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.featureflags; 18 19 import android.content.Context; 20 import android.support.v7.preference.PreferenceScreen; 21 import android.util.FeatureFlagUtils; 22 23 import com.android.settings.core.PreferenceControllerMixin; 24 import com.android.settingslib.core.AbstractPreferenceController; 25 import com.android.settingslib.core.lifecycle.Lifecycle; 26 import com.android.settingslib.core.lifecycle.LifecycleObserver; 27 import com.android.settingslib.core.lifecycle.events.OnStart; 28 29 import java.util.Map; 30 31 public class FeatureFlagsPreferenceController extends AbstractPreferenceController 32 implements PreferenceControllerMixin, LifecycleObserver, OnStart { 33 34 private PreferenceScreen mScreen; 35 FeatureFlagsPreferenceController(Context context, Lifecycle lifecycle)36 public FeatureFlagsPreferenceController(Context context, Lifecycle lifecycle) { 37 super(context); 38 if (lifecycle != null) { 39 lifecycle.addObserver(this); 40 } 41 } 42 43 @Override isAvailable()44 public boolean isAvailable() { 45 return true; 46 } 47 48 @Override getPreferenceKey()49 public String getPreferenceKey() { 50 return null; 51 } 52 53 @Override displayPreference(PreferenceScreen screen)54 public void displayPreference(PreferenceScreen screen) { 55 super.displayPreference(screen); 56 mScreen = screen; 57 } 58 59 @Override onStart()60 public void onStart() { 61 if (mScreen == null) { 62 return; 63 } 64 final Map<String, String> featureMap = FeatureFlagUtils.getAllFeatureFlags(); 65 if (featureMap == null) { 66 return; 67 } 68 mScreen.removeAll(); 69 final Context prefContext = mScreen.getContext(); 70 for (String feature : featureMap.keySet()) { 71 mScreen.addPreference(new FeatureFlagPreference(prefContext, feature)); 72 } 73 } 74 } 75