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如何解决如何在设置片段中添加共享首选项并使用导航组件在 android kotlin 中的片段之间移动?

开发过程中遇到如何在设置片段中添加共享首选项并使用导航组件在 android kotlin 中的片段之间移动的问题如何解决?下面主要结合日常开发的经验,给出你关于如何在设置片段中添加共享首选项并使用导航组件在 android kotlin 中的片段之间移动的解决方法建议,希望对你解决如何在设置片段中添加共享首选项并使用导航组件在 android kotlin 中的片段之间移动有所启发或帮助;

我不知道如何在设置片段中添加共享首选项,也不知道如何使用 androID 导航组件在片段之间移动,用户可以在其中更改 API 键的“值”。这是我使用的 https://earthquake.usgs.gov/fdsnws/event/1/query?format=geoJson&orderby=time&minmag=5&limit=10 API。从 API 中,我想更改 @H_760_3@minmag 值,用户可以在设置片段中放置 @H_760_3@minmag 的任何值,结果应保存在共享首选项中,并且结果应显示在主活动中{ {3}}

如何在设置片段中添加共享首选项并使用导航组件在 android kotlin 中的片段之间移动

我正在使用 kotlin,改造并遵循 androID 架构组件

EarthquakeAPIservice.kt

    private const val BASE_URL = "https://earthquake.usgs.gov/fdsnws/"

// https://earthquake.usgs.gov/fdsnws/event/1/query?format=geoJson&orderby=time&minmag=5&limit=10
private val moshi = moshi.builder()
    .add(KotlinjsonAdapterFactory())
    .build()

private val retrofit = Retrofit.builder()
    .addConverterFactory(moshiConverterFactory.create(moshi))
    .baseUrl(BASE_URL)
    .build()

interface EarthquakeAPIservice {
    @GET("event/1/query?")
    suspend fun getJson (@query("minmag") minMagnitude : String,@query("format") formatted : String,@query("limit") limited: String,@query("orderby") orderBy : String) : EarthquakeResponse
}

object BookAPI {
    val retrofitservice : EarthquakeAPIservice by lazy { retrofit.create(EarthquakeAPIservice::class.java) }
}
@H_403_19@

地震响应.kt

    data class EarthquakeResponse( val features : Array<Feature> ?)

data class Feature( val propertIEs : PropertIEs)

data class PropertIEs(val mag : Double,val place : String,val time : Long)
@H_403_19@

概览片段

   class OvervIEwFragment : Fragment() {

     private val viewmodel: OvervIEwviewmodel by lazy {
        viewmodelProvIDer(this).get(OvervIEwviewmodel::class.java)
    }

    overrIDe fun onCreateVIEw(
        inflater: LayoutInflater,container: VIEwGroup?,savedInstanceState: Bundle?): VIEw? {

        val binding: FragmentOvervIEwBinding = DataBindingUtil.inflate(
            inflater,R.layout.fragment_overvIEw,container,falsE)
        binding.viewmodel = viewmodel
        binding.recycleList.adapter = RecyclervIEwAdapter()

        binding.lifecycleowner = this

        setHasOptionsMenu(true)
        return binding.root
    }

     overrIDe fun onCreateOptionsMenu(menu: Menu,inflater: MenuInflater) {
         super.onCreateOptionsMenu(menu,inflater)
         inflater?.inflate(R.menu.overflow_menu,menu)
     }

     overrIDe fun onoptionsItemSELEcted(item: MenuItem): Boolean {
         return NavigationUI.onNavDesTinationSELEcted(item,requireVIEw().findNavController())
                 || super.onoptionsItemSELEcted(item)
     }
}
@H_403_19@

概览视图模型

 class OvervIEwviewmodel : viewmodel() {
      lateinit var  minMagnitude : String
     lateinit var orderBy: String
     // Internally,we use a mutablelivedata,because we will be updating the List of MarsProperty
    // with new values
    private val _propertIEs = mutablelivedata<EarthquakeResponse> ()

    // The external liveData interface to the property is immutable,so only this class can modify
    val propertIEs: liveData<EarthquakeResponse>
        get() = _propertIEs
    init {
        getBookPropertIEs()
    }

    private fun getBookPropertIEs() {
        viewmodelScope.launch {
            try {
                _propertIEs.value = BookAPI.retrofitservice.getJson("2","geoJson","10","time")
            } catch (e : Exception) {
            }
        }
    }
}
@H_403_19@

