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  • akwizgran/hotspot
  • grote/hotspot
  • briar/hotspot
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.idea/codeStyleSettings.xml 0 → 100644
View file @ 6a39a620
<?xml version="1.0" encoding="UTF-8"?>
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<AndroidXmlCodeStyleSettings>
<option name="USE_CUSTOM_SETTINGS" value="true" />
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<option name="RELEASE_STYLE" value="IVAR" />
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<file>
<option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Import" />
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<extensions>
<pair source="cpp" header="h" />
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<XML>
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<codeStyleSettings language="Groovy">
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<section>
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</section>
<section>
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<section>
<rule>
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<NAME>style</NAME>
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<rule>
<match>
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<rule>
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\ No newline at end of file
.idea/codeStyles/Project.xml
View file @ 6a39a620
<component name="ProjectCodeStyleConfiguration">
<code_scheme name="Project" version="173">
<JavaCodeStyleSettings>
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<option name="ASSERT_STATEMENT_WRAP" value="1" />
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<rules>
......@@ -112,5 +194,11 @@
</rules>
</arrangement>
</codeStyleSettings>
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<option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
<option name="PARAMETER_ANNOTATION_WRAP" value="1" />
<option name="VARIABLE_ANNOTATION_WRAP" value="1" />
<option name="ENUM_CONSTANTS_WRAP" value="1" />
</codeStyleSettings>
</code_scheme>
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\ No newline at end of file
.idea/codeStyles/codeStyleConfig.xml 0 → 100644
View file @ 6a39a620
<component name="ProjectCodeStyleConfiguration">
<state>
<option name="USE_PER_PROJECT_SETTINGS" value="true" />
</state>
</component>
\ No newline at end of file
.idea/saveactions_settings.xml 0 → 100644
View file @ 6a39a620
<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="SaveActionSettings">
<option name="actions">
<set>
<option value="activate" />
<option value="organizeImports" />
<option value="reformat" />
</set>
</option>
<option name="configurationPath" value="" />
</component>
</project>
\ No newline at end of file
app/build.gradle
View file @ 6a39a620
......@@ -2,7 +2,7 @@ apply plugin: 'com.android.application'
android {
compileSdkVersion 30
buildToolsVersion "30.0.2"
buildToolsVersion "30.0.3"
defaultConfig {
applicationId "org.briarproject.hotspot"
minSdkVersion 16
......@@ -23,8 +23,11 @@ android {
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'androidx.appcompat:appcompat:1.2.0'
implementation 'androidx.fragment:fragment:1.3.3'
implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
implementation 'com.google.android.material:material:1.3.0'
implementation 'com.google.zxing:core:3.4.0'
implementation 'org.nanohttpd:nanohttpd:2.3.1'
implementation 'org.jsoup:jsoup:1.11.3'
}
app/src/main/AndroidManifest.xml
View file @ 6a39a620
......@@ -3,6 +3,7 @@
xmlns:tools="http://schemas.android.com/tools"
package="org.briarproject.hotspot">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
......
app/src/main/assets/hotspot.html 0 → 100644
View file @ 6a39a620
<html>
<head>
<meta content="text/html;charset=utf-8" http-equiv="Content-Type">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
body {
background-color: #F2F2F2;
font-family: Roboto,Arial,Helvetica,sans-serif;
font-size: 14px;
margin: 0;
height: 100%;
}
div#top {
background-color: #FFFFFF;
padding: 16px;
}
div#bottom {
padding: 16px 32px;
margin-top: 12px;
}
a.button {
background-color: #82C91E;
width: 100%;
display: block;
box-sizing: border-box;
padding: 12px 32px !important;
border: 1px solid transparent;
border-radius: 2px;
color: #000000 !important;
cursor: pointer;
font-weight: 500;
text-decoration: none;
text-transform: uppercase;
text-align: center;
margin: 20px auto 20px auto;
}
ol {
list-style: none;
counter-reset: briar-counter;
padding-left: 40px;
}
ol li {
counter-increment: briar-counter;
margin-bottom: 2em;
}
ol li::before {
content: counter(briar-counter);
background-color: #82C91E;
color: #000000 !important;
font-weight: bold;
border-radius: 70px;
width: 24px;
height: 24px;
line-height: 24px;
text-align: center;
position: absolute;
left: 32px;
}
</style>
</head>
<body>
<div id="top">
<svg style="width:156px;height:47px;" viewBox="0 0 778 235">
<path style="fill:#87c214"
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</svg>
<h2 id="download_title">Download Briar 1.2.20</h2>
<span id="download_intro">Someone nearby shared Briar with you.</span>
<a href="/app.apk" class="button">
<svg aria-hidden="true" style="width:24px;height:24px;margin-right:6px;vertical-align:middle;"
viewBox="0 0 24 24">
<path fill="currentColor" d="M5,20H19V18H5M19,9H15V3H9V9H5L12,16L19,9Z"/>
</svg>
<span id="download_button">Download Briar</span>
</a>
<span id="download_outro">After the download is complete, open the downloaded file and install it.</span>
</div>
<div id="bottom">
<h3 id="troubleshooting_title">Troubleshooting</h3>
<ol>
<li id="troubleshooting_1">If you can't download the app, try it with a different web
browser app.
</li>
<li id="troubleshooting_2">Ensure that your browser is allowed to download apps directly by
giving it the permission or enabling the installation of apps from "Unknown Sources" in
system settings.
</li>
</ol>
</div>
</body>
</html>
app/src/main/java/org/briarproject/hotspot/AbstractConditionManager.java 0 → 100644
View file @ 6a39a620
package org.briarproject.hotspot;
import android.net.wifi.WifiManager;
import androidx.core.util.Consumer;
import androidx.fragment.app.FragmentActivity;
import static android.content.Context.WIFI_SERVICE;
/**
* Abstract base class for the ConditionManagers that ensure that the conditions
* to open a hotspot are fulfilled. There are different extensions of this for
* API levels lower than 29 and 29+.
