Fix NPE in WirelessSettings.onCreate() for SDK and non-BT devices.

Fix NPE when entering Settings app in the SDK (and for devices without
Bluetooth). Also remove the "Bluetooth settings" item in addition to
the Bluetooth toggle item from Wireless settings when BT is missing.

Bug: 4149307
Change-Id: Iecc5960a193cf88664d3217b4d7bdbc2276dabc0

3 files changed, 9 insertions, 9 deletions

diff --git a/src/com/android/settings/WirelessSettings.java b/src/com/android/settings/WirelessSettings.java
index 4b92749..2844f3b 100644
--- a/src/com/android/settings/WirelessSettings.java
+++ b/src/com/android/settings/WirelessSettings.java
@@ -19,8 +19,6 @@ package com.android.settings;
 import com.android.internal.telephony.TelephonyIntents;
 import com.android.internal.telephony.TelephonyProperties;
 import com.android.settings.bluetooth.BluetoothEnabler;
-import com.android.settings.bluetooth.LocalBluetoothAdapter;
-import com.android.settings.bluetooth.LocalBluetoothManager;
 import com.android.settings.wifi.WifiEnabler;
 import com.android.settings.nfc.NfcEnabler;
 
@@ -105,8 +103,7 @@ public class WirelessSettings extends SettingsPreferenceFragment {
         mAirplaneModeEnabler = new AirplaneModeEnabler(activity, airplane);
         mAirplaneModePreference = (CheckBoxPreference) findPreference(KEY_TOGGLE_AIRPLANE);
         mWifiEnabler = new WifiEnabler(activity, wifi);
-        mBtEnabler = new BluetoothEnabler(activity,
-                LocalBluetoothManager.getInstance(activity).getBluetoothAdapter(), bt);
+        mBtEnabler = new BluetoothEnabler(activity, bt);
         mNfcEnabler = new NfcEnabler(activity, nfc);
 
         String toggleable = Settings.System.getString(activity.getContentResolver(),
@@ -128,6 +125,7 @@ public class WirelessSettings extends SettingsPreferenceFragment {
         // Remove Bluetooth Settings if Bluetooth service is not available.
         if (ServiceManager.getService(BluetoothAdapter.BLUETOOTH_SERVICE) == null) {
             getPreferenceScreen().removePreference(bt);
+            getPreferenceScreen().removePreference(findPreference(KEY_BT_SETTINGS));
         }
 
         // Remove NFC if its not available
diff --git a/src/com/android/settings/bluetooth/BluetoothEnabler.java b/src/com/android/settings/bluetooth/BluetoothEnabler.java
index 9aeb1b9..79f23bb 100644
--- a/src/com/android/settings/bluetooth/BluetoothEnabler.java
+++ b/src/com/android/settings/bluetooth/BluetoothEnabler.java
@@ -50,17 +50,19 @@ public final class BluetoothEnabler implements Preference.OnPreferenceChangeList
         }
     };
 
-    public BluetoothEnabler(Context context, LocalBluetoothAdapter adapter,
-            CheckBoxPreference checkBox) {
+    public BluetoothEnabler(Context context, CheckBoxPreference checkBox) {
         mContext = context;
         mCheckBox = checkBox;
         mOriginalSummary = checkBox.getSummary();
         checkBox.setPersistent(false);
 
-        mLocalAdapter = adapter;
-        if (adapter == null) {
+        LocalBluetoothManager manager = LocalBluetoothManager.getInstance(context);
+        if (manager == null) {
             // Bluetooth is not supported
+            mLocalAdapter = null;
             checkBox.setEnabled(false);
+        } else {
+            mLocalAdapter = manager.getBluetoothAdapter();
         }
         mIntentFilter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
     }
diff --git a/src/com/android/settings/bluetooth/BluetoothSettings.java b/src/com/android/settings/bluetooth/BluetoothSettings.java
index c6ba9af..5e4e130 100644
--- a/src/com/android/settings/bluetooth/BluetoothSettings.java
+++ b/src/com/android/settings/bluetooth/BluetoothSettings.java
@@ -58,7 +58,7 @@ public final class BluetoothSettings extends DeviceListPreferenceFragment {
     void addPreferencesForActivity() {
         addPreferencesFromResource(R.xml.bluetooth_settings);
 
-        mEnabler = new BluetoothEnabler(getActivity(), mLocalAdapter,
+        mEnabler = new BluetoothEnabler(getActivity(),
                 (CheckBoxPreference) findPreference(KEY_BT_CHECKBOX));
 
         mDiscoverableEnabler = new BluetoothDiscoverableEnabler(getActivity(),