log.e(TAG, "Exception querying network detail.", e)
+        0
+    }
+
+    companion object {
+        private const val TAG = "NetworkCycleDataRepository"
+    }
+}
--- a/src/com/android/settings/datausage/lib/NetworkUsageData.kt
+++ b/src/com/android/settings/datausage/lib/NetworkUsageData.kt
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2023 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.datausage.lib
+
+/**
+ * Base data structure representing usage data in a period.
+ */
+data class NetworkUsageData(
+    val startTime: Long,
+    val endTime: Long,
+    val usage: Long,
+)