如何使用科特林

Question

我怎樣才能使用科特林如下java代碼設置佈局管理器來RecycleView我設置佈局管理器來RecycleView：

mRecyclerView.setLayoutManager(mLinearLayoutManager); 

Answer 1

您可以使用綜合性能爲科特林

mRecyclerView.layoutManager = LinearLayoutManager(context) 

LinearLayoutManager constructors

爲了做到這一點，請將以下文件添加到您的根級build.gradle文件中：

buildscript { 
    dependencies { 
     classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion" 
    } 
} 

然後在您的應用程序的build.gradle添加以下頂部：

apply plugin: 'kotlin-android-extensions'

Answer 2

你可以這樣做

val linearLayoutManager = LinearLayoutManager(this) 
linearLayoutManager.orientation = LinearLayoutManager.VERTICAL 
recyclerview!!.layoutManager = linearLayoutManager 
recyclerview!!.isNestedScrollingEnabled = true 
recyclerview!!.setHasFixedSize(true) 

Answer 3

簡單地寫這個設置LayoutManager

// Define this globally 
lateinit var recyclerView: RecyclerView 

// Initialize this after `activity` or `fragment` is created 
recyclerView = findViewById(R.id.recyclerView) as RecyclerView 

recyclerView.setHasFixedSize(true) 
recyclerView.layoutManager = LinearLayoutManager(activity!!) as RecyclerView.LayoutManager 

Answer 4

我有同樣的問題，原因是我有初始化recyclerView作爲

var recyclerView = findViewById<View>(R.id.recycleView) 

確保您初始化如下

var recyclerView = findViewById<View>(R.id.recycleView) as RecyclerView 

Answer 5

應用插件，在您的應用程序建立

apply plugin: 'kotlin-android-extensions' 

對於我來說，視圖RecyclerView的編號是my_recycler_view。

在你的java文件寫入 -

my_recycler_view.layoutManager = LinearLayoutManager(context) 

默認LinearLayoutManager(context)將設置垂直方向，更新按需要。

Answer 6

recyclerView.layoutManager = LinearLayoutManager(context)

或

recyclerView.layoutManager = GridLayoutManager(context, spanCount)

Answer 7

您可以使用此代碼設置：

binding.recyclerView.setHasFixedSize(true) 
binding.recyclerView.layoutManager = LinearLayoutManager(this ,LinearLayoutManager.VERTICAL ,false) 
binding.recyclerView.adapter = customAdapter(this ,getList())