Add more gesture setting pages.

Bug: 32637613
Test: make -j40 RunSettingsRoboTests
Change-Id: I77f90b8b7e3348ed717ee78693860f48e13070f2

src/com/android/settings/gestures/DoubleTwistPreferenceController.java

@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2016 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.gestures;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.hardware.Sensor;
+import android.hardware.SensorManager;
+import android.provider.Settings;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.TwoStatePreference;
+import android.text.TextUtils;
+
+import com.android.settings.R;
+import com.android.settings.core.PreferenceController;
+
+public class DoubleTwistPreferenceController extends PreferenceController
+        implements Preference.OnPreferenceChangeListener {
+
+    private static final String PREF_KEY_DOUBLE_TWIST = "gesture_double_twist";
+
+    public DoubleTwistPreferenceController(Context context) {
+        super(context);
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return hasSensor(R.string.gesture_double_twist_sensor_name,
+                R.string.gesture_double_twist_sensor_vendor);
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        final boolean isEnabled = isDoubleTwistEnabled();
+        if (preference != null) {
+            if (preference instanceof TwoStatePreference) {
+                ((TwoStatePreference) preference).setChecked(isEnabled);
+            } else {
+                preference.setSummary(isEnabled
+                        ? com.android.settings.R.string.gesture_setting_on
+                        : com.android.settings.R.string.gesture_setting_off);
+            }
+        }
+    }
+
+    @Override
+    public boolean handlePreferenceTreeClick(Preference preference) {
+        return false;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return PREF_KEY_DOUBLE_TWIST;
+    }
+
+    private boolean isDoubleTwistEnabled() {
+        final int doubleTwistEnabled = Settings.Secure.getInt(mContext.getContentResolver(),
+                Settings.Secure.CAMERA_DOUBLE_TWIST_TO_FLIP_ENABLED, 1);
+        return doubleTwistEnabled != 0;
+    }
+
+    private boolean hasSensor(int nameResId, int vendorResId) {
+        final Resources resources = mContext.getResources();
+        final String name = resources.getString(nameResId);
+        final String vendor = resources.getString(vendorResId);
+        if (!TextUtils.isEmpty(name) && !TextUtils.isEmpty(vendor)) {
+            final SensorManager sensorManager =
+                    (SensorManager) mContext.getSystemService(Context.SENSOR_SERVICE);
+            for (Sensor s : sensorManager.getSensorList(Sensor.TYPE_ALL)) {
+                if (name.equals(s.getName()) && vendor.equals(s.getVendor())) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        final boolean enabled = (boolean) newValue;
+        Settings.Secure.putInt(mContext.getContentResolver(),
+                Settings.Secure.CAMERA_DOUBLE_TWIST_TO_FLIP_ENABLED, enabled ? 1 : 0);
+        return true;
+    }
+}