Snap for 8261343 from 73b858db47 to tm-release

Change-Id: I56a299702d8c3f4e0ec891c923ab405c798ed8ac

res/color/dream_card_icon_color_state_list.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ 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.
+  -->
+
+<selector xmlns:android="http://schemas.android.com/apk/res/android"
+          xmlns:androidprv="http://schemas.android.com/apk/prv/res/android">
+    <item android:state_selected="true" android:color="?androidprv:attr/textColorOnAccent"/>
+    <item android:color="?androidprv:attr/colorAccentPrimaryVariant"/>
+</selector>

res/values/strings.xml

@@ -12317,6 +12317,14 @@
     <!-- Location setting: preference summary - describes the behavior of forcing full raw GNSS satellite measurements [CHAR LIMIT=NONE] -->
     <string name="enable_gnss_raw_meas_full_tracking_summary">Track all GNSS constellations and frequencies with no duty cycling</string>
 
+    <!-- Developer options Input method category strings -->
+    <!-- Title for input method category [CHAR LIMIT=30]-->
+    <string name="input_method_category">Input Method</string>
+    <!-- [CHAR LIMIT=30] Title for Stylus handwriting settings -->
+    <string name="stylus_handwriting">Stylus handwriting</string>
+    <!-- [CHAR LIMIT=130] Summary for Stylus handwriting toggle -->
+    <string name="stylus_handwriting_summary">When enabled, current Input method receives stylus MotionEvent if an Editor is focused.</string>
+
     <!-- Name of setting for switching device theme [CHAR LIMIT=60] -->
     <string name="device_theme">Device theme</string>
     <!-- Name of default device theme [CHAR LIMIT=60] -->

res/xml/development_settings.xml

@@ -709,4 +709,15 @@
             android:key="location_indicator_settings"
             settings:controller="com.android.settings.location.LocationIndicatorsPreferenceController"/>
     </PreferenceCategory>
+
+    <PreferenceCategory
+        android:key="input_method_category"
+        android:title="@string/input_method_category"
+        android:order="1400">
+
+        <SwitchPreference
+            android:key="stylus_handwriting"
+            android:title="@string/stylus_handwriting"
+            android:summary="@string/stylus_handwriting_summary" />
+    </PreferenceCategory>
 </PreferenceScreen>

src/com/android/settings/dashboard/ControllerFutureTask.java

@@ -1,36 +0,0 @@
-/*
- * Copyright (C) 2019 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.settings.dashboard;
-
-import com.android.settingslib.core.AbstractPreferenceController;
-
-import java.util.concurrent.FutureTask;
-
-/**
- *  {@link FutureTask} of the Controller.
- */
-public class ControllerFutureTask extends FutureTask<Void> {
-    private final AbstractPreferenceController mController;
-
-    public ControllerFutureTask(ControllerTask task, Void result) {
-        super(task, result);
-        mController = task.getController();
-    }
-
-    AbstractPreferenceController getController() {
-        return mController;
-    }
-}