RecyclervIEwAdapter.kt

 class RecyclervIEwAdapter() : listadapter<Feature,RecyclervIEwAdapter.EarthquakePropertyVIEwHolder>(DiffCallBACk()) {

    overrIDe fun onCreateVIEwHolder(parent: VIEwGroup,vIEwType: @R_489_10185@: EarthquakePropertyVIEwHolder {
        return EarthquakePropertyVIEwHolder.from(parent)
    }

    overrIDe fun onBindVIEwHolder(holder: EarthquakePropertyVIEwHolder,position: @R_489_10185@ {
        val item = getItem(position)
        holder.bind(item)
    }
    class EarthquakePropertyVIEwHolder private constructor(val binding: EarthquakeRawBinding) : RecyclerVIEw.VIEwHolder(binding.root) {
        fun bind(books: FeaturE) {
            binding.property = books
            binding.executePendingBindings()
        }
        companion object {
            fun from(parent: VIEwGroup): EarthquakePropertyVIEwHolder {
                val layoutInflater = LayoutInflater.from(parent.context)
                val vIEw = EarthquakeRawBinding.inflate(layoutInflater,parent,falsE)
                return EarthquakePropertyVIEwHolder(vIEw)
            }
        }
    }
}

class  DiffCallBACk : DiffUtil.ItemCallBACk<Feature>() {
    overrIDe fun areItemsTheSame(oldItem: Feature,newItem: FeaturE): Boolean {
        return oldItem === newItem
    }
    overrIDe fun areContentsTheSame(oldItem: Feature,newItem: FeaturE): Boolean {
        return oldItem == newItem

    }
}
@H_403_19@

BindingAdapter.kt

    @BindingAdapter("ListData")
fun bindRecyclerVIEw(recyclerVIEw: RecyclerVIEw,data: EarthquakeResponse?) {
    val adapter = recyclerVIEw.adapter as RecyclervIEwAdapter
    if (data != null) {
        adapter.submitList(data.features?.toList())
    }
}

@BindingAdapter("magnitude")
fun bindAuthor(textVIEw: TextVIEw,magname : DoublE) {
   val decimalFormat = decimalFormat("0.0")
    val formattedMagnitude = decimalFormat.format(magName)
    textVIEw.setText(formattedMagnitude.toString())
}

@BindingAdapter("place")
fun bindtitle(textVIEw: TextVIEw,titlePlace : String) {
    textVIEw.setText(titlePlacE)       
}

@BindingAdapter("time")
fun bindTime(textVIEw: TextVIEw,titleTime :Long) {
    val timeFormat = SimpleDateFormat("h:mm a")
    val formattedTime = timeFormat.format(titleTimE)
    textVIEw.setText(formattedTime.toString())
}

@BindingAdapter("date")
fun bindDate(textVIEw: TextVIEw,titleTime :Long) {
    val timeFormat = SimpleDateFormat("LLL dd,yyyy")
    val formattedDate = timeFormat.format(titleTimE)
    textVIEw.setText(formattedDate.toString())
}
@H_403_19@

主活动

 class MainActivity : AppCompatActivity() {

    private lateinit var navController: NavController
    overrIDe fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceStatE)
        setContentVIEw(R.layout.activity_main)
    }
}
@H_403_19@

activity_main.xml

 <relativeLayout androID:layout_wIDth="match_parent"
    androID:layout_height="match_parent"
    tools:context="com.example.kotlinearthquake.MainActivity"
    xmlns:tools="http://scheR_676_11845@as.androID.com/tools"
    xmlns:androID="http://scheR_676_11845@as.androID.com/apk/res/androID">

<fragment
    xmlns:app="http://scheR_676_11845@as.androID.com/apk/res-auto"
    androID:ID="@+ID/myNavHostFragment"
    androID:name="androIDx.navigation.fragment.NavHostFragment"
    androID:layout_wIDth="match_parent"
    androID:layout_height="match_parent"
    app:defaultNavHost="true"
    app:navGraph="@navigation/nav_graph"
    tools:ignore="MissingClass" />
</relativeLayout>
@H_403_19@

earthquake_raw.xml

    <layout
    xmlns:androID="http://scheR_676_11845@as.androID.com/apk/res/androID"
    xmlns:tools="http://scheR_676_11845@as.androID.com/tools"
    xmlns:app="http://scheR_676_11845@as.androID.com/apk/res-auto" >

    <data>
        <variable
            name="property"
            type="com.example.kotlinearthquake.network.Feature" />
    </data>

<linearLayout
    androID:ID="@+ID/container"
    androID:layout_wIDth="match_parent"
    androID:layout_height="150dp"
    androID:orIEntation="horizontal"
    androID:paddingStart="16dp"
    androID:paddingleft="16dp"
    androID:paddingend="16dp"
    androID:paddingRight="16dp">

