WIP: MOre ui stuff for "Start Swap" screen.

F-Droid/res/layout/swap_blank.xml

@@ -57,6 +57,7 @@
             android:src="@drawable/ic_bluetooth_white" />
 
         <TextView
+            android:id="@+id/bluetooth_visible"
             android:paddingStart="15dp"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -105,15 +106,17 @@
                 android:textSize="18sp" />
 
             <TextView
+                android:id="@+id/wifi_network"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 tools:text="wifi network name"
-                android:textColor="@color/swap_light_text"
+                android:textColor="@color/swap_bright_blue"
                 android:textSize="16sp" />
 
         </LinearLayout>
 
         <TextView
+            android:id="@+id/device_id_wifi"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:text="@string/swap_wifi_device_name"
@@ -138,6 +141,7 @@
         android:paddingTop="20dp">
 
         <TextView
+            android:id="@+id/text_people_nearby"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:text="@string/swap_people_nearby"
@@ -145,21 +149,13 @@
             android:layout_weight="1.00"/>
 
         <ProgressBar
+            android:id="@+id/searching_people_nearby"
             android:layout_width="24dp"
             android:layout_height="24dp"
             android:indeterminate="true" />
 
     </LinearLayout>
 
-    <TextView
-        android:id="@+id/no_people_nearby"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:padding="20dp"
-        android:textStyle="italic"
-        android:textColor="@color/swap_light_text"
-        android:text="@string/swap_no_peers_nearby"/>
-
     <ListView
         android:id="@+id/list_people_nearby"
         android:layout_width="match_parent"
@@ -181,11 +177,22 @@
 
         <Button
             android:layout_width="wrap_content"
-            android:layout_height="wrap_content" />
+            android:layout_height="wrap_content"
+            android:drawableStart="@drawable/ic_fdroid_grey"
+            android:text="@string/swap_send_fdroid"
+            android:drawablePadding="10dp"
+            android:padding="25dp"
+            android:background="@android:color/transparent" />
 
         <Button
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_width="match_parent"/>
+            android:drawableStart="@drawable/ic_qr_grey"
+            android:text="@string/swap_scan_qr_code"
+            android:drawablePadding="10dp"
+            android:padding="25dp"
+            android:background="@android:color/transparent" />
+
+    </LinearLayout>
 
 </org.fdroid.fdroid.views.swap.StartSwapView>

F-Droid/res/values/strings.xml

@@ -324,6 +324,18 @@
 	<string name="swap_choose_apps">Choose Apps</string>
 	<string name="swap_scan_qr">Scan QR Code</string>
 	<string name="swap_people_nearby">People Nearby</string>
+	<string name="swap_scanning_for_peers">Searching for nearby people…</string>
+	<string name="swap_nearby">Nearby Swap</string>
+	<string name="swap_intro">Connect and trade apps with people near you.</string>
+	<string name="swap_visible_bluetooth">Visible via Bluetooth</string>
+	<string name="swap_not_visible_bluetooth">Not visible via Bluetooth</string>
+	<string name="swap_visible_wifi">Visible via WiFi</string>
+	<string name="swap_not_visible_wifi">Not visible via WiFi</string>
+	<string name="swap_wifi_device_name">Device Name</string>
+	<string name="swap_cant_find_peers">Can\'t find who you\'re looking for?</string>
+	<string name="swap_send_fdroid">SEND F-DROID</string>
+	<string name="swap_scan_qr_code">SCAN QR CODE</string>
+	<string name="swap_no_peers_nearby">Could not find people nearby to swap with.</string>
 
     <!-- WiFi AP status for Swap flow -->
     <string name="wifi_ap_public">Public</string>
@@ -332,13 +344,4 @@
     <string name="wifi_warning_public">May work</string>
     <string name="wifi_warning_private">Promising</string>
     <string name="wifi_warning_personal">Best bet</string>
-	<string name="swap_nearby">Nearby Swap</string>
-	<string name="swap_intro">Connect and trade apps with people near you.</string>
-	<string name="swap_visible_bluetooth">Visible via Bluetooth</string>
-	<string name="swap_not_visible_wifi">Not visible via WiFi</string>
-	<string name="swap_wifi_device_name">Device Name</string>
-	<string name="swap_people_nearby">People Nearby</string>
-	<string name="swap_cant_find_peers">Can\'t find who you\'re looking for?</string>
-	<string name="swap_send_fdroid">SEND F-DROID</string>
-	<string name="swap_no_peers_nearby">Could not find people nearby to swap with.</string>
 </resources>