*/
abstract class AbstractConditionManager {
enum Permission {
UNKNOWN, GRANTED, SHOW_RATIONALE, PERMANENTLY_DENIED
}
protected final Consumer<Boolean> permissionUpdateCallback;
protected FragmentActivity ctx;
protected WifiManager wifiManager;
AbstractConditionManager(Consumer<Boolean> permissionUpdateCallback) {
this.permissionUpdateCallback = permissionUpdateCallback;
}
/**
* Pass a FragmentActivity context here during `onCreateView()`.
*/
void init(FragmentActivity ctx) {
this.ctx = ctx;
this.wifiManager = (WifiManager) ctx.getApplicationContext()
.getSystemService(WIFI_SERVICE);
}
/**
* Call this during onStart() in the fragment where the ConditionManager
* is used.
*/
abstract void onStart();
/**
* Check if all required conditions are met such that the hotspot can be
* started. If any precondition is not met yet, bring up relevant dialogs
* asking the user to grant relevant permissions or take relevant actions.
*
* @return true if conditions are fulfilled and flow can continue.
*/
abstract boolean checkAndRequestConditions();
}
app/src/main/java/org/briarproject/hotspot/ConditionManager.java 0 → 100644
View file @ 6a39a620
package org.briarproject.hotspot;
import android.content.Intent;
import android.provider.Settings;
import java.util.logging.Logger;
import androidx.activity.result.ActivityResultCaller;
import androidx.activity.result.ActivityResultLauncher;
import androidx.activity.result.contract.ActivityResultContracts.StartActivityForResult;
import androidx.core.util.Consumer;
import static java.util.logging.Level.INFO;
import static java.util.logging.Logger.getLogger;
import static org.briarproject.hotspot.UiUtils.showRationale;
/**
* This class ensures that the conditions to open a hotspot are fulfilled on
* API levels < 29.
* <p>
* As soon as {@link #checkAndRequestConditions()} returns true,
* all conditions are fulfilled.
*/
class ConditionManager extends AbstractConditionManager {
private static final Logger LOG =
getLogger(ConditionManager.class.getName());
private final ActivityResultLauncher<Intent> wifiRequest;
ConditionManager(ActivityResultCaller arc,
Consumer<Boolean> permissionUpdateCallback) {
super(permissionUpdateCallback);
wifiRequest = arc.registerForActivityResult(
new StartActivityForResult(),
result -> permissionUpdateCallback
.accept(wifiManager.isWifiEnabled()));
}
@Override
void onStart() {
// nothing to do here
}
private boolean areEssentialPermissionsGranted() {
if (LOG.isLoggable(INFO)) {
LOG.info(String.format("areEssentialPermissionsGranted(): " +
"wifiManager.isWifiEnabled()? %b",
wifiManager.isWifiEnabled()));
}
return wifiManager.isWifiEnabled();
}
@Override
boolean checkAndRequestConditions() {
if (areEssentialPermissionsGranted()) return true;
if (!wifiManager.isWifiEnabled()) {
// Try enabling the Wifi and return true if that seems to have been
// successful, i.e. "Wifi is either already in the requested state, or
// in progress toward the requested state".
if (wifiManager.setWifiEnabled(true)) {
LOG.info("Enabled wifi");
return true;
}
// Wifi is not enabled and we can't seem to enable it, so ask the user
// to enable it for us.
showRationale(ctx, R.string.wifi_settings_title,
R.string.wifi_settings_request_enable_body,
this::requestEnableWiFi,
() -> permissionUpdateCallback.accept(false));
}
return false;
}
private void requestEnableWiFi() {
wifiRequest.launch(new Intent(Settings.ACTION_WIFI_SETTINGS));
}
}
app/src/main/java/org/briarproject/hotspot/ConditionManager29.java 0 → 100644
View file @ 6a39a620
package org.briarproject.hotspot;
import android.content.Intent;
import android.provider.Settings;
import java.util.logging.Logger;
import androidx.activity.result.ActivityResultCaller;
import androidx.activity.result.ActivityResultLauncher;
import androidx.activity.result.contract.ActivityResultContracts.RequestPermission;
import androidx.activity.result.contract.ActivityResultContracts.StartActivityForResult;
import androidx.annotation.Nullable;
import androidx.annotation.RequiresApi;
import androidx.core.util.Consumer;
import static android.Manifest.permission.ACCESS_FINE_LOCATION;
import static androidx.core.app.ActivityCompat.shouldShowRequestPermissionRationale;
import static java.lang.Boolean.TRUE;
import static java.util.logging.Level.INFO;
import static java.util.logging.Logger.getLogger;
import static org.briarproject.hotspot.UiUtils.getGoToSettingsListener;
import static org.briarproject.hotspot.UiUtils.showDenialDialog;
import static org.briarproject.hotspot.UiUtils.showRationale;
/**
* This class ensures that the conditions to open a hotspot are fulfilled on
* API levels >= 29.
* <p>
* As soon as {@link #checkAndRequestConditions()} returns true,
* all conditions are fulfilled.
*/
@RequiresApi(29)
class ConditionManager29 extends AbstractConditionManager {
private static final Logger LOG =
getLogger(ConditionManager29.class.getName());
private Permission locationPermission = Permission.UNKNOWN;
private final ActivityResultLauncher<String> locationRequest;
private final ActivityResultLauncher<Intent> wifiRequest;
ConditionManager29(ActivityResultCaller arc,
Consumer<Boolean> permissionUpdateCallback) {
super(permissionUpdateCallback);
locationRequest = arc.registerForActivityResult(
new RequestPermission(), granted -> {
onRequestPermissionResult(granted);
permissionUpdateCallback.accept(TRUE.equals(granted));
});
wifiRequest = arc.registerForActivityResult(
new StartActivityForResult(),
result -> permissionUpdateCallback
.accept(wifiManager.isWifiEnabled()));
}
@Override
void onStart() {
locationPermission = Permission.UNKNOWN;
}
private boolean areEssentialPermissionsGranted() {
if (LOG.isLoggable(INFO)) {
LOG.info(String.format("areEssentialPermissionsGranted(): " +
"locationPermission? %s, " +
"wifiManager.isWifiEnabled()? %b",
locationPermission,
wifiManager.isWifiEnabled()));
}
return locationPermission == Permission.GRANTED &&
wifiManager.isWifiEnabled();
}
@Override
boolean checkAndRequestConditions() {
if (areEssentialPermissionsGranted()) return true;
if (locationPermission == Permission.UNKNOWN) {
locationRequest.launch(ACCESS_FINE_LOCATION);
return false;
}
// If the location permission has been permanently denied, ask the
// user to change the setting
if (locationPermission == Permission.PERMANENTLY_DENIED) {
showDenialDialog(ctx, R.string.permission_location_title,
R.string.permission_hotspot_location_denied_body,
getGoToSettingsListener(ctx),
() -> permissionUpdateCallback.accept(false));
return false;
}
// Should we show the rationale for location permission?
