diff --git a/background/build.gradle.kts b/background/build.gradle.kts
index 06240ee..c381938 100644
--- a/background/build.gradle.kts
+++ b/background/build.gradle.kts
@@ -20,12 +20,21 @@ android {
     }
 
     buildTypes {
+        val appName = "${rootProject.extra["background_app_name"]}"
+        debug {
+            manifestPlaceholders.apply {
+                this["background_app_name"] = appName
+            }
+        }
         release {
             isMinifyEnabled = false
             proguardFiles(
                 getDefaultProguardFile("proguard-android-optimize.txt"),
                 "proguard-rules.pro"
             )
+            manifestPlaceholders.apply {
+                this["background_app_name"] = appName
+            }
         }
     }
     compileOptions {
@@ -34,29 +43,32 @@ android {
     }
     kotlinOptions {
         jvmTarget = "1.8"
-        useIR = true
     }
     buildFeatures {
         compose = true
     }
     composeOptions {
         kotlinCompilerExtensionVersion = rootProject.extra["compose_version"] as String
-        kotlinCompilerVersion = "1.4.32"
     }
 }
 
 dependencies {
+    implementation(project(":lib"))
 
-    implementation("androidx.core:core-ktx:1.3.2")
-    implementation("androidx.appcompat:appcompat:1.2.0")
-    implementation("com.google.android.material:material:1.3.0")
-    implementation("androidx.compose.ui:ui:${rootProject.extra["compose_version"]}")
-    implementation("androidx.compose.material:material:${rootProject.extra["compose_version"]}")
-    implementation("androidx.compose.ui:ui-tooling:${rootProject.extra["compose_version"]}")
-    implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.3.1")
-    implementation("androidx.activity:activity-compose:1.3.0-alpha07")
+    // optional - Test helpers
+    testImplementation("androidx.room:room-testing:${rootProject.extra["room_version"]}")
+    //测试
     testImplementation("junit:junit:4.13.2")
+    /**
+     * A cross environment JUnit4 runner for Android tests.
+     * https://developer.android.com/reference/androidx/test/ext/junit/runners/package-summary?hl=en
+     */
     androidTestImplementation("androidx.test.ext:junit:1.1.2")
+    /**
+     * https://developer.android.com/training/testing/espresso
+     * 使用 Espresso 来编写简洁、美观且可靠的 Android 界面测试。
+     * 包含核心和基本的 View 匹配器、操作和断言
+     */
     androidTestImplementation("androidx.test.espresso:espresso-core:3.3.0")
     androidTestImplementation("androidx.compose.ui:ui-test-junit4:${rootProject.extra["compose_version"]}")
 }
\ No newline at end of file
diff --git a/build.gradle.kts b/build.gradle.kts
index c697028..edde590 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
     //Jetpack Compose版本
-    val compose_version by extra("1.0.0-beta05")
+    val compose_version by extra("1.0.0-beta06")
     //生命周期组件版本
     val lifecycle_version by extra("2.3.1")
     //APP应用名字
@@ -13,6 +13,8 @@ buildscript {
     repositories {
         maven("https://maven.aliyun.com/repository/google")
         maven("https://maven.aliyun.com/repository/public")
+        google()
+        mavenCentral()
     }
     dependencies {
         classpath("com.android.tools.build:gradle:7.0.0-alpha15")
diff --git a/foreground/build.gradle.kts b/foreground/build.gradle.kts
index 2b19d69..2f2a050 100644
--- a/foreground/build.gradle.kts
+++ b/foreground/build.gradle.kts
@@ -1,7 +1,6 @@
 plugins {
     id("com.android.application")
     id("kotlin-android")
-    id("org.jetbrains.kotlin.plugin.serialization") version "1.4.32"
     id("kotlin-kapt")
 }
 
@@ -50,7 +49,6 @@ android {
     }
     kotlinOptions {
         jvmTarget = "1.8"
-        useIR = true
     }
     buildFeatures {
         compose = true
@@ -65,76 +63,9 @@ android {
 }
 
