Remove ChooserListAdapter notifyDataSetChange throttling

ChooserListAdapter notifyDataSetChange throttling period has been,
practically, reduced to 0 and this change removes the logic completely.
The remaining ChooserHandler's message turned into posting on the UI
thread and thus ChooserHandler is also removed.

Safety Check
All ChooserListAdapter#notifyDataSetChanged invocations I've found
(posted below) are originated by some posting on the main thread i.e.
not initiated from a view binding in the adapter.

Invocations
 - ChooserActivity.onHandlePackageChanged (and
 - ResolverActivity.onHandlePackageChanged)
 - ChooserListAdapter.onListRebuilt
 - ChooserListAdapter.updateAlphabeticalList
 - ChooserListAdapter.addServiceResults
 - ChooserListAdapter.completeServiceTargetLoading
 - ChooserListAdapter$<sorting task> from #createSortingTask
 - ChooserListAdapter.LoadDirectShareIconTask
 - ResolverListAdapter.LoadIconTask
 - ResolverListAdapter.LoadLabelTask

Fix: 257285237
Test: manual test
Test: atest IntentResolverUnitTests
Change-Id: I70eeababa2fa684f0a160ff6ed9ab0900e3c9648

2 files changed, 42 insertions, 128 deletions

diff --git a/java/src/com/android/intentresolver/ChooserActivity.java b/java/src/com/android/intentresolver/ChooserActivity.java
index 6735ab4e..53d3829e 100644
--- a/java/src/com/android/intentresolver/ChooserActivity.java
+++ b/java/src/com/android/intentresolver/ChooserActivity.java
@@ -88,7 +88,6 @@ import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.util.HashedStringCache;
 import android.util.Log;
-import android.util.Pair;
 import android.util.PluralsMessageFormatter;
 import android.util.Size;
 import android.util.Slog;
@@ -111,6 +110,7 @@ import android.widget.ImageView;
 import android.widget.Space;
 import android.widget.TextView;
 
+import androidx.annotation.MainThread;
 import androidx.recyclerview.widget.GridLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 import androidx.viewpager.widget.ViewPager;
@@ -238,22 +238,15 @@ public class ChooserActivity extends ResolverActivity implements
     private static final float DIRECT_SHARE_EXPANSION_RATE = 0.78f;
 
     private static final int DEFAULT_SALT_EXPIRATION_DAYS = 7;
-    private int mMaxHashSaltDays = DeviceConfig.getInt(DeviceConfig.NAMESPACE_SYSTEMUI,
+    private final int mMaxHashSaltDays = DeviceConfig.getInt(DeviceConfig.NAMESPACE_SYSTEMUI,
             SystemUiDeviceConfigFlags.HASH_SALT_MAX_DAYS,
             DEFAULT_SALT_EXPIRATION_DAYS);
 
-    private static final int DEFAULT_LIST_VIEW_UPDATE_DELAY_MS = 0;
-
     private static final int URI_PERMISSION_INTENT_FLAGS = Intent.FLAG_GRANT_READ_URI_PERMISSION
             | Intent.FLAG_GRANT_WRITE_URI_PERMISSION
             | Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION
             | Intent.FLAG_GRANT_PREFIX_URI_PERMISSION;
 
-    @VisibleForTesting
-    int mListViewUpdateDelayMs = DeviceConfig.getInt(DeviceConfig.NAMESPACE_SYSTEMUI,
-            SystemUiDeviceConfigFlags.SHARESHEET_LIST_VIEW_UPDATE_DELAY,
-            DEFAULT_LIST_VIEW_UPDATE_DELAY_MS);
-
     private Bundle mReplacementExtras;
     private IntentSender mChosenComponentSender;
     private IntentSender mRefinementIntentSender;
@@ -454,74 +447,6 @@ public class ChooserActivity extends ResolverActivity implements
         }
     }
 
