Add settings

mobile/build.gradle

@@ -1,6 +1,5 @@
 apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
-apply plugin: 'kotlin-android-extensions'
 apply plugin: 'kotlin-kapt'
 
 android {
@@ -13,7 +12,6 @@ android {
         versionCode 1
         versionName "0.0.1"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
-        vectorDrawables.useSupportLibrary true
     }
     buildTypes {
         debug {
@@ -29,6 +27,8 @@ android {
 }
 
 dependencies {
+    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
+    implementation 'com.android.support:design:27.0.2'
     kapt "com.android.databinding:compiler:$androidPluginVersion"
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation "com.android.support:customtabs:$supportLibraryVersion"

mobile/src/main/AndroidManifest.xml

@@ -21,9 +21,12 @@
             </intent-filter>
         </activity>
 
-        <service
+        <service android:name=".HotspotService">
-            android:name=".HotspotService">
         </service>
+
+        <activity
+            android:name=".SettingsActivity"
+            android:label="@string/title_activity_settings"/>
     </application>
 
 </manifest>

mobile/src/main/java/be/mygod/vpnhotspot/App.kt

@@ -4,12 +4,20 @@ import android.app.Application
 import android.app.NotificationChannel
 import android.app.NotificationManager
 import android.os.Build
+import android.preference.PreferenceManager
 
 class App : Application() {
+    companion object {
+        lateinit var app: App
+    }
+
     override fun onCreate() {
         super.onCreate()
+        app = this
         if (Build.VERSION.SDK_INT >= 26) getSystemService(NotificationManager::class.java)
                 .createNotificationChannel(NotificationChannel(HotspotService.CHANNEL,
                         "Hotspot Service", NotificationManager.IMPORTANCE_LOW))
     }
+
+    val pref by lazy { PreferenceManager.getDefaultSharedPreferences(this) }
 }

mobile/src/main/java/be/mygod/vpnhotspot/HotspotService.kt

@@ -2,22 +2,26 @@ package be.mygod.vpnhotspot
 
 import android.app.PendingIntent
 import android.app.Service
-import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
 import android.net.NetworkInfo
-import android.net.wifi.p2p.*
+import android.net.wifi.p2p.WifiP2pGroup
+import android.net.wifi.p2p.WifiP2pInfo
+import android.net.wifi.p2p.WifiP2pManager
 import android.os.Binder
 import android.os.Looper
 import android.support.v4.app.NotificationCompat
 import android.support.v4.content.ContextCompat
+import android.support.v4.content.LocalBroadcastManager
 import android.util.Log
 import android.widget.Toast
+import be.mygod.vpnhotspot.App.Companion.app
 import java.net.InetAddress
 
 class HotspotService : Service(), WifiP2pManager.ChannelListener {
     companion object {
         const val CHANNEL = "hotspot"
+        const val STATUS_CHANGED = "be.mygod.vpnhotspot.HotspotService.STATUS_CHANGED"
         private const val TAG = "HotspotService"
     }
 
@@ -27,7 +31,6 @@ class HotspotService : Service(), WifiP2pManager.ChannelListener {
 
     inner class HotspotBinder : Binder() {
         val service get() = this@HotspotService
-        val status get() = this@HotspotService.status
         var data: MainActivity.Data? = null
 
