如何解决如何修复 Android Studio 中的底部导航栏 + recyclerview 问题?
我正在尝试将数据从服务器获取到 recyclerView 并且它在第一次加载时正常工作,但是一旦我移动到另一个片段,所有片段都停止工作,如下所示
这是第一个片段:
class MainFragmentAdapter : Fragment() {
private lateinit var dashboardviewmodel: MainModel
val fullStoresList : MutableList<FullStoresModel> = ArrayList()
private lateinit var mContext : Context
override fun onAttach(context: Context) {
super.onAttach(context)
this.mContext = context
}
override fun onCreateView(
inflater: LayoutInflater,container: ViewGroup?,savedInstanceState: Bundle?
): View? {
dashboardviewmodel =
viewmodelProvider(this).get(MainModel::class.java)
val root = inflater.inflate(R.layout.main_fragment,container,false)
/**
* Check Internet Connection
*/
root.firstStoreTV.visibility = View.GONE
if (!isConnected(mContext)){
wifiManager = mContext.applicationContext.getSystemService(Context.WIFI_SERVICE) as WifiManager
root.no_store.visibility = View.GONE
root.firstStoreTV.visibility = View.GONE
root.tryAgain.visibility = View.VISIBLE
root.imageView.visibility = View.VISIBLE
wifiManager!!.isWifiEnabled = true
}else{
if (fullStoresList.isEmpty()){
root.no_store.visibility = View.VISIBLE
root.firstStoreTV.visibility = View.VISIBLE
root.storesRV.visibility = View.GONE
root.yourStoresTV.visibility = View.GONE
}else{
root.storesRV.visibility = View.VISIBLE
root.yourStoresTV.visibility = View.VISIBLE
root.no_store.visibility = View.GONE
root.firstStoreTV.visibility = View.GONE
}
root.tryAgain.visibility = View.GONE
root.imageView.visibility = View.GONE
}
return root
}
override fun onViewCreated(view: View,savedInstanceState: Bundle?) {
super.onViewCreated(view,savedInstanceState)
/**
* Calling Data
*/
val progressBar = view.findViewById<ProgressBar>(R.id.progressBar)
getStoresDataByID(requireContext().applicationContext,progressBar!!,Sessions(requireContext().applicationContext).getToken()!!,object : CustomCallback {
override fun getStoreDataLists(
storesList: MutableList<StoresModel>,storesMenusList: MutableList<MenusModel>,storeratingsList: MutableList<ratingsModel>
) {
// Log.e("storesList",storesList.toString())
fullStoresList.clear()
for (i in 0 until storesList.size) {
var storerating = 0.0
var numberOfratings = 0
var menusNumber = 0
for (j in 0 until storeratingsList.size) {
if (storeratingsList[j].ratedItemId == storesList[i].restaurantId) {
numberOfratings++
storerating += storeratingsList[j].ratingValue!!
}
}
for (k in 0 until storesMenusList.size) {
if (storesMenusList[k].restaurantId == storesList[i].restaurantId) {
menusNumber++
}
}
if (numberOfratings != 0) {
storerating /= numberOfratings
}
val rate = String.format("%.1f",storerating)
fullStoresList.add(
FullStoresModel(
storesList[i].restaurantId,storesList[i].ownerId,storesList[i].restaurantName,storesList[i].restaurantPhone,storesList[i].restaurantType,storesList[i].nrc,storesList[i].nis,storesList[i].nif,storesList[i].workingDays,storesList[i].workingHours,storesList[i].storeImage,menusNumber,rate
)
)
}
val myRV = view.findViewById<RecyclerView>(R.id.storesRV)
val myOptionsAdapter = StoresAdapter(context,fullStoresList)
myRV!!.layoutManager = GridLayoutManager(context,1)
ViewCompat.setnestedScrollingEnabled(myRV,true)
myRV.scrollBarSize = 20
myRV.isverticalScrollBarEnabled = true
myRV.isScrollContainer = true
myRV.adapter = myOptionsAdapter
if (storesList.isNotEmpty()) {
view.storesRV.visibility = View.VISIBLE
view.yourStoresTV.visibility = View.VISIBLE
view.no_store.visibility = View.GONE
} else {
view.storesRV.visibility = View.GONE
view.yourStoresTV.visibility = View.GONE
view.no_store.visibility = View.VISIBLE
}
}
})
}
我正在使用函数 getStoresDataByID 从服务器获取数据 它工作正常,我注意到底部导航栏工作 如果 fullStoresList 为空,则正确
第一个片段在第一次使用时工作正常,但当我点击第二个项目时,所有片段都停止工作,屏幕将如上图所示。
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