Open Notes from a KeyEvent dispatch

Dispatches any system `KeyEvent` from `PhoneWindowManager` to SystemUI, allowing SystemUI to handle the KeyEvent with custom behaviour. How the `KeyEvent` is handled will depend on the context:
- If user is in the lockscreen, it will launch a full screen experience.
- Otherwise, it will launch a floating task.

Once the context is decided, we will query for any Activity that can handle the new action `android.intent.action.NOTES` to execute the launch. If no `Activity` is available, nothing will happen.

To enable the feature, one must run the following ADB commands:
- adb shell setprop "persist.wm.debug.floating_tasks" 1 # enables floating windows
- adb shell setprop "persist.wm.debug.floating_tasks_as_bubbles" 1 # optional: enables bubble windows
- adb shell setprop ""persist.sysui.debug.note_tasks"" 1 # enables note tasking experience
- adb reboot # restart to load the new configs

Test: atest SystemUITests:WMShellTest
Test: atest SystemUITests:NoteTaskControllerTest
Test: atest SystemUITests:NoteTaskInitializerTest
Test: atest SystemUITests:NoteTaskIntentResolverTest

Fixes: 248274123

Change-Id: I36f30b3cbfe9e538729471d531b1b4b770738544

packages/SystemUI/AndroidManifest.xml

@@ -289,6 +289,12 @@
     <!-- Query all packages on device on R+ -->
     <uses-permission android:name="android.permission.QUERY_ALL_PACKAGES" />
 
+    <queries>
+        <intent>
+            <action android:name="android.intent.action.NOTES" />
+        </intent>
+    </queries>
+
     <!-- Permission to register process observer -->
     <uses-permission android:name="android.permission.SET_ACTIVITY_WATCHER"/>
 

packages/SystemUI/src/com/android/systemui/dagger/SystemUIModule.java

@@ -48,6 +48,7 @@ import com.android.systemui.log.dagger.LogModule;
 import com.android.systemui.mediaprojection.appselector.MediaProjectionModule;
 import com.android.systemui.model.SysUiState;
 import com.android.systemui.navigationbar.NavigationBarComponent;
+import com.android.systemui.notetask.NoteTaskModule;
 import com.android.systemui.people.PeopleModule;
 import com.android.systemui.plugins.BcSmartspaceDataPlugin;
 import com.android.systemui.privacy.PrivacyModule;
@@ -152,6 +153,7 @@ import dagger.Provides;
             TunerModule.class,
             UserModule.class,
             UtilModule.class,
+            NoteTaskModule.class,
             WalletModule.class
         },
         subcomponents = {

packages/SystemUI/src/com/android/systemui/flags/Flags.kt

@@ -328,6 +328,9 @@ object Flags {
     // 1800 - shade container
     @JvmField val LEAVE_SHADE_OPEN_FOR_BUGREPORT = UnreleasedFlag(1800, true)
 
+    // 1900 - note task
+    @JvmField val NOTE_TASKS = SysPropBooleanFlag(1900, "persist.sysui.debug.note_tasks")
+
     // Pay no attention to the reflection behind the curtain.
     // ========================== Curtain ==========================
     // |                                                           |

packages/SystemUI/src/com/android/systemui/notetask/NoteTaskController.kt

@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2022 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.notetask
+
+import android.app.KeyguardManager
+import android.content.Context
+import android.os.UserManager
+import android.view.KeyEvent
+import com.android.systemui.dagger.SysUISingleton
+import com.android.systemui.util.kotlin.getOrNull
+import com.android.wm.shell.floating.FloatingTasks
+import java.util.Optional
+import javax.inject.Inject
+
+/**
+ * Entry point for creating and managing note.
+ *
+ * The controller decides how a note is launched based in the device state: locked or unlocked.
+ *
+ * Currently, we only support a single task per time.
+ */
+@SysUISingleton
+internal class NoteTaskController
+@Inject
+constructor(
+    private val context: Context,
+    private val intentResolver: NoteTaskIntentResolver,
+    private val optionalFloatingTasks: Optional<FloatingTasks>,
+    private val optionalKeyguardManager: Optional<KeyguardManager>,
+    private val optionalUserManager: Optional<UserManager>,
+    @NoteTaskEnabledKey private val isEnabled: Boolean,
+) {
+
+    fun handleSystemKey(keyCode: Int) {
+        if (!isEnabled) return
+
+        if (keyCode == KeyEvent.KEYCODE_VIDEO_APP_1) {
+            showNoteTask()
+        }
+    }
+
+    private fun showNoteTask() {
+        val floatingTasks = optionalFloatingTasks.getOrNull() ?: return
+        val keyguardManager = optionalKeyguardManager.getOrNull() ?: return
+        val userManager = optionalUserManager.getOrNull() ?: return
+        val intent = intentResolver.resolveIntent() ?: return
+
+        // TODO(b/249954038): We should handle direct boot (isUserUnlocked). For now, we do nothing.
+        if (!userManager.isUserUnlocked) return
+
+        if (keyguardManager.isKeyguardLocked) {
+            context.startActivity(intent)
+        } else {
+            // TODO(b/254606432): Should include Intent.EXTRA_FLOATING_WINDOW_MODE parameter.
+            floatingTasks.showOrSetStashed(intent)
+        }
+    }
+}

