1 /* 2 * Copyright (C) 2020 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.emergency; 18 19 import static com.android.settingslib.emergencynumber.EmergencyNumberUtils.EMERGENCY_NUMBER_OVERRIDE_AUTHORITY; 20 21 import android.content.Context; 22 import android.database.ContentObserver; 23 import android.os.Handler; 24 import android.os.Looper; 25 import android.telephony.PhoneNumberUtils; 26 import android.text.Spannable; 27 28 import androidx.annotation.VisibleForTesting; 29 import androidx.preference.Preference; 30 import androidx.preference.PreferenceScreen; 31 32 import com.android.settings.R; 33 import com.android.settings.core.BasePreferenceController; 34 import com.android.settingslib.core.lifecycle.LifecycleObserver; 35 import com.android.settingslib.core.lifecycle.events.OnStart; 36 import com.android.settingslib.core.lifecycle.events.OnStop; 37 import com.android.settingslib.emergencynumber.EmergencyNumberUtils; 38 39 /** 40 * Preference controller for emergency gesture number override. 41 */ 42 public class EmergencyGestureNumberOverridePreferenceController extends BasePreferenceController 43 implements LifecycleObserver, OnStart, OnStop { 44 45 @VisibleForTesting 46 EmergencyNumberUtils mEmergencyNumberUtils; 47 private final Handler mHandler; 48 private final ContentObserver mSettingsObserver; 49 private Preference mPreference; 50 EmergencyGestureNumberOverridePreferenceController(Context context, String preferenceKey)51 public EmergencyGestureNumberOverridePreferenceController(Context context, 52 String preferenceKey) { 53 super(context, preferenceKey); 54 mEmergencyNumberUtils = new EmergencyNumberUtils(context); 55 mHandler = new Handler(Looper.getMainLooper()); 56 mSettingsObserver = new EmergencyGestureNumberOverrideSettingsObserver(mHandler); 57 } 58 59 @Override getAvailabilityStatus()60 public int getAvailabilityStatus() { 61 return mContext.getResources() 62 .getBoolean(R.bool.config_show_emergency_gesture_settings) ? AVAILABLE 63 : UNSUPPORTED_ON_DEVICE; 64 } 65 66 @Override displayPreference(PreferenceScreen screen)67 public void displayPreference(PreferenceScreen screen) { 68 super.displayPreference(screen); 69 70 mPreference = screen.findPreference(getPreferenceKey()); 71 } 72 73 @Override getSummary()74 public CharSequence getSummary() { 75 String number = mEmergencyNumberUtils.getPoliceNumber(); 76 String summary = mContext.getString(R.string.emergency_gesture_call_for_help_summary, 77 number); 78 int numberStartIndex = summary.indexOf(number); 79 if (numberStartIndex < 0) { 80 return summary; 81 } 82 Spannable summarySpan = Spannable.Factory.getInstance().newSpannable(summary); 83 PhoneNumberUtils.addTtsSpan(summarySpan, numberStartIndex, 84 numberStartIndex + number.length()); 85 return summarySpan; 86 } 87 88 @Override onStart()89 public void onStart() { 90 mContext.getContentResolver().registerContentObserver(EMERGENCY_NUMBER_OVERRIDE_AUTHORITY, 91 false, mSettingsObserver); 92 } 93 94 @Override onStop()95 public void onStop() { 96 mContext.getContentResolver().unregisterContentObserver(mSettingsObserver); 97 } 98 99 private class EmergencyGestureNumberOverrideSettingsObserver extends ContentObserver { EmergencyGestureNumberOverrideSettingsObserver(Handler h)100 EmergencyGestureNumberOverrideSettingsObserver(Handler h) { 101 super(h); 102 } 103 104 @Override onChange(boolean selfChange)105 public void onChange(boolean selfChange) { 106 if (mPreference != null) { 107 updateState(mPreference); 108 } 109 } 110 } 111 } 112