diff --git a/packages/SystemUI/src/com/android/systemui/BatteryMeterView.java b/packages/SystemUI/src/com/android/systemui/BatteryMeterView.java
index fd2447b..2b31967 100644
--- a/packages/SystemUI/src/com/android/systemui/BatteryMeterView.java
+++ b/packages/SystemUI/src/com/android/systemui/BatteryMeterView.java
@@ -49,6 +49,7 @@
 import com.android.systemui.statusbar.policy.ConfigurationController.ConfigurationListener;
 import com.android.systemui.statusbar.policy.DarkIconDispatcher;
 import com.android.systemui.statusbar.policy.DarkIconDispatcher.DarkReceiver;
+import com.android.systemui.statusbar.policy.IconLogger;
 import com.android.systemui.tuner.TunerService;
 import com.android.systemui.tuner.TunerService.Tunable;
 
@@ -150,7 +151,9 @@
     public void onTuningChanged(String key, String newValue) {
         if (StatusBarIconController.ICON_BLACKLIST.equals(key)) {
             ArraySet<String> icons = StatusBarIconController.getIconBlacklist(newValue);
-            setVisibility(icons.contains(mSlotBattery) ? View.GONE : View.VISIBLE);
+            boolean hidden = icons.contains(mSlotBattery);
+            Dependency.get(IconLogger.class).onIconVisibility(mSlotBattery, !hidden);
+            setVisibility(hidden ? View.GONE : View.VISIBLE);
         }
     }
 
diff --git a/packages/SystemUI/src/com/android/systemui/Dependency.java b/packages/SystemUI/src/com/android/systemui/Dependency.java
index 49253ec..97a5962 100644
--- a/packages/SystemUI/src/com/android/systemui/Dependency.java
+++ b/packages/SystemUI/src/com/android/systemui/Dependency.java
@@ -66,6 +66,8 @@
 import com.android.systemui.statusbar.policy.FlashlightControllerImpl;
 import com.android.systemui.statusbar.policy.HotspotController;
 import com.android.systemui.statusbar.policy.HotspotControllerImpl;
+import com.android.systemui.statusbar.policy.IconLogger;
+import com.android.systemui.statusbar.policy.IconLoggerImpl;
 import com.android.systemui.statusbar.policy.KeyguardMonitor;
 import com.android.systemui.statusbar.policy.KeyguardMonitorImpl;
 import com.android.systemui.statusbar.policy.LocationController;
@@ -297,6 +299,9 @@
 
         mProviders.put(PowerUI.WarningsUI.class, () -> new PowerNotificationWarnings(mContext));
 
+        mProviders.put(IconLogger.class, () -> new IconLoggerImpl(mContext,
+                getDependency(BG_LOOPER), getDependency(MetricsLogger.class)));
+
         // Put all dependencies above here so the factory can override them if it wants.
         SystemUIFactory.getInstance().injectDependencies(mProviders, mContext);
     }
diff --git a/packages/SystemUI/src/com/android/systemui/qs/tileimpl/QSTileImpl.java b/packages/SystemUI/src/com/android/systemui/qs/tileimpl/QSTileImpl.java
index 672f2c2..8c04daf 100644
--- a/packages/SystemUI/src/com/android/systemui/qs/tileimpl/QSTileImpl.java
+++ b/packages/SystemUI/src/com/android/systemui/qs/tileimpl/QSTileImpl.java
@@ -17,12 +17,12 @@
 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.ACTION_QS_CLICK;
 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.ACTION_QS_LONG_PRESS;
 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.ACTION_QS_SECONDARY_CLICK;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_CONTEXT;
 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_QS_POSITION;
 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_QS_VALUE;
 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.TYPE_ACTION;
 import static com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
 
