Update invitation UI when Bluetooth or WiFi status changes.

Fixes issue #3611925.

briar-android/res/values/strings.xml

@@ -31,7 +31,7 @@
 	<string name="bluetooth_not_available">Bluetooth is NOT AVAILABLE</string>
 	<string name="bluetooth_disabled">Bluetooth is OFF</string>
 	<string name="bluetooth_not_discoverable">Bluetooth is NOT DISCOVERABLE</string>
-	<string name="bluetooth_enabled">Bluetooth is discoverable</string>
+	<string name="bluetooth_discoverable">Bluetooth is discoverable</string>
 	<string name="fact_to_face">For security reasons you must be face-to-face with someone to add them as a contact</string>
 	<string name="continue_button">Continue</string>
 	<string name="your_invitation_code">Your invitation code is</string>

briar-android/src/net/sf/briar/android/invitation/AddContactActivity.java

 package net.sf.briar.android.invitation;
 
+import static android.bluetooth.BluetoothAdapter.ACTION_SCAN_MODE_CHANGED;
+import static android.bluetooth.BluetoothAdapter.ACTION_STATE_CHANGED;
+import static android.bluetooth.BluetoothAdapter.EXTRA_STATE;
+import static android.bluetooth.BluetoothAdapter.STATE_ON;
+import static android.net.wifi.WifiManager.NETWORK_STATE_CHANGED_ACTION;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
 
@@ -25,7 +30,13 @@ import net.sf.briar.api.invitation.InvitationListener;
 import net.sf.briar.api.invitation.InvitationState;
 import net.sf.briar.api.invitation.InvitationTask;
 import net.sf.briar.api.invitation.InvitationTaskFactory;
+import android.bluetooth.BluetoothAdapter;
+import android.content.BroadcastReceiver;
+import android.content.Context;
 import android.content.Intent;
+import android.content.IntentFilter;
+import android.net.wifi.WifiInfo;
+import android.net.wifi.WifiManager;
 import android.os.Bundle;
 
 import com.google.inject.Inject;
@@ -48,7 +59,7 @@ implements InvitationListener {
 	private long taskHandle = -1;
 	private AuthorId localAuthorId = null;
 	private String networkName = null;
-	private boolean useBluetooth = false;
+	private boolean bluetoothEnabled = false;
 	private int localInvitationCode = -1, remoteInvitationCode = -1;
 	private int localConfirmationCode = -1, remoteConfirmationCode = -1;
 	private boolean connectionFailed = false;
@@ -70,8 +81,6 @@ implements InvitationListener {
 			// Restore the activity's state
 			byte[] b = state.getByteArray("net.sf.briar.LOCAL_AUTHOR_ID");
 			if(b != null) localAuthorId = new AuthorId(b);
-			networkName = state.getString("net.sf.briar.NETWORK_NAME");
-			useBluetooth = state.getBoolean("net.sf.briar.USE_BLUETOOTH");
 			taskHandle = state.getLong("net.sf.briar.TASK_HANDLE", -1);
 			task = referenceManager.getReference(taskHandle,
 					InvitationTask.class);
@@ -133,6 +142,25 @@ implements InvitationListener {
 			}
 		}
 
+		// Listen for Bluetooth and WiFi state changes
+		IntentFilter filter = new IntentFilter();
+		filter.addAction(ACTION_STATE_CHANGED);
+		filter.addAction(ACTION_SCAN_MODE_CHANGED);
+		filter.addAction(NETWORK_STATE_CHANGED_ACTION);
+		BluetoothWifiStateReceiver receiver = new BluetoothWifiStateReceiver();
+		registerReceiver(receiver, filter);
+
+		// Get the current Bluetooth and WiFi state
+		BluetoothAdapter bluetooth = BluetoothAdapter.getDefaultAdapter();
+		if(bluetooth != null) bluetoothEnabled = bluetooth.isEnabled();
+		view.bluetoothStateChanged();
+		WifiManager wifi = (WifiManager) getSystemService(WIFI_SERVICE);
+		if(wifi != null && wifi.isWifiEnabled()) {
+			WifiInfo info = wifi.getConnectionInfo();
+			if(info.getNetworkId() != -1) networkName = info.getSSID();
+		}
+		view.wifiStateChanged();
+
 		// Bind to the service so we can wait for it to start
 		bindService(new Intent(BriarService.class.getName()),
 				serviceConnection, 0);
@@ -150,8 +178,6 @@ implements InvitationListener {
 			state.putByteArray("net.sf.briar.LOCAL_AUTHOR_ID",
 					localAuthorId.getBytes());
 		}
-		state.putString("net.sf.briar.NETWORK_NAME", networkName);
-		state.putBoolean("net.sf.briar.USE_BLUETOOTH", useBluetooth);
 		state.putInt("net.sf.briar.LOCAL_CODE", localInvitationCode);
 		state.putInt("net.sf.briar.REMOTE_CODE", remoteInvitationCode);
 		state.putBoolean("net.sf.briar.FAILED", connectionFailed);
@@ -174,7 +200,7 @@ implements InvitationListener {
 	}
 
