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 package com.android.settings.network; 17 18 import android.content.Context; 19 import android.net.NetworkScoreManager; 20 import android.net.NetworkScorerAppData; 21 import android.os.Bundle; 22 import android.support.annotation.VisibleForTesting; 23 import android.support.v7.preference.Preference; 24 import android.support.v7.preference.PreferenceScreen; 25 import android.text.TextUtils; 26 import android.view.LayoutInflater; 27 import android.view.View; 28 import android.view.ViewGroup; 29 import com.android.internal.logging.nano.MetricsProto; 30 import com.android.settings.R; 31 import com.android.settings.core.InstrumentedPreferenceFragment; 32 import com.android.settings.widget.RadioButtonPreference; 33 34 import java.util.List; 35 36 /** 37 * Fragment for choosing default network scorer. 38 */ 39 public class NetworkScorerPicker extends InstrumentedPreferenceFragment implements 40 RadioButtonPreference.OnClickListener { 41 42 private NetworkScoreManagerWrapper mNetworkScoreManager; 43 44 @Override 45 public int getMetricsCategory() { 46 return MetricsProto.MetricsEvent.SETTINGS_NETWORK_SCORER; 47 } 48 49 @Override 50 public void onCreatePreferences(Bundle savedInstanceState, String rootKey) { 51 super.onCreatePreferences(savedInstanceState, rootKey); 52 addPreferencesFromResource(R.xml.network_scorer_picker_prefs); 53 updateCandidates(); 54 } 55 56 @Override 57 public void onAttach(Context context) { 58 super.onAttach(context); 59 mNetworkScoreManager = createNetworkScorerManagerWrapper(context); 60 } 61 62 @Override 63 public View onCreateView(LayoutInflater inflater, ViewGroup container, 64 Bundle savedInstanceState) { 65 final View view = super.onCreateView(inflater, container, savedInstanceState); 66 // this is needed so the back button goes back to previous fragment 67 setHasOptionsMenu(true); 68 return view; 69 } 70 71 @VisibleForTesting 72 public void updateCandidates() { 73 final PreferenceScreen screen = getPreferenceScreen(); 74 screen.removeAll(); 75 76 final List<NetworkScorerAppData> scorers = mNetworkScoreManager.getAllValidScorers(); 77 final String defaultAppKey = getActiveScorerPackage(); 78 79 final RadioButtonPreference nonePref = new RadioButtonPreference(getPrefContext()); 80 nonePref.setTitle(R.string.network_scorer_picker_none_preference); 81 if (scorers.isEmpty()) { 82 nonePref.setChecked(true); 83 } else { 84 nonePref.setKey(null); 85 nonePref.setChecked(TextUtils.isEmpty(defaultAppKey)); 86 nonePref.setOnClickListener(this); 87 } 88 screen.addPreference(nonePref); 89 90 final int numScorers = scorers.size(); 91 for (int i = 0; i < numScorers; i++) { 92 final RadioButtonPreference pref = new RadioButtonPreference(getPrefContext()); 93 final NetworkScorerAppData appData = scorers.get(i); 94 final String appKey = appData.getRecommendationServicePackageName(); 95 pref.setTitle(appData.getRecommendationServiceLabel()); 96 pref.setKey(appKey); 97 pref.setChecked(TextUtils.equals(defaultAppKey, appKey)); 98 pref.setOnClickListener(this); 99 screen.addPreference(pref); 100 } 101 } 102 103 private String getActiveScorerPackage() { 104 return mNetworkScoreManager.getActiveScorerPackage(); 105 } 106 107 private boolean setActiveScorer(String key) { 108 if (!TextUtils.equals(key, getActiveScorerPackage())) { 109 return mNetworkScoreManager.setActiveScorer(key); 110 } 111 return false; 112 } 113 114 @Override 115 public void onRadioButtonClicked(RadioButtonPreference selected) { 116 final String selectedKey = selected.getKey(); 117 final boolean success = setActiveScorer(selectedKey); 118 if (success) { 119 updateCheckedState(selectedKey); 120 } 121 } 122 123 private void updateCheckedState(String selectedKey) { 124 final PreferenceScreen screen = getPreferenceScreen(); 125 final int count = screen.getPreferenceCount(); 126 for (int i = 0; i < count; i++) { 127 final Preference pref = screen.getPreference(i); 128 if (pref instanceof RadioButtonPreference) { 129 final RadioButtonPreference radioPref = (RadioButtonPreference) pref; 130 radioPref.setChecked(TextUtils.equals(pref.getKey(), selectedKey)); 131 } 132 } 133 } 134 135 @VisibleForTesting 136 NetworkScoreManagerWrapper createNetworkScorerManagerWrapper(Context context) { 137 return new NetworkScoreManagerWrapper(context.getSystemService(NetworkScoreManager.class)); 138 } 139 } 140