if (locationPermission == Permission.SHOW_RATIONALE) {
showRationale(ctx, R.string.permission_location_title,
R.string.permission_hotspot_location_request_body,
this::requestPermissions,
() -> permissionUpdateCallback.accept(false));
return false;
}
// If Wifi is not enabled, we show the rationale for enabling Wifi?
if (!wifiManager.isWifiEnabled()) {
showRationale(ctx, R.string.wifi_settings_title,
R.string.wifi_settings_request_enable_body,
this::requestEnableWiFi,
() -> permissionUpdateCallback.accept(false));
return false;
}
// we shouldn't usually reach this point, but if we do, return false
// anyway to force a recheck. Maybe some condition changed in the
// meantime.
return false;
}
private void onRequestPermissionResult(@Nullable Boolean granted) {
if (granted != null && granted) {
locationPermission = Permission.GRANTED;
} else if (shouldShowRequestPermissionRationale(ctx,
ACCESS_FINE_LOCATION)) {
locationPermission = Permission.SHOW_RATIONALE;
} else {
locationPermission = Permission.PERMANENTLY_DENIED;
}
}
private void requestPermissions() {
locationRequest.launch(ACCESS_FINE_LOCATION);
}
private void requestEnableWiFi() {
wifiRequest.launch(new Intent(Settings.Panel.ACTION_WIFI));
}
}
app/src/main/java/org/briarproject/hotspot/HotspotFragment.java 0 → 100644
View file @ 6a39a620
package org.briarproject.hotspot;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import org.briarproject.hotspot.HotspotState.HotspotError;
import org.briarproject.hotspot.HotspotState.HotspotStarted;
import org.briarproject.hotspot.HotspotState.HotspotStopped;
import org.briarproject.hotspot.HotspotState.NetworkConfig;
import org.briarproject.hotspot.HotspotState.StartingHotspot;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.ViewModelProvider;
import static android.os.Build.VERSION.SDK_INT;
import static android.view.View.GONE;
import static android.view.View.VISIBLE;
import static org.briarproject.hotspot.HotspotManager.UNKNOWN_FREQUENCY;
import static org.briarproject.hotspot.QrCodeUtils.createQrCode;
import static org.briarproject.hotspot.QrCodeUtils.createWifiLoginString;
public class HotspotFragment extends Fragment {
private MainViewModel viewModel;
private ImageView qrCode;
private TextView ssidView, passwordView, statusView;
private Button button, serverButton;
private boolean hotspotStarted = false;
private final AbstractConditionManager conditionManager = SDK_INT < 29 ?
new ConditionManager(this, this::onPermissionUpdate) :
new ConditionManager29(this, this::onPermissionUpdate);
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
viewModel = new ViewModelProvider(requireActivity())
.get(MainViewModel.class);
conditionManager.init(requireActivity());
return inflater.inflate(R.layout.fragment_hotspot, container, false);
}
@Override
public void onViewCreated(@NonNull View v,
@Nullable Bundle savedInstanceState) {
super.onViewCreated(v, savedInstanceState);
qrCode = v.findViewById(R.id.qr_code);
ssidView = v.findViewById(R.id.ssid);
passwordView = v.findViewById(R.id.password);
statusView = v.findViewById(R.id.status);
button = v.findViewById(R.id.button);
button.setOnClickListener(this::onButtonClick);
serverButton = v.findViewById(R.id.serverButton);
serverButton.setOnClickListener(this::onServerButtonClick);
viewModel.getIs5GhzSupported().observe(getViewLifecycleOwner(),
b -> statusView
.setText(getString(R.string.wifi_5ghz_supported)));
viewModel.getStatus().observe(getViewLifecycleOwner(), state -> {
if (state instanceof StartingHotspot) {
statusView.setText(getString(R.string.starting_hotspot));
} else if (state instanceof HotspotStarted) {
onHotspotStarted((HotspotStarted) state);
} else if (state instanceof HotspotStopped) {
onHotspotStopped();
} else if (state instanceof HotspotError) {
onHotspotError((HotspotError) state);
}
});
}
private void onHotspotStarted(HotspotStarted state) {
button.setText(R.string.stop_hotspot);
button.setEnabled(true);
hotspotStarted = true;
NetworkConfig config = state.getConfig();
if (config.frequency == UNKNOWN_FREQUENCY)
statusView.setText(getString(R.string.start_callback_started));
else
statusView.setText(getString(R.string.start_callback_started_freq,
config.frequency));
String qrCodeText = createWifiLoginString(config.ssid,
config.password);
// TODO: heavy operation should be handed off to worker thread,
// potentially within the view model and provide it together
// with NetworkConfig?