 dependencies {
-    /**
-     * 针对最新的平台功能和 API 调整应用，同时还支持旧设备。
-     * https://developer.android.com/jetpack/androidx/releases/core
-     */
-    implementation("androidx.core:core-ktx:1.3.2")
-    /**
-     * 允许在平台旧版 API 上访问新 API（很多使用 Material Design）。
-     * https://developer.android.com/jetpack/androidx/releases/appcompat
-     */
-    implementation("androidx.appcompat:appcompat:1.2.0")
-    /**
-     * 与设备互动所需的 Compose UI 的基本组件，包括布局、绘图和输入。
-     * https://developer.android.com/jetpack/androidx/releases/compose-ui
-     */
-    implementation("androidx.compose.ui:ui:${rootProject.extra["compose_version"]}")
-    implementation("androidx.compose.ui:ui-tooling:${rootProject.extra["compose_version"]}")
-    /**
-     * Compose 的编程模型和状态管理的基本构建块，以及 Compose 编译器插件针对的核心运行时。
-     * https://developer.android.com/jetpack/androidx/releases/compose-runtime
-     */
-    implementation("androidx.compose.runtime:runtime-livedata:${rootProject.extra["compose_version"]}")
-    //Material Components
-    implementation("com.google.android.material:material:1.3.0")
-    /**
-     * 使用现成可用的 Material Design 组件构建 Jetpack Compose UI。这是更高层级的 Compose 入口点，旨在提供与 www.material.io 上描述的组件一致的组件。
-     * https://developer.android.com/jetpack/androidx/releases/compose-material
-     */
-    implementation("androidx.compose.material:material:${rootProject.extra["compose_version"]}")
-    /**
-     * 生命周期感知型组件
-     * https://developer.android.com/jetpack/androidx/releases/lifecycle
-     */
-    implementation("androidx.lifecycle:lifecycle-runtime-ktx:${rootProject.extra["lifecycle_version"]}")
-    implementation("androidx.lifecycle:lifecycle-viewmodel-compose:1.0.0-alpha04")
-    /**
-     * 访问基于 Activity 构建的可组合 API。
-     * https://developer.android.com/jetpack/androidx/releases/activity
-     */
-    implementation("androidx.activity:activity-compose:1.3.0-alpha07")
-    /**
-     * Simple, pretty and powerful logger for android
-     * https://github.com/orhanobut/logger
-     */
-    implementation("com.orhanobut:logger:2.2.0")
-    /**
-     *
-     * https://github.com/square/okhttp
-     */
-    implementation("com.squareup.okhttp3:okhttp:4.9.1")
-    /**
-     * https://github.com/google/gson
-     */
-    implementation("com.google.code.gson:gson:2.8.6")
-    /**
-     * https://kotlinlang.org/docs/serialization.html
-     */
-    implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.1.0")
-
-    implementation("org.jetbrains.kotlin:kotlin-reflect:${rootProject.extra["kotlin_version"]}")
-    /**
-     * https://developer.android.com/jetpack/androidx/releases/navigation
-     */
-    implementation("androidx.navigation:navigation-compose:1.0.0-alpha10")
-    /**
-     * https://developer.android.com/jetpack/androidx/releases/room
-     */
-    implementation("androidx.room:room-runtime:${rootProject.extra["room_version"]}")
+    implementation(project(":lib"))
     kapt("androidx.room:room-compiler:${rootProject.extra["room_version"]}")
-    // optional - Kotlin Extensions and Coroutines support for Room
-    implementation("androidx.room:room-ktx:${rootProject.extra["room_version"]}")
+
     // optional - Test helpers
     testImplementation("androidx.room:room-testing:${rootProject.extra["room_version"]}")
     //测试
@@ -152,5 +83,4 @@ dependencies {
     androidTestImplementation("androidx.test.espresso:espresso-core:3.3.0")
     androidTestImplementation("androidx.compose.ui:ui-test-junit4:${rootProject.extra["compose_version"]}")
 
-
 }
\ No newline at end of file
diff --git a/foreground/src/main/java/com/gyf/csams/APP.kt b/foreground/src/main/java/com/gyf/csams/APP.kt
index aa3fe94..ef19edf 100644
--- a/foreground/src/main/java/com/gyf/csams/APP.kt
+++ b/foreground/src/main/java/com/gyf/csams/APP.kt
@@ -1,112 +1,75 @@
 package com.gyf.csams
 
 import android.app.Application
-import android.content.res.Resources
-import android.graphics.Bitmap
-import android.graphics.BitmapFactory
-import android.util.LruCache
 import androidx.compose.ui.graphics.ImageBitmap
 import androidx.compose.ui.graphics.asImageBitmap
+import coil.ImageLoader
+import coil.ImageLoaderFactory
+import coil.imageLoader
+import coil.memory.MemoryCache
+import coil.request.ImageRequest
+import coil.util.CoilUtils
 import com.gyf.csams.uikit.BackgroundImage
+import com.gyf.csams.util.ImageUtil
 import com.orhanobut.logger.AndroidLogAdapter
 import com.orhanobut.logger.DiskLogAdapter
 import com.orhanobut.logger.Logger
+import okhttp3.OkHttpClient
 
-class APP : Application() {
+class APP : Application(), ImageLoaderFactory {
 
+    private val backgroundImage = mutableMapOf<BackgroundImage, MemoryCache.Key?>()
 
-    private lateinit var memoryCache: LruCache<BackgroundImage, Bitmap>
-
-    // Get max available VM memory, exceeding this amount will throw an
-    // OutOfMemory exception. Stored in kilobytes as LruCache takes an
-    // int in its constructor.
-    private val maxMemory = (Runtime.getRuntime().maxMemory() / 1024).toInt()
-
-    // Use 1/8th of the available memory for this memory cache.
-    val cacheSize = maxMemory / 8
-
-    fun getImage(image: BackgroundImage, reqWidth: Int, reqHeight: Int): ImageBitmap {
-        val bitmap = memoryCache.get(image)
-        return if (bitmap == null) {
-            Logger.i("reqWidth=$reqWidth,reqHeight=$reqHeight")
-            val cacheValue = decodeSampledBitmapFromResource(
-                res = resources,
-                image.id,
-                reqWidth = reqWidth,
-                reqHeight = reqHeight
-            )
-            memoryCache.put(image, cacheValue)
-            Logger.i("添加缓存：${image}")
-            cacheValue.asImageBitmap()
+    suspend fun getImage(image: BackgroundImage): ImageBitmap? {
+        val key = backgroundImage[image]
+        if (key != null) {
+            return applicationContext.imageLoader.memoryCache[key]?.asImageBitmap()
+                ?: ImageUtil.getImage(applicationContext, image.id)
         } else {
-            Logger.i("从缓存读取：${image}")
-            bitmap.asImageBitmap()
+            throw IllegalArgumentException("无法从${key}获取背景图！")
         }
     }
 
