diff --git a/src/com/android/launcher3/LauncherModel.java b/src/com/android/launcher3/LauncherModel.java
index 845fdbf..6a78367 100644
--- a/src/com/android/launcher3/LauncherModel.java
+++ b/src/com/android/launcher3/LauncherModel.java
@@ -128,6 +128,11 @@
     // our monitoring of the package manager provides all updates and we never
     // need to do a requery. This is only ever touched from the loader thread.
     private boolean mModelLoaded;
+    public boolean isModelLoaded() {
+        synchronized (mLock) {
+            return mModelLoaded && mLoaderTask == null;
+        }
+    }
 
     /**
      * Set of runnables to be called on the background thread after the workspace binding
diff --git a/src/com/android/launcher3/LauncherProvider.java b/src/com/android/launcher3/LauncherProvider.java
index e250b3f..e6d7181 100644
--- a/src/com/android/launcher3/LauncherProvider.java
+++ b/src/com/android/launcher3/LauncherProvider.java
@@ -47,6 +47,7 @@
 import android.os.UserManager;
 import android.text.TextUtils;
 import android.util.Log;
+import android.view.ViewGroup;
 
 import com.android.launcher3.AutoInstallsLayout.LayoutParserCallback;
 import com.android.launcher3.LauncherSettings.Favorites;
@@ -63,6 +64,8 @@
 import com.android.launcher3.util.Preconditions;
 import com.android.launcher3.util.Thunk;
 
+import java.io.FileDescriptor;
+import java.io.PrintWriter;
 import java.net.URISyntaxException;
 import java.util.ArrayList;
 import java.util.Collections;
@@ -85,6 +88,18 @@
 
     protected DatabaseHelper mOpenHelper;
 