    <TextVIEw
        androID:ID="@+ID/magnitude"
        androID:layout_wIDth="36dp"
        androID:layout_height="36dp"
        androID:layout_gravity="center_vertical"
        androID:BACkground="@drawable/magnitude_circle"
        androID:FontFamily="sans-serif-medium"
        androID:gravity="center"
        androID:textcolor="@androID:color/black"
        androID:textSize="16sp"
        app:magnitude="@{property.propertIEs.mag}"
        tools:text="8.9" />

    <linearLayout
        androID:layout_wIDth="0dp"
        androID:layout_height="wrap_content"
        androID:layout_gravity="center_vertical"
        androID:layout_marginStart="16dp"
        androID:layout_marginleft="16dp"
        androID:layout_weight="1"
        androID:orIEntation="vertical">

        <TextVIEw
            androID:ID="@+ID/LOCATIOn_offset"
            androID:layout_wIDth="wrap_content"
            androID:layout_height="wrap_content"
            androID:ellipsize="end"
            androID:FontFamily="sans-serif-medium"
            androID:maxlines="1"
            androID:textAllCaps="true"
            androID:textcolor="@androID:color/black"
            androID:textSize="12sp"
            tools:text="30km S of\n" />

        <TextVIEw

            androID:ID="@+ID/priMary_LOCATIOn"
            androID:layout_wIDth="wrap_content"
            androID:layout_height="wrap_content"
            androID:ellipsize="end"
            androID:maxlines="2"
            androID:textcolor="@androID:color/black"
            androID:textSize="12sp"
            app:place="@{property.propertIEs.placE}"
            tools:text="Long placeholder that should wrap to more than 2 line of text" />

    </linearLayout>

    <linearLayout
        androID:layout_wIDth="wrap_content"
        androID:layout_height="wrap_content"
        androID:layout_gravity="center_vertical"
        androID:layout_marginStart="16dp"
        androID:layout_marginleft="16dp"
        androID:orIEntation="vertical">

        <TextVIEw
            androID:ID="@+ID/date"
            androID:layout_wIDth="wrap_content"
            androID:layout_height="wrap_content"
            androID:layout_gravity="end"
            androID:textcolor="@color/textcolorEarthquakeDetails"
            androID:textSize="12sp"
            app:date="@{property.propertIEs.timE}"
            tools:text="Mar 6,2010" />

        <TextVIEw
            androID:ID="@+ID/time"
            androID:layout_wIDth="wrap_content"
            androID:layout_height="wrap_content"
            androID:layout_gravity="end"
            androID:textcolor="@color/textcolorEarthquakeDetails"
            androID:textSize="12sp"
            app:time="@{property.propertIEs.timE}"
            tools:text="3:00 PM" />
    </linearLayout>
</linearLayout>
</layout>
@H_403_19@

fragment_overvIEw.xml

    <layout
    xmlns:androID="http://scheR_676_11845@as.androID.com/apk/res/androID"
    xmlns:tools="http://scheR_676_11845@as.androID.com/tools"
    xmlns:app="http://scheR_676_11845@as.androID.com/apk/res-auto">

    <data>
        <variable
            name="viewmodel"
            type="com.example.kotlinearthquake.overvIEw.overvIEwviewmodel" />
    </data>


<relativeLayout
    androID:layout_wIDth="match_parent"
    androID:layout_height="match_parent"
    tools:context = "com.example.kotlinearthquake.MainActivity"
    >

    <androIDx.recyclervIEw.Widget.RecyclerVIEw
        androID:ID="@+ID/recycle_List"
        androID:layout_wIDth="match_parent"
        androID:layout_height="match_parent"
        androID:orIEntation="vertical"
        app:ListData="@{viewmodel.propertIEs}"
        tools:Listitem="@layout/earthquake_raw"
        app:layoutManager="androIDx.recyclervIEw.Widget.linearlayoutmanager"/>


    <TextVIEw
        androID:ID="@+ID/empty_vIEw"
        androID:layout_wIDth="wrap_content"
        androID:layout_height="wrap_content"
        androID:layout_centerInParent="true"
        androID:textAppearance="?androID:textAppearanceMedium"/>

    <Progressbar
        androID:ID="@+ID/loading_inDicator"
        style="@style/Widget.AppCompat.Progressbar"
        androID:layout_wIDth="wrap_content"
        androID:layout_height="wrap_content"
        androID:layout_centerInParent="true"/>

</relativeLayout>
</layout>
@H_403_19@

我尝试过,但没有找到解决我的问题的任何好的答案..我从过去 1 个月开始就陷入困境,请帮助我,我还是 androID 和 Kotlin 编程的新手。

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