first commit

2026-06-01 18:03:26 +08:00
commit 291d557000
39 changed files with 1158 additions and 0 deletions
@@ -0,0 +1 @@
+/build
@@ -0,0 +1,39 @@
+plugins {
+    alias(libs.plugins.android.application)
+}
+
+android {
+    namespace 'com.kimgo.posefit'
+    compileSdk 34
+
+    defaultConfig {
+        applicationId "com.kimgo.posefit"
+        minSdk 29
+        targetSdk 34
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_11
+        targetCompatibility JavaVersion.VERSION_11
+    }
+}
+
+dependencies {
+    implementation libs.appcompat
+    implementation libs.material
+    testImplementation libs.junit
+    androidTestImplementation libs.espresso.core
+    androidTestImplementation libs.ext.junit
+    implementation "io.getstream:stream-webrtc-android:1.3.10"
+    implementation "com.squareup.okhttp3:okhttp:4.12.0"
+}
@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
@@ -0,0 +1,26 @@
+package com.kimgo.posefit;
+
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+        assertEquals("com.kimgo.posefit", appContext.getPackageName());
+    }
+}
@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.kimgo.posefit">
+
+    <!-- 摄像头权限 -->
+    <uses-permission android:name="android.permission.CAMERA" />
+
+    <!-- 网络权限：WebRTC / WebSocket / 信令服务器需要 -->
+    <uses-permission android:name="android.permission.INTERNET" />
+
+    <!-- 可选：检查网络状态 -->
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+
+
+    <uses-permission android:name="android.permission.RECORD_AUDIO" />
+
+    <!-- 声明需要摄像头硬件 -->
+    <uses-feature
+        android:name="android.hardware.camera"
+        android:required="true" />
+
+    <application
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Posefit">
+
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:label="@string/app_name">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+    </application>
+
+</manifest>
@@ -0,0 +1,41 @@
+package com.kimgo.posefit
+
+import android.Manifest
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.result.contract.ActivityResultContracts
+import com.kimgo.posefit.sender.WebRtcSenderClient
+
+class MainActivity : ComponentActivity() {
+
+    private lateinit var webRtcClient: WebRtcSenderClient
+
+    private val requestPermission =
+        registerForActivityResult(ActivityResultContracts.RequestPermission()) { granted ->
+            if (granted) {
+                startWebRtc()
+            }
+        }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        requestPermission.launch(Manifest.permission.CAMERA)
+    }
+
+    private fun startWebRtc() {
+        webRtcClient = WebRtcSenderClient(
+            context = this,
+            signalingUrl = "ws://192.168.110.240:8080"
+        )
+
+        webRtcClient.start()
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        if (::webRtcClient.isInitialized) {
+            webRtcClient.release()
+        }
+    }
+}
@@ -0,0 +1,12 @@
+package com.kimgo.posefit.sender
+
+import org.webrtc.SdpObserver
+import org.webrtc.SessionDescription
+
+
+open class SimpleSdpObserver : SdpObserver {
+    override fun onCreateSuccess(desc: SessionDescription) {}
+    override fun onSetSuccess() {}
+    override fun onCreateFailure(error: String) {}
+    override fun onSetFailure(error: String) {}
+}
@@ -0,0 +1,223 @@
+package com.kimgo.posefit.sender
+
+import android.content.Context
+import okhttp3.*
+import org.json.JSONObject
+import org.webrtc.*
+
+class WebRtcSenderClient(
+    private val context: Context,
+    private val signalingUrl: String
+) {
+
+    private val eglBase = EglBase.create()
+    private val okHttpClient = OkHttpClient()
+
+    private lateinit var webSocket: WebSocket
+    private lateinit var factory: PeerConnectionFactory
+    private var peerConnection: PeerConnection? = null
+
+    private var videoCapturer: CameraVideoCapturer? = null
+    private var videoSource: VideoSource? = null
+    private var videoTrack: VideoTrack? = null
+    private var surfaceTextureHelper: SurfaceTextureHelper? = null
+
+    fun start() {
+        initPeerConnectionFactory()
+        connectSignaling()
+    }
+
+    private fun initPeerConnectionFactory() {
+        PeerConnectionFactory.initialize(
+            PeerConnectionFactory.InitializationOptions.builder(context)
+                .createInitializationOptions()
+        )
+
+        val encoderFactory = DefaultVideoEncoderFactory(
+            eglBase.eglBaseContext,
+            true,
+            true
+        )
+
+        val decoderFactory = DefaultVideoDecoderFactory(
+            eglBase.eglBaseContext
+        )
+
+        factory = PeerConnectionFactory.builder()
+            .setVideoEncoderFactory(encoderFactory)
+            .setVideoDecoderFactory(decoderFactory)
+            .createPeerConnectionFactory()
+    }
+
+    private fun connectSignaling() {
+        val request = Request.Builder()
+            .url(signalingUrl)
+            .build()
+
+        webSocket = okHttpClient.newWebSocket(request, object : WebSocketListener() {
+
+            override fun onOpen(webSocket: WebSocket, response: Response) {