         fun shutdown() {
@@ -35,9 +38,9 @@ class HotspotService : Service(), WifiP2pManager.ChannelListener {
                 override fun onSuccess() = clean()
                 override fun onFailure(reason: Int) {
                     if (reason == WifiP2pManager.BUSY) clean() else {   // assuming it's already gone
-                        Toast.makeText(this@HotspotService, "Failed to remove P2P group (reason: $reason)",
+                        Toast.makeText(this@HotspotService, "Failed to remove P2P group (${formatReason(reason)})",
                                 Toast.LENGTH_SHORT).show()
-                        binder.data?.onStatusChanged()
+                        LocalBroadcastManager.getInstance(this@HotspotService).sendBroadcast(Intent(STATUS_CHANGED))
                     }
                 }
             })
@@ -52,43 +55,41 @@ class HotspotService : Service(), WifiP2pManager.ChannelListener {
         private set
     private val binder = HotspotBinder()
     private var receiverRegistered = false
-    private val receiver: BroadcastReceiver = object : BroadcastReceiver() {
+    private val receiver = broadcastReceiver { _, intent ->
-        override fun onReceive(context: Context, intent: Intent) {
+        when (intent.action) {
-            when (intent.action) {
+            WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION ->
-                WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION ->
+                if (intent.getIntExtra(WifiP2pManager.EXTRA_WIFI_STATE, 0) ==
-                    if (intent.getIntExtra(WifiP2pManager.EXTRA_WIFI_STATE, 0) ==
+                        WifiP2pManager.WIFI_P2P_STATE_DISABLED) clean() // group may be enabled by other apps
-                            WifiP2pManager.WIFI_P2P_STATE_DISABLED) clean() // group may be enabled by other apps
+            WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION -> {
-                WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION -> {
+                val info = intent.getParcelableExtra<WifiP2pInfo>(WifiP2pManager.EXTRA_WIFI_P2P_INFO)
-                    val info = intent.getParcelableExtra<WifiP2pInfo>(WifiP2pManager.EXTRA_WIFI_P2P_INFO)
+                val net = intent.getParcelableExtra<NetworkInfo>(WifiP2pManager.EXTRA_NETWORK_INFO)
-                    val net = intent.getParcelableExtra<NetworkInfo>(WifiP2pManager.EXTRA_NETWORK_INFO)
+                val group = intent.getParcelableExtra<WifiP2pGroup>(WifiP2pManager.EXTRA_WIFI_P2P_GROUP)
-                    val group = intent.getParcelableExtra<WifiP2pGroup>(WifiP2pManager.EXTRA_WIFI_P2P_GROUP)
+                hostAddress = info.groupOwnerAddress
-                    hostAddress = info.groupOwnerAddress
+                val downstream = group.`interface`
-                    val downstream = group.`interface`
+                if (net.isConnected && downstream != null && this@HotspotService.downstream == null) {
-                    if (net.isConnected && downstream != null && this@HotspotService.downstream == null) {
+                    this@HotspotService.downstream = downstream
-                        this@HotspotService.downstream = downstream
+                    if (noisySu("echo 1 >/proc/sys/net/ipv4/ip_forward",
-                        if (noisySu("echo 1 >/proc/sys/net/ipv4/ip_forward",
+                            "ip route add default dev $upstream scope link table 62",
-                                "ip route add default dev $upstream scope link table 62",
+                            "ip route add $route dev $downstream scope link table 62",
-                                "ip route add $route dev $downstream scope link table 62",
+                            "ip route add broadcast 255.255.255.255 dev $downstream scope link table 62",
-                                "ip route add broadcast 255.255.255.255 dev $downstream scope link table 62",
+                            "ip rule add from $route lookup 62",
-                                "ip rule add from $route lookup 62",
+                            "iptables -N vpnhotspot_fwd",
-                                "iptables -N vpnhotspot_fwd",
+                            "iptables -A vpnhotspot_fwd -i $upstream -o $downstream -m state --state ESTABLISHED,RELATED -j ACCEPT",
-                                "iptables -A vpnhotspot_fwd -i $upstream -o $downstream -m state --state ESTABLISHED,RELATED -j ACCEPT",
+                            "iptables -A vpnhotspot_fwd -i $downstream -o $upstream -j ACCEPT",
-                                "iptables -A vpnhotspot_fwd -i $downstream -o $upstream -j ACCEPT",
+                            "iptables -I FORWARD -j vpnhotspot_fwd",
-                                "iptables -I FORWARD -j vpnhotspot_fwd",
+                            "iptables -t nat -A PREROUTING -i $downstream -p tcp --dport 53 -j DNAT --to-destination $dns",
-                                "iptables -t nat -A PREROUTING -i $downstream -p tcp --dport 53 -j DNAT --to-destination $dns",
+                            "iptables -t nat -A PREROUTING -i $downstream -p udp --dport 53 -j DNAT --to-destination $dns")) {
-                                "iptables -t nat -A PREROUTING -i $downstream -p udp --dport 53 -j DNAT --to-destination $dns")) {
+                        doStart(group)
-                            doStart(group)
+                    } else startFailure("Something went wrong, please check logcat.")
-                        } else startFailure("Something went wrong, please check logcat.")
-                    }
-                    this@HotspotService.group = group
-                    binder.data?.onGroupChanged()
-                    showNotification(group)
-                    Log.d(TAG, "${intent.action}: $info, $net, $group")
-                }
-                WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION -> {
-                    val info = intent.getParcelableExtra<WifiP2pInfo>(WifiP2pManager.EXTRA_WIFI_P2P_INFO)
-                    Log.d(TAG, "${intent.action}: $info")
                 }
+                this@HotspotService.group = group
+                binder.data?.onGroupChanged()
+                showNotification(group)
+                Log.d(TAG, "${intent.action}: $info, $net, $group")
+            }
+            WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION -> {
+                val info = intent.getParcelableExtra<WifiP2pInfo>(WifiP2pManager.EXTRA_WIFI_P2P_INFO)
+                Log.d(TAG, "${intent.action}: $info")
             }
         }
     }
@@ -96,16 +97,25 @@ class HotspotService : Service(), WifiP2pManager.ChannelListener {
     // TODO: do something to these hardcoded strings
     var downstream: String? = null
         private set
-    private val upstream = "tun0"
+    private val upstream get() = app.pref.getString("service.upstream", "tun0")
-    private val route = "192.168.49.0/24"
+    private val route get() = app.pref.getString("service.route", "192.168.49.0/24")
-    private val dns = "8.8.8.8:53"
+    private val dns get() = app.pref.getString("service.dns", "8.8.8.8:53")
 