-    private fun decodeSampledBitmapFromResource(
-        res: Resources,
-        resId: Int,
-        reqWidth: Int,
-        reqHeight: Int
-    ): Bitmap {
-        // First decode with inJustDecodeBounds=true to check dimensions
-        return BitmapFactory.Options().run {
-            inJustDecodeBounds = true
-            BitmapFactory.decodeResource(res, resId, this)
-
-            // Calculate inSampleSize
-            inSampleSize = calculateInSampleSize(this, reqWidth, reqHeight)
-
-            // Decode bitmap with inSampleSize set
-            inJustDecodeBounds = false
-
-            BitmapFactory.decodeResource(res, resId, this)
-        }
+    override fun newImageLoader(): ImageLoader {
+        return ImageLoader.Builder(applicationContext)
+            .crossfade(true)
+            .okHttpClient {
+                OkHttpClient.Builder()
+                    .cache(CoilUtils.createDefaultCache(applicationContext))
+                    .build()
+            }
+            .build()
     }
 
-    private fun calculateInSampleSize(
-        options: BitmapFactory.Options,
-        reqWidth: Int,
-        reqHeight: Int
-    ): Int {
-        // Raw height and width of image
-        val (height: Int, width: Int) = options.run { outHeight to outWidth }
-        var inSampleSize = 1
-
-        if (height > reqHeight || width > reqWidth) {
-
-            val halfHeight: Int = height / 2
-            val halfWidth: Int = width / 2
-
-            // Calculate the largest inSampleSize value that is a power of 2 and keeps both
-            // height and width larger than the requested height and width.
-            while (halfHeight / inSampleSize >= reqHeight && halfWidth / inSampleSize >= reqWidth) {
-                inSampleSize *= 2
-            }
+    /**
+     * 预加载背景图
+     *
+     */
+    private fun preloadImage() {
+        BackgroundImage.values().forEach {
+            Logger.i("预加载背景图:${it.name}")
+            val request = ImageRequest.Builder(applicationContext)
+                .data(it.id)
+                // Optional, but setting a ViewSizeResolver will conserve memory by limiting the size the image should be preloaded into memory at.
+                .size(800, 600)
+                .listener { _, metadata ->
+                    Logger.i("metadata.memoryCacheKey=${metadata.memoryCacheKey}")
+                    backgroundImage[it] = metadata.memoryCacheKey
+                }
+                .build()
+            applicationContext.imageLoader.enqueue(request = request)
         }
 
-        return inSampleSize
     }
 
     override fun onCreate() {
         super.onCreate()
-
-        memoryCache = object : LruCache<BackgroundImage, Bitmap>(cacheSize) {
-
-            override fun sizeOf(key: BackgroundImage, bitmap: Bitmap): Int {
-                // The cache size will be measured in kilobytes rather than
-                // number of items.
-                return bitmap.byteCount / 1024
-            }
-        }
-
         //初始化日志
         Logger.addLogAdapter(AndroidLogAdapter())
         Logger.addLogAdapter(DiskLogAdapter())
 
         Logger.i("${BuildConfig.foreground_app_name}启动")
 
-
+        preloadImage()
     }
 }
\ No newline at end of file
diff --git a/foreground/src/main/java/com/gyf/csams/Api.kt b/foreground/src/main/java/com/gyf/csams/Api.kt
index 59a431e..5c82c01 100644
--- a/foreground/src/main/java/com/gyf/csams/Api.kt
+++ b/foreground/src/main/java/com/gyf/csams/Api.kt
@@ -11,10 +11,10 @@ interface UrlPath {
  * @property path
  */
 enum class AccountApi(val path: String) : UrlPath {
-    register("/register"),
-    checkId("/register/checkId"),
-    login("/login"),
-    loginToken("/login/token");
+    Register("/register"),
+    CheckId("/register/checkId"),
+    Login("/login"),
+    LoginToken("/login/token");
 
 
     override fun build(): String {
@@ -22,6 +22,14 @@ enum class AccountApi(val path: String) : UrlPath {
     }
 }
 
