Handle widget taps in WidgetPickerActivity.

Bug: 307306823
Test: atest Launcher3Tests
Flag: NA
Change-Id: I05cd42eae91447cfe99165096a735f6e04257203
diff --git a/quickstep/src/com/android/launcher3/WidgetPickerActivity.java b/quickstep/src/com/android/launcher3/WidgetPickerActivity.java
index 43716ab..477cd84 100644
--- a/quickstep/src/com/android/launcher3/WidgetPickerActivity.java
+++ b/quickstep/src/com/android/launcher3/WidgetPickerActivity.java
@@ -22,7 +22,10 @@
 import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
 import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
 
+import android.appwidget.AppWidgetProviderInfo;
+import android.content.Intent;
 import android.os.Bundle;
+import android.view.View;
 import android.view.WindowInsetsController;
 import android.view.WindowManager;
 
@@ -32,6 +35,7 @@
 import com.android.launcher3.model.WidgetsModel;
 import com.android.launcher3.popup.PopupDataProvider;
 import com.android.launcher3.widget.BaseWidgetSheet;
+import com.android.launcher3.widget.WidgetCell;
 import com.android.launcher3.widget.model.WidgetsListBaseEntry;
 import com.android.launcher3.widget.picker.WidgetsFullSheet;
 
@@ -81,6 +85,23 @@
         return mDragLayer;
     }
 
+    @Override
+    public View.OnClickListener getItemOnClickListener() {
+        return v -> {
+            final AppWidgetProviderInfo info =
+                    (v instanceof WidgetCell) ? ((WidgetCell) v).getWidgetItem().widgetInfo : null;
+            if (info == null || info.provider == null) {
+                return;
+            }
+
+            setResult(RESULT_OK, new Intent()
+                    .putExtra(Intent.EXTRA_COMPONENT_NAME, info.provider)
+                    .putExtra(Intent.EXTRA_USER, info.getProfile()));
+
+            finish();
+        };
+    }
+
     private void refreshAndBindWidgets() {
         MODEL_EXECUTOR.execute(() -> {
             LauncherAppState app = LauncherAppState.getInstance(this);
diff --git a/src/com/android/launcher3/widget/WidgetCell.java b/src/com/android/launcher3/widget/WidgetCell.java
index c30342a..8f5e2b6 100644
--- a/src/com/android/launcher3/widget/WidgetCell.java
+++ b/src/com/android/launcher3/widget/WidgetCell.java
@@ -147,6 +147,11 @@
         return mAppWidgetHostViewScale;
     }
 
+    /** Returns the {@link WidgetItem} for this {@link WidgetCell}. */
+    public WidgetItem getWidgetItem() {
+        return mItem;
+    }
+
     /**
      * Called to clear the view and free attached resources. (e.g., {@link Bitmap}
      */