Provide last known cell id for emergency call
Provide last known cell id to connection service
for emergency calls.
Bug: 198533763
Test: unit test
Change-Id: I219ebab40f58dfa9bf3c8c294fdcca86aa5fd3a7
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 6b4a19c..5050ea3 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -242,6 +242,10 @@
<!-- Needed to listen to changes in projection state. -->
<uses-permission android:name="android.permission.READ_PROJECTION_STATE"/>
+ <permission android:name="com.android.phone.permission.ACCESS_LAST_KNOWN_CELL_ID"
+ android:label="Access last known cell identity."
+ android:protectionLevel="signature"/>
+
<application android:name="PhoneApp"
android:persistent="true"
android:label="@string/phoneAppLabel"
diff --git a/src/com/android/phone/PhoneInterfaceManager.java b/src/com/android/phone/PhoneInterfaceManager.java
index a0b2277..f4859d5 100755
--- a/src/com/android/phone/PhoneInterfaceManager.java
+++ b/src/com/android/phone/PhoneInterfaceManager.java
@@ -10957,4 +10957,54 @@
Binder.restoreCallingIdentity(token);
}
}
+
+ /**
+ * @return {@CellIdentity} last known cell identity {@CellIdentity}.
+ *
+ * Require {@link android.Manifest.permission#ACCESS_FINE_LOCATION} and
+ * com.android.phone.permission.ACCESS_LAST_KNOWN_CELL_ID, otherwise throws
+ * SecurityException.
+ * If there is current registered network this value will be same as the registered cell
+ * identity. If the device goes out of service the previous cell identity is cached and
+ * will be returned. If the cache age of the Cell identity is more than 24 hours
+ * it will be cleared and null will be returned.
+ *
+ */
+ @Override
+ public @Nullable CellIdentity getLastKnownCellIdentity(int subId, String callingPackage,
+ String callingFeatureId) {
+ mAppOps.checkPackage(Binder.getCallingUid(), callingPackage);
+ LocationAccessPolicy.LocationPermissionResult fineLocationResult =
+ LocationAccessPolicy.checkLocationPermission(mApp,
+ new LocationAccessPolicy.LocationPermissionQuery.Builder()
+ .setCallingPackage(callingPackage)
+ .setCallingFeatureId(callingFeatureId)
+ .setCallingPid(Binder.getCallingPid())
+ .setCallingUid(Binder.getCallingUid())
+ .setMethod("getLastKnownCellIdentity")
+ .setLogAsInfo(true)
+ .setMinSdkVersionForFine(Build.VERSION_CODES.Q)
+ .setMinSdkVersionForCoarse(Build.VERSION_CODES.Q)
+ .setMinSdkVersionForEnforcement(Build.VERSION_CODES.Q)
+ .build());
+
+ boolean hasFinePermission =
+ fineLocationResult == LocationAccessPolicy.LocationPermissionResult.ALLOWED;
+ if (!hasFinePermission
+ || !TelephonyPermissions.checkLastKnownCellIdAccessPermission(mApp)) {
+ throw new SecurityException("getLastKnownCellIdentity need ACCESS_FINE_LOCATION "
+ + "and BIND_CONNECTION_SERVICE permission.");
+ }
+
+ final long identity = Binder.clearCallingIdentity();
+ try {
+ Phone phone = getPhone(subId);
+ if (phone == null) return null;
+ ServiceStateTracker sst = phone.getServiceStateTracker();
+ if (sst == null) return null;
+ return sst.getLastKnownCellIdentity();
+ } finally {
+ Binder.restoreCallingIdentity(identity);
+ }
+ }
}