增加databinding的使用

增加paging分页工具

app/build.gradle

@@ -2,6 +2,7 @@ plugins {
     id 'com.android.application'
     id 'org.jetbrains.kotlin.android'
     id 'kotlin-android'
+    id 'kotlin-parcelize'
     id 'kotlin-kapt'
     id 'dagger.hilt.android.plugin'
 //    id 'com.google.dagger.hilt.android'
@@ -61,14 +62,17 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.5.1'
     implementation 'com.google.android.material:material:1.7.0'
     implementation "androidx.compose.material3:material3:1.0.0-alpha04"
+
+    //布局
     implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
 
-
+    //生命周期
     implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.4.1'
     implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.4.1'
     implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:2.4.1"
     implementation "androidx.lifecycle:lifecycle-common-java8:2.4.1"
 
+    //导航
     implementation 'androidx.navigation:navigation-fragment-ktx:2.4.1'
     implementation 'androidx.navigation:navigation-ui-ktx:2.4.1'
 
@@ -76,7 +80,7 @@ dependencies {
     androidTestImplementation 'androidx.test.ext:junit:1.1.4'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.0'
 
-    //room
+    //room 数据库相关
     implementation 'com.tencent.wcdb:room:1.1-19'  // 代替 room-runtime，同时也不需要再引用 wcdb-android
     api 'androidx.sqlite:sqlite:2.2.0'
     implementation 'androidx.room:room-runtime:2.4.3'
@@ -86,6 +90,10 @@ dependencies {
     kapt 'android.arch.persistence.room:compiler:1.1.1'// compiler 需要用 room 的
     kapt 'androidx.room:room-compiler:2.4.3'
     kapt 'androidx.room:room-ktx:2.4.3'
+    //分页加载
+    implementation "androidx.room:room-paging:2.4.3"
+    implementation "androidx.paging:paging-runtime-ktx:3.1.1"
+
     androidTestImplementation "android.arch.persistence.room:testing:1.1.1"
 //    implementation "android.arch.lifecycle:extensions:1.1.1"
 //    annotationProcessor "android.arch.lifecycle:compiler:1.1.1"
@@ -96,6 +104,8 @@ dependencies {
     implementation 'me.rosuh:AndroidFilePicker:0.8.2'
     // 时间选择器 https://github.com/Gredicer/datetimepicker
     implementation 'com.github.Gredicer:datetimepicker:V1.0.0'
+
+    //带侧滑的自定义列表
     implementation 'com.yanzhenjie.recyclerview:x:1.3.2'
 //    implementation 'androidx.appcompat:appcompat:1.5.1'
 
@@ -139,6 +149,8 @@ dependencies {
     implementation("com.github.bumptech.glide:glide:4.11.0") {
         exclude group: "com.android.support"
     }
+
+
 }
 
 kapt {

app/src/main/AndroidManifest.xml

@@ -21,7 +21,7 @@
         android:configChanges="locale"
         android:dataExtractionRules="@xml/data_extraction_rules"
         android:fullBackupContent="@xml/backup_rules"
-        android:icon="@mipmap/ic_launcher"
+        android:icon="@mipmap/volvo_logo_small"
         android:requestLegacyExternalStorage="true"
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"

app/src/main/java/com/navinfo/volvo/database/dao/GreetingMessageDao.kt

@@ -1,19 +1,27 @@
 package com.navinfo.volvo.database.dao
 
+import androidx.paging.PagingSource
 import androidx.room.Dao
 import androidx.room.Insert
 import androidx.room.OnConflictStrategy
 import androidx.room.Query
 import com.navinfo.volvo.database.entity.GreetingMessage
+import kotlinx.coroutines.flow.Flow
 
 @Dao
 interface GreetingMessageDao {
     @Insert(onConflict = OnConflictStrategy.REPLACE)
     fun insert(vararg check: GreetingMessage)
 
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    fun insert(list: List<GreetingMessage>)
+
     @Query("SELECT * FROM GreetingMessage where id =:id")
     fun findCheckManagerById(id: Long): GreetingMessage?
 