 	void reset(AddContactView view) {
-		// Don't reset localAuthorId, networkName or useBluetooth
+		// Don't reset localAuthorId, networkName or bluetoothEnabled
 		task = null;
 		taskHandle = -1;
 		localInvitationCode = -1;
@@ -230,20 +256,12 @@ implements InvitationListener {
 		return localAuthorId;
 	}
 
-	void setNetworkName(String networkName) {
-		this.networkName = networkName;
-	}
-
 	String getNetworkName() {
 		return networkName;
 	}
 
-	void setUseBluetooth(boolean useBluetooth) {
-		this.useBluetooth = useBluetooth;
-	}
-
-	boolean getUseBluetooth() {
-		return useBluetooth;
+	boolean isBluetoothEnabled() {
+		return bluetoothEnabled;
 	}
 
 	int getLocalInvitationCode() {
@@ -341,6 +359,30 @@ implements InvitationListener {
 		});
 	}
 
+	private class BluetoothWifiStateReceiver extends BroadcastReceiver {
+
+		public void onReceive(Context ctx, Intent intent) {
+			String action = intent.getAction();
+			if(action.equals(ACTION_STATE_CHANGED)) {
+				int state = intent.getIntExtra(EXTRA_STATE, 0);
+				bluetoothEnabled = state == STATE_ON;
+				view.bluetoothStateChanged();
+			} else if(action.equals(ACTION_SCAN_MODE_CHANGED)) {
+				view.bluetoothStateChanged();
+			} else if(action.equals(NETWORK_STATE_CHANGED_ACTION)) {
+				WifiManager wifi = (WifiManager) getSystemService(WIFI_SERVICE);
+				if(wifi == null || !wifi.isWifiEnabled()) {
+					networkName = null;
+				} else {
+					WifiInfo info = wifi.getConnectionInfo();
+					if(info.getNetworkId() == -1) networkName = null;
+					else networkName = info.getSSID();
+				}
+				view.wifiStateChanged();
+			}
+		}
+	}
+
 	/**
 	 * Cleans up the reference to the invitation task when the task completes.
 	 * This class is static to prevent memory leaks.

briar-android/src/net/sf/briar/android/invitation/AddContactView.java

@@ -22,4 +22,8 @@ abstract class AddContactView extends LinearLayout {
 	}
 
 	abstract void populate();
+
+	void wifiStateChanged() {}
+
+	void bluetoothStateChanged() {}
 }

briar-android/src/net/sf/briar/android/invitation/BluetoothStateListener.java

-package net.sf.briar.android.invitation;
-
-interface BluetoothStateListener {
-
-	void bluetoothStateChanged(boolean enabled);
-}

briar-android/src/net/sf/briar/android/invitation/BluetoothWidget.java

@@ -17,14 +17,11 @@ import android.widget.TextView;
 
 public class BluetoothWidget extends LinearLayout implements OnClickListener {
 
-	private BluetoothStateListener listener = null;
-
 	public BluetoothWidget(Context ctx) {
 		super(ctx);
 	}
 
-	void init(BluetoothStateListener listener) {
-		this.listener = listener;
+	void init() {
 		setOrientation(HORIZONTAL);
 		setGravity(CENTER);
 		populate();
@@ -39,7 +36,6 @@ public class BluetoothWidget extends LinearLayout implements OnClickListener {
 		status.setPadding(10, 10, 10, 10);
 		BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
 		if(adapter == null) {
-			listener.bluetoothStateChanged(false);
 			ImageView warning = new ImageView(ctx);
 			warning.setPadding(5, 5, 5, 5);
 			warning.setImageResource(R.drawable.alerts_and_states_warning);
@@ -47,19 +43,17 @@ public class BluetoothWidget extends LinearLayout implements OnClickListener {
 			status.setText(R.string.bluetooth_not_available);
 			addView(status);
 		} else if(adapter.getScanMode() == SCAN_MODE_CONNECTABLE_DISCOVERABLE) {
-			listener.bluetoothStateChanged(true);
 			ImageView ok = new ImageView(ctx);
 			ok.setPadding(5, 5, 5, 5);
 			ok.setImageResource(R.drawable.navigation_accept);
 			addView(ok);
-			status.setText(R.string.bluetooth_enabled);
+			status.setText(R.string.bluetooth_discoverable);
 			addView(status);
 			ImageButton settings = new ImageButton(ctx);
 			settings.setImageResource(R.drawable.action_settings);
 			settings.setOnClickListener(this);
 			addView(settings);
 		} else if(adapter.isEnabled()) {
-			listener.bluetoothStateChanged(true);
 			ImageView warning = new ImageView(ctx);
 			warning.setPadding(5, 5, 5, 5);
 			warning.setImageResource(R.drawable.alerts_and_states_warning);
@@ -71,7 +65,6 @@ public class BluetoothWidget extends LinearLayout implements OnClickListener {
 			settings.setOnClickListener(this);
 			addView(settings);
 		} else {
-			listener.bluetoothStateChanged(false);
 			ImageView warning = new ImageView(ctx);
 			warning.setPadding(5, 5, 5, 5);
 			warning.setImageResource(R.drawable.alerts_and_states_warning);

