全边界GridLayoutManager

Question

有一个RecyclerView和GridLayoutManager。每一行负责显示三项。预期的视图是，所有与每个项目，应覆盖完整的边框，没有额外的粗体(4侧相等的宽度)。回收者视图的代码。无论我已经尝试过的方法和相应的界面屏幕也附加。

    mHomeRecyclerView = findViewById(R.id.home_screen_recycler_view);
    mHomeAdapter = new HomeScreenAdapter(this, mHomeScreenItem);

    // to provide scrolling functionality to parent
    mHomeRecyclerView.setNestedScrollingEnabled(false);
    mHomeRecyclerView.setHasFixedSize(true);
    GridLayoutManager layoutManager = new GridLayoutManager(this,3);
    mHomeRecyclerView.setLayoutManager(layoutManager);
    mHomeRecyclerView.setAdapter(mHomeAdapter);

适配器类的onCreateViewHolder()

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): 
RecyclerView.ViewHolder {
    mLayoutInflater = LayoutInflater.from(mContext)
    return HomeItemViewHolder(mLayoutInflater.inflate
    (R.layout.layout_home_child_item, parent, false))
}

layout_home_child_item.xml code is below

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/child_item_parent"
    android:layout_width="match_parent"
    android:layout_height="@dimen/one_not_seven_dp"
    android:padding="@dimen/image_select_tag_layout_padding"
    android:background="@drawable/shape_sub_category"
    android:clickable="true"
    android:gravity="center"
    android:orientation="vertical">

    <ImageView
        android:id="@+id/child_item_image"
        android:layout_width="@dimen/each_item_dimen"
        android:layout_height="@dimen/each_item_dimen" />

    <TextView
        android:id="@+id/child_item_text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="@dimen/image_icon_in_margin"
        android:textSize="@dimen/small_text_size"
        android:textColor="@color/result_received_icon_color"
        android:maxLines="1"
        android:ellipsize="end"
        android:gravity="center" />

</LinearLayout>

如下所示的shape_sub_category.xml

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<item android:id="@android:id/mask">
    <shape android:shape="rectangle">
        <solid android:color="@color/colorPrimaryDark" />
        <corners android:radius="@dimen/search_card_margin" />
    </shape>
</item>

<item android:id="@android:id/background">
    <shape android:shape="rectangle">
        <stroke
            android:width="@dimen/item_background_border_width"
            android:color="@color/grid_border_clr" />
        <solid android:color="@android:color/transparent" />
    </shape>
</item>

​

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但预期的UI如下所示(相同厚度的完全覆盖边框)

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提前感谢

Answer 1

要求提供一组网格内容，每个内容的边框应该与上面所附的屏幕截图的厚度相同。

为了用RecyclerView解决这个问题，我想出了不同的方法(类似于其他逻辑方法)。在这里，我描述我是如何实现同样的目标的。

1. 为RecyclerView创建完整的外部边框，位于RecyclerView的布局下面，并绘制相应的边框。 “android:background="@drawable/recycler_border”android:layout_marginTop="@dimen/send_cmd_round_rect“android:layout_marginLeft="@dimen/send_cmd_round_rect”android:layout_marginRight="@dimen/send_cmd_round_rect“android:layout_marginBottom="@dimen/send_cmd_round_rect”android:clipToPadding=“

recycler_border.xml如下所示

<shape android:shape="rectangle" xmlns:android="http://schemas.android.com/apk/res/android">
    <stroke
        android:width="@dimen/item_background_border_width"
        android:color="@color/grid_border_clr" />
    <solid android:color="@android:color/transparent" />
</shape>

通过上面的代码更改，我们可以观察到RecyclerView布局的外部边框。

1. 为了为子项目提供边框，我们将使用GridDividerItemDecoration类.此项装饰类期望垂直和水平可绘制，以及RecyclerView网格中的列数。

Drawable horizontalDivider = ContextCompat.getDrawable(this, R.drawable.line_divider); Drawable verticalDivider = ContextCompat.getDrawable(this, R.drawable.line_divider); mHomeRecyclerView.addItemDecoration(new GridDividerItemDecoration(horizontalDivider, verticalDivider, 3));

line_divider是一种自定义绘图，用于提供如下所示的行规范。

<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<size
    android:width="@dimen/item_background_border_width"
    android:height="@dimen/item_background_border_width" />
<solid android:color="@color/grid_border_clr" /></shape>

1. 为了访问GridDividerItemDecoration，我们需要在应用程序的build.gradle中添加依赖项。 compile 'com.bignerdranch.android:simple-item-decoration:1.0.0' 输出屏幕截图附在下面(宽度为0.3dp)

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