src/com/android/settings/dashboard/ControllerTask.java

@@ -1,90 +0,0 @@
-/*
- * Copyright (C) 2019 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.settings.dashboard;
-
-import android.app.settings.SettingsEnums;
-import android.os.SystemClock;
-import android.text.TextUtils;
-import android.util.Log;
-
-import androidx.preference.Preference;
-import androidx.preference.PreferenceScreen;
-
-import com.android.settingslib.core.AbstractPreferenceController;
-import com.android.settingslib.core.instrumentation.MetricsFeatureProvider;
-import com.android.settingslib.utils.ThreadUtils;
-
-/**
- * A {@link Runnable} controller task. This task handle the visibility of the controller in the
- * background. Also handle the state updating in the main thread.
- */
-public class ControllerTask implements Runnable {
-    private static final String TAG = "ControllerTask";
-    private static final int CONTROLLER_UPDATESTATE_TIME_THRESHOLD = 50;
-
-    private final AbstractPreferenceController mController;
-    private final PreferenceScreen mScreen;
-    private final int mMetricsCategory;
-    private final MetricsFeatureProvider mMetricsFeature;
-
-    public ControllerTask(AbstractPreferenceController controller, PreferenceScreen screen,
-            MetricsFeatureProvider metricsFeature, int metricsCategory) {
-        mController = controller;
-        mScreen = screen;
-        mMetricsFeature = metricsFeature;
-        mMetricsCategory = metricsCategory;
-    }
-
-    @Override
-    public void run() {
-        if (!mController.isAvailable()) {
-            return;
-        }
-
-        final String key = mController.getPreferenceKey();
-        if (TextUtils.isEmpty(key)) {
-            Log.d(TAG, String.format("Preference key is %s in Controller %s",
-                    key, mController.getClass().getSimpleName()));
-            return;
-        }
-
-        final Preference preference = mScreen.findPreference(key);
-        if (preference == null) {
-            Log.d(TAG, String.format("Cannot find preference with key %s in Controller %s",
-                    key, mController.getClass().getSimpleName()));
-            return;
-        }
-        ThreadUtils.postOnMainThread(() -> {
-            final long t = SystemClock.elapsedRealtime();
-            mController.updateState(preference);
-            final int elapsedTime = (int) (SystemClock.elapsedRealtime() - t);
-            if (elapsedTime > CONTROLLER_UPDATESTATE_TIME_THRESHOLD) {
-                Log.w(TAG, "The updateState took " + elapsedTime + " ms in Controller "
-                        + mController.getClass().getSimpleName());
-                if (mMetricsFeature != null) {
-                    mMetricsFeature.action(SettingsEnums.PAGE_UNKNOWN,
-                            SettingsEnums.ACTION_CONTROLLER_UPDATE_STATE, mMetricsCategory,
-                            mController.getClass().getSimpleName(), elapsedTime);
-                }
-            }
-        });
-    }
-
-    AbstractPreferenceController getController() {
-        return mController;
-    }
-}

src/com/android/settings/dashboard/DashboardFragment.java

@@ -48,7 +48,6 @@ import com.android.settingslib.drawer.DashboardCategory;
 import com.android.settingslib.drawer.ProviderTile;
 import com.android.settingslib.drawer.Tile;
 import com.android.settingslib.search.Indexable;
-import com.android.settingslib.utils.ThreadUtils;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -58,7 +57,6 @@ import java.util.List;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Set;
-import java.util.concurrent.ExecutionException;
 
 /**
  * Base fragment for dashboard style UI containing a list of static and dynamic setting items.
@@ -222,7 +220,7 @@ public abstract class DashboardFragment extends SettingsPreferenceFragment
         super.onResume();
         updatePreferenceStates();
         writeElapsedTimeMetric(SettingsEnums.ACTION_DASHBOARD_VISIBLE_TIME,
-                "isParalleledControllers:" + isParalleledControllers());
+                "isParalleledControllers:false");
     }
 
     @Override
@@ -348,14 +346,6 @@ public abstract class DashboardFragment extends SettingsPreferenceFragment
                 controller -> controller.displayPreference(screen));
     }
 
-    /**
-     * @return {@code true} if the underlying controllers should be executed in parallel.
-     * Override this function to enable/disable the behavior.
-     */
-    protected boolean isParalleledControllers() {
-        return false;
-    }
-
     /**
      * Get current PreferenceController(s)
      */
@@ -394,36 +384,6 @@ public abstract class DashboardFragment extends SettingsPreferenceFragment
         }
     }
 
-    /**
-     * Use parallel method to update state of each preference managed by PreferenceController.
-     */
-    @VisibleForTesting
-    // To use this parallel approach will cause the side effect of the UI flicker. Such as
-    // the thumb sliding of the toggle button.
-    void updatePreferenceStatesInParallel() {
-        final PreferenceScreen screen = getPreferenceScreen();
-        final Collection<List<AbstractPreferenceController>> controllerLists =
-                mPreferenceControllers.values();
-        final List<ControllerFutureTask> taskList = new ArrayList<>();
-        for (List<AbstractPreferenceController> controllerList : controllerLists) {
-            for (AbstractPreferenceController controller : controllerList) {
-                final ControllerFutureTask task = new ControllerFutureTask(
-                        new ControllerTask(controller, screen, mMetricsFeatureProvider,
-                                getMetricsCategory()), null /* result */);
-                taskList.add(task);
-                ThreadUtils.postOnBackgroundThread(task);
-            }
-        }
-
-        for (ControllerFutureTask task : taskList) {
-            try {
-                task.get();
-            } catch (InterruptedException | ExecutionException e) {
-                Log.w(TAG, task.getController().getPreferenceKey() + " " + e.getMessage());
-            }
-        }
-    }
-
     /**
      * Refresh all preference items, including both static prefs from xml, and dynamic items from
      * DashboardCategory.