-import android.R.attr;
 import android.app.ActivityManager;
 import android.content.Context;
 import android.content.Intent;
@@ -45,6 +45,8 @@
 import com.android.systemui.plugins.qs.QSIconView;
 import com.android.systemui.plugins.qs.QSTile;
 import com.android.systemui.plugins.qs.QSTile.State;
+import com.android.systemui.qs.PagedTileLayout;
+import com.android.systemui.qs.PagedTileLayout.TilePage;
 import com.android.systemui.qs.QSHost;
 
 import java.util.ArrayList;
@@ -180,9 +182,19 @@
             logMaker.addTaggedData(FIELD_QS_VALUE, ((BooleanState) mState).value ? 1 : 0);
         }
         return logMaker.setSubtype(getMetricsCategory())
+                .addTaggedData(FIELD_CONTEXT, isFullQs())
                 .addTaggedData(FIELD_QS_POSITION, mHost.indexOf(mTileSpec));
     }
 
+    private int isFullQs() {
+        for (Object listener : mListeners) {
+            if (TilePage.class.equals(listener.getClass())) {
+                return 1;
+            }
+        }
+        return 0;
+    }
+
     public void showDetail(boolean show) {
         mHandler.obtainMessage(H.SHOW_DETAIL, show ? 1 : 0, 0).sendToTarget();
     }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/SignalClusterView.java b/packages/SystemUI/src/com/android/systemui/statusbar/SignalClusterView.java
index 25f3e25..759d2cf 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/SignalClusterView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/SignalClusterView.java
@@ -43,6 +43,7 @@
 import com.android.systemui.statusbar.phone.StatusBarIconController;
 import com.android.systemui.statusbar.policy.DarkIconDispatcher;
 import com.android.systemui.statusbar.policy.DarkIconDispatcher.DarkReceiver;
+import com.android.systemui.statusbar.policy.IconLogger;
 import com.android.systemui.statusbar.policy.NetworkController;
 import com.android.systemui.statusbar.policy.NetworkController.IconState;
 import com.android.systemui.statusbar.policy.NetworkControllerImpl;
@@ -65,6 +66,7 @@
     private static final String SLOT_MOBILE = "mobile";
     private static final String SLOT_WIFI = "wifi";
     private static final String SLOT_ETHERNET = "ethernet";
+    private static final String SLOT_VPN = "vpn";
 
     private final NetworkController mNetworkController;
     private final SecurityController mSecurityController;
@@ -117,6 +119,8 @@
     private boolean mActivityEnabled;
     private boolean mForceBlockWifi;
 
+    private final IconLogger mIconLogger = Dependency.get(IconLogger.class);
+
     public SignalClusterView(Context context) {
         this(context, null);
     }
@@ -447,14 +451,15 @@
     private void apply() {
         if (mWifiGroup == null) return;
 
-        mVpn.setVisibility(mVpnVisible ? View.VISIBLE : View.GONE);
         if (mVpnVisible) {
             if (mLastVpnIconId != mVpnIconId) {
                 setIconForView(mVpn, mVpnIconId);
                 mLastVpnIconId = mVpnIconId;
             }
+            mIconLogger.onIconShown(SLOT_VPN);
             mVpn.setVisibility(View.VISIBLE);
         } else {
+            mIconLogger.onIconHidden(SLOT_VPN);
             mVpn.setVisibility(View.GONE);
         }
         if (DEBUG) Log.d(TAG, String.format("vpn: %s", mVpnVisible ? "VISIBLE" : "GONE"));
@@ -466,8 +471,10 @@
                 mLastEthernetIconId = mEthernetIconId;
             }
             mEthernetGroup.setContentDescription(mEthernetDescription);
+            mIconLogger.onIconShown(SLOT_ETHERNET);
             mEthernetGroup.setVisibility(View.VISIBLE);
         } else {
+            mIconLogger.onIconHidden(SLOT_ETHERNET);
             mEthernetGroup.setVisibility(View.GONE);
         }
 
