diff --git a/packages/SystemUI/src/com/android/systemui/screenshot/ScreenshotDetectionController.kt b/packages/SystemUI/src/com/android/systemui/screenshot/ScreenshotDetectionController.kt
index 70ea2b5b9507b..48aa60f69cdb9 100644
--- a/packages/SystemUI/src/com/android/systemui/screenshot/ScreenshotDetectionController.kt
+++ b/packages/SystemUI/src/com/android/systemui/screenshot/ScreenshotDetectionController.kt
@@ -17,8 +17,10 @@
 package com.android.systemui.screenshot
 
 import android.content.pm.PackageManager
+import android.view.Display
 import android.view.IWindowManager
 import android.view.ViewGroup
+import android.view.WindowManager
 import android.widget.TextView
 import com.android.systemui.R
 import javax.inject.Inject
@@ -34,8 +36,18 @@ constructor(
      * notified.
      */
     fun maybeNotifyOfScreenshot(data: ScreenshotData): List<CharSequence> {
-        // TODO: actually ask the window manager once API is available.
-        return listOf()
+        // No notification for screenshots from overview.
+        if (data.source == WindowManager.ScreenshotSource.SCREENSHOT_OVERVIEW) return listOf()
+
+        // Notify listeners, retrieve a list of listening components.
+        val components = windowManager.notifyScreenshotListeners(Display.DEFAULT_DISPLAY)
+
+        // Convert component names to app names.
+        return components.map {
+            packageManager
+                .getActivityInfo(it, PackageManager.ComponentInfoFlags.of(0))
+                .loadLabel(packageManager)
+        }
     }
 
     fun populateView(view: ViewGroup, appNames: List<CharSequence>) {
diff --git a/packages/SystemUI/tests/src/com/android/systemui/screenshot/ScreenshotDetectionControllerTest.kt b/packages/SystemUI/tests/src/com/android/systemui/screenshot/ScreenshotDetectionControllerTest.kt
new file mode 100644
index 0000000000000..1f18d91aa1339
--- /dev/null
+++ b/packages/SystemUI/tests/src/com/android/systemui/screenshot/ScreenshotDetectionControllerTest.kt
@@ -0,0 +1,161 @@
+/*
+ * Copyright (C) 2023 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.systemui.screenshot
+
+import android.content.ComponentName
+import android.content.pm.ActivityInfo
+import android.content.pm.PackageManager
+import android.testing.AndroidTestingRunner
+import android.view.Display
+import android.view.IWindowManager
+import android.view.WindowManager
+import androidx.test.filters.SmallTest
+import com.android.systemui.util.mockito.any
+import com.android.systemui.util.mockito.eq
+import com.android.systemui.util.mockito.whenever
+import junit.framework.Assert.assertEquals
+import junit.framework.Assert.assertTrue
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.Mock
+import org.mockito.Mockito.mock
+import org.mockito.Mockito.never
+import org.mockito.Mockito.verify
+import org.mockito.MockitoAnnotations
+
+@SmallTest
+@RunWith(AndroidTestingRunner::class)
+class ScreenshotDetectionControllerTest {
+
+    @Mock lateinit var windowManager: IWindowManager
+
+    @Mock lateinit var packageManager: PackageManager
+
+    lateinit var controller: ScreenshotDetectionController
+
+    @Before
+    fun setup() {
+        MockitoAnnotations.initMocks(this)
+
+        controller = ScreenshotDetectionController(windowManager, packageManager)
+    }
+
+    @Test
+    fun testMaybeNotifyOfScreenshot_ignoresOverview() {
+        val data = ScreenshotData.forTesting()
+        data.source = WindowManager.ScreenshotSource.SCREENSHOT_OVERVIEW
+
+        val list = controller.maybeNotifyOfScreenshot(data)
+
+        assertTrue(list.isEmpty())
+        verify(windowManager, never()).notifyScreenshotListeners(any())
+    }
+
+    @Test
+    fun testMaybeNotifyOfScreenshot_emptySet() {
+        val data = ScreenshotData.forTesting()
+        data.source = WindowManager.ScreenshotSource.SCREENSHOT_KEY_CHORD
+
+        whenever(windowManager.notifyScreenshotListeners(eq(Display.DEFAULT_DISPLAY)))
+            .thenReturn(listOf())
+
+        val list = controller.maybeNotifyOfScreenshot(data)
+
+        assertTrue(list.isEmpty())
+    }
+
+    @Test
+    fun testMaybeNotifyOfScreenshot_oneApp() {
+        val data = ScreenshotData.forTesting()
+        data.source = WindowManager.ScreenshotSource.SCREENSHOT_KEY_CHORD
+
+        val component = ComponentName("package1", "class1")
+        val appName = "app name"
+        val activityInfo = mock(ActivityInfo::class.java)
+
+        whenever(
+                packageManager.getActivityInfo(
+                    eq(component),
+                    any(PackageManager.ComponentInfoFlags::class.java)
+                )
+            )
+            .thenReturn(activityInfo)
+        whenever(activityInfo.loadLabel(eq(packageManager))).thenReturn(appName)
+
+        whenever(windowManager.notifyScreenshotListeners(eq(Display.DEFAULT_DISPLAY)))
+            .thenReturn(listOf(component))
+
+        val list = controller.maybeNotifyOfScreenshot(data)
+
+        assertEquals(1, list.size)
+        assertEquals(appName, list[0])
+    }
+
+    @Test
+    fun testMaybeNotifyOfScreenshot_multipleApps() {
+        val data = ScreenshotData.forTesting()
+        data.source = WindowManager.ScreenshotSource.SCREENSHOT_KEY_CHORD
+
+        val component1 = ComponentName("package1", "class1")
+        val component2 = ComponentName("package2", "class2")
+        val component3 = ComponentName("package3", "class3")
+        val appName1 = "app name 1"
+        val appName2 = "app name 2"
+        val appName3 = "app name 3"
+
+        val activityInfo1 = mock(ActivityInfo::class.java)
+        val activityInfo2 = mock(ActivityInfo::class.java)
+        val activityInfo3 = mock(ActivityInfo::class.java)
+
+        whenever(
+                packageManager.getActivityInfo(
+                    eq(component1),
+                    any(PackageManager.ComponentInfoFlags::class.java)
+                )
+            )
+            .thenReturn(activityInfo1)
+        whenever(
+                packageManager.getActivityInfo(
+                    eq(component2),
+                    any(PackageManager.ComponentInfoFlags::class.java)
+                )
+            )
+            .thenReturn(activityInfo2)
+        whenever(
+                packageManager.getActivityInfo(
+                    eq(component3),
+                    any(PackageManager.ComponentInfoFlags::class.java)
+                )
+            )
+            .thenReturn(activityInfo3)
+
+        whenever(activityInfo1.loadLabel(eq(packageManager))).thenReturn(appName1)
+        whenever(activityInfo2.loadLabel(eq(packageManager))).thenReturn(appName2)
+        whenever(activityInfo3.loadLabel(eq(packageManager))).thenReturn(appName3)
+
+        whenever(windowManager.notifyScreenshotListeners(eq(Display.DEFAULT_DISPLAY)))
+            .thenReturn(listOf(component1, component2, component3))
+
+        val list = controller.maybeNotifyOfScreenshot(data)
+
+        assertEquals(3, list.size)
+        assertEquals(appName1, list[0])
+        assertEquals(appName2, list[1])
+        assertEquals(appName3, list[2])
+    }
+}