Bitmap qrCodeBitmap = createQrCode(
getResources().getDisplayMetrics(), qrCodeText);
if (qrCodeBitmap == null) {
qrCode.setVisibility(GONE);
} else {
qrCode.setImageBitmap(qrCodeBitmap);
qrCode.setVisibility(VISIBLE);
}
ssidView.setText(getString(R.string.ssid, config.ssid));
passwordView.setText(getString(R.string.password, config.password));
serverButton.setVisibility(VISIBLE);
}
private void onHotspotStopped() {
qrCode.setVisibility(GONE);
ssidView.setText("");
passwordView.setText("");
button.setText(R.string.start_hotspot);
button.setEnabled(true);
hotspotStarted = false;
statusView.setText(getString(R.string.hotspot_stopped));
serverButton.setVisibility(GONE);
}
private void onHotspotError(HotspotError state) {
onHotspotStopped();
statusView.setText(state.getError());
}
@Override
public void onStart() {
super.onStart();
conditionManager.onStart();
}
private void onButtonClick(View view) {
button.setEnabled(false);
if (hotspotStarted) {
// the hotspot is currently started → stop it
viewModel.stopWifiP2pHotspot();
} else {
// the hotspot is currently stopped → start it
startWifiP2pHotspotIfConditionsFulfilled();
}
}
private void startWifiP2pHotspotIfConditionsFulfilled() {
if (conditionManager.checkAndRequestConditions()) {
viewModel.startWifiP2pHotspot();
}
}
private void onPermissionUpdate(boolean recheckPermissions) {
button.setEnabled(true);
if (recheckPermissions) {
startWifiP2pHotspotIfConditionsFulfilled();
}
}
public void onServerButtonClick(View view) {
getParentFragmentManager().beginTransaction()
.replace(R.id.fragment_container, new ServerFragment())
.addToBackStack(null)
.commit();
}
}
app/src/main/java/org/briarproject/hotspot/HotspotManager.java 0 → 100644
View file @ 6a39a620
package org.briarproject.hotspot;
import android.annotation.SuppressLint;
import android.content.Context;
import android.net.wifi.WifiManager;
import android.net.wifi.WifiManager.WifiLock;
import android.net.wifi.p2p.WifiP2pConfig;
import android.net.wifi.p2p.WifiP2pGroup;
import android.net.wifi.p2p.WifiP2pManager;
import android.net.wifi.p2p.WifiP2pManager.ActionListener;
import android.net.wifi.p2p.WifiP2pManager.Channel;
import android.os.Handler;
import android.os.PowerManager;
import android.os.PowerManager.WakeLock;
import org.briarproject.hotspot.HotspotState.NetworkConfig;
import java.util.logging.Logger;
import androidx.annotation.Nullable;
import androidx.annotation.RequiresApi;
import androidx.annotation.UiThread;
import static android.content.Context.POWER_SERVICE;
import static android.content.Context.WIFI_P2P_SERVICE;
import static android.content.Context.WIFI_SERVICE;
import static android.net.wifi.WifiManager.WIFI_MODE_FULL;
import static android.net.wifi.WifiManager.WIFI_MODE_FULL_HIGH_PERF;
import static android.net.wifi.p2p.WifiP2pConfig.GROUP_OWNER_BAND_2GHZ;
import static android.net.wifi.p2p.WifiP2pManager.BUSY;
import static android.net.wifi.p2p.WifiP2pManager.ERROR;
import static android.net.wifi.p2p.WifiP2pManager.NO_SERVICE_REQUESTS;
import static android.net.wifi.p2p.WifiP2pManager.P2P_UNSUPPORTED;
import static android.os.Build.VERSION.SDK_INT;
import static android.os.PowerManager.FULL_WAKE_LOCK;
import static java.util.logging.Level.INFO;
import static java.util.logging.Logger.getLogger;
import static org.briarproject.hotspot.StringUtils.getRandomString;
class HotspotManager {
interface HotspotListener {
void onStartingHotspot();
void onHotspotStarted(NetworkConfig networkConfig);
void onDeviceConnected();
void onHotspotStopped();
void onHotspotError(String error);
}
private static final Logger LOG = getLogger(HotspotManager.class.getName());
private static final int MAX_FRAMEWORK_ATTEMPTS = 5;
private static final int MAX_GROUP_INFO_ATTEMPTS = 5;
private static final int RETRY_DELAY_MILLIS = 1000;
static final double UNKNOWN_FREQUENCY = Double.NEGATIVE_INFINITY;
private final Context ctx;
private final HotspotListener listener;
private final WifiManager wifiManager;
private final WifiP2pManager wifiP2pManager;
private final PowerManager powerManager;
private final Handler handler;
private final String lockTag;
@Nullable
// on API < 29 this is null because we cannot request a custom network name
private String networkName = null;
private WifiLock wifiLock;
private WakeLock wakeLock;
private Channel channel;
HotspotManager(Context ctx, HotspotListener listener) {
this.ctx = ctx;
this.listener = listener;
wifiManager = (WifiManager) ctx.getApplicationContext()
.getSystemService(WIFI_SERVICE);
wifiP2pManager =
(WifiP2pManager) ctx.getSystemService(WIFI_P2P_SERVICE);
powerManager = (PowerManager) ctx.getSystemService(POWER_SERVICE);
handler = new Handler(ctx.getMainLooper());
lockTag = ctx.getPackageName() + ":app-sharing-hotspot";
}
@UiThread
void startWifiP2pHotspot() {
if (wifiP2pManager == null) {
listener.onHotspotError(ctx.getString(R.string.no_wifi_direct));
return;
}
listener.onStartingHotspot();
acquireLocks();
startWifiP2pFramework(1);
}
/**
* As soon as Wifi is enabled, we try starting the WifiP2p framework.
* If Wifi has just been enabled, it is possible that will fail. If that
* happens we try again for MAX_FRAMEWORK_ATTEMPTS times after a delay of
* RETRY_DELAY_MILLIS after each attempt.
* <p>
* Rationale: it can take a few milliseconds for WifiP2p to become available
* after enabling Wifi. Depending on the API level it is possible to check this
* using {@link WifiP2pManager#requestP2pState} or register a BroadcastReceiver
* on the WIFI_P2P_STATE_CHANGED_ACTION to get notified when WifiP2p is really
* available. Trying to implement a solution that works reliably using these
* checks turned out to be a long rabbit-hole with lots of corner cases and
* workarounds for specific situations.
* Instead we now rely on this trial-and-error approach of just starting
* the framework and retrying if it fails.
* <p>
* We'll realize that the framework is busy when the ActionListener passed
* to {@link WifiP2pManager#createGroup} is called with onFailure(BUSY)
*/
void startWifiP2pFramework(int attempt) {
if (LOG.isLoggable(INFO))
LOG.info("startWifiP2pFramework attempt: " + attempt);
/*
* It is important that we call WifiP2pManager#initialize again
* for every attempt to starting the framework because otherwise,
* createGroup() will continue to fail with a BUSY state.