@@ -481,9 +488,11 @@
                 setIconForView(mWifiDark, mWifiStrengthId);
                 mLastWifiStrengthId = mWifiStrengthId;
             }
+            mIconLogger.onIconShown(SLOT_WIFI);
             mWifiGroup.setContentDescription(mWifiDescription);
             mWifiGroup.setVisibility(View.VISIBLE);
         } else {
+            mIconLogger.onIconHidden(SLOT_WIFI);
             mWifiGroup.setVisibility(View.GONE);
         }
 
@@ -505,6 +514,11 @@
                 }
             }
         }
+        if (anyMobileVisible) {
+            mIconLogger.onIconShown(SLOT_MOBILE);
+        } else {
+            mIconLogger.onIconHidden(SLOT_MOBILE);
+        }
 
         if (mIsAirplaneMode) {
             if (mLastAirplaneIconId != mAirplaneIconId) {
@@ -512,8 +526,10 @@
                 mLastAirplaneIconId = mAirplaneIconId;
             }
             mAirplane.setContentDescription(mAirplaneContentDescription);
+            mIconLogger.onIconShown(SLOT_AIRPLANE);
             mAirplane.setVisibility(View.VISIBLE);
         } else {
+            mIconLogger.onIconHidden(SLOT_AIRPLANE);
             mAirplane.setVisibility(View.GONE);
         }
 
@@ -529,7 +545,13 @@
             mWifiSignalSpacer.setVisibility(View.GONE);
         }
 
-        mNoSimsCombo.setVisibility(mNoSimsVisible ? View.VISIBLE : View.GONE);
+        if (mNoSimsVisible) {
+            mIconLogger.onIconShown(SLOT_MOBILE);
+            mNoSimsCombo.setVisibility(View.VISIBLE);
+        } else {
+            mIconLogger.onIconHidden(SLOT_MOBILE);
+            mNoSimsCombo.setVisibility(View.GONE);
+        }
 
         boolean anythingVisible = mNoSimsVisible || mWifiVisible || mIsAirplaneMode
                 || anyMobileVisible || mVpnVisible || mEthernetVisible;
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarIconControllerImpl.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarIconControllerImpl.java
index 70b92ad..68f8e06 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarIconControllerImpl.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarIconControllerImpl.java
@@ -20,12 +20,8 @@
 import android.graphics.drawable.Icon;
 import android.os.Bundle;
 import android.os.UserHandle;
-import android.text.TextUtils;
 import android.util.ArraySet;
-import android.view.Gravity;
-import android.view.View;
 import android.view.ViewGroup;
-import android.widget.ImageView;
 import android.widget.LinearLayout;
 
 import com.android.internal.statusbar.StatusBarIcon;
@@ -38,6 +34,7 @@
 import com.android.systemui.statusbar.policy.ConfigurationController;
 import com.android.systemui.statusbar.policy.ConfigurationController.ConfigurationListener;
 import com.android.systemui.statusbar.policy.DarkIconDispatcher;
+import com.android.systemui.statusbar.policy.IconLogger;
 import com.android.systemui.tuner.TunerService;
 import com.android.systemui.tuner.TunerService.Tunable;
 
@@ -61,6 +58,7 @@
     private final ArrayList<IconManager> mIconGroups = new ArrayList<>();
 
     private final ArraySet<String> mIconBlacklist = new ArraySet<>();
+    private final IconLogger mIconLogger = Dependency.get(IconLogger.class);
 
     public StatusBarIconControllerImpl(Context context) {
         super(context.getResources().getStringArray(
@@ -122,6 +120,7 @@
         int viewIndex = getViewIndex(index);
         boolean blocked = mIconBlacklist.contains(slot);
 
+        mIconLogger.onIconVisibility(getSlot(index), icon.visible);
         mIconGroups.forEach(l -> l.onIconAdded(viewIndex, slot, blocked, icon));
     }
 