-    private final ChooserHandler mChooserHandler = new ChooserHandler();
-
-    private class ChooserHandler extends Handler {
-        private static final int LIST_VIEW_UPDATE_MESSAGE = 6;
-        private static final int SHORTCUT_MANAGER_ALL_SHARE_TARGET_RESULTS = 7;
-
-        private void removeAllMessages() {
-            removeMessages(LIST_VIEW_UPDATE_MESSAGE);
-            removeMessages(SHORTCUT_MANAGER_ALL_SHARE_TARGET_RESULTS);
-        }
-
-        @Override
-        public void handleMessage(Message msg) {
-            if (mChooserMultiProfilePagerAdapter.getActiveListAdapter() == null || isDestroyed()) {
-                return;
-            }
-
-            switch (msg.what) {
-                case LIST_VIEW_UPDATE_MESSAGE:
-                    if (DEBUG) {
-                        Log.d(TAG, "LIST_VIEW_UPDATE_MESSAGE; ");
-                    }
-
-                    mChooserMultiProfilePagerAdapter
-                            .getListAdapterForUserHandle((UserHandle) msg.obj)
-                            .refreshListView();
-                    break;
-
-                case SHORTCUT_MANAGER_ALL_SHARE_TARGET_RESULTS:
-                    if (DEBUG) Log.d(TAG, "SHORTCUT_MANAGER_ALL_SHARE_TARGET_RESULTS");
-                    final Pair<UserHandle, ServiceResultInfo[]> args =
-                            (Pair<UserHandle, ServiceResultInfo[]>) msg.obj;
-                    final UserHandle userHandle = args.first;
-                    final ServiceResultInfo[] resultInfos = args.second;
-
-                    for (ServiceResultInfo resultInfo : resultInfos) {
-                        if (resultInfo.resultTargets != null) {
-                            ChooserListAdapter adapterForUserHandle =
-                                    mChooserMultiProfilePagerAdapter.getListAdapterForUserHandle(
-                                            resultInfo.userHandle);
-                            if (adapterForUserHandle != null) {
-                                adapterForUserHandle.addServiceResults(
-                                        resultInfo.originalTarget,
-                                        resultInfo.resultTargets,
-                                        msg.arg1,
-                                        emptyIfNull(mDirectShareShortcutInfoCache),
-                                        emptyIfNull(mDirectShareAppTargetCache));
-                            }
-                        }
-                    }
-
-                    logDirectShareTargetReceived(
-                            MetricsEvent.ACTION_DIRECT_SHARE_TARGETS_LOADED_SHORTCUT_MANAGER,
-                            userHandle);
-
-                    sendVoiceChoicesIfNeeded();
-                    getChooserActivityLogger().logSharesheetDirectLoadComplete();
-
-                    mChooserMultiProfilePagerAdapter.getActiveListAdapter()
-                            .completeServiceTargetLoading();
-                    break;
-
-                default:
-                    super.handleMessage(msg);
-            }
-        }
-    };
-
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         final long intentReceivedTime = System.currentTimeMillis();
@@ -791,8 +716,7 @@ public class ChooserActivity extends ResolverActivity implements
                         new ComponentName(
                                 appTarget.getPackageName(), appTarget.getClassName())));
             }
-            sendShareShortcutInfoList(shareShortcutInfos, chooserListAdapter, resultList,
-                    chooserListAdapter.getUserHandle());
+            sendShareShortcutInfoList(shareShortcutInfos, chooserListAdapter, resultList);
         };
     }
 
@@ -1622,7 +1546,6 @@ public class ChooserActivity extends ResolverActivity implements
             mRefinementResultReceiver.destroy();
             mRefinementResultReceiver = null;
         }
-        mChooserHandler.removeAllMessages();
 
         if (mPreviewCoord != null) mPreviewCoord.cancelLoads();
 
@@ -2003,7 +1926,7 @@ public class ChooserActivity extends ResolverActivity implements
             ShortcutManager sm = (ShortcutManager) selectedProfileContext
                     .getSystemService(Context.SHORTCUT_SERVICE);
             List<ShortcutManager.ShareShortcutInfo> resultList = sm.getShareTargets(filter);
-            sendShareShortcutInfoList(resultList, adapter, null, userHandle);
+            sendShareShortcutInfoList(resultList, adapter, null);
         });
     }
 