     var status = Status.IDLE
         private set(value) {
+            if (field == value) return
             field = value
-            binder.data?.onStatusChanged()
+            LocalBroadcastManager.getInstance(this).sendBroadcast(Intent(STATUS_CHANGED))
         }
 
+    private fun formatReason(reason: Int) = when (reason) {
+        WifiP2pManager.ERROR -> "ERROR"
+        WifiP2pManager.P2P_UNSUPPORTED -> "P2P_UNSUPPORTED"
+        WifiP2pManager.BUSY -> "BUSY"
+        WifiP2pManager.NO_SERVICE_REQUESTS -> "NO_SERVICE_REQUESTS"
+        else -> "unknown reason: $reason"
+    }
+
     override fun onBind(intent: Intent) = binder
 
     override fun onCreate() {
@@ -122,7 +132,7 @@ class HotspotService : Service(), WifiP2pManager.ChannelListener {
         if (status != Status.IDLE) return START_NOT_STICKY
         status = Status.STARTING
         if (!receiverRegistered) {
-            registerReceiver(receiver, createIntentFilter(
+            registerReceiver(receiver, intentFilter(
                     WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION,
                     WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION,
                     WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION))
@@ -137,8 +147,9 @@ class HotspotService : Service(), WifiP2pManager.ChannelListener {
                     p2pManager.removeGroup(channel, object : WifiP2pManager.ActionListener {
                         override fun onSuccess() = doStart()
                         override fun onFailure(reason: Int) {
-                            Toast.makeText(this@HotspotService, "Failed to remove old P2P group (reason: $reason)",
+                            Toast.makeText(this@HotspotService,
-                                    Toast.LENGTH_SHORT).show()
+                                    "Failed to remove old P2P group (${formatReason(reason)})", Toast.LENGTH_SHORT)
+                                    .show()
                         }
                     })
                 }
@@ -153,7 +164,7 @@ class HotspotService : Service(), WifiP2pManager.ChannelListener {
         clean()
     }
     private fun doStart() = p2pManager.createGroup(channel, object : WifiP2pManager.ActionListener {
-        override fun onFailure(reason: Int) = startFailure("Failed to create P2P group (reason: $reason)")
+        override fun onFailure(reason: Int) = startFailure("Failed to create P2P group (${formatReason(reason)})")
         override fun onSuccess() { }    // wait for WIFI_P2P_CONNECTION_CHANGED_ACTION to fire
     })
     private fun doStart(group: WifiP2pGroup) {