F-Droid/src/org/fdroid/fdroid/localrepo/SwapManager.java

@@ -10,8 +10,11 @@ import android.os.IBinder;
 import android.support.annotation.IntDef;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
+import android.text.TextUtils;
 import android.util.Log;
 
+import org.fdroid.fdroid.FDroid;
+import org.fdroid.fdroid.FDroidApp;
 import org.fdroid.fdroid.localrepo.peers.Peer;
 import org.fdroid.fdroid.localrepo.peers.PeerFinder;
 
@@ -184,7 +187,9 @@ public class SwapManager {
      */
     private static Set<String> deserializePackages(String packages) {
         Set<String> set = new HashSet<>();
-        Collections.addAll(set, packages.split(","));
+        if (!TextUtils.isEmpty(packages)) {
+            Collections.addAll(set, packages.split(","));
+        }
         return set;
     }
 
@@ -288,7 +293,6 @@ public class SwapManager {
     }
 
     public void ensureBluetoothDiscoverable() {
-
         if (bluetooth == null) {
             return;
         }
@@ -302,9 +306,34 @@ public class SwapManager {
         if (bluetooth.isEnabled()) {
             Intent discoverableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
             discoverableIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 0);
+
+            // TODO: Hmm, don't like the idea of a background service being able to do this :(
+            discoverableIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+
             context.startActivity(discoverableIntent);
         }
+    }
 
+    public void makeBluetoothNonDiscoverable() {
+        if (bluetooth == null) {
+            return;
+        }
+
+        if (isBluetoothDiscoverable()) {
+            // TODO: How to disable this?
+        }
+    }
+
+    private boolean isWifiConnected() {
+        return !TextUtils.isEmpty(FDroidApp.ssid);
+    }
+
+    public boolean isBonjourDiscoverable() {
+        return isWifiConnected() && service != null && service.isEnabled();
+    }
+
+    public boolean isScanningForPeers() {
+        return service != null && service.isScanningForPeers();
     }
 
 }

F-Droid/src/org/fdroid/fdroid/localrepo/SwapService.java

@@ -65,6 +65,10 @@ public class SwapService extends Service {
     @Nullable
     private Timer timer;
 
+    public boolean isScanningForPeers() {
+        return bonjourFinder.isScanning() || bluetoothFinder.isScanning();
+    }
+
     public class Binder extends android.os.Binder {
         public SwapService getService() {
             return SwapService.this;
@@ -140,10 +144,6 @@ public class SwapService extends Service {
         bluetoothFinder.cancel();
     }
 
-    public void onPeerFound(Peer peer) {
-        SwapManager.load(this).onPeerFound(peer);
-    }
-
     private boolean enabled = false;
 
     /**

F-Droid/src/org/fdroid/fdroid/localrepo/peers/BluetoothFinder.java

@@ -29,6 +29,15 @@ public class BluetoothFinder extends PeerFinder<BluetoothPeer> {
             return;
         }
 
+        if (isScanning) {
+            // TODO: Can we reset the discovering timeout, so that it doesn't, e.g. time out
+            // in 3 seconds because we had already almost completed the previous scan?
+            Log.d(TAG, "Requested bluetooth scan when already scanning, will ignore request.");
+            return;
+        }
+
+        isScanning = true;
+
         final BroadcastReceiver deviceFoundReceiver = new BroadcastReceiver() {
             @Override
             public void onReceive(Context context, Intent intent) {
@@ -43,6 +52,7 @@ public class BluetoothFinder extends PeerFinder<BluetoothPeer> {
             @Override
             public void onReceive(Context context, Intent intent) {
                 Log.d(TAG, "Scan complete: " + intent.getAction());
+                isScanning = false;
             }
         };
 
@@ -61,6 +71,8 @@ public class BluetoothFinder extends PeerFinder<BluetoothPeer> {
             Log.d(TAG, "Stopping bluetooth discovery.");
             adapter.cancelDiscovery();
         }
+
+        isScanning = false;
     }
 
     private void onDeviceFound(BluetoothDevice device) {

F-Droid/src/org/fdroid/fdroid/localrepo/peers/BonjourFinder.java

@@ -38,6 +38,12 @@ public class BonjourFinder extends PeerFinder<BonjourPeer> implements ServiceLis
             mMulticastLock.setReferenceCounted(false);
         }
 