     @Query("SELECT * FROM GreetingMessage")
-    fun findList(): List<GreetingMessage>
+    fun findAllByFlow(): Flow<List<GreetingMessage>>
+
+    @Query("SELECT * FROM GreetingMessage")
+    fun findAllByDataSource(): PagingSource<Int, GreetingMessage>
 }

app/src/main/java/com/navinfo/volvo/database/entity/GreetingMessage.kt

@@ -1,8 +1,10 @@
 package com.navinfo.volvo.database.entity
 
+import android.os.Parcelable
 import androidx.room.Entity
 import androidx.room.PrimaryKey
 import androidx.room.TypeConverters
+import kotlinx.android.parcel.Parcelize
 import org.jetbrains.annotations.NotNull
 
 @Entity(tableName = "GreetingMessage")
@@ -40,5 +42,4 @@ data class GreetingMessage @JvmOverloads constructor(
      * 附件列表
      */
     var attachment: MutableList<Attachment> = mutableListOf()
-) {
+)
-}

app/src/main/java/com/navinfo/volvo/di/module/DatabaseModule.kt

@@ -5,6 +5,7 @@ import androidx.room.Room
 import com.navinfo.volvo.database.AppDatabase
 import com.navinfo.volvo.database.dao.GreetingMessageDao
 import com.navinfo.volvo.database.dao.UserDao
+import com.navinfo.volvo.utils.SystemConstant
 import com.tencent.wcdb.database.SQLiteCipherSpec
 import com.tencent.wcdb.room.db.WCDBOpenHelperFactory
 import dagger.Module
@@ -31,7 +32,7 @@ class DatabaseModule {
             .writeAheadLoggingEnabled(true)       // enable WAL mode, remove if not needed
             .asyncCheckpointEnabled(true);            // enable asynchronous checkpoint, remove if not needed
 
-        return Room.databaseBuilder(context, AppDatabase::class.java, "NavinfoVolvoDb")
+        return Room.databaseBuilder(context, AppDatabase::class.java, "${SystemConstant.ROOT_PATH}/NavinfoVolvoDb.db")
 
             // [WCDB] Specify open helper to use WCDB database implementation instead
             // of the Android framework.

app/src/main/java/com/navinfo/volvo/di/module/DatabaseRepositoryModule.kt

@@ -0,0 +1,15 @@
+package com.navinfo.volvo.di.module
+
+import com.navinfo.volvo.repository.database.DatabaseRepository
+import com.navinfo.volvo.repository.database.DatabaseRepositoryImp
+import dagger.Binds
+import dagger.Module
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+
+@InstallIn(SingletonComponent::class)
+@Module
+abstract class DatabaseRepositoryModule {
+    @Binds
+    abstract fun bingDatabaseRepository(databaseRepositoryImp: DatabaseRepositoryImp): DatabaseRepository
+}

app/src/main/java/com/navinfo/volvo/di/module/NetworkDataModule.kt

@@ -1,15 +0,0 @@
-package com.navinfo.volvo.di.module
-
-import com.navinfo.volvo.repository.NetworkDataSource
-import com.navinfo.volvo.repository.NetworkDataSourceImp
-import dagger.Binds
-import dagger.Module
-import dagger.hilt.InstallIn
-import dagger.hilt.components.SingletonComponent
-
-@InstallIn(SingletonComponent::class)
-@Module
-abstract class NetworkDataModule {
-    @Binds
-    abstract fun bindNetworkData(networkDataSourceImp: NetworkDataSourceImp): NetworkDataSource
-}

app/src/main/java/com/navinfo/volvo/di/module/NetworkRepositoryModule.kt

@@ -0,0 +1,15 @@
+package com.navinfo.volvo.di.module
+
+import com.navinfo.volvo.repository.network.NetworkRepository
+import com.navinfo.volvo.repository.network.NetworkRepositoryImp
+import dagger.Binds
+import dagger.Module
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+
+@InstallIn(SingletonComponent::class)
+@Module
+abstract class NetworkRepositoryModule {
+    @Binds
+    abstract fun bindNetworkRepository(networkRepositoryImp: NetworkRepositoryImp): NetworkRepository
+}

app/src/main/java/com/navinfo/volvo/di/module/NetworkUtilModule.kt

@@ -4,7 +4,7 @@ import android.app.Application
 import android.content.Context
 import com.google.gson.Gson
 import com.navinfo.volvo.Constant
-import com.navinfo.volvo.repository.service.NetworkService
+import com.navinfo.volvo.repository.network.NetworkService
 import com.navinfo.volvo.tools.GsonUtil
 import dagger.Lazy
 import dagger.Module
@@ -15,7 +15,6 @@ import okhttp3.OkHttpClient
 import okhttp3.logging.HttpLoggingInterceptor
 import retrofit2.Retrofit
 import retrofit2.converter.gson.GsonConverterFactory
-import java.util.concurrent.TimeUnit
 import javax.inject.Singleton
 