+enum class MainApi(val path: String) : UrlPath {
+    HotActivity("/hotActivity");
+
+    override fun build(): String {
+        return "/api/main/${this.path}"
+    }
+}
+
 /**
  * 构建服务端请求接口地址
  *
diff --git a/foreground/src/main/java/com/gyf/csams/InitViewModel.kt b/foreground/src/main/java/com/gyf/csams/InitViewModel.kt
index 37992ca..0944146 100644
--- a/foreground/src/main/java/com/gyf/csams/InitViewModel.kt
+++ b/foreground/src/main/java/com/gyf/csams/InitViewModel.kt
@@ -41,7 +41,7 @@ class InitViewModel : ViewModel() {
             val tokenList = db?.tokenDao()?.queryAll()
             if (tokenList != null && tokenList.size == 1) {
                 val currentToken: Token = tokenList[0]
-                val url = Api.buildUrl(AccountApi.loginToken)
+                val url = Api.buildUrl(AccountApi.LoginToken)
                 val action = "校验token"
                 Logger.i("${action}api=$url")
                 HttpClient.post(
diff --git a/foreground/src/main/java/com/gyf/csams/account/model/AccountViewModel.kt b/foreground/src/main/java/com/gyf/csams/account/model/AccountViewModel.kt
index c1a1a99..2fdbae3 100644
--- a/foreground/src/main/java/com/gyf/csams/account/model/AccountViewModel.kt
+++ b/foreground/src/main/java/com/gyf/csams/account/model/AccountViewModel.kt
@@ -176,7 +176,7 @@ class AccountViewModel(application: Application) : AndroidViewModel(application)
             } else {
                 _isRepeat.postValue(null)
                 checkJob = viewModelScope.launch {
-                    val url = Api.buildUrl(AccountApi.checkId)
+                    val url = Api.buildUrl(AccountApi.CheckId)
                     Logger.i("检测${studentId.formDesc},请求接口$url")
                     HttpClient.get(
                         url, SimpleCallback<Boolean>(
@@ -232,7 +232,7 @@ class AccountViewModel(application: Application) : AndroidViewModel(application)
      */
     fun register() {
         if (checkForm()) {
-            val url = Api.buildUrl(AccountApi.register)
+            val url = Api.buildUrl(AccountApi.Register)
             Logger.i("开始$regBtnDesc,请求接口：$url")
             HttpClient.post(
                 url, SimpleCallback<UserResDto>(
@@ -288,7 +288,7 @@ class AccountViewModel(application: Application) : AndroidViewModel(application)
      */
     fun login() {
         if (checkForm()) {
-            val url = Api.buildUrl(AccountApi.login)
+            val url = Api.buildUrl(AccountApi.Login)
             Logger.i("开始$loginDesc,请求接口：$url")
             HttpClient.post(
                 url,
diff --git a/foreground/src/main/java/com/gyf/csams/association/ui/AssociationActivity.kt b/foreground/src/main/java/com/gyf/csams/association/ui/AssociationActivity.kt
index 101aa2a..dd64bb6 100644
--- a/foreground/src/main/java/com/gyf/csams/association/ui/AssociationActivity.kt
+++ b/foreground/src/main/java/com/gyf/csams/association/ui/AssociationActivity.kt
@@ -432,7 +432,7 @@ class AssociationActivity : ComponentActivity() {
             val weight = 0.5F
             val spaceWeight = (1 - 0.5F) / 2
             Spacer(modifier = Modifier.weight(spaceWeight))
-            Poster(id = R.drawable.ic_launcher_foreground, modifier = Modifier.weight(weight))
+            Poster(modifier = Modifier.weight(weight))
             Spacer(modifier = Modifier.weight(spaceWeight))
         }
 
diff --git a/foreground/src/main/java/com/gyf/csams/main/model/MainViewModel.kt b/foreground/src/main/java/com/gyf/csams/main/model/MainViewModel.kt
index ebe4739..3ee6b01 100644
--- a/foreground/src/main/java/com/gyf/csams/main/model/MainViewModel.kt
+++ b/foreground/src/main/java/com/gyf/csams/main/model/MainViewModel.kt
@@ -5,7 +5,6 @@ import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.gyf.csams.NOT_IMPL_TIP
-import com.gyf.csams.R
 import com.gyf.csams.uikit.ScrollList
 import com.gyf.csams.uikit.SendInterface
 import com.gyf.csams.uikit.StringForm
@@ -43,39 +42,6 @@ class MarqueeViewModel : ViewModel() {
     }
 }
 
-/**
- * 海报轮播
- *
- */
-class CarouselViewModel : ViewModel() {
-    val imageList = listOf(
-        R.drawable.ic_launcher_foreground,
-        R.drawable.ic_account_fill,
-        R.drawable.ic_all_fill,
-        R.drawable.ic_home_fill
-    )
-
-    private val _index = MutableLiveData(0)
-
-    val index: LiveData<Int> = _index
-
-    private var job: Job? = null
-
-    init {
-        start()
-    }
-
-    private fun start() {
-        job = viewModelScope.launch {
-            do {
-                _index.postValue(if (_index.value == imageList.size - 1) 0 else _index.value?.plus(1))
-                delay(5000)
-            } while (job?.isActive == true)
-        }
-    }
-
-}
-
 /**
  * 社团
  *
diff --git a/foreground/src/main/java/com/gyf/csams/main/ui/MainActivity.kt b/foreground/src/main/java/com/gyf/csams/main/ui/MainActivity.kt
index faffe03..7ced8a3 100644
--- a/foreground/src/main/java/com/gyf/csams/main/ui/MainActivity.kt
+++ b/foreground/src/main/java/com/gyf/csams/main/ui/MainActivity.kt
@@ -25,6 +25,8 @@ import androidx.lifecycle.viewmodel.compose.viewModel
 import androidx.navigation.NavHostController
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
+import com.gyf.csams.Api
+import com.gyf.csams.MainApi
 import com.gyf.csams.R
 import com.gyf.csams.activity.ui.ActivityDetailActivity
 import com.gyf.csams.association.ui.AssociationActivity
@@ -41,9 +43,14 @@ import com.gyf.csams.util.randomChinese
  *
  */
 class MainActivity : ComponentActivity() {
+
+    lateinit var imageModel: ImageModel
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
+        imageModel = ImageModel(application = application, Api.buildUrl(MainApi.HotActivity))
+
         setContent {
             CSAMSTheme {
                 Body { nav, scaffoldState ->
@@ -69,6 +76,22 @@ class MainActivity : ComponentActivity() {
 