src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java

@@ -582,6 +582,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
                 bluetoothA2dpConfigStore, fragment));
         controllers.add(new SharedDataPreferenceController(context));
         controllers.add(new OverlaySettingsPreferenceController(context));
+        controllers.add(new StylusHandwritingPreferenceController(context));
 
         return controllers;
     }

src/com/android/settings/development/StylusHandwritingPreferenceController.java

@@ -0,0 +1,69 @@
+/*
+ * 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.settings.development;
+
+import android.content.Context;
+import android.provider.Settings;
+
+import androidx.preference.Preference;
+import androidx.preference.SwitchPreference;
+
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settingslib.development.DeveloperOptionsPreferenceController;
+
+class StylusHandwritingPreferenceController extends DeveloperOptionsPreferenceController
+        implements Preference.OnPreferenceChangeListener, PreferenceControllerMixin {
+
+    static final int SETTING_VALUE_ON = 1;
+    static final int SETTING_VALUE_OFF = 0;
+
+    private static final String STYLUS_HANDWRITING_OPTIONS_KEY = "stylus_handwriting";
+
+    StylusHandwritingPreferenceController(Context context) {
+        super(context);
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return STYLUS_HANDWRITING_OPTIONS_KEY;
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        final boolean isEnabled = (Boolean) newValue;
+        Settings.Global.putInt(mContext.getContentResolver(),
+                Settings.Global.STYLUS_HANDWRITING_ENABLED,
+                isEnabled ? SETTING_VALUE_ON : SETTING_VALUE_OFF);
+
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        final int enable = Settings.Global.getInt(mContext.getContentResolver(),
+                Settings.Global.STYLUS_HANDWRITING_ENABLED, SETTING_VALUE_OFF);
+        ((SwitchPreference) mPreference).setChecked(enable != SETTING_VALUE_OFF);
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchDisabled() {
+        super.onDeveloperOptionsSwitchDisabled();
+        Settings.Global.putInt(mContext.getContentResolver(),
+                Settings.Global.STYLUS_HANDWRITING_ENABLED, SETTING_VALUE_OFF);
+        ((SwitchPreference) mPreference).setChecked(false);
+    }
+}

src/com/android/settings/dream/DreamAdapter.java

@@ -84,6 +84,9 @@ public class DreamAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>
                 mPreviewView.setImageDrawable(previewImage);
                 mPreviewView.setClipToOutline(true);
                 mPreviewPlaceholderView.setVisibility(View.GONE);
+            } else {
+                mPreviewView.setImageDrawable(null);
+                mPreviewPlaceholderView.setVisibility(View.VISIBLE);
             }
 
             final Drawable icon = item.isActive()
@@ -91,7 +94,7 @@ public class DreamAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>
                     : item.getIcon();
             if (icon instanceof VectorDrawable) {
                 icon.setTintList(
-                        mContext.getColorStateList(R.color.dream_card_text_color_state_list));
+                        mContext.getColorStateList(R.color.dream_card_icon_color_state_list));
             }
             final int iconSize = mContext.getResources().getDimensionPixelSize(
                     R.dimen.dream_item_icon_size);

tests/robotests/src/com/android/settings/dashboard/ControllerFutureTaskTest.java

@@ -1,71 +0,0 @@
-/*
- * Copyright (C) 2019 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.settings.dashboard;
-
-import static com.android.settingslib.core.instrumentation.Instrumentable.METRICS_CATEGORY_UNKNOWN;
-
-import static com.google.common.truth.Truth.assertThat;
-
-import android.content.Context;
-
-import androidx.preference.PreferenceManager;
-import androidx.preference.PreferenceScreen;
-
-import com.android.settings.core.BasePreferenceController;
-
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.robolectric.RobolectricTestRunner;
-import org.robolectric.RuntimeEnvironment;
-
-@RunWith(RobolectricTestRunner.class)
-public class ControllerFutureTaskTest {
-    private static final String KEY = "my_key";
-
-    private Context mContext;
-    private TestPreferenceController mTestController;
-    private PreferenceScreen mScreen;
-
-    @Before
-    public void setUp() {
-        mContext = RuntimeEnvironment.application;
-        mTestController = new TestPreferenceController(mContext, KEY);
-        final PreferenceManager preferenceManager = new PreferenceManager(mContext);
-        mScreen = preferenceManager.createPreferenceScreen(mContext);
-    }
-
-    @Test
-    public void getController_addTask_checkControllerKey() {
-        final ControllerFutureTask futureTask = new ControllerFutureTask(
-                new ControllerTask(mTestController, mScreen, null /* metricsFeature */,
-                        METRICS_CATEGORY_UNKNOWN), null /* result */);
-
-        assertThat(futureTask.getController().getPreferenceKey()).isEqualTo(KEY);
-    }
-
-
-    static class TestPreferenceController extends BasePreferenceController {
-        TestPreferenceController(Context context, String preferenceKey) {
-            super(context, preferenceKey);
-        }
-
-        @Override
-        public int getAvailabilityStatus() {
-            return AVAILABLE;
-        }
-    }
-}

