Allow carriers to force disable ETWS/CMAS test messages.

This feature can be enabled in carrier config XML. When enabled, the user will not see
ETWS/CMAS enable/disable option in emergency broadcast preference menu.

bug: 22396039
Change-Id: I67b09e283a85f2af682fa7f2d1cd81d7d7db5cf2

4 files changed, 64 insertions, 11 deletions

diff --git a/src/com/android/cellbroadcastreceiver/CellBroadcastAlertService.java b/src/com/android/cellbroadcastreceiver/CellBroadcastAlertService.java
index 072b0782..f646abdf 100644
--- a/src/com/android/cellbroadcastreceiver/CellBroadcastAlertService.java
+++ b/src/com/android/cellbroadcastreceiver/CellBroadcastAlertService.java
@@ -24,12 +24,10 @@ import android.app.Service;
 import android.app.ActivityManagerNative;
 import android.content.Context;
 import android.content.Intent;
-import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.os.IBinder;
 import android.os.RemoteException;
 import android.os.UserHandle;
-import android.preference.PreferenceManager;
 import android.provider.Telephony;
 import android.telephony.CellBroadcastMessage;
 import android.telephony.SmsCbCmasInfo;
@@ -254,8 +252,14 @@ public class CellBroadcastAlertService extends Service {
      * @return true if the user has enabled this message type; false otherwise
      */
     private boolean isMessageEnabledByUser(CellBroadcastMessage message) {
+
+        // Check if ETWS/CMAS test message is forced to disabled on the device.
+        boolean forceDisableEtwsCmasTest =
+                CellBroadcastSettings.isEtwsCmasTestMessageForcedDisabled(this, message.getSubId());
+
         if (message.isEtwsTestMessage()) {
-            return SubscriptionManager.getBooleanSubscriptionProperty(
+            return !forceDisableEtwsCmasTest &&
+                    SubscriptionManager.getBooleanSubscriptionProperty(
                     message.getSubId(), SubscriptionManager.CB_ETWS_TEST_ALERT, false, this);
         }
 
@@ -276,9 +280,9 @@ public class CellBroadcastAlertService extends Service {
                 case SmsCbCmasInfo.CMAS_CLASS_REQUIRED_MONTHLY_TEST:
                 case SmsCbCmasInfo.CMAS_CLASS_CMAS_EXERCISE:
                 case SmsCbCmasInfo.CMAS_CLASS_OPERATOR_DEFINED_USE:
-                    return SubscriptionManager.getBooleanSubscriptionProperty(
+                    return !forceDisableEtwsCmasTest &&
+                            SubscriptionManager.getBooleanSubscriptionProperty(
                             message.getSubId(), SubscriptionManager.CB_CMAS_TEST_ALERT, false, this);
-
                 default:
                     return true;    // presidential-level CMAS alerts are always enabled
             }
diff --git a/src/com/android/cellbroadcastreceiver/CellBroadcastConfigService.java b/src/com/android/cellbroadcastreceiver/CellBroadcastConfigService.java
index 6c5a7d32..09b56ef8 100644
--- a/src/com/android/cellbroadcastreceiver/CellBroadcastConfigService.java
+++ b/src/com/android/cellbroadcastreceiver/CellBroadcastConfigService.java
@@ -176,7 +176,13 @@ public class CellBroadcastConfigService extends IntentService {
                                 SubscriptionManager.CB_CHANNEL_50_ALERT, true, this);
 
                 // Note:  ETWS is for 3GPP only
-                boolean enableEtwsTestAlerts = SubscriptionManager.getBooleanSubscriptionProperty(
+
+                // Check if ETWS/CMAS test message is forced disabled on the device.
+                boolean forceDisableEtwsCmasTest =
+                        CellBroadcastSettings.isEtwsCmasTestMessageForcedDisabled(this, subId);
+
+                boolean enableEtwsTestAlerts = !forceDisableEtwsCmasTest &&
+                        SubscriptionManager.getBooleanSubscriptionProperty(
                         subId, SubscriptionManager.CB_ETWS_TEST_ALERT, false, this);
 
                 boolean enableCmasExtremeAlerts = SubscriptionManager
@@ -189,7 +195,8 @@ public class CellBroadcastConfigService extends IntentService {
                 boolean enableCmasAmberAlerts = SubscriptionManager.getBooleanSubscriptionProperty(
                         subId, SubscriptionManager.CB_AMBER_ALERT, true, this);
 
-                boolean enableCmasTestAlerts = SubscriptionManager.getBooleanSubscriptionProperty(
+                boolean enableCmasTestAlerts = !forceDisableEtwsCmasTest &&
+                        SubscriptionManager.getBooleanSubscriptionProperty(
                         subId, SubscriptionManager.CB_CMAS_TEST_ALERT, false, this);
 