briar-android/src/net/sf/briar/android/invitation/ConnectionFailedView.java

@@ -12,8 +12,10 @@ import android.widget.LinearLayout;
 import android.widget.TextView;
 
 public class ConnectionFailedView extends AddContactView
-implements WifiStateListener, BluetoothStateListener, OnClickListener {
+implements OnClickListener {
 
+	private WifiWidget wifi = null;
+	private BluetoothWidget bluetooth = null;
 	private Button tryAgainButton = null;
 
 	ConnectionFailedView(Context ctx) {
@@ -44,12 +46,12 @@ implements WifiStateListener, BluetoothStateListener, OnClickListener {
 		checkNetwork.setText(R.string.check_same_network);
 		addView(checkNetwork);
 
-		WifiWidget wifi = new WifiWidget(ctx);
-		wifi.init(this);
+		wifi = new WifiWidget(ctx);
+		wifi.init();
 		addView(wifi);
 
-		BluetoothWidget bluetooth = new BluetoothWidget(ctx);
-		bluetooth.init(this);
+		bluetooth = new BluetoothWidget(ctx);
+		bluetooth.init();
 		addView(bluetooth);
 
 		tryAgainButton = new Button(ctx);
@@ -60,29 +62,21 @@ implements WifiStateListener, BluetoothStateListener, OnClickListener {
 		addView(tryAgainButton);
 	}
 
-	public void wifiStateChanged(final String networkName) {
-		container.runOnUiThread(new Runnable() {
-			public void run() {
-				container.setNetworkName(networkName);
-				enableOrDisableTryAgainButton();
-			}
-		});
+	void wifiStateChanged() {
+		if(wifi != null) wifi.populate();
+		enableOrDisableTryAgainButton();
 	}
 
-	public void bluetoothStateChanged(final boolean enabled) {
-		container.runOnUiThread(new Runnable() {
-			public void run() {
-				container.setUseBluetooth(enabled);
-				enableOrDisableTryAgainButton();
-			}
-		});
+	void bluetoothStateChanged() {
+		if(bluetooth != null) bluetooth.populate();
+		enableOrDisableTryAgainButton();
 	}
 
 	private void enableOrDisableTryAgainButton() {
 		if(tryAgainButton == null) return; // Activity not created yet
-		boolean useBluetooth = container.getUseBluetooth();
+		boolean bluetoothEnabled = container.isBluetoothEnabled();
 		String networkName = container.getNetworkName();
-		tryAgainButton.setEnabled(useBluetooth || networkName != null);
+		tryAgainButton.setEnabled(bluetoothEnabled || networkName != null);
 	}
 
 	public void onClick(View view) {

briar-android/src/net/sf/briar/android/invitation/ConnectionView.java

@@ -52,7 +52,7 @@ public class ConnectionView extends AddContactView {
 			addView(innerLayout);
 		}
 
-		if(container.getUseBluetooth()) {
+		if(container.isBluetoothEnabled()) {
 			LinearLayout innerLayout = new LinearLayout(ctx);
 			innerLayout.setOrientation(HORIZONTAL);
 			innerLayout.setGravity(CENTER);

briar-android/src/net/sf/briar/android/invitation/NetworkSetupView.java

@@ -21,11 +21,12 @@ import android.widget.Spinner;
 import android.widget.TextView;
 
 public class NetworkSetupView extends AddContactView
-implements WifiStateListener, BluetoothStateListener, OnItemSelectedListener,
-OnClickListener {
+implements OnItemSelectedListener, OnClickListener {
 
 	private LocalAuthorSpinnerAdapter adapter = null;
 	private Spinner spinner = null;
+	private WifiWidget wifi = null;
+	private BluetoothWidget bluetooth = null;
 	private Button continueButton = null;
 
 	NetworkSetupView(Context ctx) {
@@ -55,12 +56,12 @@ OnClickListener {
 		innerLayout.addView(spinner);
 		addView(innerLayout);
 