@@ -2033,12 +1956,13 @@ public class ChooserActivity extends ResolverActivity implements
     private void sendShareShortcutInfoList(
                 List<ShortcutManager.ShareShortcutInfo> resultList,
                 ChooserListAdapter chooserListAdapter,
-                @Nullable List<AppTarget> appTargets, UserHandle userHandle) {
+                @Nullable List<AppTarget> appTargets) {
         if (appTargets != null && appTargets.size() != resultList.size()) {
             throw new RuntimeException("resultList and appTargets must have the same size."
                     + " resultList.size()=" + resultList.size()
                     + " appTargets.size()=" + appTargets.size());
         }
+        UserHandle userHandle = chooserListAdapter.getUserHandle();
         Context selectedProfileContext = createContextAsUser(userHandle, 0 /* flags */);
         for (int i = resultList.size() - 1; i >= 0; i--) {
             final String packageName = resultList.get(i).getTargetComponent().getPackageName();
@@ -2075,12 +1999,15 @@ public class ChooserActivity extends ResolverActivity implements
                         mDirectShareShortcutInfoCache);
 
             ServiceResultInfo resultRecord = new ServiceResultInfo(
-                    displayResolveInfo, chooserTargets, userHandle);
+                    displayResolveInfo, chooserTargets);
             resultRecords.add(resultRecord);
         }
 
-        sendShortcutManagerShareTargetResults(
-                userHandle, shortcutType, resultRecords.toArray(new ServiceResultInfo[0]));
+        runOnUiThread(() -> {
+            if (!isDestroyed()) {
+                onShortcutsLoaded(chooserListAdapter, shortcutType, resultRecords);
+            }
+        });
     }
 
     private List<ShortcutManager.ShareShortcutInfo> filterShortcutsByTargetComponentName(
@@ -2094,15 +2021,6 @@ public class ChooserActivity extends ResolverActivity implements
         return matchingShortcuts;
     }
 
-    private void sendShortcutManagerShareTargetResults(
-            UserHandle userHandle, int shortcutType, ServiceResultInfo[] results) {
-        final Message msg = Message.obtain();
-        msg.what = ChooserHandler.SHORTCUT_MANAGER_ALL_SHARE_TARGET_RESULTS;
-        msg.obj = Pair.create(userHandle, results);
-        msg.arg1 = shortcutType;
-        mChooserHandler.sendMessage(msg);
-    }
-
     private boolean isPackageEnabled(Context context, String packageName) {
         if (TextUtils.isEmpty(packageName)) {
             return false;
@@ -2579,14 +2497,6 @@ public class ChooserActivity extends ResolverActivity implements
         return mMaxTargetsPerRow;
     }
 
-    @Override // ChooserListCommunicator
-    public void sendListViewUpdateMessage(UserHandle userHandle) {
-        Message msg = Message.obtain();
-        msg.what = ChooserHandler.LIST_VIEW_UPDATE_MESSAGE;
-        msg.obj = userHandle;
-        mChooserHandler.sendMessageDelayed(msg, mListViewUpdateDelayMs);
-    }
-
     @Override
     public void onListRebuilt(ResolverListAdapter listAdapter, boolean rebuildComplete) {
         setupScrollListener();
@@ -2633,6 +2543,33 @@ public class ChooserActivity extends ResolverActivity implements
         queryDirectShareTargets(chooserListAdapter, false);
     }
 
