From c4764d24837cf297440f0ee97fe8adb943c56fe0 Mon Sep 17 00:00:00 2001
From: Robert Greenwalt <robdroid@android.com>
Date: Fri, 12 Feb 2010 14:21:37 -0800
Subject: [PATCH] Update Settings UI regarding tethering.

If tethering is disabled (build var or a gservices property) for the device,
don't show any of the tethering options.  If Usb Tethering is disabled (config.xml) don't show
Usb Options.  If Wifi Tethering is disabled (config.xml) don't show Wifi Options.
---
 AndroidManifest.xml                           |  3 +-
 res/xml/wireless_settings.xml                 |  1 +
 src/com/android/settings/TetherSettings.java  | 60 ++++++++++++++++---
 .../android/settings/WirelessSettings.java    | 12 +++-
 4 files changed, 64 insertions(+), 12 deletions(-)

diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 67f0cde727a..ad4596e6949 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -171,8 +171,7 @@
         </activity>
 
         <activity android:name=".TetherSettings"
-                android:configChanges="orientation|keyboardHidden"
-                android:launchMode="singleTask">
+                android:clearTaskOnLaunch="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.DEFAULT" />
diff --git a/res/xml/wireless_settings.xml b/res/xml/wireless_settings.xml
index 9977505434f..5ee758a5227 100644
--- a/res/xml/wireless_settings.xml
+++ b/res/xml/wireless_settings.xml
@@ -57,6 +57,7 @@
     </PreferenceScreen>
 
     <PreferenceScreen
+        android:key="tether_settings"
         android:title="@string/tether_settings_title"
         android:summary="@string/tether_settings_summary">
         <intent
diff --git a/src/com/android/settings/TetherSettings.java b/src/com/android/settings/TetherSettings.java
index 0a63de30799..1e9c4e292ea 100644
--- a/src/com/android/settings/TetherSettings.java
+++ b/src/com/android/settings/TetherSettings.java
@@ -30,6 +30,7 @@ import android.preference.CheckBoxPreference;
 import android.provider.Settings;
 import android.util.Log;
 
+import java.util.ArrayList;
 /*
  * Displays preferences for Tethering.
  */
@@ -43,6 +44,12 @@ public class TetherSettings extends PreferenceActivity {
 
     private BroadcastReceiver mTetherChangeReceiver;
 
+    private String[] mUsbRegexs;
+    private ArrayList mUsbIfaces;
+
+    private String[] mWifiRegexs;
+    private ArrayList mWifiIfaces;
+
     @Override
     protected void onCreate(Bundle icicle) {
         super.onCreate(icicle);
@@ -51,12 +58,27 @@ public class TetherSettings extends PreferenceActivity {
 
         mEnableTetherNotice = (CheckBoxPreference) findPreference(ENABLE_TETHER_NOTICE);
         mUsbTether = (PreferenceScreen) findPreference(USB_TETHER_SETTINGS);
+
+        ConnectivityManager cm =
+                (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
+        mUsbRegexs = cm.getTetherableUsbRegexs();
+        if (mUsbRegexs.length == 0) {
+            getPreferenceScreen().removePreference(mUsbTether);
+            getPreferenceScreen().removePreference(mEnableTetherNotice);
+        }
+        mWifiRegexs = cm.getTetherableWifiRegexs();
     }
 
+
     private class TetherChangeReceiver extends BroadcastReceiver {
         public void onReceive(Context content, Intent intent) {
-            updateState(intent.getIntExtra(ConnectivityManager.EXTRA_AVAILABLE_TETHER_COUNT,0)>0,
-                    intent.getIntExtra(ConnectivityManager.EXTRA_ACTIVE_TETHER_COUNT,0)>0);
+            // TODO - this should understand the interface types
+            ArrayList<String> available = intent.getStringArrayListExtra(
+                    ConnectivityManager.EXTRA_AVAILABLE_TETHER);
+            ArrayList<String> active = intent.getStringArrayListExtra(
+                    ConnectivityManager.EXTRA_ACTIVE_TETHER);
+
+            updateState(available, active);
         }
     }
 