+                createPeerConnection()
+                startCamera()
+                createOffer()
+            }
+
+            override fun onMessage(webSocket: WebSocket, text: String) {
+                handleSignalingMessage(text)
+            }
+        })
+    }
+
+    private fun createPeerConnection() {
+        val iceServers = listOf(
+            PeerConnection.IceServer.builder("stun:stun.l.google.com:19302")
+                .createIceServer()
+        )
+
+        val rtcConfig = PeerConnection.RTCConfiguration(iceServers).apply {
+            sdpSemantics = PeerConnection.SdpSemantics.UNIFIED_PLAN
+        }
+
+        peerConnection = factory.createPeerConnection(
+            rtcConfig,
+            object : PeerConnection.Observer {
+
+                override fun onIceCandidate(candidate: IceCandidate) {
+                    val json = JSONObject().apply {
+                        put("type", "candidate")
+                        put("sdpMid", candidate.sdpMid)
+                        put("sdpMLineIndex", candidate.sdpMLineIndex)
+                        put("candidate", candidate.sdp)
+                    }
+
+                    webSocket.send(json.toString())
+                }
+
+                override fun onSignalingChange(state: PeerConnection.SignalingState) {}
+                override fun onIceConnectionChange(state: PeerConnection.IceConnectionState) {}
+                override fun onIceConnectionReceivingChange(receiving: Boolean) {}
+                override fun onIceGatheringChange(state: PeerConnection.IceGatheringState) {}
+                override fun onIceCandidatesRemoved(candidates: Array<out IceCandidate>) {}
+                override fun onAddStream(stream: MediaStream) {}
+                override fun onRemoveStream(stream: MediaStream) {}
+                override fun onDataChannel(channel: DataChannel) {}
+                override fun onRenegotiationNeeded() {}
+                override fun onAddTrack(receiver: RtpReceiver, streams: Array<out MediaStream>) {}
+            }
+        )
+    }
+
+    private fun startCamera() {
+        val enumerator = Camera2Enumerator(context)
+
+        val cameraName = enumerator.deviceNames.firstOrNull {
+            enumerator.isFrontFacing(it)
+        } ?: enumerator.deviceNames.first()
+
+        videoCapturer = enumerator.createCapturer(cameraName, null)
+
+        surfaceTextureHelper = SurfaceTextureHelper.create(
+            "CameraThread",
+            eglBase.eglBaseContext
+        )
+
+        videoSource = factory.createVideoSource(false)
+
+        videoCapturer?.initialize(
+            surfaceTextureHelper,
+            context,
+            videoSource?.capturerObserver
+        )
+
+        videoCapturer?.startCapture(1280, 720, 30)
+
+        videoTrack = factory.createVideoTrack("video_track", videoSource)
+
+        peerConnection?.addTrack(
+            videoTrack,
+            listOf("posefit_stream")
+        )
+    }
+
+    private fun createOffer() {
+        val constraints = MediaConstraints().apply {
+            mandatory.add(
+                MediaConstraints.KeyValuePair("OfferToReceiveVideo", "false")
+            )
+            mandatory.add(
+                MediaConstraints.KeyValuePair("OfferToReceiveAudio", "false")
+            )
+        }
+
+        peerConnection?.createOffer(object : SdpObserver {
+
+            override fun onCreateSuccess(desc: SessionDescription) {
+                peerConnection?.setLocalDescription(object : SdpObserver {
+                    override fun onSetSuccess() {
+                        val json = JSONObject().apply {
+                            put("type", desc.type.canonicalForm())
+                            put("sdp", desc.description)
+                        }
+
+                        webSocket.send(json.toString())
+                    }
+
+                    override fun onSetFailure(error: String) {}
+                    override fun onCreateSuccess(desc: SessionDescription) {}
+                    override fun onCreateFailure(error: String) {}
+                }, desc)
+            }
+
+            override fun onSetSuccess() {}
+            override fun onCreateFailure(error: String) {}
+            override fun onSetFailure(error: String) {}
+
+        }, constraints)
+    }
+
+    private fun handleSignalingMessage(text: String) {
+        val json = JSONObject(text)
+
+        when (json.getString("type")) {
+            "answer" -> {
+                val sdp = SessionDescription(
+                    SessionDescription.Type.ANSWER,
+                    json.getString("sdp")
+                )
+
+                peerConnection?.setRemoteDescription(
+                    SimpleSdpObserver(),
+                    sdp
+                )
+            }
+
+            "candidate" -> {
+                val candidate = IceCandidate(
+                    json.getString("sdpMid"),
+                    json.getInt("sdpMLineIndex"),
+                    json.getString("candidate")
+                )
+
+                peerConnection?.addIceCandidate(candidate)
+            }
+        }
