我正在开发一个android应用程序，我正在使用RecyclerView。我需要在RecyclerView中添加一个分隔符。 我试着加上-
recyclerView.addItemDecoration(new
DividerItemDecoration(getActivity(),
DividerItemDecoration.VERTICAL_LIST));
下面是我的XML代码-
<android.support.v7.widget.RecyclerView
android:id="@+id/drawerList"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
/>
当前回答
Bhuvanesh BS解决方案有效。Kotlin版本:
import android.graphics.Canvas
import android.graphics.drawable.Drawable
import androidx.recyclerview.widget.RecyclerView
class DividerItemDecorator(private val mDivider: Drawable?) : RecyclerView.ItemDecoration() {
override fun onDraw(
canvas: Canvas,
parent: RecyclerView,
state: RecyclerView.State
) {
val dividerLeft = parent.paddingLeft
val dividerRight = parent.width - parent.paddingRight
for (i in 0 until parent.childCount - 1) {
val child = parent.getChildAt(i)
val dividerTop =
child.bottom + (child.layoutParams as RecyclerView.LayoutParams).bottomMargin
val dividerBottom = dividerTop + mDivider!!.intrinsicHeight
mDivider.setBounds(dividerLeft, dividerTop, dividerRight, dividerBottom)
mDivider.draw(canvas)
}
}
}
其他回答
如果你想同时使用水平和垂直分隔符:
Define horizontal & vertical divider drawables: horizontal_divider.xml <?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" > <size android:height="1dip" /> <solid android:color="#22000000" /> </shape> vertical_divider.xml <?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" > <size android:width="1dip" /> <solid android:color="#22000000" /> </shape> Add this code segment below: DividerItemDecoration verticalDecoration = new DividerItemDecoration(recyclerview.getContext(), DividerItemDecoration.HORIZONTAL); Drawable verticalDivider = ContextCompat.getDrawable(getActivity(), R.drawable.vertical_divider); verticalDecoration.setDrawable(verticalDivider); recyclerview.addItemDecoration(verticalDecoration); DividerItemDecoration horizontalDecoration = new DividerItemDecoration(recyclerview.getContext(), DividerItemDecoration.VERTICAL); Drawable horizontalDivider = ContextCompat.getDrawable(getActivity(), R.drawable.horizontal_divider); horizontalDecoration.setDrawable(horizontalDivider); recyclerview.addItemDecoration(horizontalDecoration);
我认为这是最简单的方法
mDividerItemDecoration = new DividerItemDecoration(recyclerView.getContext(),
DividerItemDecoration.VERTICAL);
// or DividerItemDecoration.HORIZONTALL
mDividerItemDecoration.setDrawable(getDrawable(R.drawable.myshape));
recyclerView.addItemDecoration(mDividerItemDecoration);
注意:myshape可以是你想要做分隔的高度的矩形
所以这可能不是正确的方式，但我只是添加了一个视图到RecyclerView的单项视图(因为我不认为有一个内置的函数)，像这样:
<View
android:layout_width="fill_parent"
android:layout_height="@dimen/activity_divider_line_margin"
android:layout_alignParentBottom="true"
android:background="@color/tasklist_menu_dividerline_grey" />
这意味着每一项都有一行在底部填充。我把它做成1dp高，背景#111111。这也给了它一种“3D”效果。
为了让nj的回答更简单一点，你可以这样做:
public class DividerColorItemDecoration extends DividerItemDecoration {
public DividerColorItemDecoration(Context context, int orientation) {
super(context, orientation);
setDrawable(ContextCompat.getDrawable(context, R.drawable.line_divider));
}
}
只需在您的RecycleView适配器的项目底部添加x量的边缘。
onCreateViewHolder
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
layoutParams.setMargins(0, 0, 0, 5);
itemView.setLayoutParams(layoutParams);