packages/SystemUI/src/com/android/systemui/notetask/NoteTaskEnabledKey.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2022 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.notetask
+
+import javax.inject.Qualifier
+
+/** Key associated with a [Boolean] flag that enables or disables the note task feature. */
+@Qualifier internal annotation class NoteTaskEnabledKey

packages/SystemUI/src/com/android/systemui/notetask/NoteTaskInitializer.kt

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2022 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.notetask
+
+import com.android.systemui.statusbar.CommandQueue
+import com.android.wm.shell.floating.FloatingTasks
+import dagger.Lazy
+import java.util.Optional
+import javax.inject.Inject
+
+/** Class responsible to "glue" all note task dependencies. */
+internal class NoteTaskInitializer
+@Inject
+constructor(
+    private val optionalFloatingTasks: Optional<FloatingTasks>,
+    private val lazyNoteTaskController: Lazy<NoteTaskController>,
+    private val commandQueue: CommandQueue,
+    @NoteTaskEnabledKey private val isEnabled: Boolean,
+) {
+
+    private val callbacks =
+        object : CommandQueue.Callbacks {
+            override fun handleSystemKey(keyCode: Int) {
+                lazyNoteTaskController.get().handleSystemKey(keyCode)
+            }
+        }
+
+    fun initialize() {
+        if (isEnabled && optionalFloatingTasks.isPresent) {
+            commandQueue.addCallback(callbacks)
+        }
+    }
+}

packages/SystemUI/src/com/android/systemui/notetask/NoteTaskIntentResolver.kt

@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2022 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.notetask
+
+import android.content.ComponentName
+import android.content.Intent
+import android.content.pm.ActivityInfo
+import android.content.pm.PackageManager
+import android.content.pm.PackageManager.ResolveInfoFlags
+import com.android.systemui.notetask.NoteTaskIntentResolver.Companion.NOTES_ACTION
+import javax.inject.Inject
+
+/**
+ * Class responsible to query all apps and find one that can handle the [NOTES_ACTION]. If found, an
+ * [Intent] ready for be launched will be returned. Otherwise, returns null.
+ *
+ * TODO(b/248274123): should be revisited once the notes role is implemented.
+ */
+internal class NoteTaskIntentResolver
+@Inject
+constructor(
+    private val packageManager: PackageManager,
+) {
+
+    fun resolveIntent(): Intent? {
+        val intent = Intent(NOTES_ACTION)
+        val flags = ResolveInfoFlags.of(PackageManager.MATCH_DEFAULT_ONLY.toLong())
+        val infoList = packageManager.queryIntentActivities(intent, flags)
+
+        for (info in infoList) {
+            val packageName = info.serviceInfo.applicationInfo.packageName ?: continue
+            val activityName = resolveActivityNameForNotesAction(packageName) ?: continue
+
+            return Intent(NOTES_ACTION)
+                .setComponent(ComponentName(packageName, activityName))
+                .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+        }
+
+        return null
+    }
+
+    private fun resolveActivityNameForNotesAction(packageName: String): String? {
+        val intent = Intent(NOTES_ACTION).setPackage(packageName)
+        val flags = ResolveInfoFlags.of(PackageManager.MATCH_DEFAULT_ONLY.toLong())
+        val resolveInfo = packageManager.resolveActivity(intent, flags)
+
+        val activityInfo = resolveInfo?.activityInfo ?: return null
+        if (activityInfo.name.isNullOrBlank()) return null
+        if (!activityInfo.exported) return null
+        if (!activityInfo.enabled) return null
+        if (!activityInfo.showWhenLocked) return null
+        if (!activityInfo.turnScreenOn) return null
+
+        return activityInfo.name
+    }
+
+    companion object {
+        // TODO(b/254606432): Use Intent.ACTION_NOTES and Intent.ACTION_NOTES_LOCKED instead.
+        const val NOTES_ACTION = "android.intent.action.NOTES"
+    }
+}
+
+private val ActivityInfo.showWhenLocked: Boolean
+    get() = flags and ActivityInfo.FLAG_SHOW_WHEN_LOCKED != 0
+
+private val ActivityInfo.turnScreenOn: Boolean
+    get() = flags and ActivityInfo.FLAG_TURN_SCREEN_ON != 0

