Add new touch and notification vibration intensity settings.

Bug: 64185329
Test: ROBOTEST_FILTER=VibrationSettingsTest m -j RunSettingsRoboTests
Change-Id: I449c7e0041aabfe48935a57cde93e8af77dcd783

src/com/android/settings/accessibility/VibrationSettings.java

@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2018 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.accessibility;
+
+import android.content.Context;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.Vibrator;
+import android.provider.SearchIndexableResource;
+import android.provider.Settings;
+import android.support.annotation.VisibleForTesting;
+import android.support.v7.preference.Preference;
+
+import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
+import com.android.settings.R;
+import com.android.settings.SettingsPreferenceFragment;
+import com.android.settings.search.BaseSearchIndexProvider;
+import com.android.settings.search.Indexable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Activity with the accessibility settings.
+ */
+public class VibrationSettings extends SettingsPreferenceFragment implements Indexable {
+
+    // Preferences
+    @VisibleForTesting
+    static final String NOTIFICATION_VIBRATION_PREFERENCE_SCREEN =
+            "notification_vibration_preference_screen";
+    @VisibleForTesting
+    static final String TOUCH_VIBRATION_PREFERENCE_SCREEN =
+            "touch_vibration_preference_screen";
+
+    private final Handler mHandler = new Handler();
+    private final SettingsContentObserver mSettingsContentObserver;
+
+    private Preference mNotificationVibrationPreferenceScreen;
+    private Preference mTouchVibrationPreferenceScreen;
+
+    public VibrationSettings() {
+        List<String> vibrationSettings = new ArrayList<>();
+        vibrationSettings.add(Settings.System.HAPTIC_FEEDBACK_INTENSITY);
+        vibrationSettings.add(Settings.System.NOTIFICATION_VIBRATION_INTENSITY);
+        mSettingsContentObserver = new SettingsContentObserver(mHandler, vibrationSettings) {
+            @Override
+            public void onChange(boolean selfChange, Uri uri) {
+                updatePreferences();
+            }
+        };
+    }
+
+    @Override
+    public int getMetricsCategory() {
+        return MetricsEvent.ACCESSIBILITY_VIBRATION;
+    }
+
+    @Override
+    public void onCreate(Bundle icicle) {
+        super.onCreate(icicle);
+        addPreferencesFromResource(R.xml.accessibility_vibration_settings);
+        initializePreferences();
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        updatePreferences();
+        mSettingsContentObserver.register(getContentResolver());
+    }
+
+    @Override
+    public void onPause() {
+        mSettingsContentObserver.unregister(getContentResolver());
+        super.onPause();
+    }
+
+    private void initializePreferences() {
+        // Notification and notification vibration strength adjustments.
+        mNotificationVibrationPreferenceScreen =
+                findPreference(NOTIFICATION_VIBRATION_PREFERENCE_SCREEN);
+
+        // Touch feedback strength adjustments.
+        mTouchVibrationPreferenceScreen = findPreference(TOUCH_VIBRATION_PREFERENCE_SCREEN);
+    }
+
+    private void updatePreferences() {
+        updateNotificationVibrationSummary(mNotificationVibrationPreferenceScreen);
+        updateTouchVibrationSummary(mTouchVibrationPreferenceScreen);
+    }
+
+    private void updateNotificationVibrationSummary(Preference pref) {
+        Vibrator vibrator = getContext().getSystemService(Vibrator.class);
+        final int intensity = Settings.System.getInt(getContext().getContentResolver(),
+                Settings.System.NOTIFICATION_VIBRATION_INTENSITY,
+                vibrator.getDefaultNotificationVibrationIntensity());
+        CharSequence summary = getVibrationIntensitySummary(getContext(), intensity);
+        mNotificationVibrationPreferenceScreen.setSummary(summary);
+    }
+
+    private void updateTouchVibrationSummary(Preference pref) {
+        Vibrator vibrator = getContext().getSystemService(Vibrator.class);
+        final int intensity = Settings.System.getInt(getContext().getContentResolver(),
+                Settings.System.HAPTIC_FEEDBACK_INTENSITY,
+                vibrator.getDefaultHapticFeedbackIntensity());
+        CharSequence summary = getVibrationIntensitySummary(getContext(), intensity);
+        mTouchVibrationPreferenceScreen.setSummary(summary);
+    }
+
+    public static String getVibrationIntensitySummary(Context context, int intensity) {
+        switch (intensity) {
+            case Vibrator.VIBRATION_INTENSITY_OFF:
+                return context.getString(R.string.accessibility_vibration_intensity_off);
+            case Vibrator.VIBRATION_INTENSITY_LOW:
+                return context.getString(R.string.accessibility_vibration_intensity_low);
+            case Vibrator.VIBRATION_INTENSITY_MEDIUM:
+                return context.getString(R.string.accessibility_vibration_intensity_medium);
+            case Vibrator.VIBRATION_INTENSITY_HIGH:
+                return context.getString(R.string.accessibility_vibration_intensity_high);
+            default:
+                return "";
+        }
+    }
+
+    public static final SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
+            new BaseSearchIndexProvider() {
+                @Override
+                public List<SearchIndexableResource> getXmlResourcesToIndex(Context context,
+                        boolean enabled) {
+                    List<SearchIndexableResource> indexables = new ArrayList<>();
+                    SearchIndexableResource indexable = new SearchIndexableResource(context);
+                    indexable.xmlResId = R.xml.accessibility_vibration_settings;
+                    indexables.add(indexable);
+                    return indexables;
+                }
+            };
+}