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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
      5  * except in compliance with the License. You may obtain a copy of the License at
      6  *
      7  *      http://www.apache.org/licenses/LICENSE-2.0
      8  *
      9  * Unless required by applicable law or agreed to in writing, software distributed under the
     10  * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     11  * KIND, either express or implied. See the License for the specific language governing
     12  * permissions and limitations under the License.
     13  */
     14 package com.android.settings.display;
     15 
     16 import android.app.ActivityManager;
     17 import android.content.Context;
     18 import android.content.pm.PackageManager;
     19 import android.provider.Settings;
     20 import android.support.v7.preference.Preference;
     21 
     22 import com.android.settings.R;
     23 import com.android.settings.core.PreferenceControllerMixin;
     24 import com.android.settingslib.core.AbstractPreferenceController;
     25 
     26 public class VrDisplayPreferenceController extends AbstractPreferenceController implements
     27         PreferenceControllerMixin {
     28 
     29     private static final String KEY_VR_DISPLAY_PREF = "vr_display_pref";
     30 
     31     public VrDisplayPreferenceController(Context context) {
     32         super(context);
     33     }
     34 
     35     @Override
     36     public boolean isAvailable() {
     37         final PackageManager pm = mContext.getPackageManager();
     38         return pm.hasSystemFeature(PackageManager.FEATURE_VR_MODE_HIGH_PERFORMANCE);
     39     }
     40 
     41     @Override
     42     public String getPreferenceKey() {
     43         return KEY_VR_DISPLAY_PREF;
     44     }
     45 
     46     @Override
     47     public void updateState(Preference preference) {
     48         int currentUser = ActivityManager.getCurrentUser();
     49         int current = Settings.Secure.getIntForUser(mContext.getContentResolver(),
     50                 Settings.Secure.VR_DISPLAY_MODE, Settings.Secure.VR_DISPLAY_MODE_LOW_PERSISTENCE,
     51                 currentUser);
     52         if (current == 0) {
     53             preference.setSummary(R.string.display_vr_pref_low_persistence);
     54         } else {
     55             preference.setSummary(R.string.display_vr_pref_off);
     56         }
     57     }
     58 }
     59