*/
channel = wifiP2pManager.initialize(ctx, ctx.getMainLooper(), null);
if (channel == null) {
listener.onHotspotError(ctx.getString(R.string.no_wifi_direct));
return;
}
ActionListener listener = new ActionListener() {
@Override
// Callback for wifiP2pManager#createGroup() during startWifiP2pHotspot()
public void onSuccess() {
requestGroupInfo(1);
}
@Override
// Callback for wifiP2pManager#createGroup() during startWifiP2pHotspot()
public void onFailure(int reason) {
LOG.info("onFailure: " + reason);
if (reason == BUSY) {
// WifiP2p not ready yet or hotspot already running
restartWifiP2pFramework(attempt);
} else if (reason == P2P_UNSUPPORTED) {
releaseHotspotWithError(ctx.getString(
R.string.start_callback_failed, "p2p unsupported"));
} else if (reason == ERROR) {
releaseHotspotWithError(ctx.getString(
R.string.start_callback_failed, "p2p error"));
} else if (reason == NO_SERVICE_REQUESTS) {
releaseHotspotWithError(ctx.getString(
R.string.start_callback_failed,
"no service requests"));
} else {
// all cases covered, in doubt set to error
releaseHotspotWithError(ctx.getString(
R.string.start_callback_failed_unknown, reason));
}
}
};
try {
if (SDK_INT >= 29) {
networkName = getNetworkName();
String passphrase = getPassphrase();
// TODO: maybe remove this in the production version
if (LOG.isLoggable(INFO))
LOG.info("networkName: " + networkName);
WifiP2pConfig config = new WifiP2pConfig.Builder()
.setGroupOperatingBand(GROUP_OWNER_BAND_2GHZ)
.setNetworkName(networkName)
.setPassphrase(passphrase)
.build();
wifiP2pManager.createGroup(channel, config, listener);
} else {
wifiP2pManager.createGroup(channel, listener);
}
} catch (SecurityException e) {
// this should never happen, because we request permissions before
throw new AssertionError(e);
}
}
private void restartWifiP2pFramework(int attempt) {
LOG.info("retrying to start WifiP2p framework");
if (attempt < MAX_FRAMEWORK_ATTEMPTS) {
handler.postDelayed(() -> startWifiP2pFramework(attempt + 1),
RETRY_DELAY_MILLIS);
} else {
releaseHotspotWithError(
ctx.getString(R.string.stop_framework_busy));
}
}
@RequiresApi(29)
private String getNetworkName() {
return "DIRECT-" + getRandomString(2) + "-" +
getRandomString(10);
}
private String getPassphrase() {
return getRandomString(8);
}
@UiThread
void stopWifiP2pHotspot() {
if (channel == null) return;
wifiP2pManager.removeGroup(channel, new ActionListener() {
@Override
public void onSuccess() {
releaseHotspot();
}
@Override
public void onFailure(int reason) {
releaseHotspotWithError(ctx.getString(
R.string.stop_callback_failed, reason));
}
});
}
@SuppressLint("WakelockTimeout")
private void acquireLocks() {
// WIFI_MODE_FULL has no effect on API >= 29
int lockType =
SDK_INT >= 29 ? WIFI_MODE_FULL_HIGH_PERF : WIFI_MODE_FULL;
wifiLock = wifiManager.createWifiLock(lockType, lockTag);
wifiLock.acquire();
// FLAG_KEEP_SCREEN_ON is not respected on some Huawei devices.
wakeLock = powerManager.newWakeLock(FULL_WAKE_LOCK, lockTag);
wakeLock.acquire();
}
private void releaseHotspot() {
listener.onHotspotStopped();
closeChannelAndReleaseLock();
}
private void releaseHotspotWithError(String error) {
listener.onHotspotError(error);
closeChannelAndReleaseLock();
}
private void closeChannelAndReleaseLock() {
if (SDK_INT >= 27) channel.close();
channel = null;
wifiLock.release();
wakeLock.release();
}
private void requestGroupInfo(int attempt) {
if (LOG.isLoggable(INFO))
LOG.info("requestGroupInfo attempt: " + attempt);
WifiP2pManager.GroupInfoListener groupListener = group -> {
boolean valid = isGroupValid(group);
// If the group is valid, set the hotspot to started. If we don't
// have any attempts left and we have anything more or less usable,
// we try what we got
if (valid) {
// group is valid
onHotspotStarted(group);
} else if (attempt < MAX_GROUP_INFO_ATTEMPTS) {
// group invalid and we have attempts left
retryRequestingGroupInfo(attempt);
} else if (group != null) {
// no attempts left, try what we got
onHotspotStarted(group);
} else {
// no attempts left, group is null
releaseHotspotWithError(
ctx.getString(R.string.start_no_attempts_left));
}
};
try {
if (channel == null) return;
wifiP2pManager.requestGroupInfo(channel, groupListener);
} catch (SecurityException e) {
throw new AssertionError(e);
}
}
private void onHotspotStarted(WifiP2pGroup group) {
double frequency = UNKNOWN_FREQUENCY;
if (SDK_INT >= 29) {
frequency = ((double) group.getFrequency()) / 1000;
}
listener.onHotspotStarted(new NetworkConfig(
group.getNetworkName(), group.getPassphrase(),
frequency));
requestGroupInfoForConnection();
}
private void requestGroupInfoForConnection() {
if (LOG.isLoggable(INFO))
LOG.info("requestGroupInfo for connection");
WifiP2pManager.GroupInfoListener groupListener = group -> {
if (group == null || group.getClientList().isEmpty()) {
handler.postDelayed(this::requestGroupInfoForConnection,
RETRY_DELAY_MILLIS);
} else {
if (LOG.isLoggable(INFO)) {
LOG.info("client list " + group.getClientList());
}
listener.onDeviceConnected();
}
};
try {
if (channel == null) return;
wifiP2pManager.requestGroupInfo(channel, groupListener);
} catch (SecurityException e) {
throw new AssertionError(e);
}
}
private boolean isGroupValid(@Nullable WifiP2pGroup group) {
if (group == null) {
LOG.info("group is null");
return false;
} else if (!group.getNetworkName().startsWith("DIRECT-")) {
if (LOG.isLoggable(INFO)) {
LOG.info("received networkName without prefix 'DIRECT-': " +
group.getNetworkName());
}
return false;
} else if (networkName != null &&
!networkName.equals(group.getNetworkName())) {
if (LOG.isLoggable(INFO)) {
LOG.info("expected networkName: " + networkName);