+        if (isScanning) {
+            Log.d(TAG, "Requested Bonjour scan, but already scanning, so will ignore request.");
+            return;
+        }
+
+        isScanning = true;
         mMulticastLock.acquire();
         new AsyncTask<Void, Void, Void>() {
 
@@ -116,6 +122,7 @@ public class BonjourFinder extends PeerFinder<BonjourPeer> implements ServiceLis
         mJmdns.removeServiceListener(HTTP_SERVICE_TYPE, this);
         mJmdns.removeServiceListener(HTTPS_SERVICE_TYPE, this);
         mJmdns = null;
+        isScanning = false;
 
     }
 

F-Droid/src/org/fdroid/fdroid/localrepo/peers/PeerFinder.java

@@ -19,9 +19,15 @@ public abstract class PeerFinder<T extends Peer> {
 
     private Listener<T> listener;
 
+    protected boolean isScanning = false;
+
     public abstract void scan();
     public abstract void cancel();
 
+    public boolean isScanning() {
+        return isScanning;
+    }
+
     protected void foundPeer(T peer) {
         Log.i(TAG, "Found peer " + peer.getName());
         if (listener != null) {

F-Droid/src/org/fdroid/fdroid/views/swap/StartSwapView.java

@@ -1,17 +1,28 @@
 package org.fdroid.fdroid.views.swap;
 
 import android.annotation.TargetApi;
+import android.bluetooth.BluetoothAdapter;
 import android.content.Context;
 import android.os.Build;
 import android.support.annotation.ColorRes;
 import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.CompoundButton;
 import android.widget.LinearLayout;
+import android.widget.ListView;
+import android.widget.ProgressBar;
+import android.widget.Switch;
+import android.widget.TextView;
 
+import org.fdroid.fdroid.FDroidApp;
 import org.fdroid.fdroid.R;
 import org.fdroid.fdroid.localrepo.SwapManager;
 import org.fdroid.fdroid.localrepo.peers.Peer;
@@ -77,19 +88,65 @@ public class StartSwapView extends LinearLayout implements SwapWorkflowActivity.
     private final BluetoothAdapter bluetooth = BluetoothAdapter.getDefaultAdapter();
 
     private TextView viewBluetoothId;
-    private View noPeopleNearby;
+    private TextView viewWifiId;
-    private ListView peopleNearby;
+    private TextView viewWifiNetwork;
+    private TextView peopleNearbyText;
+    private ListView peopleNearbyList;
+    private ProgressBar peopleNearbyProgress;
 
     @Override
     protected void onFinishInflate() {
         super.onFinishInflate();
 
-        noPeopleNearby = findViewById(R.id.no_people_nearby);
+        uiInitPeers();
-        peopleNearby = (ListView)findViewById(R.id.list_people_nearby);
+        uiInitBluetooth();
-        peopleNearby.setVisibility(View.GONE);
+        uiInitWifi();
+    }
 
+    /**
+     * Setup the list of nearby peers with an adapter, and hide or show it and the associated
+     * message for when no peers are nearby depending on what is happening.
+     */
+    private void uiInitPeers() {
+
+        peopleNearbyText = (TextView)findViewById(R.id.text_people_nearby);
+        peopleNearbyList = (ListView)findViewById(R.id.list_people_nearby);
+        peopleNearbyProgress = (ProgressBar)findViewById(R.id.searching_people_nearby);
+
+        final PeopleNearbyAdapter adapter = new PeopleNearbyAdapter(getContext());
+        peopleNearbyList.setAdapter(adapter);
+        uiUpdatePeersInfo();
+
+        SwapManager.load(getActivity()).setPeerListener(new PeerFinder.Listener<Peer>() {
+            @Override
+            public void onPeerFound(Peer peer) {
+                adapter.notifyDataSetChanged();
+                uiUpdatePeersInfo();
+            }
+        });
+
+    }
+
+    private void uiUpdatePeersInfo() {
+        if (getManager().isScanningForPeers()) {
+            peopleNearbyText.setText(getContext().getString(R.string.swap_scanning_for_peers));
+            peopleNearbyProgress.setVisibility(View.VISIBLE);
+        } else {
+            peopleNearbyProgress.setVisibility(View.GONE);
+            if (peopleNearbyList.getAdapter().getCount() > 0) {
+                peopleNearbyText.setText(getContext().getString(R.string.swap_people_nearby));
+            } else {
+                peopleNearbyText.setText(getContext().getString(R.string.swap_no_peers_nearby));
+            }
+        }
+
+    }
+
+    private void uiInitBluetooth() {
         if (bluetooth != null) {
 