mobile/src/main/java/be/mygod/vpnhotspot/MainActivity.kt

@@ -1,9 +1,6 @@
 package be.mygod.vpnhotspot
 
-import android.content.ComponentName
+import android.content.*
-import android.content.Context
-import android.content.Intent
-import android.content.ServiceConnection
 import android.databinding.BaseObservable
 import android.databinding.Bindable
 import android.databinding.DataBindingUtil
@@ -11,32 +8,35 @@ import android.net.wifi.p2p.WifiP2pDevice
 import android.os.Bundle
 import android.os.IBinder
 import android.support.v4.content.ContextCompat
+import android.support.v4.content.LocalBroadcastManager
 import android.support.v7.app.AppCompatActivity
 import android.support.v7.widget.DefaultItemAnimator
 import android.support.v7.widget.LinearLayoutManager
 import android.support.v7.widget.RecyclerView
+import android.support.v7.widget.Toolbar
 import android.view.LayoutInflater
+import android.view.MenuItem
 import android.view.ViewGroup
-import be.mygod.vpnhotspot.databinding.ClientBinding
+import be.mygod.vpnhotspot.databinding.ActivityMainBinding
-import be.mygod.vpnhotspot.databinding.MainActivityBinding
+import be.mygod.vpnhotspot.databinding.ListitemClientBinding
 
-class MainActivity : AppCompatActivity(), ServiceConnection {
+class MainActivity : AppCompatActivity(), ServiceConnection, Toolbar.OnMenuItemClickListener {
     inner class Data : BaseObservable() {
         val switchEnabled: Boolean
-            @Bindable get() = when (binder?.status) {
+            @Bindable get() = when (binder?.service?.status) {
                 HotspotService.Status.IDLE -> true
                 HotspotService.Status.ACTIVE -> true
                 else -> false
             }
         var serviceStarted: Boolean
-            @Bindable get() = when (binder?.status) {
+            @Bindable get() = when (binder?.service?.status) {
                 HotspotService.Status.STARTING -> true
                 HotspotService.Status.ACTIVE -> true
                 else -> false
             }
             set(value) {
                 val binder = binder
-                when (binder?.status) {
+                when (binder?.service?.status) {
                     HotspotService.Status.IDLE ->
                         if (value) ContextCompat.startForegroundService(this@MainActivity,
                                 Intent(this@MainActivity, HotspotService::class.java))
@@ -44,7 +44,7 @@ class MainActivity : AppCompatActivity(), ServiceConnection {
                 }
             }
 
-        val running get() = binder?.status == HotspotService.Status.ACTIVE
+        val running get() = binder?.service?.status == HotspotService.Status.ACTIVE
         val ssid: String @Bindable get() = if (running) binder!!.service.group.networkName else ""
         val password: String @Bindable get() = if (running) binder!!.service.group.passphrase else ""
 
@@ -58,17 +58,19 @@ class MainActivity : AppCompatActivity(), ServiceConnection {
             notifyPropertyChanged(BR.password)
             adapter.fetchClients()
         }
+
+        val statusListener = broadcastReceiver { _, _ -> onStatusChanged() }
     }
 
-    class ClientViewHolder(val binding: ClientBinding) : RecyclerView.ViewHolder(binding.root)
+    class ClientViewHolder(val binding: ListitemClientBinding) : RecyclerView.ViewHolder(binding.root)
     inner class ClientAdapter : RecyclerView.Adapter<ClientViewHolder>() {
         private var owner: WifiP2pDevice? = null
         private lateinit var clients: MutableCollection<WifiP2pDevice>
         private lateinit var arpCache: ArpCache
 
         fun fetchClients() {
-            val binder = binder!!
             if (data.running) {
+                val binder = binder!!
                 owner = binder.service.group.owner
                 clients = binder.service.group.clientList
                 arpCache = ArpCache(binder.service.downstream)
@@ -77,7 +79,7 @@ class MainActivity : AppCompatActivity(), ServiceConnection {
         }
 
         override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) =
-                ClientViewHolder(ClientBinding.inflate(LayoutInflater.from(parent.context)))
+                ClientViewHolder(ListitemClientBinding.inflate(LayoutInflater.from(parent.context)))
 
         override fun onBindViewHolder(holder: ClientViewHolder, position: Int) {
             val device = when (position) {
@@ -95,20 +97,30 @@ class MainActivity : AppCompatActivity(), ServiceConnection {
         override fun getItemCount() = if (owner == null) 0 else 1 + clients.size
     }
 