@@ -68,11 +90,9 @@ public class TetherSettings extends PreferenceActivity {
 
         IntentFilter filter = new IntentFilter(ConnectivityManager.ACTION_TETHER_STATE_CHANGED);
         mTetherChangeReceiver = new TetherChangeReceiver();
-        registerReceiver(mTetherChangeReceiver, filter);
+        Intent intent = registerReceiver(mTetherChangeReceiver, filter);
 
-        ConnectivityManager cm =
-                (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
-        updateState(cm.getTetherableIfaces().length>0, cm.getTetheredIfaces().length>0);
+        if (intent != null) mTetherChangeReceiver.onReceive(this, intent);
     }
 
     @Override
@@ -82,11 +102,33 @@ public class TetherSettings extends PreferenceActivity {
         mTetherChangeReceiver = null;
     }
 
-    private void updateState(boolean isAvailable, boolean isTethered) {
-        if (isTethered) {
+    private void updateState(ArrayList<String> available, ArrayList<String> tethered) {
+        boolean usbTethered = false;
+        boolean usbAvailable = false;
+        boolean wifiTethered = false;
+        boolean wifiAvailable = false;
+
+        for (String s : available) {
+            for (String regex : mUsbRegexs) {
+                if (s.matches(regex)) usbAvailable = true;
+            }
+            for (String regex : mWifiRegexs) {
+                if (s.matches(regex)) wifiAvailable = true;
+            }
+        }
+        for (String s : tethered) {
+            for (String regex : mUsbRegexs) {
+                if (s.matches(regex)) usbTethered = true;
+            }
+            for (String regex : mWifiRegexs) {
+                if (s.matches(regex)) wifiTethered = true;
+            }
+        }
+
+        if (usbTethered) {
             mUsbTether.setSummary(R.string.usb_tethering_active_subtext);
             mUsbTether.setEnabled(true);
-        } else if (isAvailable) {
+        } else if (usbAvailable) {
             mUsbTether.setSummary(R.string.usb_tethering_available_subtext);
             mUsbTether.setEnabled(true);
         } else {
diff --git a/src/com/android/settings/WirelessSettings.java b/src/com/android/settings/WirelessSettings.java
index bf75e27af7b..6db2001f6ee 100644
--- a/src/com/android/settings/WirelessSettings.java
+++ b/src/com/android/settings/WirelessSettings.java
@@ -19,6 +19,7 @@ package com.android.settings;
 import android.bluetooth.BluetoothAdapter;
 import android.content.Context;
 import android.content.Intent;
+import android.net.ConnectivityManager;
 import android.net.wifi.WifiManager;
 import android.os.Bundle;
 import android.os.ServiceManager;
@@ -28,6 +29,7 @@ import android.preference.Preference;
 import android.preference.PreferenceActivity;
 import android.preference.PreferenceScreen;
 import android.provider.Settings;
+import android.util.Log;
 
 import com.android.internal.telephony.TelephonyIntents;
 import com.android.internal.telephony.TelephonyProperties;
@@ -42,6 +44,7 @@ public class WirelessSettings extends PreferenceActivity {
     private static final String KEY_WIFI_SETTINGS = "wifi_settings";
     private static final String KEY_BT_SETTINGS = "bt_settings";
     private static final String KEY_VPN_SETTINGS = "vpn_settings";
+    private static final String KEY_TETHER_SETTINGS = "tether_settings";
     public static final String EXIT_ECM_RESULT = "exit_ecm_result";
     public static final int REQUEST_CODE_EXIT_ECM = 1;
 
@@ -114,8 +117,15 @@ public class WirelessSettings extends PreferenceActivity {
         if (ServiceManager.getService(BluetoothAdapter.BLUETOOTH_SERVICE) == null) {
             findPreference(KEY_BT_SETTINGS).setEnabled(false);
         }
+
+        // Disable Tethering if it's not allowed
+        ConnectivityManager cm =
+                (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
+        if (!cm.isTetheringSupported()) {
+            getPreferenceScreen().removePreference(findPreference(KEY_TETHER_SETTINGS));
+        }
     }
-    
+
     @Override
     protected void onResume() {
         super.onResume();