+    /**
+     * $ adb shell dumpsys activity provider com.android.launcher3
+     */
+    @Override
+    public void dump(FileDescriptor fd, PrintWriter writer, String[] args) {
+        LauncherAppState appState = LauncherAppState.getInstanceNoCreate();
+        if (appState == null || !appState.getModel().isModelLoaded()) {
+            return;
+        }
+        appState.getModel().dumpState("", fd, writer, args);
+    }
+
     @Override
     public boolean onCreate() {
         if (ProviderConfig.IS_DOGFOOD_BUILD) {
diff --git a/src/com/android/launcher3/logging/DumpTargetWrapper.java b/src/com/android/launcher3/logging/DumpTargetWrapper.java
new file mode 100644
index 0000000..2646a22
--- /dev/null
+++ b/src/com/android/launcher3/logging/DumpTargetWrapper.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.launcher3.logging;
+
+import android.os.Process;
+import android.text.TextUtils;
+
+import com.android.launcher3.ItemInfo;
+import com.android.launcher3.LauncherSettings;
+import com.android.launcher3.model.nano.LauncherDumpProto;
+import com.android.launcher3.model.nano.LauncherDumpProto.ContainerType;
+import com.android.launcher3.model.nano.LauncherDumpProto.DumpTarget;
+import com.android.launcher3.model.nano.LauncherDumpProto.ItemType;
+import com.android.launcher3.model.nano.LauncherDumpProto.UserType;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * This class can be used when proto definition doesn't support nesting.
+ */
+public class DumpTargetWrapper {
+    DumpTarget node;
+    ArrayList<DumpTargetWrapper> children;
+
+    public DumpTargetWrapper() {
+        children = new ArrayList<>();
+    }
+
+    public DumpTargetWrapper(DumpTarget t) {
+        this();
+        node = t;
+    }
+
+    public DumpTargetWrapper(int containerType, int id) {
+        this();
+        node = newContainerTarget(containerType, id);
+    }
+
+    public DumpTargetWrapper(ItemInfo info) {
+        this();
+        node = newItemTarget(info);
+    }
+
+    public DumpTarget getDumpTarget() {
+        return node;
+    }
+
+    public void add(DumpTargetWrapper child) {
+        children.add(child);
+    }
+
+    public List<DumpTarget> getFlattenedList() {
+        ArrayList<DumpTarget> list = new ArrayList<>();
+        list.add(node);
+        if (!children.isEmpty()) {
+            for(DumpTargetWrapper t: children) {
+                list.addAll(t.getFlattenedList());
+            }
+            list.add(node); // add a delimiter empty object
+        }
+        return list;
+    }
+    public DumpTarget newItemTarget(ItemInfo info) {
+        DumpTarget dt = new DumpTarget();
+        dt.type = DumpTarget.Type.ITEM;
+
+        switch (info.itemType) {
+            case LauncherSettings.Favorites.ITEM_TYPE_APPLICATION:
+                dt.itemType = ItemType.APP_ICON;
+                break;
+            case LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT:
+                dt.itemType = ItemType.UNKNOWN_ITEMTYPE;
+                break;
+            case LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET:
+                dt.itemType = ItemType.WIDGET;
+                break;
+            case LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT:
+                dt.itemType = ItemType.SHORTCUT;
+                break;
+        }
+        return dt;
+    }
+
+    public DumpTarget newContainerTarget(int type, int id) {
+        DumpTarget dt = new DumpTarget();
+        dt.type = DumpTarget.Type.CONTAINER;
+        dt.containerType = type;
+        dt.pageId = id;
+        return dt;
+    }
+
+    public static String getDumpTargetStr(DumpTarget t) {
+        if (t == null){
+            return "";
+        }
+        switch (t.type) {
+            case LauncherDumpProto.DumpTarget.Type.ITEM:
+                return getItemStr(t);
+            case LauncherDumpProto.DumpTarget.Type.CONTAINER:
+                String str = LoggerUtils.getFieldName(t.containerType, ContainerType.class);
+                if (t.containerType == ContainerType.WORKSPACE) {
+                    str += " id=" + t.pageId;
+                } else if (t.containerType == ContainerType.FOLDER) {
+                    str += " grid(" + t.gridX + "," + t.gridY+ ")";
+                }
+                return str;
+            default:
+                return "UNKNOWN TARGET TYPE";
+        }
+    }
+
+    private static String getItemStr(DumpTarget t) {
+        String typeStr = LoggerUtils.getFieldName(t.itemType, ItemType.class);
+        if (!TextUtils.isEmpty(t.packageName)) {
+            typeStr += ", package=" + t.packageName;
+        }
+        if (!TextUtils.isEmpty(t.component)) {
+            typeStr += ", component=" + t.component;
+        }
+        return typeStr + ", grid(" + t.gridX + "," + t.gridY + "), span(" + t.spanX + "," + t.spanY
+                + "), pageIdx=" + t.pageId + " user=" + t.userType;
+    }
+
+    public DumpTarget writeToDumpTarget(ItemInfo info) {
+        node.component = info.getTargetComponent() == null? "":
+                info.getTargetComponent().flattenToString();
+        node.packageName = info.getIntent() == null? "": info.getIntent().getPackage();
+        node.gridX = info.cellX;
+        node.gridY = info.cellY;
+        node.spanX = info.spanX;
+        node.spanY = info.spanY;
+        node.userType = (info.user.equals(Process.myUserHandle()))? UserType.DEFAULT : UserType.WORK;
+        return node;
+    }
+}
diff --git a/src/com/android/launcher3/logging/LoggerUtils.java b/src/com/android/launcher3/logging/LoggerUtils.java
index c13e8b3..499fdc7 100644
--- a/src/com/android/launcher3/logging/LoggerUtils.java
+++ b/src/com/android/launcher3/logging/LoggerUtils.java
@@ -1,5 +1,21 @@
+/*
+ * Copyright (C) 2016 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.launcher3.logging;
 
+import android.text.TextUtils;
 import android.util.ArrayMap;
 import android.util.SparseArray;
 import android.view.View;
@@ -27,7 +43,7 @@
     private static final ArrayMap<Class, SparseArray<String>> sNameCache = new ArrayMap<>();
     private static final String UNKNOWN = "UNKNOWN";
 