@@ -174,6 +173,7 @@
         if (getIcon(index) == null) {
             return;
         }
+        mIconLogger.onIconHidden(getSlot(index));
         super.removeIcon(index);
         int viewIndex = getViewIndex(index);
         mIconGroups.forEach(l -> l.onRemoveIcon(viewIndex));
@@ -196,6 +196,7 @@
 
     private void handleSet(int index, StatusBarIcon icon) {
         int viewIndex = getViewIndex(index);
+        mIconLogger.onIconVisibility(getSlot(index), icon.visible);
         mIconGroups.forEach(l -> l.onSetIcon(viewIndex, icon));
     }
 
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/policy/Clock.java b/packages/SystemUI/src/com/android/systemui/statusbar/policy/Clock.java
index f0af77d..4c92d01 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/policy/Clock.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/policy/Clock.java
@@ -24,7 +24,6 @@
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
-import android.content.res.Configuration;
 import android.content.res.TypedArray;
 import android.graphics.Rect;
 import android.os.Bundle;
@@ -193,8 +192,9 @@
     }
 
     private void updateClockVisibility() {
-        int visibility = (mClockVisibleByPolicy && mClockVisibleByUser)
-                ? View.VISIBLE : View.GONE;
+        boolean visible = mClockVisibleByPolicy && mClockVisibleByUser;
+        Dependency.get(IconLogger.class).onIconVisibility("clock", visible);
+        int visibility = visible ? View.VISIBLE : View.GONE;
         setVisibility(visibility);
     }
 
