如何在Android RecyclerView中添加分隔线?

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

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);

2017-12-15 04:17:42

其他回答

  class ItemOffsetDecoration(
        context: Context,
        private val paddingLeft: Int,
        private val paddingRight: Int
    ) : RecyclerView.ItemDecoration() {
        private var mDivider: Drawable? = null

        init {
            mDivider = ContextCompat.getDrawable(context, R.drawable.divider_medium)
        }

        override fun onDrawOver(c: Canvas, parent: RecyclerView, state: RecyclerView.State) {
            val left = parent.paddingLeft + paddingLeft
            val right = parent.width - parent.paddingRight - paddingRight
            val childCount = parent.childCount
            for (i in 0 until childCount) {
                val child = parent.getChildAt(i)
                val params = child.layoutParams as RecyclerView.LayoutParams
                val top = child.bottom + params.bottomMargin
                val bottom = top + (mDivider?.intrinsicHeight ?: 0)

                mDivider?.let {
                    it.setBounds(left, top, right, bottom)
                    it.draw(c)
                }
            }
        }
    }

你只需要在R.drawable.divider_medium中指定一个颜色

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="@android:color/black" />
    <size
        android:height="1dp"
        android:width="1dp" />

</shape>

并将它添加到您的recyclerView

recyclerView.addItemDecoration(
                        ItemOffsetDecoration(
                            this,
                            resources.getDimension(resources.getDimension(R.dimen.dp_70).roundToInt()).roundToInt(),
                            0
                        )
                    )

refernce这

2019-11-04 07:10:47

你需要添加下一行…

mRecyclerView.addItemDecoration(new DividerItemDecoration(getContext(), DividerItemDecoration.VERTICAL));

2017-10-31 17:31:05

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。

2015-07-06 10:02:32

yqritc的RecyclerView-FlexibleDivider使它成为一个内衬。首先把这个添加到你的build.gradle:

compile 'com.yqritc:recyclerview-flexibledivider:1.4.0' // requires jcenter()

现在你可以在你设置recyclerView的适配器的地方配置和添加一个分配器:

recyclerView.setAdapter(myAdapter);
recyclerView.addItemDecoration(new HorizontalDividerItemDecoration.Builder(this).color(Color.RED).sizeResId(R.dimen.divider).marginResId(R.dimen.leftmargin, R.dimen.rightmargin).build());

2015-07-06 10:10:02

recyclerview.addItemDecoration(new DividerItemDecoration(this, LinearLayoutManager.HORIZONTAL));

对于垂直线使用LinearLayoutManager。垂直

2018-06-15 10:51:53

如何在Android RecyclerView中添加分隔线?

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