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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"); you may not use this file
      5  * except in compliance with the License. You may obtain a copy of the License at
      6  *
      7  *      http://www.apache.org/licenses/LICENSE-2.0
      8  *
      9  * Unless required by applicable law or agreed to in writing, software distributed under the
     10  * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     11  * KIND, either express or implied. See the License for the specific language governing
     12  * permissions and limitations under the License.
     13  */
     14 
     15 package com.android.internal.util;
     16 
     17 import android.content.Context;
     18 import android.content.Intent;
     19 import android.net.Uri;
     20 import android.os.Build;
     21 import android.os.UserHandle;
     22 import android.provider.Settings;
     23 
     24 /**
     25  * A class that manages emergency affordances and enables immediate calling to emergency services
     26  */
     27 public class EmergencyAffordanceManager {
     28 
     29     public static final boolean ENABLED = true;
     30 
     31     /**
     32      * Global setting override with the number to call with the emergency affordance.
     33      * @hide
     34      */
     35     private static final String EMERGENCY_CALL_NUMBER_SETTING = "emergency_affordance_number";
     36 
     37     /**
     38      * Global setting, whether the emergency affordance should be shown regardless of device state.
     39      * The value is a boolean (1 or 0).
     40      * @hide
     41      */
     42     private static final String FORCE_EMERGENCY_AFFORDANCE_SETTING = "force_emergency_affordance";
     43 
     44     private final Context mContext;
     45 
     46     public EmergencyAffordanceManager(Context context) {
     47         mContext = context;
     48     }
     49 
     50     /**
     51      * perform an emergency call.
     52      */
     53     public final void performEmergencyCall() {
     54         performEmergencyCall(mContext);
     55     }
     56 
     57     private static Uri getPhoneUri(Context context) {
     58         String number = context.getResources().getString(
     59                 com.android.internal.R.string.config_emergency_call_number);
     60         if (Build.IS_DEBUGGABLE) {
     61             String override = Settings.Global.getString(
     62                     context.getContentResolver(), EMERGENCY_CALL_NUMBER_SETTING);
     63             if (override != null) {
     64                 number = override;
     65             }
     66         }
     67         return Uri.fromParts("tel", number, null);
     68     }
     69 
     70     private static void performEmergencyCall(Context context) {
     71         Intent intent = new Intent(Intent.ACTION_CALL_EMERGENCY);
     72         intent.setData(getPhoneUri(context));
     73         intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
     74         context.startActivityAsUser(intent, UserHandle.CURRENT);
     75     }
     76 
     77     /**
     78      * @return whether emergency affordance should be active.
     79      */
     80     public boolean needsEmergencyAffordance() {
     81         if (!ENABLED) {
     82             return false;
     83         }
     84         if (forceShowing()) {
     85             return true;
     86         }
     87         return isEmergencyAffordanceNeeded();
     88     }
     89 
     90     private boolean isEmergencyAffordanceNeeded() {
     91         return Settings.Global.getInt(mContext.getContentResolver(),
     92                 Settings.Global.EMERGENCY_AFFORDANCE_NEEDED, 0) != 0;
     93     }
     94 
     95 
     96     private boolean forceShowing() {
     97         return Settings.Global.getInt(mContext.getContentResolver(),
     98                 FORCE_EMERGENCY_AFFORDANCE_SETTING, 0) != 0;
     99     }
    100 }
    101