Created
September 25, 2019 07:48
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Vertical and Horizontal RecyclerView Divider Item
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| import android.graphics.Canvas | |
| import android.graphics.drawable.Drawable | |
| import android.util.TypedValue | |
| import androidx.recyclerview.widget.LinearLayoutManager | |
| import androidx.recyclerview.widget.RecyclerView | |
| /** | |
| * [RecyclerView] item decoration which adds horizontal divider between items. | |
| * | |
| * @author Muhammad Saeed | |
| */ | |
| @Suppress("unused") | |
| class DividerItemDecoration( | |
| private val drawable: Drawable, | |
| private val marginLeft: Float = 16f, | |
| private val marginRight: Float = 16f, | |
| private val marginTop: Float = 16f, | |
| private val marginBottom: Float = 16f, | |
| private val dividerWidth: Int = 2 | |
| ) : RecyclerView.ItemDecoration() { | |
| override fun onDrawOver(c: Canvas, parent: RecyclerView, state: RecyclerView.State) { | |
| super.onDrawOver(c, parent, state) | |
| for (i in 0 until parent.childCount - 1) { | |
| val child = parent.getChildAt(i) | |
| val params = child.layoutParams as RecyclerView.LayoutParams | |
| if (parent.layoutManager !is LinearLayoutManager) { | |
| return | |
| } | |
| if ((parent.layoutManager as LinearLayoutManager).orientation == RecyclerView.VERTICAL) { | |
| val top = child.bottom - params.bottomMargin - dividerWidth | |
| val bottom = child.bottom - params.bottomMargin | |
| val left = child.left - params.leftMargin + TypedValue.applyDimension( | |
| TypedValue.COMPLEX_UNIT_DIP, | |
| marginLeft, | |
| parent.context?.resources?.displayMetrics | |
| ).toInt() | |
| val right = child.right - params.rightMargin - TypedValue.applyDimension( | |
| TypedValue.COMPLEX_UNIT_DIP, | |
| marginRight, | |
| parent.context?.resources?.displayMetrics | |
| ).toInt() | |
| drawable.setBounds(left, top, right, bottom) | |
| drawable.draw(c) | |
| } else { | |
| val top = child.top - params.topMargin + TypedValue.applyDimension( | |
| TypedValue.COMPLEX_UNIT_DIP, | |
| marginTop, | |
| parent.context?.resources?.displayMetrics | |
| ).toInt() | |
| val bottom = child.bottom - params.bottomMargin - TypedValue.applyDimension( | |
| TypedValue.COMPLEX_UNIT_DIP, | |
| marginBottom, | |
| parent.context?.resources?.displayMetrics | |
| ).toInt() | |
| val left = child.right - params.rightMargin - dividerWidth | |
| val right = child.right - params.rightMargin | |
| drawable.setBounds(left, top, right, bottom) | |
| drawable.draw(c) | |
| } | |
| } | |
| } | |
| } |
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