How do android:shrinkColumns and android:stretchColumns work?

Question

I can set android:shrinkColumns and android:stretchColumns at TableLayout.

For example:

<TableLayout
    android:shrinkColumns="2,3"
    android:stretchColumns="1,3"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"/>

So how do this properties affects columns?

Answer 1

• android:stretchColumns

  The zero-based index of the columns to stretch. The column indices must be separated by a comma: 1, 2, 5. Illegal and duplicate indices are ignored. You can stretch all columns by using the value "*" instead. Note that a column can be marked stretchable and shrinkable at the same time.

• android:shrinkColumns

  The zero-based index of the columns to shrink. The column indices must be separated by a comma: 1, 2, 5. Illegal and duplicate indices are ignored. You can shrink all columns by using the value "*" instead. Note that a column can be marked stretchable and shrinkable at the same time.

• android:collapseColumns

  The zero-based index of the columns to collapse. The column indices must be separated by a comma: 1, 2, 5. Illegal and duplicate indices are ignored.

  <TableLayout 
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:stretchColumns="*"
  android:background="@color/grey">
  
  <TableRow>
      <TextView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_column="0"
          android:background="@color/red"
          android:textColor="@android:color/white"
          android:textSize="30dp"
          android:text="1" />
  
      <TextView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_column="1"
          android:textColor="@android:color/white"
          android:textSize="30dp"
          android:background="@color/green"
          android:text="2" />
  
      <TextView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_column="2"
          android:textColor="@android:color/white"
          android:textSize="30dp"
          android:background="@color/blue"
          android:text="3" />
  </TableRow>
  
  
  <TableRow>
      <TextView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_column="0"
          android:background="@color/red"
          android:textColor="@android:color/white"
          android:textSize="30dp"
          android:text="1" />
  
      <TextView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_column="1"
          android:textColor="@android:color/white"
          android:textSize="30dp"
          android:background="@color/green"
          android:text="2" />
  
      <TextView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_column="2"
          android:textColor="@android:color/white"
          android:textSize="30dp"
          android:background="@color/blue"
          android:text="3" />
  </TableRow>
  </TableLayout>
  

Explanations:

android:stretchColumns="*"

Means it stretch all columns equally according to table layout width

android:shrinkColumns="*"

Means it shrink all columns

android:shrinkColumns="0,2"

android:stretchColumns="1"

Means column 0 and 2 are wraps contain and column 1 stretch into the available width

android:stretchColumns="0,1,2"

android:shrinkColumns="1"

Means if column already stretch then shrink not apply

android:shrinkColumns="*"

android:collapseColumns="1"

android:collapseColumns means it hides given column

android:stretchColumns="*"

TextView :- android:layout_column="2"

Meaning if table row first column layout parameter does not start with 0 then empty view added into the row

android:stretchColumns="*"

android:collapseColumns="1"

TextView :- android:layout_column="2"

Means if table-row first column layout parameter does not start with 0 then empty view added into row but if you collapse column then added empty view not hide of that column index only hide added view by explicit view

I hope this will help.