Scala RecyclerView类代码示例

//设置package包名称以及导入依赖的类
package sword.langbook.android.viewholders

import android.support.v7.widget.RecyclerView
import android.view.View

abstract class BaseViewHolder(view: View) extends RecyclerView.ViewHolder(view)

object BaseViewHolder {
  object types {
    val checkableEntry = 0
    val descriptionHeader = 1
    val sectionEntry = 2
    val sectionHeader = 3
    val symbol = 4
  }
} 

//设置package包名称以及导入依赖的类
package sword.langbook.android.activities

import android.support.v7.widget.RecyclerView
import android.view.View.OnClickListener
import android.view.{View, ViewGroup}
import sword.langbook.android.R
import sword.langbook.android.viewholders._
import sword.langbook.db.Symbol

case class SymbolDetailsAdapter(activity: BaseActivity, symbol: Symbol) extends RecyclerView.Adapter[BaseViewHolder] {
  val alphabets = symbol.alphabetsWhereIncluded.toVector

  val alphabetSectionSize = if (alphabets.nonEmpty) alphabets.size + 1 else 0

  override val getItemCount = 1 + alphabetSectionSize

  override def getItemViewType(position: Int) = {
    if (position == 1) BaseViewHolder.types.sectionHeader
    else BaseViewHolder.types.sectionEntry
  }

  override def onCreateViewHolder(viewGroup: ViewGroup, viewType: Int) = {
    viewType match {
      case BaseViewHolder.types.`sectionHeader` => SectionHeaderViewHolder.newInstance(viewGroup)
      case BaseViewHolder.types.`sectionEntry` => SectionEntryViewHolder.newInstance(viewGroup)
    }
  }

  override def onBindViewHolder(vh: BaseViewHolder, position: Int): Unit = {
    vh match {
      case holder: SectionHeaderViewHolder =>
        holder.textView.setText(activity.getString(R.string.alphabetsWhereIncluded))
      case holder: SectionEntryViewHolder =>
        val textView = holder.textView
        if (position == 0) {
          textView.setText(s"Unicode: ${symbol.unicode.toHexString}")
          textView.setClickable(false)
        }
        else {
          val alphabet = alphabets(position - 2)
          textView.setText(alphabet.suitableTextForLanguage(activity.preferredLanguage).getOrElse(""))
          textView.setOnClickListener(new OnClickListener {
            override def onClick(v: View): Unit = {
              AlphabetDetails.openWith(activity, alphabetEncodedKey = alphabet.key.encoded)
            }
          })
          textView.setClickable(true)
        }
    }
  }
} 

//设置package包名称以及导入依赖的类
package sword.langbook.android.activities

import android.app.Activity
import android.support.v7.widget.RecyclerView
import android.util.DisplayMetrics
import android.view.View.OnClickListener
import android.view.{View, ViewGroup}
import sword.langbook.android.R
import sword.langbook.android.viewholders.SymbolViewHolder
import sword.langbook.db.Alphabet

object AlphabetDetailsAdapter {

  def apply(activity: Activity, alphabet: Alphabet) = {
    val metrics = new DisplayMetrics()
    activity.getWindowManager.getDefaultDisplay.getMetrics(metrics)

    val columns = metrics.widthPixels / activity.getResources.getDimensionPixelSize(R.dimen.alphabetDetailsSymbolSide)
    new AlphabetDetailsAdapter(activity, alphabet, columns)
  }
}

case class AlphabetDetailsAdapter(activity: Activity, alphabet: Alphabet, spanCount: Int) extends RecyclerView.Adapter[SymbolViewHolder] {
  val symbols = alphabet.symbols.toSeq.sortWith(_.unicode < _.unicode)
  val chars = symbols.map(_.unicode.toChar)
  override val getItemCount = symbols.size

  override def onCreateViewHolder(viewGroup: ViewGroup, viewType: Int) = {
    SymbolViewHolder.newInstance(viewGroup)
  }

  override def onBindViewHolder(vh: SymbolViewHolder, position: Int): Unit = {
    vh.textView.setText("" + chars(position))
    vh.textView.setOnClickListener(new OnClickListener {
      override def onClick(v: View): Unit = {
        SymbolDetails.openWith(activity, symbol = symbols(position))
      }
    })
  }
} 

//设置package包名称以及导入依赖的类
package com.android.perrier1034.post_it_note.ui

import android.content.Context
import android.content.res.TypedArray
import android.graphics.drawable.Drawable
import android.graphics.{Canvas, Rect}
import android.support.v7.widget.RecyclerView

object DividerAdder {
  private val ATTRS: Array[Int] = Array[Int](android.R.attr.listDivider)
}

class DividerAdder extends RecyclerView.ItemDecoration {
  private var mDivider: Drawable = null

  def this(context: Context) {
    this()
    val array: TypedArray = context.obtainStyledAttributes(DividerAdder.ATTRS)
    mDivider = array.getDrawable(0)
    array.recycle
  }

