RecyclerView

Question

我想在android中创建一个网格，其中假设

1. if i pass an arraylist with 5 elements first row should have 3 columns and next row should have 2 columns with centered
2. 如果我传递带有6个元素的arraylist，则第一行应该有3列，而下一行应该有3列
3. if i pass an arraylist with 7 elements first row should have 3 columns, next row should have 3 columns and next row should have 1 column with centered

Answer 1

我建议您使用FlexBoxLayout。它与CSS的... LEFT JOIN t3 ON t1.CareID = t3.CareID AND t1.Username = t3.Username AND t1.Date <= t3.Date GROUP BY t1.ID, t1.Date, t2.Type, t1.Username ... 类似，完全符合您的需求。

只需向Gradle添加依赖：

FlexBox

将布局放在.xml文件中：

dependencies {
    compile 'com.google.android:flexbox:0.2.3'
}

并动态添加视图的子项：

<com.google.android.flexbox.FlexboxLayout/>