-    private lateinit var binding: MainActivityBinding
+    private lateinit var binding: ActivityMainBinding
     private val data = Data()
     private val adapter = ClientAdapter()
     private var binder: HotspotService.HotspotBinder? = null
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        binding = DataBindingUtil.setContentView(this, R.layout.main_activity)
+        binding = DataBindingUtil.setContentView(this, R.layout.activity_main)
         binding.data = data
         binding.clients.layoutManager = LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false)
         val animator = DefaultItemAnimator()
         animator.supportsChangeAnimations = false   // prevent fading-in/out when rebinding
         binding.clients.itemAnimator = animator
         binding.clients.adapter = adapter
+        binding.toolbar.inflateMenu(R.menu.main)
+        binding.toolbar.setOnMenuItemClickListener(this)
+    }
+
+    override fun onMenuItemClick(item: MenuItem): Boolean = when (item.itemId) {
+        R.id.settings -> {
+            startActivity(Intent(this, SettingsActivity::class.java))
+            true
+        }
+        else -> false
     }
 
     override fun onStart() {
@@ -117,6 +129,7 @@ class MainActivity : AppCompatActivity(), ServiceConnection {
     }
 
     override fun onStop() {
+        onServiceDisconnected(null)
         unbindService(this)
         super.onStop()
     }
@@ -126,11 +139,14 @@ class MainActivity : AppCompatActivity(), ServiceConnection {
         binder.data = data
         this.binder = binder
         data.onStatusChanged()
+        LocalBroadcastManager.getInstance(this)
+                .registerReceiver(data.statusListener, intentFilter(HotspotService.STATUS_CHANGED))
     }
 
     override fun onServiceDisconnected(name: ComponentName?) {
         binder?.data = null
         binder = null
+        LocalBroadcastManager.getInstance(this).unregisterReceiver(data.statusListener)
         data.onStatusChanged()
     }
 }

mobile/src/main/java/be/mygod/vpnhotspot/SettingsActivity.kt

@@ -0,0 +1,14 @@
+package be.mygod.vpnhotspot
+
+import android.databinding.DataBindingUtil
+import android.os.Bundle
+import android.support.v7.app.AppCompatActivity
+import be.mygod.vpnhotspot.databinding.ActivitySettingsBinding
+
+class SettingsActivity : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        DataBindingUtil.setContentView<ActivitySettingsBinding>(this, R.layout.activity_settings)
+                .toolbar.setNavigationOnClickListener({ finish() })
+    }
+}

mobile/src/main/java/be/mygod/vpnhotspot/SettingsFragment.kt

@@ -0,0 +1,82 @@
+package be.mygod.vpnhotspot
+
+import android.content.ComponentName
+import android.content.Context
+import android.content.Intent
+import android.content.ServiceConnection
+import android.net.Uri
+import android.os.Bundle
+import android.os.IBinder
+import android.support.customtabs.CustomTabsIntent
+import android.support.v4.content.ContextCompat
+import android.support.v4.content.LocalBroadcastManager
+import android.support.v7.preference.Preference
+import com.takisoft.fix.support.v7.preference.PreferenceFragmentCompatDividers
+
+class SettingsFragment : PreferenceFragmentCompatDividers(), ServiceConnection {
+    private lateinit var service: Preference
+    private var binder: HotspotService.HotspotBinder? = null
+    private val statusListener = broadcastReceiver { _, _ -> onStatusChanged() }
+    private val customTabsIntent by lazy {
+        CustomTabsIntent.Builder().setToolbarColor(ContextCompat.getColor(activity!!, R.color.colorPrimary)).build()
+    }
+
+    override fun onCreatePreferencesFix(savedInstanceState: Bundle?, rootKey: String?) {
+        addPreferencesFromResource(R.xml.pref_settings)
+        service = findPreference("service")
+        findPreference("service.clean").setOnPreferenceClickListener {
+            noisySu("iptables -t nat -F PREROUTING",
+                    "while iptables -D FORWARD -j vpnhotspot_fwd; do done",
+                    "iptables -F vpnhotspot_fwd",
+                    "iptables -X vpnhotspot_fwd",
+                    "ip rule del lookup 62",
+                    "ip route flush table 62")
+            true
+        }
+        findPreference("misc.logcat").setOnPreferenceClickListener {
+            val intent = Intent(Intent.ACTION_SEND)
+                    .setType("text/plain")
+                    .putExtra(Intent.EXTRA_TEXT, Runtime.getRuntime().exec(arrayOf("logcat", "-d"))
+                            .inputStream.bufferedReader().use { it.readText() })
+            startActivity(Intent.createChooser(intent, getString(R.string.abc_shareactionprovider_share_with)))
+            true
+        }
+        findPreference("misc.source").setOnPreferenceClickListener {
+            customTabsIntent.launchUrl(activity, Uri.parse("https://github.com/Mygod/VPNHotspot"))
+            true
+        }
+        findPreference("misc.donate").setOnPreferenceClickListener {
+            customTabsIntent.launchUrl(activity, Uri.parse("https://mygod.be/donate/"))
+            true
+        }
+    }
+
+    override fun onStart() {
+        super.onStart()
+        val activity = activity!!
+        activity.bindService(Intent(activity, HotspotService::class.java), this, Context.BIND_AUTO_CREATE)
+    }
+
+    override fun onStop() {
+        onServiceDisconnected(null)
+        activity!!.unbindService(this)
+        super.onStop()
+    }
+
+    override fun onServiceConnected(name: ComponentName?, service: IBinder?) {
+        binder = service as HotspotService.HotspotBinder
+        onStatusChanged()
+        LocalBroadcastManager.getInstance(activity!!)
+                .registerReceiver(statusListener, intentFilter(HotspotService.STATUS_CHANGED))
+    }
+
+    override fun onServiceDisconnected(name: ComponentName?) {
+        LocalBroadcastManager.getInstance(activity!!).unregisterReceiver(statusListener)
+        binder = null
+        service.isEnabled = false
+    }
+
+    private fun onStatusChanged() {
+        service.isEnabled = binder!!.service.status == HotspotService.Status.IDLE
+    }
+}