LOG.info("received networkName: " + group.getNetworkName());
}
return false;
}
return true;
}
private void retryRequestingGroupInfo(int attempt) {
LOG.info("retrying to request group info");
// On some devices we need to wait for the group info to become available
if (attempt < MAX_GROUP_INFO_ATTEMPTS) {
handler.postDelayed(() -> requestGroupInfo(attempt + 1),
RETRY_DELAY_MILLIS);
} else {
releaseHotspotWithError(
ctx.getString(R.string.start_callback_no_group_info));
}
}
}
app/src/main/java/org/briarproject/hotspot/HotspotState.java 0 → 100644
View file @ 6a39a620
package org.briarproject.hotspot;
abstract class HotspotState {
static class StartingHotspot extends HotspotState {
}
static class NetworkConfig {
final String ssid, password;
final double frequency;
NetworkConfig(String ssid, String password, double frequency) {
this.ssid = ssid;
this.password = password;
this.frequency = frequency;
}
}
static class HotspotStarted extends HotspotState {
private final NetworkConfig config;
private final String url;
HotspotStarted(NetworkConfig config, String url) {
this.config = config;
this.url = url;
}
NetworkConfig getConfig() {
return config;
}
String getUrl() {
return url;
}
}
static class HotspotStopped extends HotspotState {
}
static class HotspotError extends HotspotState {
private final String error;
HotspotError(String error) {
this.error = error;
}
String getError() {
return error;
}
}
}
app/src/main/java/org/briarproject/hotspot/InterfacesFragment.java 0 → 100644
View file @ 6a39a620
package org.briarproject.hotspot;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
public class InterfacesFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_interfaces, container, false);
}
@Override
public void onViewCreated(@NonNull View v,
@Nullable Bundle savedInstanceState) {
super.onViewCreated(v, savedInstanceState);
TextView textView = v.findViewById(R.id.text);
textView.setText(NetworkUtils.getNetworkInterfaceSummary());
}
}
app/src/main/java/org/briarproject/hotspot/LogUtils.java 0 → 100644
View file @ 6a39a620
package org.briarproject.hotspot;
import java.util.logging.Level;
import java.util.logging.Logger;
public class LogUtils {
public static void logException(Logger logger, Level level, Throwable t) {
if (logger.isLoggable(level)) logger.log(level, t.toString(), t);
}
}
app/src/main/java/org/briarproject/hotspot/MainActivity.java
View file @ 6a39a620
package org.briarproject.hotspot;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;
import androidx.lifecycle.ViewModelProvider;
import static android.Manifest.permission.ACCESS_FINE_LOCATION;
import static android.content.pm.PackageManager.PERMISSION_GRANTED;
import static android.os.Build.VERSION.SDK_INT;
import static android.view.View.GONE;
import static android.view.View.VISIBLE;
import static org.briarproject.hotspot.QrCodeUtils.createQrCode;
import static org.briarproject.hotspot.QrCodeUtils.createWifiLoginString;
public class MainActivity extends AppCompatActivity {
private MainViewModel viewModel;
private ImageView qrCode;
private TextView ssidView, passwordView, statusView;
private Button button;
private boolean hotspotStarted = false;
MainViewModel viewModel;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewModel = new ViewModelProvider(this).get(MainViewModel.class);
viewModel.setApplication(getApplication());
qrCode = findViewById(R.id.qr_code);
ssidView = findViewById(R.id.ssid);
passwordView = findViewById(R.id.password);
statusView = findViewById(R.id.status);
button = findViewById(R.id.button);
viewModel.getWifiConfiguration().observe(this, config -> {
if (config == null) {
qrCode.setVisibility(GONE);
ssidView.setText("");
passwordView.setText("");
button.setText(R.string.start_hotspot);
button.setEnabled(true);
hotspotStarted = false;
} else {
String qrCodeText = createWifiLoginString(config.ssid, config.password,
config.hidden);
Bitmap qrCodeBitmap = createQrCode(getResources().getDisplayMetrics(), qrCodeText);
if (qrCodeBitmap == null) {
qrCode.setVisibility(GONE);
} else {
qrCode.setImageBitmap(qrCodeBitmap);
qrCode.setVisibility(VISIBLE);
}
ssidView.setText(getString(R.string.ssid, config.ssid));
passwordView.setText(getString(R.string.password, config.password));
button.setText(R.string.stop_hotspot);
button.setEnabled(true);
hotspotStarted = true;
}
});
viewModel.getStatus().observe(this, status -> statusView.setText(status));
if (SDK_INT >= 29 && (checkSelfPermission(ACCESS_FINE_LOCATION) != PERMISSION_GRANTED)) {
requestPermissions(new String[]{ACCESS_FINE_LOCATION}, 0);
}
}
public void onButtonClick(View view) {
button.setEnabled(false);
if (hotspotStarted) viewModel.stopWifiP2pHotspot();
else viewModel.startWifiP2pHotspot();
}
}
app/src/main/java/org/briarproject/hotspot/MainViewModel.java
View file @ 6a39a620
package org.briarproject.hotspot;
import android.annotation.SuppressLint;
import android.app.Application;
import android.net.wifi.WifiManager;
import android.net.wifi.WifiManager.WifiLock;
import android.net.wifi.p2p.WifiP2pManager;
import android.net.wifi.p2p.WifiP2pManager.ActionListener;
import android.net.wifi.p2p.WifiP2pManager.Channel;
import android.net.wifi.p2p.WifiP2pManager.GroupInfoListener;
import android.os.Handler;
import android.widget.Toast;
import org.briarproject.hotspot.HotspotState.HotspotError;
import org.briarproject.hotspot.HotspotState.HotspotStarted;
import org.briarproject.hotspot.HotspotState.HotspotStopped;
import org.briarproject.hotspot.HotspotState.NetworkConfig;
import org.briarproject.hotspot.HotspotState.StartingHotspot;