packages/SystemUI/src/com/android/systemui/notetask/NoteTaskModule.kt

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2022 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.notetask
+
+import android.app.KeyguardManager
+import android.content.Context
+import android.os.UserManager
+import androidx.core.content.getSystemService
+import com.android.systemui.flags.FeatureFlags
+import com.android.systemui.flags.Flags
+import dagger.Module
+import dagger.Provides
+import java.util.*
+
+/** Compose all dependencies required by Note Task feature. */
+@Module
+internal class NoteTaskModule {
+
+    @[Provides NoteTaskEnabledKey]
+    fun provideIsNoteTaskEnabled(featureFlags: FeatureFlags): Boolean {
+        return featureFlags.isEnabled(Flags.NOTE_TASKS)
+    }
+
+    @Provides
+    fun provideOptionalKeyguardManager(context: Context): Optional<KeyguardManager> {
+        return Optional.ofNullable(context.getSystemService())
+    }
+
+    @Provides
+    fun provideOptionalUserManager(context: Context): Optional<UserManager> {
+        return Optional.ofNullable(context.getSystemService())
+    }
+}

packages/SystemUI/src/com/android/systemui/wmshell/WMShell.java

@@ -49,6 +49,7 @@ import com.android.systemui.dagger.qualifiers.Main;
 import com.android.systemui.keyguard.ScreenLifecycle;
 import com.android.systemui.keyguard.WakefulnessLifecycle;
 import com.android.systemui.model.SysUiState;
+import com.android.systemui.notetask.NoteTaskInitializer;
 import com.android.systemui.settings.UserTracker;
 import com.android.systemui.shared.tracing.ProtoTraceable;
 import com.android.systemui.statusbar.CommandQueue;
@@ -58,7 +59,6 @@ import com.android.systemui.tracing.ProtoTracer;
 import com.android.systemui.tracing.nano.SystemUiTraceProto;
 import com.android.wm.shell.desktopmode.DesktopMode;
 import com.android.wm.shell.desktopmode.DesktopModeTaskRepository;
-import com.android.wm.shell.floating.FloatingTasks;
 import com.android.wm.shell.nano.WmShellTraceProto;
 import com.android.wm.shell.onehanded.OneHanded;
 import com.android.wm.shell.onehanded.OneHandedEventCallback;
@@ -113,7 +113,6 @@ public final class WMShell implements
     private final Optional<Pip> mPipOptional;
     private final Optional<SplitScreen> mSplitScreenOptional;
     private final Optional<OneHanded> mOneHandedOptional;
-    private final Optional<FloatingTasks> mFloatingTasksOptional;
     private final Optional<DesktopMode> mDesktopModeOptional;
 
     private final CommandQueue mCommandQueue;
@@ -125,6 +124,7 @@ public final class WMShell implements
     private final WakefulnessLifecycle mWakefulnessLifecycle;
     private final ProtoTracer mProtoTracer;
     private final UserTracker mUserTracker;
+    private final NoteTaskInitializer mNoteTaskInitializer;
     private final Executor mSysUiMainExecutor;
 