mobile/src/main/java/be/mygod/vpnhotspot/Utils.kt

@@ -1,9 +1,16 @@
 package be.mygod.vpnhotspot
 
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
 import android.content.IntentFilter
 import android.util.Log
 
-fun createIntentFilter(vararg actions: String): IntentFilter {
+fun broadcastReceiver(receiver: (Context, Intent) -> Unit) = object : BroadcastReceiver() {
+    override fun onReceive(context: Context, intent: Intent) = receiver(context, intent)
+}
+
+fun intentFilter(vararg actions: String): IntentFilter {
     val result = IntentFilter()
     actions.forEach { result.addAction(it) }
     return result

mobile/src/main/res/drawable/ic_action_settings.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#fff"
+        android:pathData="M19.43,12.98c0.04,-0.32 0.07,-0.64 0.07,-0.98s-0.03,-0.66 -0.07,-0.98l2.11,-1.65c0.19,-0.15 0.24,-0.42 0.12,-0.64l-2,-3.46c-0.12,-0.22 -0.39,-0.3 -0.61,-0.22l-2.49,1c-0.52,-0.4 -1.08,-0.73 -1.69,-0.98l-0.38,-2.65C14.46,2.18 14.25,2 14,2h-4c-0.25,0 -0.46,0.18 -0.49,0.42l-0.38,2.65c-0.61,0.25 -1.17,0.59 -1.69,0.98l-2.49,-1c-0.23,-0.09 -0.49,0 -0.61,0.22l-2,3.46c-0.13,0.22 -0.07,0.49 0.12,0.64l2.11,1.65c-0.04,0.32 -0.07,0.65 -0.07,0.98s0.03,0.66 0.07,0.98l-2.11,1.65c-0.19,0.15 -0.24,0.42 -0.12,0.64l2,3.46c0.12,0.22 0.39,0.3 0.61,0.22l2.49,-1c0.52,0.4 1.08,0.73 1.69,0.98l0.38,2.65c0.03,0.24 0.24,0.42 0.49,0.42h4c0.25,0 0.46,-0.18 0.49,-0.42l0.38,-2.65c0.61,-0.25 1.17,-0.59 1.69,-0.98l2.49,1c0.23,0.09 0.49,0 0.61,-0.22l2,-3.46c0.12,-0.22 0.07,-0.49 -0.12,-0.64l-2.11,-1.65zM12,15.5c-1.93,0 -3.5,-1.57 -3.5,-3.5s1.57,-3.5 3.5,-3.5 3.5,1.57 3.5,3.5 -1.57,3.5 -3.5,3.5z"/>
+</vector>

mobile/src/main/res/drawable/ic_navigation_close.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#fff"
+        android:pathData="M19,6.41L17.59,5 12,10.59 6.41,5 5,6.41 10.59,12 5,17.59 6.41,19 12,13.41 17.59,19 19,17.59 13.41,12z"/>
+</vector>

mobile/src/main/res/layout/activity_main.xml

@@ -58,6 +58,7 @@
                 android:layout_column="2"
                 android:layout_row="0"
                 android:text="@{data.ssid}"
+                android:textIsSelectable="true"
                 tools:text="DIRECT-rAnd0m"/>
 
