LinearLayout Example

Let’s look at an example () that shows LinearLayout properties set both in the XML layout file and at runtime.

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Note that we have a wrapping two sets. is a subclass of , so our example demonstrates nested boxes as if they were all containers.

The top sets up a row () of widgets. The has of padding on all sides, separating it from the other . The width and height are both set to , so the radio buttons will take up only the space that they need.

The bottom is a column () of three widgets. Again, we have of padding on all sides and a “natural” height (). However, we have set to be , meaning the column of radio buttons “claims” the entire width of the screen.

To adjust these settings at runtime based on user input, we need some Java code:

Package

Import

Import

Import

Import

Import

Import

Import

Public class extends

Implements

Public onCreate

Super onCreate

SetContentView

FindViewById

SetOnCheckedChangeListener this

FindViewById

SetOnCheckedChangeListener this

Public onCheckedChanged

If

If

SetOrientation

Else

SetOrientation

Else if

If

SetGravity

Else if

SetGravity

Else if