b/2026622 Fixed the problem with the UI keeps showing that BT is scanning even though it has stopped.

For some reason, the framework does not notify the settings app when the scan is done while the screen is off.

src/com/android/settings/bluetooth/BluetoothSettings.java

@@ -50,25 +50,25 @@ public class BluetoothSettings extends PreferenceActivity
     private static final String TAG = "BluetoothSettings";
 
     private static final int MENU_SCAN = Menu.FIRST;
-    
+
     private static final String KEY_BT_CHECKBOX = "bt_checkbox";
     private static final String KEY_BT_DISCOVERABLE = "bt_discoverable";
     private static final String KEY_BT_DEVICE_LIST = "bt_device_list";
     private static final String KEY_BT_NAME = "bt_name";
     private static final String KEY_BT_SCAN = "bt_scan";
-    
+
     private LocalBluetoothManager mLocalManager;
-    
+
     private BluetoothEnabler mEnabler;
     private BluetoothDiscoverableEnabler mDiscoverableEnabler;
-    
+
     private BluetoothNamePreference mNamePreference;
-    
+
     private ProgressCategory mDeviceList;
-    
+
     private WeakHashMap<LocalBluetoothDevice, BluetoothDevicePreference> mDevicePreferenceMap =
             new WeakHashMap<LocalBluetoothDevice, BluetoothDevicePreference>();
-    
+
     private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
         @Override
         public void onReceive(Context context, Intent intent) {
@@ -82,29 +82,29 @@ public class BluetoothSettings extends PreferenceActivity
         super.onCreate(savedInstanceState);
 
         mLocalManager = LocalBluetoothManager.getInstance(this);
-        if (mLocalManager == null) finish();        
+        if (mLocalManager == null) finish();
-        
+
         addPreferencesFromResource(R.xml.bluetooth_settings);
-        
+
         mEnabler = new BluetoothEnabler(
                 this,
                 (CheckBoxPreference) findPreference(KEY_BT_CHECKBOX));
-        
+
         mDiscoverableEnabler = new BluetoothDiscoverableEnabler(
                 this,
                 (CheckBoxPreference) findPreference(KEY_BT_DISCOVERABLE));
-    
+
         mNamePreference = (BluetoothNamePreference) findPreference(KEY_BT_NAME);
-        
+
         mDeviceList = (ProgressCategory) findPreference(KEY_BT_DEVICE_LIST);
-        
+
         registerForContextMenu(getListView());
     }
 
     @Override
     protected void onResume() {
         super.onResume();
-        
+
         // Repopulate (which isn't too bad since it's cached in the settings
         // bluetooth manager
         mDevicePreferenceMap.clear();
@@ -115,23 +115,24 @@ public class BluetoothSettings extends PreferenceActivity
         mDiscoverableEnabler.resume();
         mNamePreference.resume();
         mLocalManager.registerCallback(this);
-        
+
+        mDeviceList.setProgress(mLocalManager.getBluetoothManager().isDiscovering());
         mLocalManager.startScanning(false);
 
         registerReceiver(mReceiver,
                 new IntentFilter(BluetoothIntent.BLUETOOTH_STATE_CHANGED_ACTION));
-        
+
         mLocalManager.setForegroundActivity(this);
     }
-    
+
     @Override
     protected void onPause() {
         super.onPause();
 
         mLocalManager.setForegroundActivity(null);
-        
+
         unregisterReceiver(mReceiver);
-        
+
         mLocalManager.unregisterCallback(this);
         mNamePreference.pause();
         mDiscoverableEnabler.pause();
@@ -144,7 +145,7 @@ public class BluetoothSettings extends PreferenceActivity
             onDeviceAdded(device);
         }
     }
-    
+
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         menu.add(0, MENU_SCAN, 0, R.string.bluetooth_scan_for_devices)
@@ -162,11 +163,11 @@ public class BluetoothSettings extends PreferenceActivity
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         switch (item.getItemId()) {
-        
+
             case MENU_SCAN:
                 mLocalManager.startScanning(true);
                 return true;
-                
+
             default:
                 return false;
         }
@@ -180,22 +181,22 @@ public class BluetoothSettings extends PreferenceActivity
             mLocalManager.startScanning(true);
             return true;
         }
-        
+
         if (preference instanceof BluetoothDevicePreference) {
             BluetoothDevicePreference btPreference = (BluetoothDevicePreference) preference;
             btPreference.getDevice().onClicked();
             return true;
         }
-        
+
         return super.onPreferenceTreeClick(preferenceScreen, preference);
     }
-    
+
     @Override
     public void onCreateContextMenu(ContextMenu menu, View v,
             ContextMenuInfo menuInfo) {
         LocalBluetoothDevice device = getDeviceFromMenuInfo(menuInfo);
         if (device == null) return;
-        
+
         device.onCreateContextMenu(menu);
     }
 
@@ -203,7 +204,7 @@ public class BluetoothSettings extends PreferenceActivity
     public boolean onContextItemSelected(MenuItem item) {
         LocalBluetoothDevice device = getDeviceFromMenuInfo(item.getMenuInfo());
         if (device == null) return false;
-        
+
         device.onContextItemSelected(item);
         return true;
     }
@@ -212,7 +213,7 @@ public class BluetoothSettings extends PreferenceActivity
         if ((menuInfo == null) || !(menuInfo instanceof AdapterContextMenuInfo)) {
             return null;
         }
-        
+
         AdapterContextMenuInfo adapterMenuInfo = (AdapterContextMenuInfo) menuInfo;
         Preference pref = (Preference) getPreferenceScreen().getRootAdapter().getItem(
                 adapterMenuInfo.position);
@@ -222,14 +223,14 @@ public class BluetoothSettings extends PreferenceActivity
 
         return ((BluetoothDevicePreference) pref).getDevice();
     }
-    
+
     public void onDeviceAdded(LocalBluetoothDevice device) {
 
         if (mDevicePreferenceMap.get(device) != null) {
             throw new IllegalStateException("Got onDeviceAdded, but device already exists");
         }
-        
+
-        createDevicePreference(device);            
+        createDevicePreference(device);
     }
 
     private void createDevicePreference(LocalBluetoothDevice device) {
@@ -237,7 +238,7 @@ public class BluetoothSettings extends PreferenceActivity
         mDeviceList.addPreference(preference);
         mDevicePreferenceMap.put(device, preference);
     }
-    
+
     public void onDeviceDeleted(LocalBluetoothDevice device) {
         BluetoothDevicePreference preference = mDevicePreferenceMap.remove(device);
         if (preference != null) {
@@ -248,7 +249,7 @@ public class BluetoothSettings extends PreferenceActivity
     public void onScanningStateChanged(boolean started) {
         mDeviceList.setProgress(started);
     }
-    
+
     private void onBluetoothStateChanged(int bluetoothState) {
         // When bluetooth is enabled (and we are in the activity, which we are),
         // we should start a scan