     // Listeners and callbacks. Note that we prefer member variable over anonymous class here to
@@ -176,7 +176,6 @@ public final class WMShell implements
             Optional<Pip> pipOptional,
             Optional<SplitScreen> splitScreenOptional,
             Optional<OneHanded> oneHandedOptional,
-            Optional<FloatingTasks> floatingTasksOptional,
             Optional<DesktopMode> desktopMode,
             CommandQueue commandQueue,
             ConfigurationController configurationController,
@@ -187,6 +186,7 @@ public final class WMShell implements
             ProtoTracer protoTracer,
             WakefulnessLifecycle wakefulnessLifecycle,
             UserTracker userTracker,
+            NoteTaskInitializer noteTaskInitializer,
             @Main Executor sysUiMainExecutor) {
         mContext = context;
         mShell = shell;
@@ -203,7 +203,7 @@ public final class WMShell implements
         mWakefulnessLifecycle = wakefulnessLifecycle;
         mProtoTracer = protoTracer;
         mUserTracker = userTracker;
-        mFloatingTasksOptional = floatingTasksOptional;
+        mNoteTaskInitializer = noteTaskInitializer;
         mSysUiMainExecutor = sysUiMainExecutor;
     }
 
@@ -226,6 +226,8 @@ public final class WMShell implements
         mSplitScreenOptional.ifPresent(this::initSplitScreen);
         mOneHandedOptional.ifPresent(this::initOneHanded);
         mDesktopModeOptional.ifPresent(this::initDesktopMode);
+
+        mNoteTaskInitializer.initialize();
     }
 
     @VisibleForTesting

packages/SystemUI/tests/src/com/android/systemui/notetask/NoteTaskControllerTest.kt

