size property Null safety

Size size
final

The size of the media in logical pixels (e.g, the size of the screen).

Logical pixels are roughly the same visual size across devices. Physical pixels are the size of the actual hardware pixels on the device. The number of physical pixels per logical pixel is described by the devicePixelRatio.

Troubleshooting

It is considered bad practice to cache and later use the size returned by MediaQuery.of(context).size. It will make the application non responsive and might lead to unexpected behaviors. For instance, during startup, especially in release mode, the first returned size might be (0,0). The size will be updated when the native platform reports the actual resolution.

See the article on Creating responsive and adaptive apps for an introduction.

See also:

Implementation

final Size size;