+    @MainThread
+    private void onShortcutsLoaded(
+            ChooserListAdapter adapter, int targetType, List<ServiceResultInfo> resultInfos) {
+        UserHandle userHandle = adapter.getUserHandle();
+        if (DEBUG) {
+            Log.d(TAG, "onShortcutsLoaded for user: " + userHandle);
+        }
+        for (ServiceResultInfo resultInfo : resultInfos) {
+            if (resultInfo.resultTargets != null) {
+                adapter.addServiceResults(
+                        resultInfo.originalTarget,
+                        resultInfo.resultTargets,
+                        targetType,
+                        emptyIfNull(mDirectShareShortcutInfoCache),
+                        emptyIfNull(mDirectShareAppTargetCache));
+            }
+        }
+        adapter.completeServiceTargetLoading();
+
+        logDirectShareTargetReceived(
+                MetricsEvent.ACTION_DIRECT_SHARE_TARGETS_LOADED_SHORTCUT_MANAGER,
+                userHandle);
+
+        sendVoiceChoicesIfNeeded();
+        getChooserActivityLogger().logSharesheetDirectLoadComplete();
+    }
+
     @VisibleForTesting
     protected boolean isUserRunning(UserHandle userHandle) {
         UserManager userManager = getSystemService(UserManager.class);
@@ -2965,12 +2902,12 @@ public class ChooserActivity extends ResolverActivity implements
      */
     @VisibleForTesting
     public final class ChooserGridAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
-        private ChooserListAdapter mChooserListAdapter;
+        private final ChooserListAdapter mChooserListAdapter;
         private final LayoutInflater mLayoutInflater;
 
         private DirectShareViewHolder mDirectShareViewHolder;
         private int mChooserTargetWidth = 0;
-        private boolean mShowAzLabelIfPoss;
+        private final boolean mShowAzLabelIfPoss;
         private boolean mLayoutRequested = false;
 
         private int mFooterHeight = 0;
@@ -3703,13 +3640,10 @@ public class ChooserActivity extends ResolverActivity implements
     static class ServiceResultInfo {
         public final DisplayResolveInfo originalTarget;
         public final List<ChooserTarget> resultTargets;
-        public final UserHandle userHandle;
 
-        public ServiceResultInfo(DisplayResolveInfo ot, List<ChooserTarget> rt,
-                UserHandle userHandle) {
+        ServiceResultInfo(DisplayResolveInfo ot, List<ChooserTarget> rt) {
             originalTarget = ot;
             resultTargets = rt;
-            this.userHandle = userHandle;
         }
     }
 
diff --git a/java/src/com/android/intentresolver/ChooserListAdapter.java b/java/src/com/android/intentresolver/ChooserListAdapter.java
index 2443659f..92cd0043 100644
--- a/java/src/com/android/intentresolver/ChooserListAdapter.java
+++ b/java/src/com/android/intentresolver/ChooserListAdapter.java
@@ -33,7 +33,6 @@ import android.content.pm.ShortcutInfo;
 import android.graphics.drawable.Drawable;
 import android.os.AsyncTask;
 import android.os.Trace;
-import android.os.UserHandle;
 import android.os.UserManager;
 import android.provider.DeviceConfig;
 import android.service.chooser.ChooserTarget;
@@ -90,8 +89,6 @@ public class ChooserListAdapter extends ResolverListAdapter {
     private final List<TargetInfo> mServiceTargets = new ArrayList<>();
     private final List<DisplayResolveInfo> mCallerTargets = new ArrayList<>();
 
-    private boolean mListViewDataChanged = false;
-
     // Sorted list of DisplayResolveInfos for the alphabetical app section.
     private List<DisplayResolveInfo> mSortedList = new ArrayList<>();
 
@@ -225,21 +222,6 @@ public class ChooserListAdapter extends ResolverListAdapter {
 
     }
 
-    @Override
-    public void notifyDataSetChanged() {
-        if (!mListViewDataChanged) {
-            mChooserListCommunicator.sendListViewUpdateMessage(getUserHandle());
-            mListViewDataChanged = true;
-        }
-    }
-
-    void refreshListView() {
-        if (mListViewDataChanged) {
-            super.notifyDataSetChanged();
-        }
-        mListViewDataChanged = false;
-    }
-
     private void createPlaceHolders() {
         mServiceTargets.clear();
         for (int i = 0; i < mChooserListCommunicator.getMaxRankedTargets(); i++) {
@@ -652,8 +634,6 @@ public class ChooserListAdapter extends ResolverListAdapter {
 
         int getMaxRankedTargets();
 
-        void sendListViewUpdateMessage(UserHandle userHandle);
-
         boolean isSendAction(Intent targetIntent);
     }