经过网上的彻底搜索，终于能够解决这个问题。
我一步一步地给出了代码，并在需要时给出解释。
1 - 创建新的android studio项目
2 - Activity_main.xml 的代码如下：
活动_main.xml
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainPageActivity">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:drawable/screen_background_light_transparent"
tools:listitem="@layout/item_list" />
</androidx.constraintlayout.widget.ConstraintLayout>
3 - 为 recyclerview 行（项目）创建一个名为 item_list.xml 的布局，如下所示
项目列表.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:orientation="horizontal">
<LinearLayout
android:id="@+id/linear_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="3"
android:background="#FFFFFF"
android:orientation="vertical"
android:padding="5dp">
<TextView
android:id="@+id/tv_label"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="right"
android:text="TextView"
android:textColor="#000000" />
<TextView
android:id="@+id/tv_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center|right"
android:text="TextView"
android:textColor="#000000" />
</LinearLayout>
<ImageView
android:id="@+id/img_chanel"
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_weight="1"
app:srcCompat="@mipmap/ic_launcher" />
</LinearLayout>
4 - 创建数据类（基于要在 RecyclerView 中绑定的数据），如下所示
我的模型（UserModel.kt）
public data class UserModel(var title:String,var name:String,var isSelected:Boolean=false)
5 - 为您的 RecyclerView 创建适配器，如下所示
自定义适配器.kt
class CustomAdapter(private val context: Context, private val list: ArrayList<UserModel>,
private val listener: OnItemClickListener
) : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
private inner class ViewHolder internal constructor(itemView: View) : RecyclerView.ViewHolder(itemView),View.OnClickListener {
internal var tvLabel: TextView
internal var tvName: TextView
init {
tvLabel = itemView.findViewById(R.id.tv_label) // Initialize your All views prensent in list items
tvName = itemView.findViewById(R.id.tv_name) // Initialize your All views prensent in list items
itemView.setOnClickListener(this)
}
internal fun bind(position: Int) {
// This method will be called anytime a list item is created or update its data
//Do your stuff here
tvLabel.text = list[position].title
tvName.text = list[position].name
}
override fun onClick(v: View?) {
val position:Int = adapterPosition
if(position != RecyclerView.NO_POSITION) {
listener.onItemClick(position,this@CustomAdapter,itemView)
}
}
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
return ViewHolder(LayoutInflater.from(context).inflate(R.layout.item_list, parent, false))
}
override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
if(list[position].isSelected){
holder.itemView.setBackgroundColor(Color.YELLOW)
holder.itemView.findViewById<LinearLayout>(R.id.linear_content).setBackgroundColor(Color.YELLOW)
} else{
holder.itemView.setBackgroundColor(Color.WHITE)
holder.itemView.findViewById<LinearLayout>(R.id.linear_content).setBackgroundColor(Color.WHITE)
}
(holder as ViewHolder).bind(position)
}
override fun getItemCount(): Int {
return list.size
}
interface OnItemClickListener{
fun onItemClick(position: Int,adapter:CustomAdapter,v:View)
}
}
6 - MainActivity.kt 的代码如下：
MainActivity.kt
class MainActivity : AppCompatActivity(),CustomAdapter.OnItemClickListener {
private val data = arrayListOf<UserModel>()
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main_page)
val recyclerview = findViewById<RecyclerView>(R.id.recycler_view)
data.add(UserModel(title = "item 1",name = "name 1"))
data.add(UserModel(title = "item 2",name = "name 2"))
data.add(UserModel(title = "item 3",name = "name 3"))
data.add(UserModel(title = "item 4",name = "name 4"))
data.add(UserModel(title = "item 5",name = "name 5"))
data.add(UserModel(title = "item 6",name = "name 6"))
data.add(UserModel(title = "item 1",name = "name 1"))
data.add(UserModel(title = "item 2",name = "name 2"))
data.add(UserModel(title = "item 3",name = "name 3"))
data.add(UserModel(title = "item 4",name = "name 4"))
data.add(UserModel(title = "item 5",name = "name 5"))
data.add(UserModel(title = "item 6",name = "name 6"))
val adapter = CustomAdapter(this,data,this)
recyclerview.layoutManager = LinearLayoutManager(this)
recyclerview.adapter = adapter
recyclerview.setHasFixedSize(true)
}
override fun onItemClick(position: Int,adapter: CustomAdapter,v:View) {
val clicked_item:UserModel = data[position]
clicked_item.title = "clicked"
clicked_item.isSelected = !clicked_item.isSelected
if(clicked_item.isSelected){
recycler_view.getChildAt(recycler_view.indexOfChild(v)).setBackgroundColor(Color.YELLOW)
recycler_view.getChildAt(recycler_view.indexOfChild(v)).findViewById<LinearLayout>(R.id.linear_content).setBackgroundColor(Color.YELLOW)
}else{
recycler_view.getChildAt(recycler_view.indexOfChild(v)).setBackgroundColor(Color.WHITE)
recycler_view.getChildAt(recycler_view.indexOfChild(v)).findViewById<LinearLayout>(R.id.linear_content).setBackgroundColor(Color.WHITE)
}
}
}
希望对你有帮助