tests/robotests/src/com/android/settings/dashboard/ControllerTaskTest.java

@@ -1,124 +0,0 @@
-/*
- * Copyright (C) 2019 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.settings.dashboard;
-
-import static com.android.settingslib.core.instrumentation.Instrumentable.METRICS_CATEGORY_UNKNOWN;
-
-import static org.mockito.ArgumentMatchers.any;
-import static org.mockito.Mockito.never;
-import static org.mockito.Mockito.spy;
-import static org.mockito.Mockito.verify;
-
-import android.content.Context;
-
-import androidx.preference.Preference;
-import androidx.preference.PreferenceManager;
-import androidx.preference.PreferenceScreen;
-
-import com.android.settingslib.core.AbstractPreferenceController;
-
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.robolectric.RobolectricTestRunner;
-import org.robolectric.RuntimeEnvironment;
-
-@RunWith(RobolectricTestRunner.class)
-public class ControllerTaskTest {
-    private static final String KEY = "my_key";
-
-    private Context mContext;
-    private PreferenceScreen mScreen;
-    private TestPreferenceController mTestController;
-    private ControllerTask mControllerTask;
-
-    @Before
-    public void setUp() {
-        mContext = RuntimeEnvironment.application;
-        final PreferenceManager preferenceManager = new PreferenceManager(mContext);
-        mScreen = preferenceManager.createPreferenceScreen(mContext);
-        mTestController = spy(new TestPreferenceController(mContext));
-        mControllerTask = new ControllerTask(mTestController, mScreen, null /* metricsFeature */,
-                METRICS_CATEGORY_UNKNOWN);
-    }
-
-    @Test
-    public void doRun_controlNotAvailable_noRunUpdateState() {
-        mTestController.setAvailable(false);
-
-        mControllerTask.run();
-
-        verify(mTestController, never()).updateState(any(Preference.class));
-    }
-
-    @Test
-    public void doRun_emptyKey_noRunUpdateState() {
-        mTestController.setKey("");
-
-        mControllerTask.run();
-
-        verify(mTestController, never()).updateState(any(Preference.class));
-    }
-
-    @Test
-    public void doRun_preferenceNotExist_noRunUpdateState() {
-        mTestController.setKey(KEY);
-
-        mControllerTask.run();
-
-        verify(mTestController, never()).updateState(any(Preference.class));
-    }
-
-    @Test
-    public void doRun_executeUpdateState() {
-        mTestController.setKey(KEY);
-        final Preference preference = new Preference(mContext);
-        preference.setKey(KEY);
-        mScreen.addPreference(preference);
-
-        mControllerTask.run();
-
-        verify(mTestController).updateState(any(Preference.class));
-    }
-
-    static class TestPreferenceController extends AbstractPreferenceController {
-        private boolean mAvailable;
-        private String mKey;
-
-        TestPreferenceController(Context context) {
-            super(context);
-            mAvailable = true;
-        }
-
-        @Override
-        public boolean isAvailable() {
-            return mAvailable;
-        }
-
-        @Override
-        public String getPreferenceKey() {
-            return mKey;
-        }
-
-        void setAvailable(boolean available) {
-            mAvailable = available;
-        }
-
-        void setKey(String key) {
-            mKey = key;
-        }
-    }
-}

tests/robotests/src/com/android/settings/dashboard/DashboardFragmentTest.java

@@ -390,7 +390,6 @@ public class DashboardFragmentTest {
         private final ContentResolver mContentResolver;
 