@@ -0,0 +1,166 @@
+/*
+ * Copyright (C) 2022 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.notetask
+
+import android.app.KeyguardManager
+import android.content.Context
+import android.content.Intent
+import android.os.UserManager
+import android.test.suitebuilder.annotation.SmallTest
+import android.view.KeyEvent
+import androidx.test.runner.AndroidJUnit4
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.notetask.NoteTaskIntentResolver.Companion.NOTES_ACTION
+import com.android.systemui.util.mockito.whenever
+import com.android.wm.shell.floating.FloatingTasks
+import java.util.*
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.Mock
+import org.mockito.Mockito.never
+import org.mockito.Mockito.verify
+import org.mockito.MockitoAnnotations
+
+/**
+ * Tests for [NoteTaskController].
+ *
+ * Build/Install/Run:
+ * - atest SystemUITests:NoteTaskControllerTest
+ */
+@SmallTest
+@RunWith(AndroidJUnit4::class)
+internal class NoteTaskControllerTest : SysuiTestCase() {
+
+    private val notesIntent = Intent(NOTES_ACTION)
+
+    @Mock lateinit var context: Context
+    @Mock lateinit var noteTaskIntentResolver: NoteTaskIntentResolver
+    @Mock lateinit var floatingTasks: FloatingTasks
+    @Mock lateinit var optionalFloatingTasks: Optional<FloatingTasks>
+    @Mock lateinit var keyguardManager: KeyguardManager
+    @Mock lateinit var optionalKeyguardManager: Optional<KeyguardManager>
+    @Mock lateinit var optionalUserManager: Optional<UserManager>
+    @Mock lateinit var userManager: UserManager
+
+    @Before
+    fun setUp() {
+        MockitoAnnotations.initMocks(this)
+
+        whenever(noteTaskIntentResolver.resolveIntent()).thenReturn(notesIntent)
+        whenever(optionalFloatingTasks.orElse(null)).thenReturn(floatingTasks)
+        whenever(optionalKeyguardManager.orElse(null)).thenReturn(keyguardManager)
+        whenever(optionalUserManager.orElse(null)).thenReturn(userManager)
+        whenever(userManager.isUserUnlocked).thenReturn(true)
+    }
+
+    private fun createNoteTaskController(isEnabled: Boolean = true): NoteTaskController {
+        return NoteTaskController(
+            context = context,
+            intentResolver = noteTaskIntentResolver,
+            optionalFloatingTasks = optionalFloatingTasks,
+            optionalKeyguardManager = optionalKeyguardManager,
+            optionalUserManager = optionalUserManager,
+            isEnabled = isEnabled,
+        )
+    }
+
+    @Test
+    fun handleSystemKey_keyguardIsLocked_shouldStartActivity() {
+        whenever(keyguardManager.isKeyguardLocked).thenReturn(true)
+
+        createNoteTaskController().handleSystemKey(KeyEvent.KEYCODE_VIDEO_APP_1)
+
+        verify(context).startActivity(notesIntent)
+        verify(floatingTasks, never()).showOrSetStashed(notesIntent)
+    }
+
+    @Test
+    fun handleSystemKey_keyguardIsUnlocked_shouldStartFloatingTask() {
+        whenever(keyguardManager.isKeyguardLocked).thenReturn(false)
+
+        createNoteTaskController().handleSystemKey(KeyEvent.KEYCODE_VIDEO_APP_1)
+
+        verify(floatingTasks).showOrSetStashed(notesIntent)
+        verify(context, never()).startActivity(notesIntent)
+    }
+
+    @Test
+    fun handleSystemKey_receiveInvalidSystemKey_shouldDoNothing() {
+        createNoteTaskController().handleSystemKey(KeyEvent.KEYCODE_UNKNOWN)
+
+        verify(context, never()).startActivity(notesIntent)
+        verify(floatingTasks, never()).showOrSetStashed(notesIntent)
+    }
+
+    @Test
+    fun handleSystemKey_floatingTasksIsNull_shouldDoNothing() {
+        whenever(optionalFloatingTasks.orElse(null)).thenReturn(null)
+
+        createNoteTaskController().handleSystemKey(KeyEvent.KEYCODE_VIDEO_APP_1)
+
+        verify(context, never()).startActivity(notesIntent)
+        verify(floatingTasks, never()).showOrSetStashed(notesIntent)
+    }
+
+    @Test
+    fun handleSystemKey_keyguardManagerIsNull_shouldDoNothing() {
+        whenever(optionalKeyguardManager.orElse(null)).thenReturn(null)
+
+        createNoteTaskController().handleSystemKey(KeyEvent.KEYCODE_VIDEO_APP_1)
+
+        verify(context, never()).startActivity(notesIntent)
+        verify(floatingTasks, never()).showOrSetStashed(notesIntent)
+    }
+
+    @Test
+    fun handleSystemKey_userManagerIsNull_shouldDoNothing() {
+        whenever(optionalUserManager.orElse(null)).thenReturn(null)
+
+        createNoteTaskController().handleSystemKey(KeyEvent.KEYCODE_VIDEO_APP_1)
+
+        verify(context, never()).startActivity(notesIntent)
+        verify(floatingTasks, never()).showOrSetStashed(notesIntent)
+    }
+
+    @Test
+    fun handleSystemKey_intentResolverReturnsNull_shouldDoNothing() {
+        whenever(noteTaskIntentResolver.resolveIntent()).thenReturn(null)
+
+        createNoteTaskController().handleSystemKey(KeyEvent.KEYCODE_VIDEO_APP_1)
+
+        verify(context, never()).startActivity(notesIntent)
+        verify(floatingTasks, never()).showOrSetStashed(notesIntent)
+    }
+
+    @Test
+    fun handleSystemKey_flagDisabled_shouldDoNothing() {
+        createNoteTaskController(isEnabled = false).handleSystemKey(KeyEvent.KEYCODE_VIDEO_APP_1)
+
+        verify(context, never()).startActivity(notesIntent)
+        verify(floatingTasks, never()).showOrSetStashed(notesIntent)
+    }
+
+    @Test
+    fun handleSystemKey_userIsLocked_shouldDoNothing() {
+        whenever(userManager.isUserUnlocked).thenReturn(false)
+
+        createNoteTaskController().handleSystemKey(KeyEvent.KEYCODE_VIDEO_APP_1)
+
+        verify(context, never()).startActivity(notesIntent)
+        verify(floatingTasks, never()).showOrSetStashed(notesIntent)
+    }
+}

packages/SystemUI/tests/src/com/android/systemui/notetask/NoteTaskInitializerTest.kt

