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
试试这个简单的单行代码
recyclerView.addItemDecoration(new DividerItemDecoration(getContext(),LinearLayoutManager.VERTICAL));
其他回答
在res/drawable文件夹中创建一个单独的xml文件
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
<size android:height="1dp" />
<solid android:color="@android:color/black" />
</shape>
在主活动中连接那个xml文件(your_file)，像这样:
DividerItemDecoration divider = new DividerItemDecoration(
recyclerView.getContext(),
DividerItemDecoration.VERTICAL
);
divider.setDrawable(ContextCompat.getDrawable(getBaseContext(), R.drawable.your_file));
recyclerView.addItemDecoration(divider);
我认为你是在使用Fragments来实现RecyclerView
在创建RecyclerView和LayoutManager对象后，只需添加这些行
DividerItemDecoration dividerItemDecoration = new DividerItemDecoration(recyclerView.getContext(),
DividerItemDecoration.VERTICAL);
recyclerView.addItemDecoration(dividerItemDecoration);
就是这样！
它支持水平和垂直方向。
只需在项目适配器的末尾添加一个视图:
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#FFFFFF"/>
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)
}
}
}
