Fix class cast issue in AddItemActivity am: 671ffb88ca am: 414e50b0f3

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15299573

Change-Id: I799285ff538d8b9fd232edfb88faa8af09327cd0

src/com/android/launcher3/widget/WidgetCell.java

@@ -46,6 +46,7 @@ import androidx.annotation.Nullable;
 import com.android.launcher3.BaseActivity;
 import com.android.launcher3.CheckLongPressHelper;
 import com.android.launcher3.DeviceProfile;
+import com.android.launcher3.Launcher;
 import com.android.launcher3.R;
 import com.android.launcher3.icons.FastBitmapDrawable;
 import com.android.launcher3.icons.RoundDrawableWrapper;
@@ -242,12 +243,7 @@ public class WidgetCell extends LinearLayout implements OnLayoutChangeListener {
 
     private void applyPreviewOnAppWidgetHostView(WidgetItem item) {
         if (mRemoteViewsPreview != null) {
-            mAppWidgetHostViewPreview = new NavigableAppWidgetHostView(getContext()) {
+            mAppWidgetHostViewPreview = createAppWidgetHostView(getContext());
-                @Override
-                protected boolean shouldAllowDirectClick() {
-                    return false;
-                }
-            };
             setAppWidgetHostViewPreview(mAppWidgetHostViewPreview, item.widgetInfo,
                     mRemoteViewsPreview);
             return;
@@ -255,10 +251,15 @@ public class WidgetCell extends LinearLayout implements OnLayoutChangeListener {
 
         if (!item.hasPreviewLayout()) return;
 
-        mAppWidgetHostViewPreview = new LauncherAppWidgetHostView(getContext());
+        Context context = getContext();
+        // If the context is a Launcher activity, DragView will show mAppWidgetHostViewPreview as
+        // a preview during drag & drop. And thus, we should use LauncherAppWidgetHostView, which
+        // supports applying local color extraction during drag & drop.
+        mAppWidgetHostViewPreview = isLauncherContext(context)
+                ? new LauncherAppWidgetHostView(context)
+                : createAppWidgetHostView(context);
         LauncherAppWidgetProviderInfo launcherAppWidgetProviderInfo =
-                LauncherAppWidgetProviderInfo.fromProviderInfo(getContext(),
+                LauncherAppWidgetProviderInfo.fromProviderInfo(context, item.widgetInfo.clone());
-                        item.widgetInfo.clone());
         // A hack to force the initial layout to be the preview layout since there is no API for
         // rendering a preview layout for work profile apps yet. For non-work profile layout, a
         // proper solution is to use RemoteViews(PackageName, LayoutId).
@@ -431,6 +432,24 @@ public class WidgetCell extends LinearLayout implements OnLayoutChangeListener {
         return "";
     }
 
+    private static NavigableAppWidgetHostView createAppWidgetHostView(Context context) {
+        return new NavigableAppWidgetHostView(context) {
+            @Override
+            protected boolean shouldAllowDirectClick() {
+                return false;
+            }
+        };
+    }
+
+    private static boolean isLauncherContext(Context context) {
+        try {
+            Launcher.getLauncher(context);
+            return true;
+        } catch (Exception e) {
+            return false;
+        }
+    }
+
     @Override
     public CharSequence getAccessibilityClassName() {
         return WidgetCell.class.getName();