+            final TextView textBluetoothVisible = (TextView)findViewById(R.id.bluetooth_visible);
+
             viewBluetoothId = (TextView)findViewById(R.id.device_id_bluetooth);
             viewBluetoothId.setText(bluetooth.getName());
 
@@ -100,39 +157,61 @@ public class StartSwapView extends LinearLayout implements SwapWorkflowActivity.
                 public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                     if (isChecked) {
                         getManager().ensureBluetoothDiscoverable();
+                        getManager().scanForPeers();
+                        textBluetoothVisible.setText(getContext().getString(R.string.swap_visible_bluetooth));
+                        uiUpdatePeersInfo();
+                        // TODO: When they deny the request for enabling bluetooth, we need to disable this switch...
                     } else {
-                        // disableBluetooth();
+                        getManager().cancelScanningForPeers();
+                        getManager().makeBluetoothNonDiscoverable();
+                        textBluetoothVisible.setText(getContext().getString(R.string.swap_not_visible_bluetooth));
+                        uiUpdatePeersInfo();
                     }
                 }
             });
         } else {
             findViewById(R.id.bluetooth_info).setVisibility(View.GONE);
         }
+    }
 
-        ((Switch)findViewById(R.id.switch_wifi)).setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+    private void uiInitWifi() {
+
+        final TextView textBluetoothVisible = (TextView)findViewById(R.id.bluetooth_visible);
+
+        viewWifiId = (TextView)findViewById(R.id.device_id_wifi);
+        viewWifiNetwork = (TextView)findViewById(R.id.wifi_network);
+
+        Switch wifiSwitch = (Switch)findViewById(R.id.switch_wifi);
+        wifiSwitch.setChecked(getManager().isBonjourDiscoverable());
+        wifiSwitch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
             @Override
             public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                 if (isChecked) {
-                    enableWifi();
+                    textBluetoothVisible.setText(getContext().getString(R.string.swap_visible_wifi));
+                    uiUpdatePeersInfo();
                 } else {
-                    disableWifi();
+                    textBluetoothVisible.setText(getContext().getString(R.string.swap_not_visible_wifi));
+                    uiUpdatePeersInfo();
                 }
             }
         });
 
-        final PeopleNearbyAdapter adapter = new PeopleNearbyAdapter(getContext());
+        uiUpdateWifi();
-
+    }
-        peopleNearbyList = (ListView)findViewById(R.id.people_nearby);
-        peopleNearbyList.setAdapter(adapter);
-
-        SwapManager.load(getActivity()).setPeerListener(new PeerFinder.Listener<Peer>() {
-            @Override
-            public void onPeerFound(Peer peer) {
-                adapter.notifyDataSetChanged();
-            }
-        });
 
+    private void uiUpdateWifi() {
+        viewWifiId.setText(FDroidApp.ipAddressString);
 
+        if (TextUtils.isEmpty(FDroidApp.bssid) && !TextUtils.isEmpty(FDroidApp.ipAddressString)) {
+            // empty bssid with an ipAddress means hotspot mode
+            viewWifiNetwork.setText(getContext().getString(R.string.swap_active_hotspot));
+        } else if (TextUtils.isEmpty(FDroidApp.ssid)) {
+            // not connected to or setup with any wifi network
+            viewWifiNetwork.setText(getContext().getString(R.string.swap_no_wifi_network));
+        } else {
+            // connected to a regular wifi network
+            viewWifiNetwork.setText(FDroidApp.ssid);
+        }
     }
 
     @Override
@@ -165,16 +244,4 @@ public class StartSwapView extends LinearLayout implements SwapWorkflowActivity.
         return getResources().getString(R.string.swap_nearby);
     }
 
-
-    // ========================================================================
-    //                            Wifi stuff
-    // ========================================================================
-
-    private void enableWifi() {
-
-    }
-
-    private void disableWifi() {
-
-    }
 }