 
@@ -101,4 +100,5 @@ class NetworkUtilModule {
     fun provideNetworkService(retrofit: Retrofit): NetworkService {
         return retrofit.create(NetworkService::class.java)
     }
+
 }

app/src/main/java/com/navinfo/volvo/di/module/ViewModelModule.kt

@@ -3,8 +3,9 @@ package com.navinfo.volvo.di.module
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.ViewModelProvider
 import com.navinfo.volvo.di.key.ViewModelKey
-import com.navinfo.volvo.ui.fragments.home.MessageViewModel
+import com.navinfo.volvo.ui.fragments.home.HomeViewModel
 import com.navinfo.volvo.ui.fragments.login.LoginViewModel
+import com.navinfo.volvo.ui.fragments.message.ObtainMessageViewModel
 import dagger.Binds
 import dagger.Module
 import dagger.hilt.InstallIn
@@ -25,6 +26,11 @@ abstract class ViewModelModule {
 
     @IntoMap
     @Binds
-    @ViewModelKey(MessageViewModel::class)
+    @ViewModelKey(HomeViewModel::class)
-    abstract fun bindMessageFragmentViewModel(viewModel: MessageViewModel): ViewModel
+    abstract fun bindMessageFragmentViewModel(viewModel: HomeViewModel): ViewModel
+
+    @IntoMap
+    @Binds
+    @ViewModelKey(ObtainMessageViewModel::class)
+    abstract fun bindObtainMessageFragmentViewModel(viewModel: ObtainMessageViewModel): ViewModel
 }

app/src/main/java/com/navinfo/volvo/repository/database/DatabaseRepository.kt

@@ -0,0 +1,12 @@
+package com.navinfo.volvo.repository.database
+
+import androidx.paging.PagingData
+import com.navinfo.volvo.database.entity.GreetingMessage
+import kotlinx.coroutines.flow.Flow
+
+/**
+ * 数据库操作接口
+ */
+interface DatabaseRepository {
+    fun getMessageByPaging(): Flow<PagingData<GreetingMessage>>
+}

app/src/main/java/com/navinfo/volvo/repository/database/DatabaseRepositoryImp.kt

@@ -0,0 +1,23 @@
+package com.navinfo.volvo.repository.database
+
+import androidx.paging.Pager
+import androidx.paging.PagingConfig
+import androidx.paging.PagingData
+import com.navinfo.volvo.database.dao.GreetingMessageDao
+import com.navinfo.volvo.database.entity.GreetingMessage
+import kotlinx.coroutines.flow.Flow
+import javax.inject.Inject
+
+class DatabaseRepositoryImp @Inject constructor(
+    private val messageDao: GreetingMessageDao
+) : DatabaseRepository {
+    companion object {
+        const val PAGE_SIZE = 20
+    }
+
+    override fun getMessageByPaging(): Flow<PagingData<GreetingMessage>> {
+        return Pager(PagingConfig(PAGE_SIZE)) {
+            messageDao.findAllByDataSource()
+        }.flow
+    }
+}

app/src/main/java/com/navinfo/volvo/repository/network/NetworkRepository.kt

@@ -1,10 +1,13 @@
-package com.navinfo.volvo.repository
+package com.navinfo.volvo.repository.network
 
 import com.navinfo.volvo.http.DefaultResponse
 import com.navinfo.volvo.model.messagelist.NetworkMessageListPost
 import com.navinfo.volvo.model.messagelist.NetworkMessageListResponse
 import com.navinfo.volvo.util.NetResult
 
-interface NetworkDataSource  {
+/**
+ * 网络访问接口
+ */
+interface NetworkRepository  {
     suspend fun getCardList(message: NetworkMessageListPost): NetResult<DefaultResponse<NetworkMessageListResponse>>
 }

app/src/main/java/com/navinfo/volvo/repository/network/NetworkRepositoryImp.kt

@@ -1,13 +1,10 @@
-package com.navinfo.volvo.repository
+package com.navinfo.volvo.repository.network
 
-import com.navinfo.volvo.database.AppDatabase
 import com.navinfo.volvo.database.dao.GreetingMessageDao
 import com.navinfo.volvo.di.scope.IoDispatcher
-import com.navinfo.volvo.database.entity.GreetingMessage
 import com.navinfo.volvo.http.DefaultResponse
 import com.navinfo.volvo.model.messagelist.NetworkMessageListPost
 import com.navinfo.volvo.model.messagelist.NetworkMessageListResponse
-import com.navinfo.volvo.repository.service.NetworkService
 import com.navinfo.volvo.tools.GsonUtil
 import com.navinfo.volvo.util.NetResult
 import kotlinx.coroutines.CoroutineDispatcher
@@ -17,11 +14,11 @@ import okhttp3.RequestBody.Companion.toRequestBody
 import javax.inject.Inject
 
