安卓 : clickable Image horizontal slider using kotlin

Question

我想添加水平图像滚动条，如下面附加的图像。我知道有解决方案，但所有解决方案都有 4 到 5 年的历史，在 Kotlin 和约束布局之后，我假设现在有一些好的方法可以实现这一目标。请帮助我并分享最好、最简单的方法来做到这一点。提前致谢。

Answer 1

创建项目:

<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:id="@+id/card_view"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginBottom="16dp"
    android:background="@color/colorAccent"
    card_view:cardCornerRadius="8dp"
    card_view:cardUseCompatPadding="true">

    <LinearLayout
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:orientation="vertical">

        <androidx.appcompat.widget.AppCompatImageView
            android:id="@+id/imageView"
            android:layout_width="match_parent"
            android:layout_height="150dp"
            android:scaleType="centerCrop"
            android:src="@mipmap/ic_launcher_round" />

        <androidx.appcompat.widget.AppCompatTextView
            android:id="@+id/tvName"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center_horizontal"
            android:padding="8dp"
            android:text="@string/app_name"
            android:textColor="#000000"
            android:textSize="16sp" />

    </LinearLayout>

</androidx.cardview.widget.CardView>

然后将此项目添加到您的RecyclerView中:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <androidx.appcompat.widget.LinearLayoutCompat
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:background="@color/colorPrimary" />

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:padding="10dp" />

</LinearLayout>

然后从您的 Activity 中调用它，并为其设置一个 HORIZONTAL LayoutManager 及其适配器:

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        displayList()
    }

    private fun displayList() {
        val imageList = ArrayList<ImageDataModel>()
        imageList.clear()
        imageList.add(ImageDataModel("https://conversionxl.com/wp-content/uploads/2018/09/coding-language.jpg", "Test"))
        imageList.add(ImageDataModel("https://makeawebsitehub.com/wp-content/uploads/2016/02/learn-code-e1455713167295.jpg", "Test"))
        imageList.add(ImageDataModel("https://www.tecmint.com/wp-content/uploads/2016/11/Convert-PNG-to-JPG-Using-for-loop-Command.png", "Test"))
        imageList.add(ImageDataModel("https://conversionxl.com/wp-content/uploads/2018/09/coding-language.jpg", "Test"))
        imageList.add(ImageDataModel("https://www.tecmint.com/wp-content/uploads/2016/11/Convert-PNG-to-JPG-Using-for-loop-Command.png", "Test"))
        recyclerView.layoutManager = LinearLayoutManager(this, LinearLayout.HORIZONTAL, false)
        recyclerView.adapter = ViewAdapter(imageList)
    }
}

正如您所看到的，RecyclerView 也需要一个适配器，它是一个简单的适配器，使用 Glide显示这样的图像:

class ViewAdapter(private val imageDataModelList: ArrayList<ImageDataModel>) : RecyclerView.Adapter<ViewAdapter.ViewHolder>() {

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        return ViewHolder(LayoutInflater.from(parent.context).inflate(R.layout.item_list, parent, false))
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        holder.bindItems(imageDataModelList[position])
    }

    override fun getItemCount(): Int {
        return imageDataModelList.size
    }

    class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        fun bindItems(imageDataModel: ImageDataModel) {
            val textView = itemView.findViewById<TextView>(R.id.tvName)
            val imageView = itemView.findViewById<ImageView>(R.id.imageView)
            textView.text = imageDataModel.name

            Glide.with(itemView.context).load(imageDataModel.url).into(imageView)
        }
    }
}

不要忘记在应用程序级 build.gradle 中添加 Glide 的依赖项:

dependencies {
  implementation 'com.github.bumptech.glide:glide:4.10.0'
  annotationProcessor 'com.github.bumptech.glide:compiler:4.10.0'
}

该应用程序应如下所示: /image/fpGuq.jpg