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.applications.assist; 18 19 import android.content.Context; 20 import android.net.Uri; 21 import android.os.UserHandle; 22 import android.provider.Settings; 23 import android.support.v7.preference.Preference; 24 import android.support.v7.preference.PreferenceScreen; 25 import android.support.v7.preference.TwoStatePreference; 26 27 import com.android.internal.app.AssistUtils; 28 import com.android.settings.core.PreferenceControllerMixin; 29 import com.android.settingslib.core.AbstractPreferenceController; 30 import com.android.settingslib.core.lifecycle.Lifecycle; 31 import com.android.settingslib.core.lifecycle.LifecycleObserver; 32 import com.android.settingslib.core.lifecycle.events.OnPause; 33 import com.android.settingslib.core.lifecycle.events.OnResume; 34 35 import java.util.Arrays; 36 import java.util.List; 37 38 public class AssistContextPreferenceController extends AbstractPreferenceController 39 implements PreferenceControllerMixin, Preference.OnPreferenceChangeListener, 40 LifecycleObserver, OnResume, OnPause { 41 42 private static final String KEY_CONTEXT = "context"; 43 44 private final AssistUtils mAssistUtils; 45 private final SettingObserver mSettingObserver; 46 47 private Preference mPreference; 48 private PreferenceScreen mScreen; 49 AssistContextPreferenceController(Context context, Lifecycle lifecycle)50 public AssistContextPreferenceController(Context context, Lifecycle lifecycle) { 51 super(context); 52 mAssistUtils = new AssistUtils(context); 53 mSettingObserver = new SettingObserver(); 54 55 if (lifecycle != null) { 56 lifecycle.addObserver(this); 57 } 58 } 59 60 @Override isAvailable()61 public boolean isAvailable() { 62 return mAssistUtils.getAssistComponentForUser(UserHandle.myUserId()) != null; 63 } 64 65 @Override getPreferenceKey()66 public String getPreferenceKey() { 67 return KEY_CONTEXT; 68 } 69 70 @Override displayPreference(PreferenceScreen screen)71 public void displayPreference(PreferenceScreen screen) { 72 mScreen = screen; 73 mPreference = screen.findPreference(getPreferenceKey()); 74 super.displayPreference(screen); 75 } 76 77 @Override onResume()78 public void onResume() { 79 mSettingObserver.register(mContext.getContentResolver(), true); 80 updatePreference(); 81 } 82 83 @Override updateState(Preference preference)84 public void updateState(Preference preference) { 85 updatePreference(); 86 } 87 88 @Override onPause()89 public void onPause() { 90 mSettingObserver.register(mContext.getContentResolver(), false); 91 } 92 93 updatePreference()94 private void updatePreference() { 95 if (mPreference == null || !(mPreference instanceof TwoStatePreference)) { 96 return; 97 } 98 if (isAvailable()) { 99 if (mScreen.findPreference(getPreferenceKey()) == null) { 100 // add it if it's not on scree 101 mScreen.addPreference(mPreference); 102 } 103 } else { 104 mScreen.removePreference(mPreference); 105 } 106 107 ((TwoStatePreference) mPreference).setChecked(isChecked(mContext)); 108 } 109 110 @Override onPreferenceChange(Preference preference, Object newValue)111 public boolean onPreferenceChange(Preference preference, Object newValue) { 112 Settings.Secure.putInt(mContext.getContentResolver(), 113 Settings.Secure.ASSIST_STRUCTURE_ENABLED, 114 (boolean) newValue ? 1 : 0); 115 return true; 116 } 117 isChecked(Context context)118 static boolean isChecked(Context context) { 119 return Settings.Secure.getInt(context.getContentResolver(), 120 Settings.Secure.ASSIST_STRUCTURE_ENABLED, 1) != 0; 121 } 122 123 class SettingObserver extends AssistSettingObserver { 124 125 private final Uri URI = 126 Settings.Secure.getUriFor(Settings.Secure.ASSIST_STRUCTURE_ENABLED); 127 128 @Override getSettingUris()129 protected List<Uri> getSettingUris() { 130 return Arrays.asList(URI); 131 } 132 133 @Override onSettingChange()134 public void onSettingChange() { 135 updatePreference(); 136 } 137 } 138 } 139