@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2022 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.notetask
+
+import android.test.suitebuilder.annotation.SmallTest
+import androidx.test.runner.AndroidJUnit4
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.statusbar.CommandQueue
+import com.android.systemui.util.mockito.mock
+import com.android.systemui.util.mockito.whenever
+import com.android.wm.shell.floating.FloatingTasks
+import java.util.*
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.ArgumentMatchers.any
+import org.mockito.Mock
+import org.mockito.Mockito.never
+import org.mockito.Mockito.verify
+import org.mockito.MockitoAnnotations
+
+/**
+ * Tests for [NoteTaskController].
+ *
+ * Build/Install/Run:
+ * - atest SystemUITests:NoteTaskInitializerTest
+ */
+@SmallTest
+@RunWith(AndroidJUnit4::class)
+internal class NoteTaskInitializerTest : SysuiTestCase() {
+
+    @Mock lateinit var commandQueue: CommandQueue
+    @Mock lateinit var floatingTasks: FloatingTasks
+    @Mock lateinit var optionalFloatingTasks: Optional<FloatingTasks>
+
+    @Before
+    fun setUp() {
+        MockitoAnnotations.initMocks(this)
+
+        whenever(optionalFloatingTasks.isPresent).thenReturn(true)
+        whenever(optionalFloatingTasks.orElse(null)).thenReturn(floatingTasks)
+    }
+
+    private fun createNoteTaskInitializer(isEnabled: Boolean = true): NoteTaskInitializer {
+        return NoteTaskInitializer(
+            optionalFloatingTasks = optionalFloatingTasks,
+            lazyNoteTaskController = mock(),
+            commandQueue = commandQueue,
+            isEnabled = isEnabled,
+        )
+    }
+
+    @Test
+    fun initialize_shouldAddCallbacks() {
+        createNoteTaskInitializer().initialize()
+
+        verify(commandQueue).addCallback(any())
+    }
+
+    @Test
+    fun initialize_flagDisabled_shouldDoNothing() {
+        createNoteTaskInitializer(isEnabled = false).initialize()
+
+        verify(commandQueue, never()).addCallback(any())
+    }
+
+    @Test
+    fun initialize_floatingTasksNotPresent_shouldDoNothing() {
+        whenever(optionalFloatingTasks.isPresent).thenReturn(false)
+
+        createNoteTaskInitializer().initialize()
+
+        verify(commandQueue, never()).addCallback(any())
+    }
+}

packages/SystemUI/tests/src/com/android/systemui/notetask/NoteTaskIntentResolverTest.kt