 
-class NetworkDataSourceImp @Inject constructor(
+class NetworkRepositoryImp @Inject constructor(
     private val netWorkService: NetworkService,
     private val messageDao: GreetingMessageDao,
     @IoDispatcher private val ioDispatcher: CoroutineDispatcher
-) : NetworkDataSource {
+) : NetworkRepository {
 
     override suspend fun getCardList(message: NetworkMessageListPost): NetResult<DefaultResponse<NetworkMessageListResponse>> =
         withContext(ioDispatcher) {
@@ -31,9 +28,7 @@ class NetworkDataSourceImp @Inject constructor(
                 val result = netWorkService.queryCardListByApp(stringBody)
                 if (result.isSuccessful) {
                     val body = result.body()
-                    val list: MutableList<GreetingMessage> =
+                    messageDao.insert(body!!.data!!.rows)
-                        listOf(body!!.data!!.rows) as MutableList<GreetingMessage>
-                    messageDao.insert(*list.map { it }.toTypedArray())
                     NetResult.Success(body)
                 } else {
                     NetResult.Success(null)

app/src/main/java/com/navinfo/volvo/repository/network/NetworkService.kt

@@ -1,4 +1,4 @@
-package com.navinfo.volvo.repository.service
+package com.navinfo.volvo.repository.network
 
 import com.navinfo.volvo.http.DefaultResponse
 import com.navinfo.volvo.model.messagelist.NetworkMessageListResponse

app/src/main/java/com/navinfo/volvo/ui/MainActivity.kt

@@ -1,7 +1,6 @@
 package com.navinfo.volvo.ui
 
 import android.content.DialogInterface
-import android.content.Intent
 import android.os.Bundle
 import android.view.View
 import android.widget.Toast
@@ -85,13 +84,13 @@ class MainActivity : AppCompatActivity() {
         val navController = findNavController(R.id.nav_host_fragment_activity_main)
         val appBarConfiguration = AppBarConfiguration(
             setOf(
-                R.id.navigation_message, R.id.navigation_dashboard, R.id.navigation_notifications,
+                R.id.navigation_home, R.id.navigation_dashboard, R.id.navigation_notifications,
             )
         )
         setupActionBarWithNavController(navController, appBarConfiguration)
         navView.setupWithNavController(navController)
         navController.addOnDestinationChangedListener { controller, destination, arguments ->
-            if (destination.id == R.id.navigation_message
+            if (destination.id == R.id.navigation_home
                 || destination.id == R.id.navigation_dashboard
                 || destination.id == R.id.navigation_notifications
                 || destination.id == R.id.navigation_obtain_message

app/src/main/java/com/navinfo/volvo/ui/adapter/MessageAdapter.kt

@@ -1,54 +0,0 @@
-package com.navinfo.volvo.ui.adapter
-
-import android.view.LayoutInflater
-import android.view.View
-import android.view.ViewGroup
-import android.widget.ImageView
-import android.widget.TextView
-import androidx.recyclerview.widget.RecyclerView
-import com.navinfo.volvo.R
-import com.navinfo.volvo.database.entity.GreetingMessage
-
-class MessageAdapter : RecyclerView.Adapter<MessageAdapter.MyViewHolder>() {
-
-    var itemList: MutableList<GreetingMessage> = mutableListOf()
-
-    fun addItem(message: GreetingMessage) {
-        itemList.add(message)
-        notifyItemInserted(itemList.size - 1)
-    }
-
-    fun setItem(messageList: MutableList<GreetingMessage>){
-        itemList = messageList
-        notifyDataSetChanged()
-    }
-
-    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {
-        val view =
-            LayoutInflater.from(parent.context).inflate(R.layout.adapter_message, parent, false)
-        var viewHolder = MyViewHolder(view)
-        viewHolder.itemView.setOnClickListener {
-
-        }
-        return viewHolder
-    }
-
-    override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
-        val message = itemList[position]
-        holder.toName.text = message.toWho
-        holder.messageText.text = message.name
-        holder.sendTime.text = message.sendDate
-    }
-
-    override fun getItemCount(): Int {
-        return itemList.size
-    }
-
-    inner class MyViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
-        var image: ImageView = itemView.findViewById(R.id.message_head_icon)
-        var toName: TextView = itemView.findViewById(R.id.message_to_username)
-        var sendTime: TextView = itemView.findViewById(R.id.message_send_time)
-        var status: TextView = itemView.findViewById(R.id.message_status)
-        var messageText: TextView = itemView.findViewById(R.id.message_text)
-    }
-}

