fix: 1

cloudroam

2025-03-12 32b40371a31b3984e01f5a072e8e9c7a1e6acc2b

 app/src/main/java/com/example/firstapp/ui/home/HomeFragment.kt

@@ -1,16 +1,22 @@
package com.example.firstapp.ui.home

import android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent
import android.content.IntentFilter
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import androidx.core.content.ContextCompat
import androidx.fragment.app.Fragment
import androidx.lifecycle.ViewModelProvider
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import com.example.firstapp.R
import com.example.firstapp.adapter.MyAdapter
import com.example.firstapp.activity.PickupActivity
import com.example.firstapp.adapter.ExpressAdapter
import com.example.firstapp.core.Core
import com.example.firstapp.databinding.FragmentHomeBinding

@@ -23,45 +29,118 @@
    private val binding get() = _binding!!

    private lateinit var homeViewModel: HomeViewModel
    private lateinit var adapter: MyAdapter
    private lateinit var expressAdapter: ExpressAdapter
    //    private lateinit var financeAdapter: FinanceAdapter
//    private lateinit var memorialAdapter: MemorialAdapter
    private lateinit var dataUpdateReceiver: BroadcastReceiver


    //onCreateView这个方法创建后被调用，通常是初始化视图组件和观察者
    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {
        homeViewModel =
            ViewModelProvider(this).get(HomeViewModel::class.java)

        _binding = FragmentHomeBinding.inflate(inflater, container, false)
        val root: View = binding.root
        return binding.root
    }

//        val textView: TextView = binding.textHome
//        homeViewModel.text.observe(viewLifecycleOwner) {
//            textView.text = it
//        }
    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        //通过 ViewModelProvider 获取 HomeViewModel 的实例，以便在视图中使用。
        homeViewModel = ViewModelProvider(this).get(HomeViewModel::class.java)

        // 初始化适配器
        adapter = MyAdapter()
        //调用这个方法来设置 RecyclerView用于设置 RecyclerView 的布局和适配器。
        setupRecyclerViews()
        //调用这个方法来观察 ViewModel 中的数据变化
        observeViewModelData()
    }

        // 获取数据
//        val codeList = Core.code.getAllDesc()
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        // 使用 binding 来访问 RecyclerView
        val recyclerView: RecyclerView = binding.recyclerView
        recyclerView.layoutManager = LinearLayoutManager(requireContext()) // 使用 requireContext() 获取上下文
        recyclerView.adapter = adapter
        // 创建广播接收器
        dataUpdateReceiver = object : BroadcastReceiver() {
            override fun onReceive(context: Context, intent: Intent) {
                if (intent.action == "com.example.firstapp.DATA_UPDATED") {
                    // 收到数据更新广播时重新加载数据
                    homeViewModel.loadExpressData()
                }
            }
        }
    }

        // 观察 LiveData，当数据发生变化时，更新 RecyclerView 的内容
        homeViewModel.codeList.observe(viewLifecycleOwner) { codeList ->
            adapter.submitList(codeList) // 更新 RecyclerView 的数据
            // 滚动到顶部
            recyclerView.scrollToPosition(0)
    private fun setupRecyclerViews() {
        binding.expressRecycler.apply {
            layoutManager = LinearLayoutManager(context)
            expressAdapter = ExpressAdapter()
            adapter = expressAdapter

            // 设置点击监听
            expressAdapter.setOnPackageClickListener { group, pack ->
                // 跳转到取件页面
                val intent = Intent(requireContext(), PickupActivity::class.java).apply {
                    putExtra("station_name", group.stationName)
                    putExtra("company", pack.company)
                }
                startActivity(intent)
            }
        }

        return root
//        // 财务列表
//        binding.financeRecycler.apply {
//            layoutManager = LinearLayoutManager(context)
//            financeAdapter = FinanceAdapter()
//            adapter = financeAdapter
//        }
//
//        // 纪念日列表
//        binding.memorialRecycler.apply {
//            layoutManager = LinearLayoutManager(context)
//            memorialAdapter = MemorialAdapter()
//            adapter = memorialAdapter
//        }
    }

    //这个方法用于观察 homeViewModel 中的 expressItems 数据。
    private fun observeViewModelData() {
        //当 expressItems 数据发生变化时，更新 RecyclerView 的数据。
        homeViewModel.expressItems.observe(viewLifecycleOwner) { items ->
            //将新的数据列表提交给适配器，以更新 RecyclerView 的显示内容。
            expressAdapter.submitList(items)
        }

//        homeViewModel.financeItems.observe(viewLifecycleOwner) { items ->
//            financeAdapter.submitList(items)
//        }
//
//        homeViewModel.memorialItems.observe(viewLifecycleOwner) { items ->
//            memorialAdapter.submitList(items)
//        }
    }

    override fun onResume() {
        super.onResume()
        // 使用 ContextCompat 注册广播接收器，并指定 RECEIVER_NOT_EXPORTED 标志
        ContextCompat.registerReceiver(
            requireContext(),
            dataUpdateReceiver,
            IntentFilter("com.example.firstapp.DATA_UPDATED"),
            ContextCompat.RECEIVER_NOT_EXPORTED
        )
        // 加载数据
        homeViewModel.loadExpressData()
    }

    override fun onPause() {
        super.onPause()
        try {
            // 取消注册广播接收器
            requireContext().unregisterReceiver(dataUpdateReceiver)
        } catch (e: Exception) {
            // 处理可能的异常
            e.printStackTrace()
        }
    }

    override fun onDestroyView() {