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/policy/IconLogger.java b/packages/SystemUI/src/com/android/systemui/statusbar/policy/IconLogger.java
new file mode 100644
index 0000000..710e1df
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/policy/IconLogger.java
@@ -0,0 +1,29 @@
+/*
+ * 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.systemui.statusbar.policy;
+
+public interface IconLogger {
+
+    void onIconShown(String tag);
+    void onIconHidden(String tag);
+
+    default void onIconVisibility(String tag, boolean visible) {
+        if (visible) {
+            onIconShown(tag);
+        } else {
+            onIconHidden(tag);
+        }
+    }
+}
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/policy/IconLoggerImpl.java b/packages/SystemUI/src/com/android/systemui/statusbar/policy/IconLoggerImpl.java
new file mode 100644
index 0000000..0c201c3
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/policy/IconLoggerImpl.java
@@ -0,0 +1,108 @@
+/*
+ * 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.systemui.statusbar.policy;
+
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_NUM_STATUS_ICONS;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_STATUS_ICONS;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.STATUS_BAR_ICONS_CHANGED;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.TYPE_ACTION;
+
+import android.content.Context;
+import android.metrics.LogMaker;
+import android.os.Handler;
+import android.os.Looper;
+import android.support.annotation.VisibleForTesting;
+import android.util.ArraySet;
+
+import com.android.internal.logging.MetricsLogger;
+
+import java.util.Arrays;
+import java.util.List;
+
+public class IconLoggerImpl implements IconLogger {
+
+    // Minimum ms between log statements.
+    // NonFinalForTesting
+    @VisibleForTesting
+    protected static long MIN_LOG_INTERVAL = 1000;
+
+    private final Context mContext;
+    private final Handler mHandler;
+    private final MetricsLogger mLogger;
+    private final ArraySet<String> mIcons = new ArraySet<>();
+    private final List<String> mIconIndex;
+    private long mLastLog = System.currentTimeMillis();
+
+    public IconLoggerImpl(Context context, Looper bgLooper, MetricsLogger logger) {
+        mContext = context;
+        mHandler = new Handler(bgLooper);
+        mLogger = logger;
+        String[] icons = mContext.getResources().getStringArray(
+                com.android.internal.R.array.config_statusBarIcons);
+        mIconIndex = Arrays.asList(icons);
+        doLog();
+    }
+
+    @Override
+    public void onIconShown(String tag) {
+        synchronized (mIcons) {
+            if (mIcons.contains(tag)) return;
+            mIcons.add(tag);
+        }
+        if (!mHandler.hasCallbacks(mLog)) {
+            mHandler.postDelayed(mLog, MIN_LOG_INTERVAL);
+        }
+    }
+
+    @Override
+    public void onIconHidden(String tag) {
+        synchronized (mIcons) {
+            if (!mIcons.contains(tag)) return;
+            mIcons.remove(tag);
+        }
+        if (!mHandler.hasCallbacks(mLog)) {
+            mHandler.postDelayed(mLog, MIN_LOG_INTERVAL);
+        }
+    }
+
+    private void doLog() {
+        long time = System.currentTimeMillis();
+        long timeSinceLastLog = time - mLastLog;
+        mLastLog = time;
+
+        ArraySet<String> icons;
+        synchronized (mIcons) {
+            icons = new ArraySet<>(mIcons);
+        }
+        mLogger.write(new LogMaker(STATUS_BAR_ICONS_CHANGED)
+                .setType(TYPE_ACTION)
+                .setLatency(timeSinceLastLog)
+                .addTaggedData(FIELD_NUM_STATUS_ICONS, icons.size())
+                .addTaggedData(FIELD_STATUS_ICONS, getBitField(icons)));
+    }
+
+    private int getBitField(ArraySet<String> icons) {
+        int iconsVisible = 0;
+        for (String icon : icons) {
+            int index = mIconIndex.indexOf(icon);
+            if (index >= 0) {
+                iconsVisible |= (1 << index);
+            }
+        }
+        return iconsVisible;
+    }
+
+    private final Runnable mLog = this::doLog;
+}
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/IconLoggerImplTest.java b/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/IconLoggerImplTest.java
new file mode 100644
index 0000000..66a8561
--- /dev/null
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/IconLoggerImplTest.java
@@ -0,0 +1,175 @@
+/*
+ * 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.systemui.statusbar.policy;
+
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_NUM_STATUS_ICONS;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_STATUS_ICONS;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent
+        .NOTIFICATION_SINCE_CREATE_MILLIS;
+
+import static org.junit.Assert.*;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.argThat;
+import static org.mockito.Mockito.clearInvocations;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import static java.lang.Thread.sleep;
+
+import android.metrics.LogMaker;
+import android.testing.AndroidTestingRunner;
+import android.testing.TestableLooper;
+import android.testing.TestableLooper.MessageHandler;