     }
 
+    override fun onStart() {
+        super.onStart()
+        imageModel.start()
+    }
+
+    override fun onResume() {
+        super.onResume()
+        imageModel.start()
+    }
+
+    override fun onPause() {
+        super.onPause()
+        imageModel.cancel()
+    }
+
+
     /**
      * 个人中心
      *
@@ -467,16 +490,17 @@ class MainActivity : ComponentActivity() {
      *
      */
     @Composable
-    private fun PosterWithDesc(model: CarouselViewModel = viewModel()) {
-        Carousel(model = model) {
-            val context = LocalContext.current
+    private fun PosterWithDesc() {
+
+        val context = LocalContext.current as MainActivity
+        Carousel(imageBitmap = context.imageModel.image) {
             Column(modifier = Modifier.clickable(onClick = {
                 context.startActivity(Intent(context, ActivityDetailActivity::class.java))
             })) {
                 Poster(
                     modifier = Modifier
                         .weight(0.6F)
-                        .fillMaxWidth(), id = it
+                        .fillMaxWidth()
                 )
 
                 DescCard(
diff --git a/foreground/src/main/java/com/gyf/csams/uikit/BaseView.kt b/foreground/src/main/java/com/gyf/csams/uikit/BaseView.kt
index 2d46753..fb5ae49 100644
--- a/foreground/src/main/java/com/gyf/csams/uikit/BaseView.kt
+++ b/foreground/src/main/java/com/gyf/csams/uikit/BaseView.kt
@@ -18,6 +18,7 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.DefaultAlpha
+import androidx.compose.ui.graphics.ImageBitmap
 import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.platform.LocalFocusManager
@@ -34,7 +35,6 @@ import androidx.navigation.compose.navigate
 import androidx.navigation.compose.rememberNavController
 import com.gyf.csams.APP
 import com.gyf.csams.R
-import com.gyf.csams.main.model.CarouselViewModel
 import com.gyf.csams.main.model.MarqueeViewModel
 import com.orhanobut.logger.Logger
 import kotlinx.coroutines.launch
@@ -462,13 +462,14 @@ fun MainFrame(background: @Composable () -> Unit, body: @Composable ColumnScope.
  */
 @Composable
 fun Carousel(
-    model: CarouselViewModel = viewModel(),
+    imageBitmap: LiveData<ImageBitmap>,
     durationMillis: Int = 2000,
-    content: @Composable (id: Int) -> Unit
+    content: @Composable (imageBitmap: ImageBitmap?) -> Unit
 ) {
-    val index: Int by model.index.observeAsState(0)
-    Crossfade(targetState = index, animationSpec = tween(durationMillis = durationMillis)) {
-        content(id = model.imageList[it])
+    val data by imageBitmap.observeAsState()
+
+    Crossfade(targetState = data, animationSpec = tween(durationMillis = durationMillis)) {
+        content(imageBitmap = it)
     }
 }
 
@@ -600,20 +601,22 @@ enum class BackgroundImage(@DrawableRes val id: Int) {
 @Composable
 fun Background(image: BackgroundImage, alpha: Float = DefaultAlpha) {
     val app = LocalContext.current.applicationContext as APP
-
-    BoxWithConstraints {
+    var i: ImageBitmap? by remember {
+        mutableStateOf(null)
+    }
+    LaunchedEffect(image) {
+        i = app.getImage(image = image)
+    }
+    i?.let {
         Image(
-            bitmap = app.getImage(
-                image = image,
-                reqHeight = maxHeight.value.toInt() / 2,
-                reqWidth = maxWidth.value.toInt() / 2
-            ),
+            bitmap = it,
             contentDescription = null,
-            contentScale = ContentScale.FillHeight,
+            contentScale = ContentScale.FillBounds,
             alpha = alpha,
             modifier = Modifier.fillMaxSize()
         )
     }
+
 }
 
 /**
@@ -654,7 +657,7 @@ fun Body(content: @Composable (nav: NavHostController, scaffoldState: ScaffoldSt
  *
  */
 @Composable
-fun Poster(modifier: Modifier = Modifier, @DrawableRes id: Int) {
+fun Poster(modifier: Modifier = Modifier, imageBitmap: ImageBitmap? = null) {
     Card(
         modifier = modifier,
         backgroundColor = Color.Transparent
@@ -665,11 +668,18 @@ fun Poster(modifier: Modifier = Modifier, @DrawableRes id: Int) {
                 contentDescription = null,
                 modifier = Modifier.fillMaxSize()
             )
-            Image(
-                painter = painterResource(id = id),
-                contentDescription = null,
-                modifier = Modifier.fillMaxSize()
-            )
+            if (imageBitmap != null) {
+                Image(
+                    bitmap = imageBitmap,
+                    contentDescription = null,
+                    modifier = Modifier.fillMaxSize()
+                )
+            } else {
+                Image(
+                    painter = painterResource(id = R.drawable.ic_launcher_foreground),
+                    contentDescription = null
+                )
+            }
         }
     }
 }
@@ -764,4 +774,8 @@ fun MyBottomAppBarPreview() {
             }
         }
     }
+}
+
+fun TestPreview() {
+
 }
\ No newline at end of file
diff --git a/foreground/src/main/java/com/gyf/csams/uikit/ViewModel.kt b/foreground/src/main/java/com/gyf/csams/uikit/ViewModel.kt
index 985563c..9bb5e00 100644
--- a/foreground/src/main/java/com/gyf/csams/uikit/ViewModel.kt
+++ b/foreground/src/main/java/com/gyf/csams/uikit/ViewModel.kt
@@ -1,10 +1,18 @@
 package com.gyf.csams.uikit
 
