Demonstrate some ideas for level list drawable [DO NOT SUBMIT]

chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
index c11c737b89826366e5068cee28ac683b9438d488..237d0d725ac7f7f11844b5187181f6d09f4ad660 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
@@ -17,6 +17,7 @@ import android.graphics.Color;
 import android.graphics.Rect;
 import android.graphics.drawable.ColorDrawable;
 import android.graphics.drawable.Drawable;
+import android.graphics.drawable.LevelListDrawable;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
@@ -51,6 +52,9 @@ import org.chromium.base.metrics.RecordUserAction;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.IntentHandler.IntentHandlerDelegate;
 import org.chromium.chrome.browser.IntentHandler.TabOpenType;
+import org.chromium.chrome.browser.ItemChooserDialog.ItemChooserLabels;
+import org.chromium.chrome.browser.ItemChooserDialog.ItemChooserRow;
+import org.chromium.chrome.browser.ItemChooserDialog.ItemSelectedCallback;
 import org.chromium.chrome.browser.appmenu.AppMenu;
 import org.chromium.chrome.browser.appmenu.AppMenuHandler;
 import org.chromium.chrome.browser.appmenu.AppMenuObserver;
@@ -1546,6 +1550,8 @@ public abstract class ChromeActivity extends AsyncInitializationActivity
         }
     }
 
+    ItemChooserDialog dialog;
+
     /**
      * Handles menu item selection and keyboard shortcuts.
      *
@@ -1578,8 +1584,24 @@ public abstract class ChromeActivity extends AsyncInitializationActivity
                 RecordUserAction.record("MobileTabClobbered");
             }
         } else if (id == R.id.bookmark_this_page_id) {
-            addOrEditBookmark(currentTab);
-            RecordUserAction.record("MobileMenuAddToBookmarks");
+            final LevelListDrawable lld = new LevelListDrawable();
+            lld.addLevel(0, 0, ApiCompatibilityUtils.getDrawable(getResources(), R.drawable.star_gray));
+            lld.addLevel(0, 1, ApiCompatibilityUtils.getDrawable(getResources(), R.drawable.star_green));
+
+            final ItemChooserRow row1 = new ItemChooserRow("1", "row 1", lld);
+            final ItemChooserRow row2 = new ItemChooserRow("2", "row 2", lld);
+            dialog = new ItemChooserDialog(this, new ItemSelectedCallback() {
+                @Override
+                public void onItemSelected(String id) {
+                    // This should be very cheap, because actual drawables are shared by the same constant state.

[ortuno, 2016/09/27 07:02:30]

Just to confirm. We are updating the rows approximately 3000 times in a 10
second period. That's 3000 new Drawables that we will be creating. Is it still
OK to do this?

+                    Drawable d = lld.getConstantState().newDrawable();
+                    d.setLevel(1);

[ortuno, 2016/09/27 07:02:30]

I'm not sure if I got the code wrong but for some reason when I do the following
the icon shows the level 0 image:

Drawable d = lld.getConstantState().newDrawable();
d.setLevel(1);
icon.setImageDrawable(d);

Whereas if I do the following, the icon displays the right image:

Drawable d = lld.getConstantState().newDrawable();
icon.setImageDrawable(d);
d.setLevel(1);

What am I missing?

+                    ItemChooserRow row1_updated = new ItemChooserRow("1", "row 1-updated", d);
+                    dialog.addOrUpdateItem(row1_updated);
+                }
+            }, new ItemChooserLabels("title", "searching", "noneFound", "statusActive", "statusIdleNoneFound", "statusIdleSomeFound", "positiveButton"));
+            dialog.addOrUpdateItem(row1);
+            dialog.addOrUpdateItem(row2);
         } else if (id == R.id.offline_page_id) {
             DownloadUtils.downloadOfflinePage(this, currentTab);
             RecordUserAction.record("MobileMenuDownloadPage");