                 // set up broadcast ID ranges to be used for each category
diff --git a/src/com/android/cellbroadcastreceiver/CellBroadcastReceiver.java b/src/com/android/cellbroadcastreceiver/CellBroadcastReceiver.java
index 42cf053b..f255f638 100644
--- a/src/com/android/cellbroadcastreceiver/CellBroadcastReceiver.java
+++ b/src/com/android/cellbroadcastreceiver/CellBroadcastReceiver.java
@@ -46,7 +46,7 @@ import java.util.List;
 
 public class CellBroadcastReceiver extends BroadcastReceiver {
     private static final String TAG = "CellBroadcastReceiver";
-    static final boolean DBG = true;    // STOPSHIP: change to false before ship
+    static final boolean DBG = false;    // STOPSHIP: change to false before ship
     private static int mServiceState = -1;
     private static final String GET_LATEST_CB_AREA_INFO_ACTION =
             "android.cellbroadcastreceiver.GET_LATEST_CB_AREA_INFO";
diff --git a/src/com/android/cellbroadcastreceiver/CellBroadcastSettings.java b/src/com/android/cellbroadcastreceiver/CellBroadcastSettings.java
index 10cfa09d..02e1adcd 100644
--- a/src/com/android/cellbroadcastreceiver/CellBroadcastSettings.java
+++ b/src/com/android/cellbroadcastreceiver/CellBroadcastSettings.java
@@ -18,6 +18,7 @@ package com.android.cellbroadcastreceiver;
 
 import android.content.Context;
 import android.os.Bundle;
+import android.os.PersistableBundle;
 import android.os.UserManager;
 import android.preference.CheckBoxPreference;
 import android.preference.ListPreference;
@@ -26,6 +27,7 @@ import android.preference.PreferenceActivity;
 import android.preference.PreferenceCategory;
 import android.preference.PreferenceScreen;
 import android.provider.Settings;
+import android.telephony.CarrierConfigManager;
 import android.telephony.TelephonyManager;
 import android.telephony.SubscriptionManager;
 import android.telephony.SubscriptionInfo;
@@ -320,6 +322,9 @@ public class CellBroadcastSettings extends PreferenceActivity {
                         }
                     });
 
+            boolean forceDisableEtwsCmasTest =
+                    isEtwsCmasTestMessageForcedDisabled(this, mSir.getSubscriptionId());
+
             // Show alert settings and ETWS categories for ETWS builds and developer mode.
             if (enableDevSettings || showEtwsSettings) {
                 // enable/disable all alerts
@@ -354,12 +359,25 @@ public class CellBroadcastSettings extends PreferenceActivity {
                                 return true;
                             }
                         });
+                if (forceDisableEtwsCmasTest) {
+                    // Remove ETWS test preference.
+                    prefScreen.removePreference(findPreference(KEY_CATEGORY_ETWS_SETTINGS));
+
+                    PreferenceCategory devSettingCategory =
+                            (PreferenceCategory) findPreference(KEY_CATEGORY_DEV_SETTINGS);
+
+                    // Remove CMAS test preference.
+                    if (devSettingCategory != null) {
+                        devSettingCategory.removePreference(
+                                findPreference(KEY_ENABLE_CMAS_TEST_ALERTS));
+                    }
+                }
             } else {
                 // Remove general emergency alert preference items (not shown for CMAS builds).
                 mAlertCategory.removePreference(findPreference(KEY_ENABLE_EMERGENCY_ALERTS));
                 mAlertCategory.removePreference(findPreference(KEY_ALERT_SOUND_DURATION));
                 mAlertCategory.removePreference(findPreference(KEY_ENABLE_ALERT_SPEECH));
-                // Remove ETWS preference category.
+                // Remove ETWS test preference category.
                 prefScreen.removePreference(findPreference(KEY_CATEGORY_ETWS_SETTINGS));
             }
 
@@ -456,7 +474,8 @@ public class CellBroadcastSettings extends PreferenceActivity {
             }
 
             if (mEtwsTestCheckBox != null) {
-                if (SubscriptionManager.getBooleanSubscriptionProperty(mSir.getSubscriptionId(),
+                if (!forceDisableEtwsCmasTest &&
+                        SubscriptionManager.getBooleanSubscriptionProperty(mSir.getSubscriptionId(),
                         SubscriptionManager.CB_ETWS_TEST_ALERT, false, this)) {
                     mEtwsTestCheckBox.setChecked(true);
                 } else {
@@ -501,7 +520,8 @@ public class CellBroadcastSettings extends PreferenceActivity {
             }
 
             if (mCmasCheckBox != null) {
-                if (SubscriptionManager.getBooleanSubscriptionProperty(mSir.getSubscriptionId(),
+                if (!forceDisableEtwsCmasTest &&
+                        SubscriptionManager.getBooleanSubscriptionProperty(mSir.getSubscriptionId(),
                         SubscriptionManager.CB_CMAS_TEST_ALERT, false, this)) {
                     mCmasCheckBox.setChecked(true);
                 } else {
@@ -510,7 +530,29 @@ public class CellBroadcastSettings extends PreferenceActivity {
                 mCmasCheckBox.setOnPreferenceChangeListener(startConfigServiceListener);
             }
         }
+    }
+
+    // Check if ETWS/CMAS test message is forced disabled on the device.
+    public static boolean isEtwsCmasTestMessageForcedDisabled(Context context, int subId) {
+
+        if (context == null) {
+            return false;
+        }
+
+        CarrierConfigManager configManager =
+                (CarrierConfigManager) context.getSystemService(Context.CARRIER_CONFIG_SERVICE);
+
+        if (configManager != null) {
+            PersistableBundle carrierConfig =
+                    configManager.getConfigForSubId(subId);
+
+            if (carrierConfig != null) {
+                return carrierConfig.getBoolean(
+                        CarrierConfigManager.KEY_CARRIER_FORCE_DISABLE_ETWS_CMAS_TEST_BOOL);
+            }
+        }
 
+        return false;
     }
 
     private OnTabChangeListener mTabListener = new OnTabChangeListener() {