-    private static String getFieldName(int value, Class c) {
+    public static String getFieldName(int value, Class c) {
         SparseArray<String> cache;
         synchronized (sNameCache) {
             cache = sNameCache.get(c);
@@ -68,8 +84,13 @@
             case Target.Type.CONTROL:
                 return getFieldName(t.controlType, ControlType.class);
             case Target.Type.CONTAINER:
-                return getFieldName(t.containerType, ContainerType.class)
-                        + " id=" + t.pageIndex;
+                String str = getFieldName(t.containerType, ContainerType.class);
+                if (t.containerType == ContainerType.WORKSPACE) {
+                    str += " id=" + t.pageIndex;
+                } else if (t.containerType == ContainerType.FOLDER) {
+                    str += " grid(" + t.gridX + "," + t.gridY+ ")";
+                }
+                return str;
             default:
                 return "UNKNOWN TARGET TYPE";
         }
@@ -86,10 +107,8 @@
         if (t.intentHash != 0) {
             typeStr += ", intentHash=" + t.intentHash;
         }
-        if (t.spanX != 0) {
-            typeStr += ", spanX=" + t.spanX;
-        }
-        return typeStr + ", grid=(" + t.gridX + "," + t.gridY + "), id=" + t.pageIndex;
+        return typeStr + ", grid(" + t.gridX + "," + t.gridY + "), span(" + t.spanX + "," + t.spanY
+                + "), pageIdx=" + t.pageIndex;
     }
 
     public static Target newItemTarget(View v) {
diff --git a/src/com/android/launcher3/model/BgDataModel.java b/src/com/android/launcher3/model/BgDataModel.java
index 6b64087..0e73ca6 100644
--- a/src/com/android/launcher3/model/BgDataModel.java
+++ b/src/com/android/launcher3/model/BgDataModel.java
@@ -24,19 +24,27 @@
 import com.android.launcher3.FolderInfo;
 import com.android.launcher3.InstallShortcutReceiver;
 import com.android.launcher3.ItemInfo;
-import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherAppWidgetInfo;
 import com.android.launcher3.LauncherSettings;
 import com.android.launcher3.ShortcutInfo;
 import com.android.launcher3.config.ProviderConfig;
+import com.android.launcher3.logging.LoggerUtils;
+import com.android.launcher3.logging.DumpTargetWrapper;
 import com.android.launcher3.shortcuts.DeepShortcutManager;
 import com.android.launcher3.shortcuts.ShortcutInfoCompat;
 import com.android.launcher3.shortcuts.ShortcutKey;
+import com.android.launcher3.model.nano.LauncherDumpProto;
+import com.android.launcher3.model.nano.LauncherDumpProto.ContainerType;
+import com.android.launcher3.model.nano.LauncherDumpProto.DumpTarget;
+import com.android.launcher3.model.nano.LauncherDumpProto.ItemType;
 import com.android.launcher3.util.ComponentKey;
 import com.android.launcher3.util.LongArrayMap;
 import com.android.launcher3.util.MultiHashMap;
+import com.google.protobuf.nano.MessageNano;
 
 import java.io.FileDescriptor;
+import java.io.FileOutputStream;
+import java.io.IOException;
 import java.io.PrintWriter;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -102,21 +110,31 @@
         deepShortcutMap.clear();
     }
 
-    // TODO: current dump is very cryptic and hard to understand. Make it more legible.
-    public synchronized void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) {
-        writer.println(prefix + "Data Model:");
-        for (int i = 0; i < workspaceScreens.size(); i++) {
-            writer.println(prefix + "\tIndex of workspaceScreens:" + workspaceScreens.get(i).toString());
+     public synchronized void dump(String prefix, FileDescriptor fd, PrintWriter writer,
+             String[] args) {
+        if (args.length > 0 && TextUtils.equals(args[0], "--proto")) {
+            dumpProto(prefix, fd, writer, args);
+            return;
         }
+        writer.println(prefix + "Data Model:");
+        writer.print(prefix + " ---- workspace screens: ");
+        for (int i = 0; i < workspaceScreens.size(); i++) {
+            writer.print(" " + workspaceScreens.get(i).toString());
+        }
+        writer.println();
+        writer.println(prefix + " ---- workspace items ");
         for (int i = 0; i < workspaceItems.size(); i++) {
             writer.println(prefix + '\t' + workspaceItems.get(i).toString());
         }
+        writer.println(prefix + " ---- appwidget items ");
         for (int i = 0; i < appWidgets.size(); i++) {
             writer.println(prefix + '\t' + appWidgets.get(i).toString());
         }
+        writer.println(prefix + " ---- folder items ");
         for (int i = 0; i< folders.size(); i++) {
             writer.println(prefix + '\t' + folders.valueAt(i).toString());
         }
+        writer.println(prefix + " ---- items id map ");
         for (int i = 0; i< itemsIdMap.size(); i++) {
             writer.println(prefix + '\t' + itemsIdMap.valueAt(i).toString());
         }
@@ -133,6 +151,88 @@
         }
     }
 