import java.util.logging.Logger;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.annotation.UiThread;
import androidx.annotation.WorkerThread;
import androidx.lifecycle.AndroidViewModel;
import androidx.lifecycle.LiveData;
import androidx.lifecycle.MutableLiveData;
import androidx.lifecycle.ViewModel;
import static android.content.Context.WIFI_P2P_SERVICE;
import static android.content.Context.WIFI_SERVICE;
import static android.net.wifi.WifiManager.WIFI_MODE_FULL;
import static android.net.wifi.WifiManager.WIFI_MODE_FULL_HIGH_PERF;
import static android.os.Build.VERSION.SDK_INT;
import static android.widget.Toast.LENGTH_LONG;
import static java.util.logging.Logger.getLogger;
import static org.briarproject.hotspot.HotspotManager.HotspotListener;
import static org.briarproject.hotspot.WebServerManager.WebServerListener;
public class MainViewModel extends ViewModel {
public class MainViewModel extends AndroidViewModel
implements WebServerListener, HotspotListener {
private static final int MAX_GROUP_INFO_ATTEMPTS = 5;
private static final Logger LOG = getLogger(MainViewModel.class.getName());
private final MutableLiveData<NetworkConfig> config = new MutableLiveData<>();
private final MutableLiveData<String> status = new MutableLiveData<>();
private final MutableLiveData<Boolean> is5GhzSupported =
new MutableLiveData<>();
private Application app;
private String lockTag;
private WifiManager wifiManager;
private WifiP2pManager wifiP2pManager;
private Handler handler;
private final HotspotManager hotspotManager;
private final WebServerManager webServerManager;
private WifiLock wifiLock;
private Channel channel;
private final MutableLiveData<HotspotState> status =
new MutableLiveData<>();
void setApplication(Application app) {
this.app = app;
lockTag = app.getString(R.string.app_name);
wifiManager = (WifiManager) app.getSystemService(WIFI_SERVICE);
wifiP2pManager = (WifiP2pManager) app.getSystemService(WIFI_P2P_SERVICE);
handler = new Handler(app.getMainLooper());
}
public MainViewModel(@NonNull Application app) {
super(app);
hotspotManager = new HotspotManager(app, this);
webServerManager = new WebServerManager(app, this);
LiveData<NetworkConfig> getWifiConfiguration() {
return config;
if (SDK_INT >= 21) {
WifiManager wifiManager =
(WifiManager) app.getSystemService(WIFI_SERVICE);
if (wifiManager.is5GHzBandSupported()) {
is5GhzSupported.setValue(true);
}
}
}
LiveData<String> getStatus() {
LiveData<HotspotState> getStatus() {
return status;
}
void startWifiP2pHotspot() {
if (wifiP2pManager == null) {
status.setValue(app.getString(R.string.no_wifi_direct));
return;
}
status.setValue(app.getString(R.string.starting_hotspot));
channel = wifiP2pManager.initialize(app, app.getMainLooper(), null);
if (channel == null) {
status.setValue(app.getString(R.string.no_wifi_direct));
return;
}
acquireLock();
ActionListener listener = new ActionListener() {
@Override
public void onSuccess() {
status.setValue(app.getString(R.string.callback_waiting));
requestGroupInfo(1);
}
LiveData<Boolean> getIs5GhzSupported() {
return is5GhzSupported;
}
@Override
public void onFailure(int reason) {
if (reason == 2) requestGroupInfo(1); // Hotspot already running
else releaseWifiP2pHotspot(app.getString(R.string.callback_failed, reason));
}
};
try {
wifiP2pManager.createGroup(channel, listener);
} catch (SecurityException e) {
releaseWifiP2pHotspot(app.getString(R.string.callback_permission_denied));
}
@UiThread
void startWifiP2pHotspot() {
hotspotManager.startWifiP2pHotspot();
}
private void requestGroupInfo(int attempt) {
GroupInfoListener listener = group -> {
if (group == null) {
// On some devices we need to wait for the group info to become available
if (attempt < MAX_GROUP_INFO_ATTEMPTS) {
handler.postDelayed(() -> requestGroupInfo(attempt + 1), 1000);
} else {
releaseWifiP2pHotspot(app.getString(R.string.callback_no_group_info));
}
} else {
config.setValue(new NetworkConfig(group.getNetworkName(), group.getPassphrase(),
true));
status.setValue(app.getString(R.string.callback_started));
}
};
try {
wifiP2pManager.requestGroupInfo(channel, listener);
} catch (SecurityException e) {
releaseWifiP2pHotspot(app.getString(R.string.callback_permission_denied));
}
@UiThread
void stopWifiP2pHotspot() {
// stop the webserver before the hotspot
// TODO maybe off-load stopping to IoExecutor as it can block
webServerManager.stopWebServer();
hotspotManager.stopWifiP2pHotspot();
}
private void releaseWifiP2pHotspot(String statusMessage) {
if (SDK_INT >= 27) channel.close();
channel = null;
releaseLock();
config.setValue(null);
status.setValue(statusMessage);
@Override
protected void onCleared() {
stopWifiP2pHotspot();
}
void stopWifiP2pHotspot() {
if (channel == null) return;
wifiP2pManager.removeGroup(channel, new ActionListener() {
@Override
public void onStartingHotspot() {
status.setValue(new StartingHotspot());
}
@Override
public void onSuccess() {
releaseWifiP2pHotspot(app.getString(R.string.hotspot_stopped));
}
@Nullable
// Field to temporarily store the network config received via onHotspotStarted()
// in order to post it along with a HotspotStarted status
private volatile NetworkConfig networkConfig;
@Override
public void onFailure(int reason) {
releaseWifiP2pHotspot(app.getString(R.string.hotspot_stopped));
}
});
@Override
public void onHotspotStarted(NetworkConfig networkConfig) {
this.networkConfig = networkConfig;
LOG.info("starting webserver");
// TODO: offload this to the IoExecutor
webServerManager.startWebServer();
}
@Override
protected void onCleared() {
stopWifiP2pHotspot();
public void onDeviceConnected() {
Toast.makeText(getApplication(), R.string.connected_toast, LENGTH_LONG)