             <TextView
@@ -74,6 +75,7 @@
                 android:layout_column="2"
                 android:layout_row="1"
                 android:text="@{data.password}"
+                android:textIsSelectable="true"
                 tools:text="p4ssW0rd"/>
         </GridLayout>
 
@@ -101,6 +103,6 @@
             android:paddingTop="8dp"
             android:clipToPadding="false"
             android:scrollbars="vertical"
-            tools:listitem="@layout/client"/>
+            tools:listitem="@layout/listitem_client"/>
     </LinearLayout>
 </layout>

mobile/src/main/res/layout/activity_settings.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+    <LinearLayout
+        android:orientation="vertical"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+        <android.support.v7.widget.Toolbar
+            android:layout_height="?attr/actionBarSize"
+            android:layout_width="match_parent"
+            android:background="?attr/colorPrimary"
+            android:elevation="4dp"
+            app:title="@string/title_activity_settings"
+            app:navigationIcon="@drawable/ic_navigation_close"
+            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
+            app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
+            android:id="@+id/toolbar"/>
+        <fragment
+            class="be.mygod.vpnhotspot.SettingsFragment"
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            android:layout_weight="1"
+            android:id="@+id/preference"/>
+    </LinearLayout>
+</layout>

mobile/src/main/res/layout/listitem_client.xml

@@ -21,6 +21,7 @@
             android:layout_height="wrap_content"
             android:text="@{device.deviceAddress}"
             android:textAppearance="@style/TextAppearance.AppCompat.Subhead"
+            android:textIsSelectable="true"
             tools:text="xx:xx:xx:xx:xx:xx"/>
 
         <TextView
@@ -28,6 +29,7 @@
             android:layout_height="wrap_content"
             android:visibility="@{ipAddress == null ? View.GONE : View.VISIBLE}"
             android:text="@{ipAddress}"
+            android:textIsSelectable="true"
             tools:text="192.168.49.123"/>
     </LinearLayout>
 </layout>

mobile/src/main/res/menu/main.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+      xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item
+        android:id="@+id/settings"
+        android:icon="@drawable/ic_action_settings"
+        android:title="@string/title_activity_settings"
+        app:showAsAction="always"/>
+</menu>

mobile/src/main/res/values/strings.xml

@@ -1,3 +1,4 @@
 <resources>
     <string name="app_name">VPN Hotspot</string>
+    <string name="title_activity_settings">Settings</string>
 </resources>

mobile/src/main/res/values/styles.xml

@@ -1,8 +1,6 @@
 <resources>
 
-    <!-- Base application theme. -->
+    <style name="AppTheme" parent="PreferenceFixTheme.Light.NoActionBar">
-    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
-        <!-- Customize your theme here. -->
         <item name="colorPrimary">@color/colorPrimary</item>
         <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
         <item name="colorAccent">@color/colorAccent</item>

mobile/src/main/res/xml/pref_settings.xml

@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="utf-8"?>
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
+    <PreferenceCategory
+        android:key="service"
+        android:title="Service">
+        <AutoSummaryEditTextPreference
+            android:key="service.upstream"
+            android:title="Upstream interface"
+            android:summary="%s"
+            android:defaultValue="tun0"/>
+        <AutoSummaryEditTextPreference
+            android:key="service.route"
+            android:title="Wi-Fi Direct routing"
+            android:summary="%s"
+            android:defaultValue="192.168.49.0/24"/>
+        <AutoSummaryEditTextPreference
+            android:key="service.dns"
+            android:title="Downstream DNS server:port"
+            android:summary="%s"
+            android:defaultValue="8.8.8.8:53"/>
+        <Preference
+            android:key="service.clean"
+            android:title="Clean up"
+            android:summary="Remove routing rules"/>
+    </PreferenceCategory>
+    <PreferenceCategory
+        android:title="Misc">
+        <Preference
+            android:key="misc.logcat"
+            android:title="Export logcat"
+            android:summary="Such useful very wow"/>
+        <Preference
+            android:key="misc.source"
+            android:title="View on GitHub"
+            android:summary="Star, submit issues and contribute"/>
+        <Preference
+            android:key="misc.donate"
+            android:title="Donate"
+            android:summary="I love money"/>
+    </PreferenceCategory>
+</PreferenceScreen>