Simplify and fix management of the server lists

The existing code in refreshLists() was somewhat hard to understand, and it
actually crashed (if uncommented-out). Now it simply empties the maps and view
lists and then rebuilds them.

The visible end result, at least for me, is that I no longer get duplicate
servers in the list...

Change-Id: I1543292e219e666e7dcbc68473f40a11e2eb3381

android/sdremote/src/org/libreoffice/impressremote/SelectorActivity.java

@@ -9,8 +9,8 @@
 package org.libreoffice.impressremote;
 
 import java.text.MessageFormat;
-import java.util.Arrays;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map.Entry;
 
 import org.libreoffice.impressremote.communication.CommunicationService;
@@ -267,27 +267,18 @@ public class SelectorActivity extends SherlockActivity {
     private void refreshLists() {
         if (mCommunicationService != null) {
 
-            Server[] aServers = mCommunicationService.getServers();
+            List<Server> aServers = mCommunicationService.getServers();
+
+            Log.i(Globals.TAG, "SelectorActivity.refreshLists: got " + aServers.size() + " servers");
+
+            // Simply replace the lists... first clear the old lists,
+            // Then add those currently found.
+
+            mNetworkServers.clear();
+            mBluetoothServers.clear();
+            mNetworkList.removeAllViews();
+            mBluetoothList.removeAllViews();
 
-/* TODO: this crashes currently - some concurrent modification on mBluetoothServers
-            // Bluetooth -- Remove old
-            for (Entry<Server, View> aEntry : mBluetoothServers.entrySet()) {
-                if (!Arrays.asList(aServers).contains(aEntry.getKey())) {
-                    mBluetoothServers.remove(aEntry.getKey());
-                    mBluetoothList.removeView((View) aEntry.getValue()
-                                    .getParent());
-                }
-            }
-*/
-            // Network -- Remove old
-            for (Entry<Server, View> aEntry : mNetworkServers.entrySet()) {
-                if (!Arrays.asList(aServers).contains(aEntry.getKey())) {
-                    mNetworkServers.remove(aEntry.getKey());
-                    mNetworkList.removeView((View) aEntry.getValue()
-                                    .getParent());
-                }
-            }
-            // Add all new
             for (Server aServer : aServers) {
                 boolean aIsBluetooth = (aServer.getProtocol() == Protocol.BLUETOOTH);
                 HashMap<Server, View> aMap = aIsBluetooth ? mBluetoothServers
@@ -295,22 +286,19 @@ public class SelectorActivity extends SherlockActivity {
                 LinearLayout aLayout = aIsBluetooth ? mBluetoothList
                                 : mNetworkList;
 
-                if (!aMap.containsKey(aServer)) {
+                View aView = getLayoutInflater()
-                    View aView = getLayoutInflater()
+                                .inflate(R.layout.activity_selector_sublayout_server,
-                                    .inflate(R.layout.activity_selector_sublayout_server,
+                                                null);
-                                                    null);
 
-                    TextView aText = (TextView) aView
+                TextView aText = (TextView) aView
-                                    .findViewById(R.id.selector_sub_label);
+                                .findViewById(R.id.selector_sub_label);
-                    aText.setOnClickListener(mClickListener);
+                aText.setOnClickListener(mClickListener);
-                    aText.setText(aServer.getName());
+                aText.setText(aServer.getName());
-                    aLayout.addView(aView);
+                aLayout.addView(aView);
-                    aMap.put(aServer, aText);
+                aMap.put(aServer, aText);
-
-                    //                    registerForContextMenu(aView);
-                    registerForContextMenu(aText);
-                }
 
+                //                    registerForContextMenu(aView);
+                registerForContextMenu(aText);
             }
         }
 

android/sdremote/src/org/libreoffice/impressremote/communication/BluetoothFinder.java

@@ -34,10 +34,10 @@ public class BluetoothFinder {
     public BluetoothFinder(Context aContext) {
         mContext = aContext;
         mAdapter = BluetoothAdapter.getDefaultAdapter();
-
     }
 
     public void startFinding() {
+        Log.i(Globals.TAG, "BluetoothFinder.startFinding(): mAdapter=" + mAdapter);
         if (mAdapter == null) {
             return; // No bluetooth adapter found (emulator, special devices)
         }
@@ -49,6 +49,7 @@ public class BluetoothFinder {
     }
 
     public void stopFinding() {
+        Log.i(Globals.TAG, "BluetoothFinder.stopFinding(): mAdapter=" + mAdapter);
         if (mAdapter == null) {
             return; // No bluetooth adapter found (emulator, special devices)
         }
@@ -57,6 +58,7 @@ public class BluetoothFinder {
             mContext.unregisterReceiver(mReceiver);
         } catch (IllegalArgumentException e) {
             // The receiver wasn't registered
+            Log.i(Globals.TAG, "BluetoothFinder.stopFinding: " + e);
         }
     }
 
@@ -70,6 +72,7 @@ public class BluetoothFinder {
 
         @Override
         public void onReceive(Context context, Intent aIntent) {
+            Log.i(Globals.TAG, "BluetoothFinder: BroadcastReceiver.onReceive: aIntent=" + aIntent);
             if (aIntent.getAction().equals(BluetoothDevice.ACTION_FOUND)) {
                 BluetoothDevice aDevice = (BluetoothDevice) aIntent.getExtras()
                                 .get(BluetoothDevice.EXTRA_DEVICE);

android/sdremote/src/org/libreoffice/impressremote/communication/CommunicationService.java

@@ -11,9 +11,11 @@ package org.libreoffice.impressremote.communication;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 
+import org.libreoffice.impressremote.Globals;
 import org.libreoffice.impressremote.communication.Server.Protocol;
 
 import android.app.Service;
@@ -23,6 +25,7 @@ import android.content.SharedPreferences;
 import android.content.SharedPreferences.Editor;
 import android.os.Binder;
 import android.os.IBinder;
+import android.util.Log;
 import android.preference.PreferenceManager;
 import android.support.v4.content.LocalBroadcastManager;
 
@@ -126,6 +129,7 @@ public class CommunicationService extends Service implements Runnable {
     private boolean mBluetoothPreviouslyEnabled;
 
     public void startSearching() {
+        Log.i(Globals.TAG, "CommunicationService.startSearching()");
         SharedPreferences aPref = PreferenceManager.getDefaultSharedPreferences(this);
         boolean bEnableWifi = aPref.getBoolean("option_enablewifi", false);
         if (bEnableWifi)
@@ -140,12 +144,12 @@ public class CommunicationService extends Service implements Runnable {
     }
 
     public void stopSearching() {
+        Log.i(Globals.TAG, "CommunicationService.stopSearching()");
         mNetworkFinder.stopFinding();
         mBluetoothFinder.stopFinding();
         BluetoothAdapter aAdapter = BluetoothAdapter.getDefaultAdapter();
         if (aAdapter != null) {
             if (!mBluetoothPreviouslyEnabled) {
-
                 aAdapter.disable();
             }
         }
@@ -253,12 +257,12 @@ public class CommunicationService extends Service implements Runnable {
         return mTransmitter;
     }
 
-    public Server[] getServers() {
+    public List<Server> getServers() {
         ArrayList<Server> aServers = new ArrayList<Server>();
         aServers.addAll(mNetworkFinder.getServerList());
         aServers.addAll(mBluetoothFinder.getServerList());
         aServers.addAll(mManualServers.values());
-        return aServers.toArray(new Server[aServers.size()]);
+        return aServers;
     }
 
     public SlideShow getSlideShow() {