+import android.app.Application
 import androidx.compose.material.SnackbarDuration
-import androidx.lifecycle.LiveData
-import androidx.lifecycle.MutableLiveData
-import androidx.lifecycle.ViewModel
+import androidx.compose.ui.graphics.ImageBitmap
+import androidx.lifecycle.*
+import com.google.gson.reflect.TypeToken
+import com.gyf.csams.R
+import com.gyf.csams.util.HttpClient
+import com.gyf.csams.util.ImageUtil
+import com.gyf.csams.util.SimpleCallback
 import com.orhanobut.logger.Logger
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.launch
 
 interface FormLength {
     val nameLengthError: String
@@ -77,6 +85,74 @@ class ScaffoldModel : ViewModel() {
     }
 }
 
+
+class ImageModel(application: Application, private val urlPath: String) :
+    AndroidViewModel(application) {
+    private val _image = MutableLiveData<ImageBitmap>()
+    private val _imageUrls = MutableLiveData<List<String>>()
+    val image: LiveData<ImageBitmap> = _image
+    private var job: Job? = null
+
+    /**
+     * 加载默认图片
+     *
+     */
+    private fun defaultLoad() {
+        viewModelScope.launch {
+            _image.postValue(
+                ImageUtil.getImage(
+                    getApplication(),
+                    R.drawable.ic_launcher_foreground
+                )
+            )
+        }
+    }
+
+    /**
+     * 循环加载网络图片
+     *
+     */
+    fun start() {
+        Logger.i("启动轮播")
+        if (job == null || job?.isCompleted == true || job?.isCancelled == true) {
+            job = viewModelScope.launch {
+                HttpClient.get(
+                    url = urlPath,
+                    SimpleCallback<List<String>>("请求图片url列表", onSuccess = {
+                        _imageUrls.postValue(it.body)
+                        var index = 0
+                        _imageUrls.value?.apply {
+                            viewModelScope.launch {
+                                do {
+                                    val imageBitmap =
+                                        ImageUtil.getImage(
+                                            context = getApplication(),
+                                            data = get(index)
+                                        )
+                                    Logger.e("成功从image url:${get(index)}解析图片")
+                                    _image.postValue(imageBitmap)
+                                    delay(5000)
+                                    index = if (index == size - 1) 0 else index.plus(1)
+                                } while (job?.isActive == true)
+                            }
+                        }
+                    }, onFail = {
+                        Logger.e("无法从接口地址：${urlPath}获取图片url列表")
+                        defaultLoad()
+                    }, type = object : TypeToken<List<String>>() {}.type)
+                )
+            }.apply {
+                start()
+            }
+        }
+    }
+
+    fun cancel() {
+        Logger.i("停止轮播")
+        job?.cancel()
+    }
+}
+
 abstract class ScrollList<T> : ViewModel() {
     protected val _data = MutableLiveData<MutableList<T>>(mutableListOf())
     val data: LiveData<MutableList<T>> = _data
diff --git a/foreground/src/main/java/com/gyf/csams/util/HttpUtil.kt b/foreground/src/main/java/com/gyf/csams/util/HttpUtil.kt
index 93ccbc5..8488d5b 100644
--- a/foreground/src/main/java/com/gyf/csams/util/HttpUtil.kt
+++ b/foreground/src/main/java/com/gyf/csams/util/HttpUtil.kt
@@ -15,7 +15,12 @@ object HttpClient {
 
     private val JSON_CONTENT_TYPE = "application/json; charset=UTF-8".toMediaType()
 
-
+    /**
+     * 构建url查询参数
+     *
+     * @param params
+     * @return
+     */
     private fun buildQueryParams(params: Map<String, String>?): String {
         return if (params?.isNotEmpty() == true) {
             val urlPath = StringBuilder("?")
@@ -29,6 +34,12 @@ object HttpClient {
         }
     }
 
+    /**
+     * 构建表单参数
+     *
+     * @param params
+     * @return
+     */
     private fun buildFormBody(params: Map<String, String>?): FormBody {
         val builder = FormBody.Builder()
         if (params?.isNotEmpty() == true) {
@@ -92,10 +103,25 @@ object HttpClient {
 
 }
 
-
+/**
+ * 接口响应实体
+ *
+ * @param T
+ * @property code
+ * @property message
+ * @property body
+ */
 data class ApiResponse<T>(val code: Int, val message: String, val body: T? = null)
 
-
+/**
+ * http请求回调
+ *
+ * @param T
+ * @property action
+ * @property onSuccess
+ * @property onFail
+ * @property type
+ */
 class SimpleCallback<T>(
     private val action: String,
     private val onSuccess: (res: ApiResponse<T>) -> Unit,
diff --git a/foreground/src/main/java/com/gyf/csams/util/ImageUtil.kt b/foreground/src/main/java/com/gyf/csams/util/ImageUtil.kt
new file mode 100644
index 0000000..f0dcb26
--- /dev/null
+++ b/foreground/src/main/java/com/gyf/csams/util/ImageUtil.kt
@@ -0,0 +1,46 @@
+package com.gyf.csams.util
+
+import android.content.Context
+import androidx.compose.ui.graphics.ImageBitmap
+import androidx.compose.ui.graphics.asImageBitmap
+import androidx.core.graphics.drawable.toBitmap
+import coil.imageLoader
+import coil.request.ErrorResult
+import coil.request.ImageRequest
+import coil.request.SuccessResult
+import com.orhanobut.logger.Logger
+
+class ImageUtil {
+    companion object {
+        /**
+         *
+         *
+         * @param data Set the data to load.
+         *             The default supported data types are:
+         *             String (mapped to a Uri)
+         *             Uri ("android.resource", "content", "file", "http", and "https" schemes only)
+         *             HttpUrl
+         *             File
+         *             DrawableRes
+         *             Drawable
+         *             Bitmap
+         */
+        suspend fun getImage(context: Context, data: Any?): ImageBitmap? {
+            val request = ImageRequest.Builder(context)
+                .data(data = data)
+                .build()
+            return when (val result = context.imageLoader.execute(request)) {
+                is SuccessResult -> result.drawable.toBitmap().asImageBitmap()
+                is ErrorResult -> {
+                    val drawable = result.drawable
+                    return if (drawable == null) {
+                        Logger.e("${data}图片加载失败")
+                        null
+                    } else {
+                        drawable.toBitmap().asImageBitmap()
+                    }
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 573d8fa..0f80bbf 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,5 @@
-#Sat Apr 17 15:25:36 CST 2021
 distributionBase=GRADLE_USER_HOME
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.0-bin.zip
 distributionPath=wrapper/dists
-zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-bin.zip
 zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
index 153015f..4f906e0 100644
--- a/gradlew
+++ b/gradlew
@@ -1,5 +1,21 @@
 #!/usr/bin/env sh
 
