如何向RecyclerView中使用的水平分隔符添加自定义填充?
到目前为止,这是我的解决方案,但是完全忽略了填充:
import android.content.Context
import android.graphics.Rect
import android.view.View
import androidx.recyclerview.widget.DividerItemDecoration
import androidx.recyclerview.widget.RecyclerView
import android.util.TypedValue
class CustomDecoration(val context: Context?, orientation: Int, private val padding: Float) : DividerItemDecoration(context, orientation) {
override fun getItemOffsets(outRect: Rect, view: View, parent: RecyclerView, state: RecyclerView.State) {
val position = parent.getChildAdapterPosition(view)
outRect.right = dpToPx(padding)
outRect.left = dpToPx(padding)
// hide the divider for the last child
if (position == parent.adapter!!.itemCount - 1) {
outRect.setEmpty()
} else {
super.getItemOffsets(outRect, view, parent, state)
}
}
fun dpToPx(dp: Float): Int{
val metrics = context?.resources?.displayMetrics
return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, metrics).toInt()
}
}
答案 0 :(得分:1)
这是因为您正在呼叫super.getItemOffsets(outRect, view, parent, state)
如果您使用此方法,您会发现它会重置所有值
public void getItemOffsets(@NonNull Rect outRect, int itemPosition, @NonNull RecyclerView parent) {
outRect.set(0, 0, 0, 0);
}
如此调整您的代码以使其正常工作
override fun getItemOffsets(outRect: Rect, view: View, parent: RecyclerView, state: RecyclerView.State) {
super.getItemOffsets(outRect, view, parent, state)
val position = parent.getChildAdapterPosition(view)
outRect.right = dpToPx(padding)
outRect.left = dpToPx(padding)
// hide the divider for the last child
if (position == parent.adapter!!.itemCount - 1) {
outRect.setEmpty()
}
}
fun dpToPx(dp: Float): Int{
val metrics = context?.resources?.displayMetrics
return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, metrics).toInt()
}