+    }
+
+    fun release() {
+        try {
+            videoCapturer?.stopCapture()
+        } catch (_: Exception) {
+        }
+
+        videoCapturer?.dispose()
+        videoSource?.dispose()
+        videoTrack?.dispose()
+        surfaceTextureHelper?.dispose()
+        peerConnection?.close()
+        peerConnection?.dispose()
+        factory.dispose()
+        eglBase.release()
+        webSocket.close(1000, "close")
+        okHttpClient.dispatcher.executorService.shutdown()
+    }
+}
@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#3DDC84"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
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+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
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+        android:strokeWidth="0.8"
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+    <path
+        android:fillColor="#00000000"
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+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
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+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
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+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
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+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
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+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
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+        android:fillColor="#00000000"
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+        android:fillColor="#00000000"
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+    <path
+        android:fillColor="#00000000"
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+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
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+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
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+        android:strokeWidth="0.8"
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+    <path
+        android:fillColor="#00000000"
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+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
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+    <path
+        android:fillColor="#00000000"
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+    <path
+        android:fillColor="#00000000"
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+    <path
+        android:fillColor="#00000000"
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+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+</vector>
@@ -0,0 +1,30 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
@@ -0,0 +1,16 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.Posefit" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_200</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/black</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_200</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+</resources>
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="purple_200">#FFBB86FC</color>
+    <color name="purple_500">#FF6200EE</color>
+    <color name="purple_700">#FF3700B3</color>
+    <color name="teal_200">#FF03DAC5</color>
+    <color name="teal_700">#FF018786</color>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
+</resources>
@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">posefit</string>
+</resources>
@@ -0,0 +1,16 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.Posefit" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_500</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/white</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_700</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+</resources>
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+   Sample backup rules file; uncomment and customize as necessary.
+   See https://developer.android.com/guide/topics/data/autobackup
+   for details.
+   Note: This file is ignored for devices older than API 31
+   See https://developer.android.com/about/versions/12/backup-restore
+-->
+<full-backup-content>
+    <!--
+   <include domain="sharedpref" path="."/>
+   <exclude domain="sharedpref" path="device.xml"/>
+-->
+</full-backup-content>
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+   Sample data extraction rules file; uncomment and customize as necessary.
+   See https://developer.android.com/about/versions/12/backup-restore#xml-changes
+   for details.
+-->
+<data-extraction-rules>
+    <cloud-backup>
+        <!-- TODO: Use <include> and <exclude> to control what is backed up.
+        <include .../>
+        <exclude .../>
+        -->
+    </cloud-backup>
+    <!--
+    <device-transfer>
+        <include .../>
+        <exclude .../>
+    </device-transfer>
+    -->
+</data-extraction-rules>
@@ -0,0 +1,17 @@
+package com.kimgo.posefit;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+public class ExampleUnitTest {
+    @Test
+    public void addition_isCorrect() {
+        assertEquals(4, 2 + 2);
+    }
+}