Screen height | width programmatically

[ch8n]

Source

https://stackoverflow.com/questions/4743116/get-screen-width-and-height-in-android

Topic Covered

• How to calculate height and width of view programmatically

[ch8n]

Extension to add

import android.content.res.Resources
import android.graphics.Rect
import android.graphics.RectF
import android.util.DisplayMetrics
import kotlin.math.roundToInt

private val displayMetrics: DisplayMetrics by lazy { Resources.getSystem().displayMetrics }

val screenRectPx: Rect
    get() = displayMetrics.run { Rect(0, 0, widthPixels, heightPixels) }

val screenRectDp: RectF
    get() = displayMetrics.run { RectF(0f, 0f, widthPixels.px2dp, heightPixels.px2dp) }

val Number.px2dp: Float
    get() = this.toFloat() / displayMetrics.density

val Number.dp2px: Int
    get() = (this.toFloat() * displayMetrics.density).roundToInt()

How to Use

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val widthPx = screenRectPx.width()
        val heightPx = screenRectPx.height()
        println("[PX] screen width: $widthPx , height: $heightPx")

        val widthDp = screenRectDp.width()
        val heightDp = screenRectDp.height()
        println("[DP] screen width: $widthDp , height: $heightDp")
    }
}