+    private synchronized void dumpProto(String prefix, FileDescriptor fd, PrintWriter writer,
+            String[] args) {
+
+        // Add top parent nodes. (L1)
+        DumpTargetWrapper hotseat = new DumpTargetWrapper(ContainerType.HOTSEAT, 0);
+        LongArrayMap<DumpTargetWrapper> workspaces = new LongArrayMap<>();
+        for (int i = 0; i < workspaceScreens.size(); i++) {
+            workspaces.put(new Long(workspaceScreens.get(i)),
+                    new DumpTargetWrapper(ContainerType.WORKSPACE, i));
+        }
+        DumpTargetWrapper dtw;
+        // Add non leaf / non top nodes (L2)
+        for (int i = 0; i < folders.size(); i++) {
+            FolderInfo fInfo = folders.valueAt(i);
+            dtw = new DumpTargetWrapper(ContainerType.FOLDER, folders.size());
+            dtw.writeToDumpTarget(fInfo);
+            for(ShortcutInfo sInfo: fInfo.contents) {
+                DumpTargetWrapper child = new DumpTargetWrapper(sInfo);
+                child.writeToDumpTarget(sInfo);
+                dtw.add(child);
+            }
+            if (fInfo.container == LauncherSettings.Favorites.CONTAINER_HOTSEAT) {
+                hotseat.add(dtw);
+            } else if (fInfo.container == LauncherSettings.Favorites.CONTAINER_DESKTOP) {
+                workspaces.get(new Long(fInfo.screenId)).add(dtw);
+            }
+        }
+        // Add leaf nodes (L3): *Info
+        for (int i = 0; i < workspaceItems.size(); i++) {
+            ItemInfo info = workspaceItems.get(i);
+            if (info instanceof FolderInfo) {
+                continue;
+            }
+            dtw = new DumpTargetWrapper(info);
+            dtw.writeToDumpTarget(info);
+            if (info.container == LauncherSettings.Favorites.CONTAINER_HOTSEAT) {
+                hotseat.add(dtw);
+            } else if (info.container == LauncherSettings.Favorites.CONTAINER_DESKTOP) {
+                workspaces.get(new Long(info.screenId)).add(dtw);
+            }
+        }
+        for (int i = 0; i < appWidgets.size(); i++) {
+            ItemInfo info = appWidgets.get(i);
+            dtw = new DumpTargetWrapper(info);
+            dtw.writeToDumpTarget(info);
+            if (info.container == LauncherSettings.Favorites.CONTAINER_HOTSEAT) {
+                hotseat.add(dtw);
+            } else if (info.container == LauncherSettings.Favorites.CONTAINER_DESKTOP) {
+                workspaces.get(new Long(info.screenId)).add(dtw);
+            }
+        }
+
+
+        // Traverse target wrapper
+        ArrayList<DumpTarget> targetList = new ArrayList<>();
+        targetList.addAll(hotseat.getFlattenedList());
+        for (int i = 0; i < workspaces.size(); i++) {
+            targetList.addAll(workspaces.valueAt(i).getFlattenedList());
+        }
+
+        if (args.length > 1 && TextUtils.equals(args[1], "--debug")) {
+            for (int i = 0; i < targetList.size(); i++) {
+                writer.println(prefix + DumpTargetWrapper.getDumpTargetStr(targetList.get(i)));
+            }
+            return;
+        } else {
+            LauncherDumpProto.LauncherImpression proto = new LauncherDumpProto.LauncherImpression();
+            proto.targets = new DumpTarget[targetList.size()];
+            for (int i = 0; i < targetList.size(); i++) {
+                proto.targets[i] = targetList.get(i);
+            }
+            FileOutputStream fos = new FileOutputStream(fd);
+            try {
+
+                fos.write(MessageNano.toByteArray(proto));
+                Log.d(TAG, MessageNano.toByteArray(proto).length + "Bytes");
+            } catch (IOException e) {
+                Log.e(TAG, "Exception writing dumpsys --proto", e);
+            }
+        }
+    }
+
     public synchronized void removeItem(Context context, ItemInfo... items) {
         removeItem(context, Arrays.asList(items));
     }