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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.settings.development;
     18 
     19 import android.content.Context;
     20 import android.provider.Settings;
     21 import android.support.annotation.VisibleForTesting;
     22 import android.support.v14.preference.SwitchPreference;
     23 import android.support.v7.preference.Preference;
     24 
     25 import com.android.settings.core.PreferenceControllerMixin;
     26 import com.android.settingslib.development.DeveloperOptionsPreferenceController;
     27 
     28 public class TetheringHardwareAccelPreferenceController extends DeveloperOptionsPreferenceController
     29         implements Preference.OnPreferenceChangeListener, PreferenceControllerMixin {
     30 
     31     private static final String TETHERING_HARDWARE_OFFLOAD = "tethering_hardware_offload";
     32 
     33     // We use the "disabled status" in code, but show the opposite text
     34     // on screen. So a value 0 indicates the tethering hardware accel is enabled.
     35     @VisibleForTesting
     36     static final int SETTING_VALUE_ON = 0;
     37     @VisibleForTesting
     38     static final int SETTING_VALUE_OFF = 1;
     39 
     40     public TetheringHardwareAccelPreferenceController(Context context) {
     41         super(context);
     42     }
     43 
     44     @Override
     45     public String getPreferenceKey() {
     46         return TETHERING_HARDWARE_OFFLOAD;
     47     }
     48 
     49     @Override
     50     public boolean onPreferenceChange(Preference preference, Object newValue) {
     51         final boolean isEnabled = (Boolean) newValue;
     52         Settings.Global.putInt(mContext.getContentResolver(),
     53                 Settings.Global.TETHER_OFFLOAD_DISABLED,
     54                 isEnabled ? SETTING_VALUE_ON : SETTING_VALUE_OFF);
     55         return true;
     56     }
     57 
     58     @Override
     59     public void updateState(Preference preference) {
     60         final int tetheringMode = Settings.Global.getInt(
     61                 mContext.getContentResolver(),
     62                 Settings.Global.TETHER_OFFLOAD_DISABLED, 0 /* default */);
     63         ((SwitchPreference) mPreference).setChecked(tetheringMode != SETTING_VALUE_OFF);
     64     }
     65 
     66     @Override
     67     protected void onDeveloperOptionsSwitchDisabled() {
     68         super.onDeveloperOptionsSwitchDisabled();
     69         Settings.Global.putInt(mContext.getContentResolver(),
     70                 Settings.Global.TETHER_OFFLOAD_DISABLED, SETTING_VALUE_OFF);
     71         ((SwitchPreference) mPreference).setChecked(false);
     72     }
     73 }
     74