如何以编程方式设置cardView的columnWeight

Question

I am using GridLayout which contains 3 cardviews initially. 我正在使用最初包含3个cardviews GridLayout 。 Now when user clicks last card I want to add one more card to GridLayout . 现在，当用户单击最后一张卡片时，我想向GridLayout再添加一张卡片。

But in the initial 3 cards which I created in xml file contains attribute ' columnweight '. 但是在我在xml文件中创建的最初的3张卡中，包含属性' columnweight '。 So i want to set this attribute to the newly created cardview after onClick . 所以我想在onClick之后将此属性设置为新创建的cardview 。

I have seen some question related to this. 我已经看到一些与此有关的问题。 But they are creating their gridlayout also programmatically and don't want to create gridLayout programmatically. 但是他们也在以编程方式创建其gridlayout并且不想以编程方式创建gridLayout 。 How can I do this? 我怎样才能做到这一点？

Note :- My each CradView structure is like this :- Cardview->LinearLayout->TextView 注意：-我的每个CradView结构都是这样的：-Cardview-> LinearLayout-> TextView

I have went through the below link this 我已经通过下面的链接了

But as I said they created gridLayout programmatically and I want to do that. 但是正如我所说的，他们gridLayout编程方式创建了gridLayout ，我想这样做。

My initial Layout with GridView containg 3 cardViews is 我最初的GridView包含3 cardViews布局是

<?xml version="1.0" encoding="utf-8"?>

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fillViewport="true">

    <LinearLayout android:layout_width="match_parent"
        android:layout_height="match_parent"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:orientation="vertical"
        android:id="@+id/activity_manager"
        android:weightSum="10">

        <Space
            android:layout_height="30dp"
            android:layout_width="wrap_content"/>

        <GridLayout
            android:id="@+id/mainGrid"
            android:columnCount="2"
            android:alignmentMode="alignMargins"
            android:columnOrderPreserved="false"
            android:layout_weight="5"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="14dp" >

            <android.support.v7.widget.CardView
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_columnWeight="1"
                android:layout_rowWeight="1"
                app:cardElevation="8dp"
                android:layout_marginRight="16dp"
                android:layout_marginLeft="16dp"
                android:layout_marginBottom="16dp"
                app:cardCornerRadius="8dp"
                android:padding="0dp">

                <LinearLayout
                    android:layout_gravity="center_horizontal|center_vertical"
                    android:layout_margin="4dp"
                    android:orientation="vertical"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content">

                    <TextView
                        android:text="Mumbai Hackathon"
                        android:textAlignment="center"
                        android:layout_marginTop="6dp"
                        android:textColor="@color/colorPrimary"
                        android:textSize="18sp"
                        android:textStyle="bold"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content" />

                </LinearLayout>

            </android.support.v7.widget.CardView>

            <android.support.v7.widget.CardView
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_columnWeight="1"
                android:layout_rowWeight="1"
                app:cardElevation="8dp"
                android:layout_marginRight="16dp"
                android:layout_marginLeft="16dp"
                android:layout_marginBottom="16dp"
                app:cardCornerRadius="8dp"
                android:padding="0dp">

                <LinearLayout
                    android:layout_gravity="center_horizontal|center_vertical"
                    android:layout_margin="4dp"
                    android:orientation="vertical"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content">

                    <TextView
                        android:text="Game of Codes (GOC)"
                        android:layout_marginTop="6dp"
                        android:textAlignment="center"
                        android:textColor="@color/colorPrimary"
                        android:textSize="18sp"
                        android:textStyle="bold"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content" />

                </LinearLayout>

            </android.support.v7.widget.CardView>

            <android.support.v7.widget.CardView
                android:id="@+id/add_file"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_columnWeight="1"
                android:layout_rowWeight="1"
                app:cardElevation="8dp"
                android:layout_marginRight="16dp"
                android:layout_marginLeft="16dp"
                android:layout_marginBottom="16dp"
                app:cardCornerRadius="8dp">

                <LinearLayout
                    android:layout_gravity="center_horizontal|center_vertical"
                    android:layout_margin="4dp"
                    android:orientation="vertical"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content">

                    <TextView
                        android:text="+\nAdd New File"
                        android:layout_marginTop="6dp"
                        android:textAlignment="center"
                        android:textColor="@color/colorPrimary"
                        android:textSize="18sp"
                        android:textStyle="bold"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content" />

                </LinearLayout>

            </android.support.v7.widget.CardView>

        </GridLayout>
    </LinearLayout>
</ScrollView>

Answer 1

Source: GridLayout (not GridView) how to stretch all children evenly 来源： GridLayout（不是GridView）如何均匀拉伸所有子级

UPDATE : Weights are supported as of API 21. See PaulT's answer for more details. 更新：从API 21开始支持权重。有关更多详细信息，请参见PaulT的答案。 END UPDATE There are limitations when using the GridLayout, the following quote is taken from the documentation . 结束更新使用GridLayout时有局限性，以下引用摘自文档。

"GridLayout does not provide support for the principle of weight, as defined in weight. In general, it is not therefore possible to configure a GridLayout to distribute excess space in non-trivial proportions between multiple rows or columns ... For complete control over excess space distribution in a row or column; use a LinearLayout subview to hold the components in the associated cell group." “ GridLayout不支持按重量定义的重量原理。通常，因此，无法配置GridLayout来以多余的比例在多行或多列之间分配多余的空间...为了完全控制行或列中多余的空间分布；请使用LinearLayout子视图将组件保留在关联的单元格组中。”

Here is a small example that uses LinearLayout subviews. 这是一个使用LinearLayout子视图的小示例。 (I used Space Views that takes up unused area and pushes the buttons into desired position.) （我使用了“空间视图”，该视图占用了未使用的区域并将按钮推到所需位置。）

<GridLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:columnCount="1"
>
    <TextView
        android:text="2x2 button grid"
        android:textSize="32dip"
        android:layout_gravity="center_horizontal" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" android:orientation="horizontal">
        <Space
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_weight="1" />
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Button 1" />
        <Space
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_weight="1" />
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="start"
            android:text="Button 2" />
        <Space
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_weight="1" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
    >
        <Space
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_weight="1" />
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Button 3" />
        <Space
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_weight="1" />
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="start"
            android:text="Button 4" />
        <Space
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_weight="1" />
    </LinearLayout>
</GridLayout>

如何以编程方式设置cardView的columnWeight

问题描述

1 个解决方案

解决方案1
0 2019-06-18 09:27:48

如何以编程方式设置cardView的columnWeight

问题描述

1 个解决方案

解决方案1 0 2019-06-18 09:27:48

解决方案1
0 2019-06-18 09:27:48