app/src/main/java/com/navinfo/volvo/ui/fragments/home/HomeAdapter.kt

@@ -0,0 +1,81 @@
+package com.navinfo.volvo.ui.fragments.home
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ImageView
+import android.widget.TextView
+import androidx.databinding.DataBindingUtil
+import androidx.fragment.app.Fragment
+import androidx.paging.PagingDataAdapter
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.RecyclerView
+import com.bumptech.glide.Glide
+import com.navinfo.volvo.R
+import com.navinfo.volvo.database.entity.GreetingMessage
+import com.navinfo.volvo.databinding.AdapterHomeBinding
+
+class HomeAdapter(fragment: Fragment) :
+    PagingDataAdapter<GreetingMessage, HomeAdapter.MyViewHolder>(DiffCallback()) {
+
+    val fragment = fragment
+//    var itemList = ArrayList<GreetingMessage>()
+//
+//    fun addItem(message: GreetingMessage) {
+//        itemList.add(message)
+//        notifyItemInserted(itemList.size - 1)
+//    }
+//
+//    fun setItems(messageList: List<GreetingMessage>) {
+//        itemList.clear()
+//        itemList.addAll(messageList)
+//        notifyDataSetChanged()
+//    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {
+        val mDataBinding: AdapterHomeBinding =
+            DataBindingUtil.inflate(
+                LayoutInflater.from(fragment.context),
+                R.layout.adapter_home,
+                parent,
+                false
+            )
+        return MyViewHolder(mDataBinding)
+    }
+
+    override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
+        holder.onBind(position)
+    }
+
+//    override fun getItemCount(): Int {
+//        return itemList.size
+//    }
+
+    inner class MyViewHolder(private val mDataBinding: AdapterHomeBinding) :
+        RecyclerView.ViewHolder(mDataBinding.root) {
+        fun onBind(position: Int) {
+            var row = getItem(position)
+            mDataBinding.greetingMessage = row
+            Glide.with(fragment)
+                .asBitmap().fitCenter()
+                .load(row!!.imageUrl)
+                .placeholder(R.mipmap.volvo_logo_small)
+                .error(R.mipmap.volvo_logo_small)
+                .into(mDataBinding.messageHeadIcon)
+        }
+
+    }
+
+    class DiffCallback : DiffUtil.ItemCallback<GreetingMessage>() {
+        override fun areItemsTheSame(oldItem: GreetingMessage, newItem: GreetingMessage): Boolean {
+            return oldItem.uuid == newItem.uuid
+        }
+
+        override fun areContentsTheSame(
+            oldItem: GreetingMessage,
+            newItem: GreetingMessage
+        ): Boolean {
+            return oldItem == newItem
+        }
+    }
+}

app/src/main/java/com/navinfo/volvo/ui/fragments/home/HomeFragment.kt

@@ -4,50 +4,44 @@ import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.databinding.DataBindingUtil
 import androidx.fragment.app.viewModels
-import androidx.lifecycle.Observer
+import androidx.lifecycle.lifecycleScope
-import androidx.lifecycle.ViewModelProvider
 import androidx.recyclerview.widget.DividerItemDecoration
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.navinfo.volvo.R
 import com.navinfo.volvo.databinding.FragmentHomeBinding
 import com.navinfo.volvo.tools.DisplayUtil
 import com.navinfo.volvo.ui.BaseFragment
-import com.navinfo.volvo.ui.adapter.MessageAdapter
-import com.navinfo.volvo.ui.fragments.message.ObtainMessageViewModel
 import com.yanzhenjie.recyclerview.*
 import dagger.hilt.android.AndroidEntryPoint
+import kotlinx.coroutines.flow.collectLatest
+import kotlinx.coroutines.launch
 
 @AndroidEntryPoint
-class MessageFragment : BaseFragment(), OnItemClickListener, OnItemMenuClickListener {
+class HomeFragment : BaseFragment(), OnItemClickListener, OnItemMenuClickListener {
 
-    private var _binding: FragmentHomeBinding? = null
+    private val viewModel by viewModels<HomeViewModel> { viewModelFactoryProvider }
 
-    // This property is only valid between onCreateView and
+    private lateinit var messageAdapter: HomeAdapter
-    // onDestroyView.
+    private lateinit var mDataBinding: FragmentHomeBinding
-    private val binding get() = _binding!!
-
-    private val viewModel by viewModels<MessageViewModel> { viewModelFactoryProvider }
 
     override fun onCreateView(
         inflater: LayoutInflater,
         container: ViewGroup?,
         savedInstanceState: Bundle?
     ): View {
-//        val homeViewModel =
+        mDataBinding = DataBindingUtil.inflate(inflater, R.layout.fragment_home, container, false)
-//            ViewModelProvider(this)[MessageViewModel::class.java]
+        mDataBinding.lifecycleOwner = this
-//        val obtainMessageViewModel =
-//            ViewModelProvider(requireActivity()).get(ObtainMessageViewModel::class.java)
-
-        _binding = FragmentHomeBinding.inflate(inflater, container, false)
-        val root: View = binding.root
         initView()
-        return root
+        return mDataBinding.root
     }
 