-		WifiWidget wifi = new WifiWidget(ctx);
-		wifi.init(this);
+		wifi = new WifiWidget(ctx);
+		wifi.init();
 		addView(wifi);
 
-		BluetoothWidget bluetooth = new BluetoothWidget(ctx);
-		bluetooth.init(this);
+		bluetooth = new BluetoothWidget(ctx);
+		bluetooth.init();
 		addView(bluetooth);
 
 		TextView faceToFace = new TextView(ctx);
@@ -78,30 +79,22 @@ OnClickListener {
 		addView(continueButton);
 	}
 
-	public void wifiStateChanged(final String networkName) {
-		container.runOnUiThread(new Runnable() {
-			public void run() {
-				container.setNetworkName(networkName);
-				enableOrDisableContinueButton();
-			}
-		});
+	void wifiStateChanged() {
+		if(wifi != null) wifi.populate();
+		enableOrDisableContinueButton();
 	}
 
-	public void bluetoothStateChanged(final boolean enabled) {
-		container.runOnUiThread(new Runnable() {
-			public void run() {
-				container.setUseBluetooth(enabled);
-				enableOrDisableContinueButton();
-			}
-		});
+	void bluetoothStateChanged() {
+		if(bluetooth != null) bluetooth.populate();
+		enableOrDisableContinueButton();
 	}
 
 	private void enableOrDisableContinueButton() {
 		if(continueButton == null) return; // Activity not created yet
 		AuthorId localAuthorId = container.getLocalAuthorId();
-		boolean useBluetooth = container.getUseBluetooth();
+		boolean bluetoothEnabled = container.isBluetoothEnabled();
 		String networkName = container.getNetworkName();
-		boolean networkAvailable = useBluetooth || networkName != null;
+		boolean networkAvailable = bluetoothEnabled || networkName != null;
 		continueButton.setEnabled(localAuthorId != null && networkAvailable);
 	}
 

briar-android/src/net/sf/briar/android/invitation/WifiStateListener.java

-package net.sf.briar.android.invitation;
-
-interface WifiStateListener {
-
-	void wifiStateChanged(String networkName);
-}

briar-android/src/net/sf/briar/android/invitation/WifiWidget.java

@@ -18,14 +18,11 @@ import android.widget.TextView;
 
 public class WifiWidget extends LinearLayout implements OnClickListener {
 
-	private WifiStateListener listener = null;
-
 	public WifiWidget(Context ctx) {
 		super(ctx);
 	}
 
-	void init(WifiStateListener listener) {
-		this.listener = listener;
+	void init() {
 		setOrientation(HORIZONTAL);
 		setGravity(CENTER);
 		populate();
@@ -40,7 +37,6 @@ public class WifiWidget extends LinearLayout implements OnClickListener {
 		status.setLayoutParams(WRAP_WRAP_1);
 		WifiManager wifi = (WifiManager) ctx.getSystemService(WIFI_SERVICE);
 		if(wifi == null) {
-			wifiStateChanged(null);
 			ImageView warning = new ImageView(ctx);
 			warning.setPadding(5, 5, 5, 5);
 			warning.setImageResource(R.drawable.alerts_and_states_warning);
@@ -52,7 +48,6 @@ public class WifiWidget extends LinearLayout implements OnClickListener {
 			String networkName =  info.getSSID();
 			int networkId = info.getNetworkId();
 			if(networkName == null || networkId == -1) {
-				wifiStateChanged(null);
 				ImageView warning = new ImageView(ctx);
 				warning.setPadding(5, 5, 5, 5);
 				warning.setImageResource(R.drawable.alerts_and_states_warning);
@@ -64,7 +59,6 @@ public class WifiWidget extends LinearLayout implements OnClickListener {
 				settings.setOnClickListener(this);
 				addView(settings);
 			} else {
-				wifiStateChanged(networkName);
 				ImageView ok = new ImageView(ctx);
 				ok.setPadding(5, 5, 5, 5);
 				ok.setImageResource(R.drawable.navigation_accept);
@@ -79,7 +73,6 @@ public class WifiWidget extends LinearLayout implements OnClickListener {
 				addView(settings);
 			}
 		} else {
-			wifiStateChanged(null);
 			ImageView warning = new ImageView(ctx);
 			warning.setPadding(5, 5, 5, 5);
 			warning.setImageResource(R.drawable.alerts_and_states_warning);
@@ -93,10 +86,6 @@ public class WifiWidget extends LinearLayout implements OnClickListener {
 		}
 	}
 
-	private void wifiStateChanged(String networkName) {
-		if(listener != null) listener.wifiStateChanged(networkName);
-	}
-
 	public void onClick(View view) {
 		getContext().startActivity(new Intent(ACTION_WIFI_SETTINGS));
 	}