+import android.testing.TestableLooper.RunWithLooper;
+import android.util.Log;
+
+import com.android.internal.logging.MetricsLogger;
+import com.android.systemui.SysuiTestCase;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentMatcher;
+
+@RunWith(AndroidTestingRunner.class)
+@RunWithLooper
+public class IconLoggerImplTest extends SysuiTestCase {
+
+    private MetricsLogger mMetricsLogger;
+    private IconLoggerImpl mIconLogger;
+    private TestableLooper mTestableLooper;
+    private MessageHandler mMessageHandler;
+
+    @Before
+    public void setup() {
+        IconLoggerImpl.MIN_LOG_INTERVAL = 5; // Low interval for testing
+        mMetricsLogger = mock(MetricsLogger.class);
+        mTestableLooper = TestableLooper.get(this);
+        mMessageHandler = mock(MessageHandler.class);
+        mTestableLooper.setMessageHandler(mMessageHandler);
+        String[] iconArray = new String[] {
+                "test_icon_1",
+                "test_icon_2",
+        };
+        mContext.getOrCreateTestableResources().addOverride(
+                com.android.internal.R.array.config_statusBarIcons, iconArray);
+        mIconLogger = new IconLoggerImpl(mContext, mTestableLooper.getLooper(), mMetricsLogger);
+        when(mMessageHandler.onMessageHandled(any())).thenReturn(true);
+        clearInvocations(mMetricsLogger);
+    }
+
+    @Test
+    public void testIconShown() throws InterruptedException {
+        // Should only get one message, for the same icon shown twice.
+        mIconLogger.onIconShown("test_icon_2");
+        mIconLogger.onIconShown("test_icon_2");
+
+        // There should be some delay before execute.
+        mTestableLooper.processAllMessages();
+        verify(mMessageHandler, never()).onMessageHandled(any());
+
+        sleep(10);
+        mTestableLooper.processAllMessages();
+        verify(mMessageHandler, times(1)).onMessageHandled(any());
+    }
+
+    @Test
+    public void testIconHidden() throws InterruptedException {
+        // Add the icon so that it can be removed.
+        mIconLogger.onIconShown("test_icon_2");
+        sleep(10);
+        mTestableLooper.processAllMessages();
+        clearInvocations(mMessageHandler);
+
+        // Should only get one message, for the same icon shown twice.
+        mIconLogger.onIconHidden("test_icon_2");
+        mIconLogger.onIconHidden("test_icon_2");
+
+        // There should be some delay before execute.
+        mTestableLooper.processAllMessages();
+        verify(mMessageHandler, never()).onMessageHandled(any());
+
+        sleep(10);
+        mTestableLooper.processAllMessages();
+        verify(mMessageHandler, times(1)).onMessageHandled(any());
+    }
+
+    @Test
+    public void testLog() throws InterruptedException {
+        mIconLogger.onIconShown("test_icon_2");
+        sleep(10);
+        mTestableLooper.processAllMessages();
+
+        verify(mMetricsLogger).write(argThat(maker -> {
+            if (IconLoggerImpl.MIN_LOG_INTERVAL >
+                    (long) maker.getTaggedData(NOTIFICATION_SINCE_CREATE_MILLIS)) {
+                Log.e("IconLoggerImplTest", "Invalid latency "
+                        + maker.getTaggedData(NOTIFICATION_SINCE_CREATE_MILLIS));
+                return false;
+            }
+            if (1 != (int) maker.getTaggedData(FIELD_NUM_STATUS_ICONS)) {
+                Log.e("IconLoggerImplTest", "Invalid icon count "
+                        + maker.getTaggedData(FIELD_NUM_STATUS_ICONS));
+                return false;
+            }
+            return true;
+        }));
+    }
+
+    @Test
+    public void testBitField() throws InterruptedException {
+        mIconLogger.onIconShown("test_icon_2");
+        sleep(10);
+        mTestableLooper.processAllMessages();
+
+        verify(mMetricsLogger).write(argThat(maker -> {
+            if ((1 << 1) != (int) maker.getTaggedData(FIELD_STATUS_ICONS)) {
+                Log.e("IconLoggerImplTest", "Invalid bitfield " + Integer.toHexString(
+                        (Integer) maker.getTaggedData(FIELD_NUM_STATUS_ICONS)));
+                return false;
+            }
+            return true;
+        }));
+
+        mIconLogger.onIconShown("test_icon_1");
+        sleep(10);
+        mTestableLooper.processAllMessages();
+
+        verify(mMetricsLogger).write(argThat(maker -> {
+            if ((1 << 1 | 1 << 0) != (int) maker.getTaggedData(FIELD_STATUS_ICONS)) {
+                Log.e("IconLoggerImplTest", "Invalid bitfield " + Integer.toHexString(
+                        (Integer) maker.getTaggedData(FIELD_NUM_STATUS_ICONS)));
+                return false;
+            }
+            return true;
+        }));
+
+        mIconLogger.onIconHidden("test_icon_2");
+        sleep(10);
+        mTestableLooper.processAllMessages();
+
+        verify(mMetricsLogger).write(argThat(maker -> {
+            if ((1 << 0) != (int) maker.getTaggedData(FIELD_STATUS_ICONS)) {
+                Log.e("IconLoggerImplTest", "Invalid bitfield " + Integer.toHexString(
+                        (Integer) maker.getTaggedData(FIELD_STATUS_ICONS)));
+                return false;
+            }
+            return true;
+        }));
+    }
+}
\ No newline at end of file