 
     private fun initView() {
-        val recyclerview: SwipeRecyclerView = binding.homeMessageRecyclerview
+        mDataBinding.homeViewModel = viewModel
+        messageAdapter = HomeAdapter(this)
+        val recyclerview: SwipeRecyclerView = mDataBinding.homeRecyclerview
         recyclerview.adapter = null //先设置null，否则会报错
         //创建菜单选项
         //注意：使用滑动菜单不能开启滑动删除，否则只有滑动删除没有滑动菜单
@@ -71,34 +65,37 @@ class MessageFragment : BaseFragment(), OnItemClickListener, OnItemMenuClickList
                 rightMenu.addMenuItem(shareItem)
             }
         val layoutManager = LinearLayoutManager(context)
-        val adapter = MessageAdapter()
+
         recyclerview.layoutManager = layoutManager
         recyclerview.addItemDecoration(DividerItemDecoration(context, layoutManager.orientation))
         recyclerview.setSwipeMenuCreator(mSwipeMenuCreator)
         recyclerview.setOnItemClickListener(this)
-        recyclerview.useDefaultLoadMore()
+//        recyclerview.useDefaultLoadMore()
-        recyclerview.setLoadMoreListener {
+//        recyclerview.setLoadMoreListener {
-
+//
+//        }
+        lifecycleScope.launch {
+            viewModel.messageList.collectLatest {
+                messageAdapter.submitData(it)
+            }
         }
-        recyclerview.adapter = adapter
+//        messageAdapter.withLoadStateFooter(
-//        homeViewModel.getMessageList().observe(viewLifecycleOwner, Observer { contacts ->
+//            footer = RecLoadStateAdapter { messageAdapter.retry() }
-//            adapter.setItem(contacts)
+//        )
-//        })
+
+//        messageAdapter.withLoadStateHeader()
+        recyclerview.adapter = messageAdapter
+
     }
 
     override fun onStart() {
         super.onStart()
-        getMessageList()
+        viewModel.getNetMessageList()
-    }
-
-    private fun getMessageList() {
-        viewModel.getMessageList()
     }
 
 
     override fun onDestroyView() {
         super.onDestroyView()
-        _binding = null
     }
 
     override fun onItemClick(view: View?, adapterPosition: Int) {

app/src/main/java/com/navinfo/volvo/ui/fragments/home/HomeViewModel.kt

@@ -0,0 +1,57 @@
+package com.navinfo.volvo.ui.fragments.home
+
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import androidx.paging.PagingData
+import com.navinfo.volvo.database.dao.GreetingMessageDao
+import com.navinfo.volvo.database.entity.GreetingMessage
+import com.navinfo.volvo.model.messagelist.NetworkMessageListPost
+import com.navinfo.volvo.repository.database.DatabaseRepository
+import com.navinfo.volvo.repository.network.NetworkRepository
+import com.navinfo.volvo.util.NetResult
+import com.navinfo.volvo.util.asLiveData
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+class HomeViewModel @Inject constructor(
+    private val netRepository: NetworkRepository,
+    private val dataRepository: DatabaseRepository
+) : ViewModel() {
+
+    private val _isLoading = MutableLiveData<Boolean>()
+    val isLoading = _isLoading.asLiveData()
+
+//    private val _messageList = MutableLiveData<List<GreetingMessage>>()
+//    val messageList = _messageList.asLiveData()
+
+
+    val messageList: Flow<PagingData<GreetingMessage>>
+        get() = dataRepository.getMessageByPaging()
+
+
+    fun getNetMessageList() {
+        _isLoading.postValue(true)
+        viewModelScope.launch {
+            val messagePost = NetworkMessageListPost(who = "", toWho = "")
+            when (val result = netRepository.getCardList(messagePost)) {
+                is NetResult.Success -> {
+                    _isLoading.value = false
+//                    if (result.data != null) {
+//                        val list = (result.data.data as NetworkMessageListResponse).rows
+//                        _messageList.value = list
+//                    }
+                }
+
+                is NetResult.Error -> {
+                    _isLoading.value = false
+                }
+                is NetResult.Loading -> {
+                    _isLoading.postValue(true)
+                }
+            }
+        }
+    }
+
+}