.show();
}
@SuppressLint("WakelockTimeout")
private void acquireLock() {
// WIFI_MODE_FULL has no effect on API >= 29
int lockType = SDK_INT >= 29 ? WIFI_MODE_FULL_HIGH_PERF : WIFI_MODE_FULL;
wifiLock = wifiManager.createWifiLock(lockType, lockTag);
wifiLock.acquire();
@Override
public void onHotspotStopped() {
status.setValue(new HotspotStopped());
LOG.info("stopping webserver");
// TODO maybe off-load stopping to IoExecutor as it can block
webServerManager.stopWebServer();
}
private void releaseLock() {
wifiLock.release();
@Override
public void onHotspotError(String error) {
status.setValue(new HotspotError(error));
// TODO maybe off-load stopping to IoExecutor as it can block
webServerManager.stopWebServer();
}
static class NetworkConfig {
final String ssid, password;
final boolean hidden;
@Override
@WorkerThread
public void onWebServerStarted(String url) {
status.postValue(new HotspotStarted(networkConfig, url));
networkConfig = null;
}
NetworkConfig(String ssid, String password, boolean hidden) {
this.ssid = ssid;
this.password = password;
this.hidden = hidden;
}
@Override
@WorkerThread
public void onWebServerError() {
status.postValue(new HotspotError(
getApplication().getString(R.string.web_server_error)));
}
}
app/src/main/java/org/briarproject/hotspot/NetworkUtils.java 0 → 100644
View file @ 6a39a620
package org.briarproject.hotspot;
import java.net.InetAddress;
import java.net.InterfaceAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;
import java.util.List;
import java.util.logging.Logger;
import androidx.annotation.Nullable;
import static java.util.Collections.emptyList;
import static java.util.Collections.list;
import static java.util.logging.Level.WARNING;
import static java.util.logging.Logger.getLogger;
import static org.briarproject.hotspot.LogUtils.logException;
class NetworkUtils {
private final static Logger LOG = getLogger(NetworkUtils.class.getName());
@Nullable
static InetAddress getAccessPointAddress() {
for (NetworkInterface i : getNetworkInterfaces()) {
if (i.getName().startsWith("p2p")) {
for (InterfaceAddress a : i.getInterfaceAddresses()) {
if (a.getAddress().getAddress().length == 4)
return a.getAddress();
}
}
}
return null;
}
static String getNetworkInterfaceSummary() {
StringBuilder sb = new StringBuilder();
for (NetworkInterface i : getNetworkInterfaces()) {
sb.append(i.getName()).append(":");
for (InterfaceAddress a : i.getInterfaceAddresses()) {
if (a.getAddress().getAddress().length <= 4) {
sb.append(" ").append(a.getAddress());
}
}
sb.append("\n");
}
return sb.toString();
}
static List<NetworkInterface> getNetworkInterfaces() {
try {
Enumeration<NetworkInterface> ifaces =
NetworkInterface.getNetworkInterfaces();
return ifaces == null ? emptyList() : list(ifaces);
} catch (SocketException e) {
logException(LOG, WARNING, e);
return emptyList();
}
}
}
app/src/main/java/org/briarproject/hotspot/QrCodeUtils.java
View file @ 6a39a620
......@@ -21,9 +21,10 @@ class QrCodeUtils {
private static String TAG = QrCodeUtils.class.getName();
static String createWifiLoginString(String ssid, String password, boolean hidden) {
static String createWifiLoginString(String ssid, String password) {
// https://en.wikipedia.org/wiki/QR_code#WiFi_network_login
return "WIFI:S:" + ssid + ";P:" + password + ";T:WPA;H:" + hidden;
// do not remove the dangling ';', it can cause problems to omit it
return "WIFI:S:" + ssid + ";T:WPA;P:" + password + ";;";
}
@Nullable
......@@ -32,7 +33,8 @@ class QrCodeUtils {
int largestDimen = max(dm.widthPixels, dm.heightPixels);
int size = min(smallestDimen, largestDimen / 2);
try {
BitMatrix encoded = new QRCodeWriter().encode(input, QR_CODE, size, size);
BitMatrix encoded =
new QRCodeWriter().encode(input, QR_CODE, size, size);
return renderQrCode(encoded);
} catch (WriterException e) {
Log.w(TAG, e);
......
app/src/main/java/org/briarproject/hotspot/ServerFragment.java 0 → 100644
View file @ 6a39a620
package org.briarproject.hotspot;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.ViewModelProvider;
import static android.view.View.GONE;
import static android.view.View.VISIBLE;
import static org.briarproject.hotspot.QrCodeUtils.createQrCode;
public class ServerFragment extends Fragment {
private MainViewModel viewModel;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
setHasOptionsMenu(true);
viewModel = new ViewModelProvider(requireActivity())
.get(MainViewModel.class);
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_server, container, false);
}
@Override
public void onViewCreated(@NonNull View v,
@Nullable Bundle savedInstanceState) {
super.onViewCreated(v, savedInstanceState);
ImageView qrCode = v.findViewById(R.id.qr_code);
TextView urlView = v.findViewById(R.id.url);
viewModel.getStatus().observe(getViewLifecycleOwner(), status -> {
if (status instanceof HotspotState.HotspotStarted) {
HotspotState.HotspotStarted state =
(HotspotState.HotspotStarted) status;
Bitmap qrCodeBitmap = createQrCode(
getResources().getDisplayMetrics(), state.getUrl());
if (qrCodeBitmap == null) {
qrCode.setVisibility(GONE);
} else {
qrCode.setImageBitmap(qrCodeBitmap);
qrCode.setVisibility(VISIBLE);
}
urlView.setText(state.getUrl());
}
});
}
@Override
public void onCreateOptionsMenu(@NonNull Menu menu,
@NonNull MenuInflater inflater) {
inflater.inflate(R.menu.main, menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == R.id.interfaces) {
getParentFragmentManager().beginTransaction()
.replace(R.id.fragment_container, new InterfacesFragment())
.addToBackStack("INTERFACES")
.commit();
return true;
}
return super.onOptionsItemSelected(item);
}
}