android – GridLayoutManager for RecyclerView的Square布局

我尝试使用方形图像制作网格布局.我认为必须可以通过操作onMeasure来操作GridLayoutManager

super.onMeasure(recycler, state, widthSpec, widthSpec); 

代替

super.onMeasure(recycler, state, widthSpec, heightSpec);

但不幸的是,这没有用.

有任何想法吗？

解决方法:

为了在我的RecyclerView中使用方形元素,我为我的根视图元素提供了一个简单的包装器;我使用以下SquareRelativeLayout代替RelativeLayout.

package net.simplyadvanced.widget;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.RelativeLayout;

/** A RelativeLayout that will always be square -- same width and height,
 * where the height is based off the width. */
public class SquareRelativeLayout extends RelativeLayout {

    public SquareRelativeLayout(Context context) {
        super(context);
    }

    public SquareRelativeLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public SquareRelativeLayout(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @TargetApi(VERSION_CODES.LOLLIPOP)
    public SquareRelativeLayout(Context context, AttributeSet attrs,         int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        // Set a square layout.
        super.onMeasure(widthMeasureSpec, widthMeasureSpec);
    }

}

然后,在我的适配器的XML布局中,我刚刚引用了自定义视图,如下所示.不过,您也可以通过编程方式执行此操作.

<?xml version="1.0" encoding="utf-8"?>
<net.simplyadvanced.widget.SquareRelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/elementRootView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <!-- More widgets here. -->

</net.simplyadvanced.widget.SquareRelativeLayout>

注意：根据网格的方向,您可能希望宽度基于高度(GridLayoutManager.HORIZONTAL),而不是基于宽度的高度(GridLayoutManager.VERTICAL).

标签：android,android-recyclerview,gridlayoutmanager
来源： https://codeday.me/bug/20190925/1817467.html