         public final PreferenceScreen mScreen;
-        private boolean mIsParalleled;
 
         public TestFragment(Context context) {
             mContext = context;
@@ -398,7 +397,6 @@ public class DashboardFragmentTest {
             mScreen = mock(PreferenceScreen.class);
             mContentResolver = mock(ContentResolver.class);
             mControllers = new ArrayList<>();
-            mIsParalleled = true;
 
             when(mPreferenceManager.getContext()).thenReturn(mContext);
             ReflectionHelpers.setField(
@@ -445,13 +443,6 @@ public class DashboardFragmentTest {
             return mContentResolver;
         }
 
-        protected boolean isParalleledControllers() {
-            return mIsParalleled;
-        }
-
-        void setUsingControllerEnhancement(boolean isParalleled) {
-            mIsParalleled = isParalleled;
-        }
     }
 
     private static class TestDynamicDataObserver extends DynamicDataObserver {

tests/robotests/src/com/android/settings/development/StylusHandwritingPreferenceControllerTest.java

@@ -0,0 +1,111 @@
+/*
+ * 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.settings.development;
+
+import static com.android.settings.development.StylusHandwritingPreferenceController.SETTING_VALUE_OFF;
+import static com.android.settings.development.StylusHandwritingPreferenceController.SETTING_VALUE_ON;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.provider.Settings;
+
+import androidx.preference.PreferenceScreen;
+import androidx.preference.SwitchPreference;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+
+@RunWith(RobolectricTestRunner.class)
+public class StylusHandwritingPreferenceControllerTest {
+
+    @Mock
+    private SwitchPreference mPreference;
+    @Mock
+    private PreferenceScreen mPreferenceScreen;
+
+    private Context mContext;
+    private StylusHandwritingPreferenceController mController;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        mContext = RuntimeEnvironment.application;
+        mController = new StylusHandwritingPreferenceController(mContext);
+        when(mPreferenceScreen.findPreference(mController.getPreferenceKey()))
+            .thenReturn(mPreference);
+        mController.displayPreference(mPreferenceScreen);
+    }
+
+    @Test
+    public void onPreferenceChange_settingEnabled_stylusHandwritingShouldBeOn() {
+        mController.onPreferenceChange(mPreference, true /* new value */);
+
+        final int mode = Settings.Global.getInt(mContext.getContentResolver(),
+                Settings.Global.STYLUS_HANDWRITING_ENABLED, -1 /* default */);
+
+        assertThat(mode).isEqualTo(SETTING_VALUE_ON);
+    }
+
+    @Test
+    public void onPreferenceChange_settingEnabled_stylusHandwritingShouldBeOff() {
+        mController.onPreferenceChange(mPreference, false /* new value */);
+
+        final int mode = Settings.Global.getInt(mContext.getContentResolver(),
+                Settings.Global.STYLUS_HANDWRITING_ENABLED, -1 /* default */);
+
+        assertThat(mode).isEqualTo(SETTING_VALUE_OFF);
+    }
+
+    @Test
+    public void updateState_settingDisabled_preferenceShouldNotBeChecked() {
+        Settings.Global.putInt(mContext.getContentResolver(),
+                Settings.Global.STYLUS_HANDWRITING_ENABLED, SETTING_VALUE_OFF);
+        mController.updateState(mPreference);
+
+        verify(mPreference).setChecked(false);
+    }
+
+    @Test
+    public void updateState_settingEnabled_preferenceShouldBeChecked() {
+        Settings.Global.putInt(mContext.getContentResolver(),
+                Settings.Global.STYLUS_HANDWRITING_ENABLED, SETTING_VALUE_ON);
+        mController.updateState(mPreference);
+
+        verify(mPreference).setChecked(true);
+    }
+
+    @Test
+    public void onDeveloperOptionsSwitchDisabled_shouldDisablePreference() {
+        mController.onDeveloperOptionsSwitchDisabled();
+
+        final int mode = Settings.Global.getInt(mContext.getContentResolver(),
+                Settings.Global.STYLUS_HANDWRITING_ENABLED, -1 /* default */);
+
+        assertThat(mode).isEqualTo(SETTING_VALUE_OFF);
+        verify(mPreference).setChecked(false);
+        verify(mPreference).setEnabled(false);
+    }
+}