app/src/main/java/com/navinfo/volvo/ui/fragments/home/MessageViewModel.kt

@@ -1,48 +0,0 @@
-package com.navinfo.volvo.ui.fragments.home
-
-import androidx.lifecycle.MutableLiveData
-import androidx.lifecycle.ViewModel
-import androidx.lifecycle.viewModelScope
-import com.navinfo.volvo.database.entity.GreetingMessage
-import com.navinfo.volvo.model.messagelist.NetworkMessageListPost
-import com.navinfo.volvo.model.messagelist.NetworkMessageListResponse
-import com.navinfo.volvo.repository.NetworkDataSource
-import com.navinfo.volvo.util.NetResult
-import com.navinfo.volvo.util.asLiveData
-import kotlinx.coroutines.launch
-import javax.inject.Inject
-
-class MessageViewModel @Inject constructor(
-    private val repository: NetworkDataSource
-) : ViewModel() {
-
-    private val _isLoading = MutableLiveData<Boolean>()
-    val isLoading = _isLoading.asLiveData()
-
-    private val _messageList = MutableLiveData<List<GreetingMessage>>()
-    val messageList = _messageList.asLiveData()
-
-    fun getMessageList() {
-        _isLoading.postValue(true)
-        viewModelScope.launch {
-            val messagePost = NetworkMessageListPost(who = "北京测试", toWho = "volvo测试")
-            when (val result = repository.getCardList(messagePost)) {
-                is NetResult.Success -> {
-                    _isLoading.value = false
-                    if (result.data != null) {
-                        val list = (result.data.data as NetworkMessageListResponse).rows
-                        _messageList.value = list
-                    }
-                }
-
-                is NetResult.Error -> {
-                    _isLoading.value = false
-                }
-                is NetResult.Loading -> {
-                    _isLoading.postValue(true)
-                }
-            }
-        }
-    }
-
-}

app/src/main/java/com/navinfo/volvo/ui/fragments/home/RecLoadStateAdapter.kt

@@ -0,0 +1,51 @@
+//package com.navinfo.volvo.ui.fragments.home
+//
+//import android.view.LayoutInflater
+//import android.view.View
+//import android.view.ViewGroup
+//import androidx.core.view.isVisible
+//import androidx.paging.LoadState
+//import androidx.paging.LoadStateAdapter
+//import androidx.recyclerview.widget.RecyclerView
+//import com.example.picsapp.R
+//import com.example.picsapp.databinding.LoadStateViewBinding
+//
+//class RecLoadStateAdapter(
+//    private val retry: () -> Unit
+//) : LoadStateAdapter<RecLoadStateAdapter.LoadStateViewHolder>() {
+//
+//    override fun onCreateViewHolder(parent: ViewGroup, loadState: LoadState): LoadStateViewHolder {
+//
+//        val binding = LoadStateViewBinding
+//            .inflate(LayoutInflater.from(parent.context), parent, false)
+//
+//        return LoadStateViewHolder(binding)
+//    }
+//
+//    override fun onBindViewHolder(holder: LoadStateViewHolder, loadState: LoadState) {
+//        holder.onBind(loadState)
+//
+//    }
+//
+//
+//
+//    inner class LoadStateViewHolder(private val binding: LoadStateViewBinding) : RecyclerView.ViewHolder(binding.root){
+//        fun onBind(loadState: LoadState) {
+//            val progress = binding.loadStateProgress
+//            val btnRetry = binding.loadStateRetry
+//            val txtErrorMessage = binding.loadStateErrorMessage
+//
+//            btnRetry.isVisible = loadState !is LoadState.Loading
+//            txtErrorMessage.isVisible = loadState !is LoadState.Loading
+//            progress.isVisible = loadState is LoadState.Loading
+//
+//            if (loadState is LoadState.Error){
+//                txtErrorMessage.text = loadState.error.localizedMessage
+//            }
+//
+//            btnRetry.setOnClickListener {
+//                retry.invoke()
+//            }
+//        }
+//    }
+//}

app/src/main/res/layout/adapter_home.xml

@@ -0,0 +1,67 @@
+<?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">
+
+    <data>
+
+        <import type="android.view.View" />
+
+        <variable
+            name="greetingMessage"
+            type="com.navinfo.volvo.database.entity.GreetingMessage" />
+    </data>
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+
+        <ImageView
+            android:id="@+id/message_head_icon"
+            android:layout_width="60dp"
+            android:layout_height="60dp"
+            android:layout_marginLeft="8dp"
+            android:src="@mipmap/volvo_logo_small"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent" />
+
+        <TextView
+            android:id="@+id/message_to_who"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginLeft="8dp"
+            android:ellipsize="end"
+            android:textSize="16sp"
+            android:textStyle="bold"
+            app:layout_constraintLeft_toRightOf="@id/message_head_icon"
+            app:layout_constraintTop_toTopOf="@id/message_head_icon"
+            android:text="@{greetingMessage.toWho,default=发送对象}" />
+
+        <TextView
+            android:id="@+id/message_text"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginLeft="8dp"
+            android:text="@{greetingMessage.name,default=消息内容}"
+            app:layout_constraintBottom_toBottomOf="@id/message_head_icon"
+            app:layout_constraintLeft_toRightOf="@id/message_head_icon" />
+
+        <TextView
+            android:id="@+id/message_send_time"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginRight="8dp"
+            android:text="@{greetingMessage.sendDate,default=发送时间}"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintTop_toTopOf="@id/message_head_icon" />
+
+        <TextView
+            android:id="@+id/message_status"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginLeft="8dp"
+            android:text="@{greetingMessage.status,default=消息状态}"
+            app:layout_constraintBottom_toBottomOf="@id/message_head_icon"
+            app:layout_constraintEnd_toEndOf="parent" />
+    </androidx.constraintlayout.widget.ConstraintLayout>
+</layout>