@@ -0,0 +1,222 @@
+/*
+ * Copyright (C) 2022 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.notetask
+
+import android.content.ComponentName
+import android.content.Intent
+import android.content.pm.ActivityInfo
+import android.content.pm.ApplicationInfo
+import android.content.pm.PackageManager
+import android.content.pm.PackageManager.ResolveInfoFlags
+import android.content.pm.ResolveInfo
+import android.content.pm.ServiceInfo
+import android.test.suitebuilder.annotation.SmallTest
+import androidx.test.runner.AndroidJUnit4
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.notetask.NoteTaskIntentResolver.Companion.NOTES_ACTION
+import com.android.systemui.util.mockito.whenever
+import com.google.common.truth.Truth.assertThat
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.Mock
+import org.mockito.Mockito.any
+import org.mockito.MockitoAnnotations
+
+/**
+ * Tests for [NoteTaskIntentResolver].
+ *
+ * Build/Install/Run:
+ * - atest SystemUITests:NoteTaskIntentResolverTest
+ */
+@SmallTest
+@RunWith(AndroidJUnit4::class)
+internal class NoteTaskIntentResolverTest : SysuiTestCase() {
+
+    @Mock lateinit var packageManager: PackageManager
+
+    private lateinit var resolver: NoteTaskIntentResolver
+
+    @Before
+    fun setUp() {
+        MockitoAnnotations.initMocks(this)
+        resolver = NoteTaskIntentResolver(packageManager)
+    }
+
+    private fun createResolveInfo(
+        packageName: String = "PackageName",
+        activityInfo: ActivityInfo? = null,
+    ): ResolveInfo {
+        return ResolveInfo().apply {
+            serviceInfo =
+                ServiceInfo().apply {
+                    applicationInfo = ApplicationInfo().apply { this.packageName = packageName }
+                }
+            this.activityInfo = activityInfo
+        }
+    }
+
+    private fun createActivityInfo(
+        name: String? = "ActivityName",
+        exported: Boolean = true,
+        enabled: Boolean = true,
+        showWhenLocked: Boolean = true,
+        turnScreenOn: Boolean = true,
+    ): ActivityInfo {
+        return ActivityInfo().apply {
+            this.name = name
+            this.exported = exported
+            this.enabled = enabled
+            if (showWhenLocked) {
+                flags = flags or ActivityInfo.FLAG_SHOW_WHEN_LOCKED
+            }
+            if (turnScreenOn) {
+                flags = flags or ActivityInfo.FLAG_TURN_SCREEN_ON
+            }
+        }
+    }
+
+    private fun givenQueryIntentActivities(block: () -> List<ResolveInfo>) {
+        whenever(packageManager.queryIntentActivities(any(), any<ResolveInfoFlags>()))
+            .thenReturn(block())
+    }
+
+    private fun givenResolveActivity(block: () -> ResolveInfo?) {
+        whenever(packageManager.resolveActivity(any(), any<ResolveInfoFlags>())).thenReturn(block())
+    }
+
+    @Test
+    fun resolveIntent_shouldReturnNotesIntent() {
+        givenQueryIntentActivities { listOf(createResolveInfo()) }
+        givenResolveActivity { createResolveInfo(activityInfo = createActivityInfo()) }
+
+        val actual = resolver.resolveIntent()
+
+        val expected =
+            Intent(NOTES_ACTION)
+                .setComponent(ComponentName("PackageName", "ActivityName"))
+                .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+        // Compares the string representation of both intents, as they are different instances.
+        assertThat(actual.toString()).isEqualTo(expected.toString())
+    }
+
+    @Test
+    fun resolveIntent_activityInfoEnabledIsFalse_shouldReturnNull() {
+        givenQueryIntentActivities { listOf(createResolveInfo()) }
+        givenResolveActivity {
+            createResolveInfo(activityInfo = createActivityInfo(enabled = false))
+        }
+
+        val actual = resolver.resolveIntent()
+
+        assertThat(actual).isNull()
+    }
+
+    @Test
+    fun resolveIntent_activityInfoExportedIsFalse_shouldReturnNull() {
+        givenQueryIntentActivities { listOf(createResolveInfo()) }
+        givenResolveActivity {
+            createResolveInfo(activityInfo = createActivityInfo(exported = false))
+        }
+
+        val actual = resolver.resolveIntent()
+
+        assertThat(actual).isNull()
+    }
+
+    @Test
+    fun resolveIntent_activityInfoShowWhenLockedIsFalse_shouldReturnNull() {
+        givenQueryIntentActivities { listOf(createResolveInfo()) }
+        givenResolveActivity {
+            createResolveInfo(activityInfo = createActivityInfo(showWhenLocked = false))
+        }
+
+        val actual = resolver.resolveIntent()
+
+        assertThat(actual).isNull()
+    }
+
+    @Test
+    fun resolveIntent_activityInfoTurnScreenOnIsFalse_shouldReturnNull() {
+        givenQueryIntentActivities { listOf(createResolveInfo()) }
+        givenResolveActivity {
+            createResolveInfo(activityInfo = createActivityInfo(turnScreenOn = false))
+        }
+
+        val actual = resolver.resolveIntent()
+
+        assertThat(actual).isNull()
+    }
+
+    @Test
+    fun resolveIntent_activityInfoNameIsBlank_shouldReturnNull() {
+        givenQueryIntentActivities { listOf(createResolveInfo()) }
+        givenResolveActivity { createResolveInfo(activityInfo = createActivityInfo(name = "")) }
+
+        val actual = resolver.resolveIntent()
+
+        assertThat(actual).isNull()
+    }
+
+    @Test
+    fun resolveIntent_activityInfoNameIsNull_shouldReturnNull() {
+        givenQueryIntentActivities { listOf(createResolveInfo()) }
+        givenResolveActivity { createResolveInfo(activityInfo = createActivityInfo(name = null)) }
+
+        val actual = resolver.resolveIntent()
+
+        assertThat(actual).isNull()
+    }
+
+    @Test
+    fun resolveIntent_activityInfoIsNull_shouldReturnNull() {
+        givenQueryIntentActivities { listOf(createResolveInfo()) }
+        givenResolveActivity { createResolveInfo(activityInfo = null) }
+
+        val actual = resolver.resolveIntent()
+
+        assertThat(actual).isNull()
+    }
+
+    @Test
+    fun resolveIntent_resolveActivityIsNull_shouldReturnNull() {
+        givenQueryIntentActivities { listOf(createResolveInfo()) }
+        givenResolveActivity { null }
+
+        val actual = resolver.resolveIntent()
+
+        assertThat(actual).isNull()
+    }
+
+    @Test
+    fun resolveIntent_packageNameIsBlank_shouldReturnNull() {
+        givenQueryIntentActivities { listOf(createResolveInfo(packageName = "")) }
+
+        val actual = resolver.resolveIntent()
+
+        assertThat(actual).isNull()
+    }
+
+    @Test
+    fun resolveIntent_activityNotFoundForAction_shouldReturnNull() {
+        givenQueryIntentActivities { emptyList() }
+
+        val actual = resolver.resolveIntent()
+
+        assertThat(actual).isNull()
+    }
+}

