Support configuring the protocol in APN settings.

Change-Id: I435061a631bdb2f58935af607abf8cd7c5d252ba

res/values/arrays.xml

@@ -464,6 +464,22 @@
         <item>3</item>
     </string-array>
 
+    <!-- Authentication Types used in APN editor -->
+    <string-array name="apn_protocol_entries">
+        <item>IPv4</item>
+        <item>IPv6</item>
+        <item>IPv4/IPv6</item>
+    </string-array>
+
+    <string-array translatable="false" name="apn_protocol_values">
+        <!-- Do not translate. -->
+        <item>IP</item>
+        <!-- Do not translate. -->
+        <item>IPV6</item>
+        <!-- Do not translate. -->
+        <item>IPV4V6</item>
+    </string-array>
+
     <!-- Apps on SD instalaltion location options in ApplicationSettings -->
     <string-array name="app_install_location_entries">
         <item>Internal device storage</item>

res/values/strings.xml

@@ -1677,6 +1677,8 @@
     <string name="apn_auth_type_pap_chap">PAP or CHAP</string>
     <!-- Edit access point labels: The type of APN -->
     <string name="apn_type">APN type</string>
+    <!-- Edit access point labels: The protocol of the APN, e.g., "IPv4", "IPv6", or "IPv4/IPv6". -->
+    <string name="apn_protocol">APN protocol</string>
     <!-- Edit access point screen menu option to delete this APN -->
     <string name="menu_delete">Delete APN</string>
     <!-- APNs screen menu option to create a brand spanking new APN -->

res/xml/apn_editor.xml

@@ -114,4 +114,11 @@
         android:singleLine="true"
         android:inputType="textNoSuggestions"
         />
+    <ListPreference
+        android:title="@string/apn_protocol"
+        android:dialogTitle="@string/apn_protocol"
+        android:key="apn_protocol"
+        android:entries="@array/apn_protocol_entries"
+        android:entryValues="@array/apn_protocol_values"
+        />
 </PreferenceScreen>   

src/com/android/settings/ApnEditor.java

@@ -48,6 +48,7 @@ public class ApnEditor extends PreferenceActivity
 
     private final static String SAVED_POS = "pos";
     private final static String KEY_AUTH_TYPE = "auth_type";
+    private final static String KEY_PROTOCOL = "apn_protocol";
 
     private static final int MENU_DELETE = Menu.FIRST;
     private static final int MENU_SAVE = Menu.FIRST + 1;
@@ -69,6 +70,7 @@ public class ApnEditor extends PreferenceActivity
     private EditTextPreference mMmsPort;
     private ListPreference mAuthType;
     private EditTextPreference mApnType;
+    private ListPreference mProtocol;
 
     private String mCurMnc;
     private String mCurMcc;
@@ -99,6 +101,7 @@ public class ApnEditor extends PreferenceActivity
             Telephony.Carriers.MMSPORT, // 13
             Telephony.Carriers.AUTH_TYPE, // 14
             Telephony.Carriers.TYPE, // 15
+            Telephony.Carriers.PROTOCOL, // 16
     };
 
     private static final int ID_INDEX = 0;
@@ -116,6 +119,7 @@ public class ApnEditor extends PreferenceActivity
     private static final int MMSPORT_INDEX = 13;
     private static final int AUTH_TYPE_INDEX = 14;
     private static final int TYPE_INDEX = 15;
+    private static final int PROTOCOL_INDEX = 16;
 
 
     @Override
@@ -139,9 +143,12 @@ public class ApnEditor extends PreferenceActivity
         mMnc = (EditTextPreference) findPreference("apn_mnc");
         mApnType = (EditTextPreference) findPreference("apn_type");
 
-        mAuthType = (ListPreference) findPreference("auth_type");
+        mAuthType = (ListPreference) findPreference(KEY_AUTH_TYPE);
         mAuthType.setOnPreferenceChangeListener(this);
 
+        mProtocol = (ListPreference) findPreference(KEY_PROTOCOL);
+        mProtocol.setOnPreferenceChangeListener(this);
+
         mRes = getResources();
 
         final Intent intent = getIntent();
@@ -238,6 +245,7 @@ public class ApnEditor extends PreferenceActivity
                 mAuthType.setValue(null);
             }
 
+            mProtocol.setValue(mCursor.getString(PROTOCOL_INDEX));
         }
 
         mName.setSummary(checkNull(mName.getText()));
@@ -264,6 +272,28 @@ public class ApnEditor extends PreferenceActivity
         } else {
             mAuthType.setSummary(sNotSet);
         }
+
+        mProtocol.setSummary(
+                checkNull(protocolDescription(mProtocol.getValue())));
+    }
+
+    /**
+     * Returns the UI choice (e.g., "IPv4/IPv6") corresponding to the given
+     * raw value of the protocol preference (e.g., "IPV4V6"). If unknown,
+     * return null.
+     */
+    private String protocolDescription(String raw) {
+        int protocolIndex = mProtocol.findIndexOfValue(raw);
+        if (protocolIndex == -1) {
+            return null;
+        } else {
+            String[] values = mRes.getStringArray(R.array.apn_protocol_entries);
+            try {
+                return values[protocolIndex];
+            } catch (ArrayIndexOutOfBoundsException e) {
+                return null;
+            }
+        }
     }
 
     public boolean onPreferenceChange(Preference preference, Object newValue) {
@@ -278,6 +308,16 @@ public class ApnEditor extends PreferenceActivity
             } catch (NumberFormatException e) {
                 return false;
             }
+            return true;
+        }
+
+        if (KEY_PROTOCOL.equals(key)) {
+            String protocol = protocolDescription((String) newValue);
+            if (protocol == null) {
+                return false;
+            }
+            mProtocol.setSummary(protocol);
+            mProtocol.setValue((String) newValue);
         }
         return true;
     }
@@ -389,6 +429,8 @@ public class ApnEditor extends PreferenceActivity
             values.put(Telephony.Carriers.AUTH_TYPE, Integer.parseInt(authVal));
         }
 
+        values.put(Telephony.Carriers.PROTOCOL, checkNotSet(mProtocol.getValue()));
+
         values.put(Telephony.Carriers.TYPE, checkNotSet(mApnType.getText()));
 
         values.put(Telephony.Carriers.MCC, mcc);