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 ##############################################################################
 ##
 ##  Gradle start up script for UN*X
@@ -24,11 +40,11 @@ cd "`dirname \"$PRG\"`/" >/dev/null
 APP_HOME="`pwd -P`"
 cd "$SAVED" >/dev/null
 
-foreground_app_name="Gradle"
+APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS=""
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
@@ -66,6 +82,7 @@ esac
 
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
+
 # Determine the Java command to use to start the JVM.
 if [ -n "$JAVA_HOME" ] ; then
     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
@@ -106,13 +123,14 @@ fi
 
 # For Darwin, add options to specify how the application appears in the dock
 if $darwin; then
-    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$foreground_app_name\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
 fi
 
-# For Cygwin, switch paths to Windows format before running java
-if $cygwin ; then
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
     JAVACMD=`cygpath --unix "$JAVACMD"`
 
     # We build the pattern for arguments to be converted via cygpath
@@ -138,19 +156,19 @@ if $cygwin ; then
         else
             eval `echo args$i`="\"$arg\""
         fi
-        i=$((i+1))
+        i=`expr $i + 1`
     done
     case $i in
-        (0) set -- ;;
-        (1) set -- "$args0" ;;
-        (2) set -- "$args0" "$args1" ;;
-        (3) set -- "$args0" "$args1" "$args2" ;;
-        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
     esac
 fi
 
@@ -159,14 +177,9 @@ save () {
     for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
     echo " "
 }
-APP_ARGS=$(save "$@")
+APP_ARGS=`save "$@"`
 
 # Collect all arguments for the java command, following the shell quoting and substitution rules
 eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
 
-# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
-if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
-  cd "$(dirname "$0")"
-fi
-
 exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
index f955316..107acd3 100644
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -1,3 +1,19 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
 @if "%DEBUG%" == "" @echo off
 @rem ##########################################################################
 @rem
@@ -13,15 +29,18 @@ if "%DIRNAME%" == "" set DIRNAME=.
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS=
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome
 
 set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto init
+if "%ERRORLEVEL%" == "0" goto execute
 
 echo.
 echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
@@ -35,7 +54,7 @@ goto fail
 set JAVA_HOME=%JAVA_HOME:"=%
 set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 
-if exist "%JAVA_EXE%" goto init
+if exist "%JAVA_EXE%" goto execute
 
 echo.
 echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
@@ -45,28 +64,14 @@ echo location of your Java installation.
 
 goto fail
 
-:init
-@rem Get command-line arguments, handling Windows variants
-
-if not "%OS%" == "Windows_NT" goto win9xME_args
-
-:win9xME_args
-@rem Slurp the command line arguments.
-set CMD_LINE_ARGS=
-set _SKIP=2
-
-:win9xME_args_slurp
-if "x%~1" == "x" goto execute
-
-set CMD_LINE_ARGS=%*
-
 :execute
 @rem Setup the command line
 
 set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 
+
 @rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
 