packages/SystemUI/tests/src/com/android/systemui/wmshell/WMShellTest.java

@@ -28,6 +28,7 @@ import com.android.systemui.SysuiTestCase;
 import com.android.systemui.keyguard.ScreenLifecycle;
 import com.android.systemui.keyguard.WakefulnessLifecycle;
 import com.android.systemui.model.SysUiState;
+import com.android.systemui.notetask.NoteTaskInitializer;
 import com.android.systemui.settings.UserTracker;
 import com.android.systemui.statusbar.CommandQueue;
 import com.android.systemui.statusbar.policy.ConfigurationController;
@@ -36,7 +37,6 @@ import com.android.systemui.tracing.ProtoTracer;
 import com.android.wm.shell.common.ShellExecutor;
 import com.android.wm.shell.desktopmode.DesktopMode;
 import com.android.wm.shell.desktopmode.DesktopModeTaskRepository;
-import com.android.wm.shell.floating.FloatingTasks;
 import com.android.wm.shell.onehanded.OneHanded;
 import com.android.wm.shell.onehanded.OneHandedEventCallback;
 import com.android.wm.shell.onehanded.OneHandedTransitionCallback;
@@ -78,18 +78,31 @@ public class WMShellTest extends SysuiTestCase {
     @Mock ProtoTracer mProtoTracer;
     @Mock UserTracker mUserTracker;
     @Mock ShellExecutor mSysUiMainExecutor;
-    @Mock FloatingTasks mFloatingTasks;
+    @Mock NoteTaskInitializer mNoteTaskInitializer;
     @Mock DesktopMode mDesktopMode;
 
     @Before
     public void setUp() {
         MockitoAnnotations.initMocks(this);
-        mWMShell = new WMShell(mContext, mShellInterface, Optional.of(mPip),
-                Optional.of(mSplitScreen), Optional.of(mOneHanded), Optional.of(mFloatingTasks),
+        mWMShell = new WMShell(
+                mContext,
+                mShellInterface,
+                Optional.of(mPip),
+                Optional.of(mSplitScreen),
+                Optional.of(mOneHanded),
                 Optional.of(mDesktopMode),
-                mCommandQueue, mConfigurationController, mKeyguardStateController,
-                mKeyguardUpdateMonitor, mScreenLifecycle, mSysUiState, mProtoTracer,
-                mWakefulnessLifecycle, mUserTracker, mSysUiMainExecutor);
+                mCommandQueue,
+                mConfigurationController,
+                mKeyguardStateController,
+                mKeyguardUpdateMonitor,
+                mScreenLifecycle,
+                mSysUiState,
+                mProtoTracer,
+                mWakefulnessLifecycle,
+                mUserTracker,
+                mNoteTaskInitializer,
+                mSysUiMainExecutor
+        );
     }
 
     @Test

services/core/java/com/android/server/policy/PhoneWindowManager.java

@@ -4052,6 +4052,9 @@ public class PhoneWindowManager implements WindowManagerPolicy {
             case KeyEvent.KEYCODE_DEMO_APP_2:
             case KeyEvent.KEYCODE_DEMO_APP_3:
             case KeyEvent.KEYCODE_DEMO_APP_4: {
+                // TODO(b/254604589): Dispatch KeyEvent to System UI.
+                sendSystemKeyToStatusBarAsync(keyCode);
+
                 // Just drop if keys are not intercepted for direct key.
                 result &= ~ACTION_PASS_TO_USER;
                 break;