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
在2016年10月的更新中，支持库v25.0.0现在有了基本水平和垂直分隔符的默认实现!
https://developer.android.com/reference/android/support/v7/widget/DividerItemDecoration.html
recyclerView.addItemDecoration(new DividerItemDecoration(recyclerView.getContext(), DividerItemDecoration.VERTICAL));
其他回答
在2016年10月的更新中，支持库v25.0.0现在有了基本水平和垂直分隔符的默认实现!
https://developer.android.com/reference/android/support/v7/widget/DividerItemDecoration.html
recyclerView.addItemDecoration(new DividerItemDecoration(recyclerView.getContext(), DividerItemDecoration.VERTICAL));
芬兰湾的科特林版:
recyclerview.addItemDecoration(DividerItemDecoration(this, LinearLayoutManager.VERTICAL))
不幸的是，Android只是把小事情变得太复杂了。实现你想要的最简单的方法，没有实现这里的DividerItemDecoration:
为RecyclerView添加你想要的分割线颜色的背景色:
<RecyclerView
android:id="@+id/rvList"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:divider="@color/colorLightGray"
android:scrollbars="vertical"
tools:listitem="@layout/list_item"
android:background="@android:color/darker_gray"/>
添加底部边距(android:layout_marginBottom)到项目的布局根(list_item.xml):
<RelativeLayout
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:layout_marginBottom="1dp">
<TextView
android:id="@+id/tvName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="John Doe" />
<TextView
android:id="@+id/tvDescription"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/tvName"
android:text="Some description blah blah" />
</RelativeLayout>
这将在项目和RecyclerView的背景色之间提供1dp的空间(它是深灰色，将作为分隔符出现)。
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);
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)
}
}
}