  @SuppressWarnings(Array("deplicated"))
  override def getItemOffsets(outRect: Rect, itemPosition: Int, parent: RecyclerView) {
    outRect.set(0, 0, 0, mDivider.getIntrinsicHeight)
  }

  override def onDraw(c: Canvas, parent: RecyclerView) {
    drawVertical(c, parent)
  }

  def drawVertical(c: Canvas, parent: RecyclerView) {
    val left: Int = parent.getPaddingLeft
    val right: Int = parent.getWidth - parent.getPaddingRight
    val childCount: Int = parent.getChildCount

    for (i <- 0 until parent.getChildCount) {
      val child = parent.getChildAt(i)
      val params = child.getLayoutParams.asInstanceOf[RecyclerView.LayoutParams]
      val top = child.getBottom + params.bottomMargin
      val bottom = top + mDivider.getIntrinsicHeight
      mDivider.setBounds(left, top, right, bottom)
      mDivider.draw(c)
    }
  }
} 

//设置package包名称以及导入依赖的类
package com.yhsif.notifbot

import android.graphics.drawable.Drawable
import android.support.v7.widget.RecyclerView
import android.view.View
import android.widget.ImageView
import android.widget.TextView

class PkgViewHolder(v: View) extends RecyclerView.ViewHolder(v) {
  def setIcon(icon: Drawable) = {
    v.findViewById(R.id.icon).asInstanceOf[ImageView].setImageDrawable(icon)
  }

  def setName(name: String) = {
    v.findViewById(R.id.name).asInstanceOf[TextView].setText(name)
  }

  def setBackground(i: Int) = {
    if (i % 2 == 0) {
      v.setBackgroundColor(v.getContext().getColor(R.color.even_background))
    } else {
      v.setBackgroundColor(v.getContext().getColor(R.color.odd_background))
    }
  }
} 

//设置package包名称以及导入依赖的类
package com.yhsif.notifbot

import android.support.v7.widget.RecyclerView
import android.view.LayoutInflater
import android.view.ViewGroup
import android.view.View

import scala.collection.mutable.ListBuffer

class PkgAdapter(
    var list: ListBuffer[PkgData],
    val listener: View.OnClickListener)
    extends RecyclerView.Adapter[PkgViewHolder] {

  override def onCreateViewHolder(parent: ViewGroup, vt: Int): PkgViewHolder = {
    val v =
      LayoutInflater
        .from(parent.getContext())
        .inflate(R.layout.pkg_item, parent, false)
    v.setOnClickListener(listener)
    return new PkgViewHolder(v)
  }

  override def onBindViewHolder(vh: PkgViewHolder, i: Int): Unit = {
    vh.setIcon(list.apply(i).icon)
    vh.setName(list.apply(i).name)
    vh.setBackground(i)
  }

  override def getItemCount(): Int = list.length

  override def onAttachedToRecyclerView(rv: RecyclerView): Unit = {
    super.onAttachedToRecyclerView(rv)
  }

  def remove(i: Int) = {
    list.remove(i)
    notifyDataSetChanged()
  }
} 

//设置package包名称以及导入依赖的类
package com.yhsif.autonotif

import android.graphics.drawable.Drawable
import android.support.v7.widget.RecyclerView
import android.view.View
import android.widget.ImageView
import android.widget.TextView

class PkgViewHolder(v: View) extends RecyclerView.ViewHolder(v) {
  def setIcon(icon: Drawable) = {
    v.findViewById(R.id.icon).asInstanceOf[ImageView].setImageDrawable(icon)
  }

  def setName(name: String) = {
    v.findViewById(R.id.name).asInstanceOf[TextView].setText(name)
  }

  def setBackground(i: Int) = {
    if (i % 2 == 0) {
      v.setBackgroundColor(v.getContext().getColor(R.color.even_background))
    } else {
      v.setBackgroundColor(v.getContext().getColor(R.color.odd_background))
    }
  }
} 

//设置package包名称以及导入依赖的类
package com.yhsif.autonotif

import android.support.v7.widget.RecyclerView
import android.view.LayoutInflater
import android.view.ViewGroup
import android.view.View

import scala.collection.mutable.ListBuffer

class PkgAdapter(
    var list: ListBuffer[PkgData],
    val listener: View.OnClickListener)
    extends RecyclerView.Adapter[PkgViewHolder] {

  override def onCreateViewHolder(parent: ViewGroup, vt: Int): PkgViewHolder = {
    val v =
      LayoutInflater
        .from(parent.getContext())
        .inflate(R.layout.pkg_item, parent, false)
    v.setOnClickListener(listener)
    return new PkgViewHolder(v)
  }

  override def onBindViewHolder(vh: PkgViewHolder, i: Int): Unit = {
    vh.setIcon(list.apply(i).icon)
    vh.setName(list.apply(i).name)
    vh.setBackground(i)
  }

  override def getItemCount(): Int = list.length

  override def onAttachedToRecyclerView(rv: RecyclerView): Unit = {
    super.onAttachedToRecyclerView(rv)
  }

  def remove(i: Int) = {
    list.remove(i)
    notifyDataSetChanged()
  }
}