app/src/main/res/layout/adapter_message.xml

@@ -1,54 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content">
-
-    <ImageView
-        android:id="@+id/message_head_icon"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginLeft="8dp"
-        android:src="@mipmap/volvo_logo_small"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
-
-    <TextView
-        android:id="@+id/message_to_username"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginLeft="8dp"
-        android:text="问候对象"
-        android:ellipsize="end"
-        android:textSize="16sp"
-        android:textStyle="bold"
-        app:layout_constraintLeft_toRightOf="@id/message_head_icon"
-        app:layout_constraintTop_toTopOf="@id/message_head_icon" />
-
-    <TextView
-        android:id="@+id/message_text"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginLeft="8dp"
-        android:text="信息内容"
-        app:layout_constraintBottom_toBottomOf="@id/message_head_icon"
-        app:layout_constraintLeft_toRightOf="@id/message_head_icon" />
-    <TextView
-        android:id="@+id/message_send_time"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginRight="8dp"
-        android:text="日期"
-        app:layout_constraintTop_toTopOf="@id/message_head_icon"
-        app:layout_constraintEnd_toEndOf="parent"
-        />
-    <TextView
-        android:id="@+id/message_status"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginLeft="8dp"
-        android:text="状态"
-        app:layout_constraintBottom_toBottomOf="@id/message_head_icon"
-        app:layout_constraintEnd_toEndOf="parent" />
-</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/fragment_home.xml

@@ -1,10 +1,20 @@
 <?xml version="1.0" encoding="utf-8"?>
-<com.yanzhenjie.recyclerview.SwipeRecyclerView
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:id="@+id/home_message_recyclerview"
-    xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
+    xmlns:tools="http://schemas.android.com/tools">
-    android:layout_width="match_parent"
+
-    android:layout_height="match_parent"
+    <data>
-    tools:context=".ui.fragments.home.MessageFragment">
+
-</com.yanzhenjie.recyclerview.SwipeRecyclerView>
+        <import type="android.view.View" />
+
+        <variable
+            name="HomeViewModel"
+            type="com.navinfo.volvo.ui.fragments.home.HomeViewModel" />
+    </data>
+
+    <com.yanzhenjie.recyclerview.SwipeRecyclerView
+        android:id="@+id/home_recyclerview"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        tools:context=".ui.fragments.home.HomeFragment" />
+</layout>

app/src/main/res/layout/fragment_login.xml

@@ -11,7 +11,7 @@
         android:id="@+id/login_fragment_logo"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:src="@mipmap/ic_launcher"
+        android:src="@mipmap/volvo_logo_small"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"

app/src/main/res/menu/bottom_nav_menu.xml

@@ -2,7 +2,7 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android">
 
     <item
-        android:id="@+id/navigation_message"
+        android:id="@+id/navigation_home"
         android:icon="@drawable/ic_home_black_24dp"
         android:title="@string/title_home" />
     <item

app/src/main/res/navigation/mobile_navigation.xml

@@ -12,7 +12,7 @@
         tools:layout="@layout/fragment_login">
         <action
             android:id="@+id/action_login_to_home"
-            app:destination="@id/navigation_message"
+            app:destination="@id/navigation_home"
             app:enterAnim="@anim/from_left"
             app:exitAnim="@anim/to_right"
             app:popEnterAnim="@anim/from_right"
@@ -21,8 +21,8 @@
             app:popUpToInclusive="true" />
     </fragment>
     <fragment
-        android:id="@+id/navigation_message"
+        android:id="@+id/navigation_home"
-        android:name="com.navinfo.volvo.ui.fragments.home.MessageFragment"
+        android:name="com.navinfo.volvo.ui.fragments.home.HomeFragment"
         android:label="@string/title_home"
         tools:layout="@layout/fragment_home"></fragment>