 :end
 @rem End local scope for the variables with windows NT shell
diff --git a/lib/.gitignore b/lib/.gitignore
new file mode 100644
index 0000000..42afabf
--- /dev/null
+++ b/lib/.gitignore
@@ -0,0 +1 @@
+/build
\ No newline at end of file
diff --git a/lib/build.gradle.kts b/lib/build.gradle.kts
new file mode 100644
index 0000000..88648cc
--- /dev/null
+++ b/lib/build.gradle.kts
@@ -0,0 +1,106 @@
+plugins {
+    id("com.android.library")
+    id("kotlin-android")
+    id("org.jetbrains.kotlin.plugin.serialization") version "1.4.32"
+}
+
+android {
+    compileSdk = 30
+
+    defaultConfig {
+        minSdk = 21
+        targetSdk = 30
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+        consumerProguardFiles("consumer-rules.pro")
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}
+
+dependencies {
+    /**
+     * 针对最新的平台功能和 API 调整应用，同时还支持旧设备。
+     * https://developer.android.com/jetpack/androidx/releases/core
+     */
+    api("androidx.core:core-ktx:1.3.2")
+    /**
+     * 允许在平台旧版 API 上访问新 API（很多使用 Material Design）。
+     * https://developer.android.com/jetpack/androidx/releases/appcompat
+     */
+    api("androidx.appcompat:appcompat:1.2.0")
+    /**
+     * 与设备互动所需的 Compose UI 的基本组件，包括布局、绘图和输入。
+     * https://developer.android.com/jetpack/androidx/releases/compose-ui
+     */
+    api("androidx.compose.ui:ui:${rootProject.extra["compose_version"]}")
+    api("androidx.compose.ui:ui-tooling:${rootProject.extra["compose_version"]}")
+    /**
+     * Compose 的编程模型和状态管理的基本构建块，以及 Compose 编译器插件针对的核心运行时。
+     * https://developer.android.com/jetpack/androidx/releases/compose-runtime
+     */
+    api("androidx.compose.runtime:runtime-livedata:${rootProject.extra["compose_version"]}")
+    //Material Components
+    api("com.google.android.material:material:1.3.0")
+    /**
+     * 使用现成可用的 Material Design 组件构建 Jetpack Compose UI。这是更高层级的 Compose 入口点，旨在提供与 www.material.io 上描述的组件一致的组件。
+     * https://developer.android.com/jetpack/androidx/releases/compose-material
+     */
+    api("androidx.compose.material:material:${rootProject.extra["compose_version"]}")
+    /**
+     * 生命周期感知型组件
+     * https://developer.android.com/jetpack/androidx/releases/lifecycle
+     */
+    api("androidx.lifecycle:lifecycle-runtime-ktx:${rootProject.extra["lifecycle_version"]}")
+    api("androidx.lifecycle:lifecycle-viewmodel-compose:1.0.0-alpha04")
+    /**
+     * 访问基于 Activity 构建的可组合 API。
+     * https://developer.android.com/jetpack/androidx/releases/activity
+     */
+    api("androidx.activity:activity-compose:1.3.0-alpha07")
+    /**
+     * Simple, pretty and powerful logger for android
+     * https://github.com/orhanobut/logger
+     */
+    api("com.orhanobut:logger:2.2.0")
+    /**
+     *
+     * https://github.com/square/okhttp
+     */
+    api("com.squareup.okhttp3:okhttp:4.9.1")
+    /**
+     * https://github.com/google/gson
+     */
+    api("com.google.code.gson:gson:2.8.6")
+    /**
+     * https://kotlinlang.org/docs/serialization.html
+     */
+    api("org.jetbrains.kotlinx:kotlinx-serialization-json:1.1.0")
+    /**
+     * https://developer.android.com/jetpack/androidx/releases/navigation
+     */
+    api("androidx.navigation:navigation-compose:1.0.0-alpha10")
+    /**
+     * https://developer.android.com/jetpack/androidx/releases/room
+     */
+    api("androidx.room:room-runtime:${rootProject.extra["room_version"]}")
+    // optional - Kotlin Extensions and Coroutines support for Room
+    api("androidx.room:room-ktx:${rootProject.extra["room_version"]}")
+    // https://github.com/coil-kt/coil/blob/master/README-zh.md
+    api("io.coil-kt:coil:1.2.1")
+}
\ No newline at end of file
diff --git a/lib/consumer-rules.pro b/lib/consumer-rules.pro
new file mode 100644
index 0000000..e69de29
diff --git a/lib/proguard-rules.pro b/lib/proguard-rules.pro
new file mode 100644
index 0000000..481bb43
--- /dev/null
+++ b/lib/proguard-rules.pro
@@ -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
\ No newline at end of file
diff --git a/lib/src/androidTest/java/com/gyf/lib/ExampleInstrumentedTest.kt b/lib/src/androidTest/java/com/gyf/lib/ExampleInstrumentedTest.kt
new file mode 100644
index 0000000..0b377f0
--- /dev/null
+++ b/lib/src/androidTest/java/com/gyf/lib/ExampleInstrumentedTest.kt
@@ -0,0 +1,22 @@
+package com.gyf.lib
+
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.platform.app.InstrumentationRegistry
+import org.junit.Assert.*
+import org.junit.Test
+import org.junit.runner.RunWith
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("com.gyf.lib.test", appContext.packageName)
+    }
+}
\ No newline at end of file
diff --git a/lib/src/main/AndroidManifest.xml b/lib/src/main/AndroidManifest.xml
new file mode 100644
index 0000000..4bfa72b
--- /dev/null
+++ b/lib/src/main/AndroidManifest.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest package="com.gyf.lib">
+
+</manifest>
\ No newline at end of file
diff --git a/lib/src/test/java/com/gyf/lib/ExampleUnitTest.kt b/lib/src/test/java/com/gyf/lib/ExampleUnitTest.kt
new file mode 100644
index 0000000..ae27851
--- /dev/null
+++ b/lib/src/test/java/com/gyf/lib/ExampleUnitTest.kt
@@ -0,0 +1,16 @@
+package com.gyf.lib
+
+import org.junit.Assert.*
+import org.junit.Test
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+class ExampleUnitTest {
+    @Test
+    fun addition_isCorrect() {
+        assertEquals(4, 2 + 2)
+    }
+}
\ No newline at end of file
diff --git a/settings.gradle.kts b/settings.gradle.kts
index c857320..dc9ec1e 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -4,8 +4,14 @@ dependencyResolutionManagement {
         maven("https://maven.aliyun.com/repository/google")
         maven("https://maven.aliyun.com/repository/public")
         maven("https://maven.aliyun.com/repository/jcenter")
+        google()
+        mavenCentral()
     }
 }
 rootProject.name = "CSAMS"
+//前台
 include(":foreground")
+//后台
 include(":background")
+//公共库
+include(":lib")