Get screen width and height in Android

Question

How can I get the screen width and height and use this value in:

@Override protected void onMeasure(int widthSpecId, int heightSpecId) {
    Log.e(TAG, \"onM         


        

Answer 1

• Kotlin Version via Extension Property

If you want to know the size of the screen in pixels as well as dp, using these extension properties really helps:

DimensionUtils.kt

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

/**
 * @author aminography
 */

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()

Usage:

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")
    }
}

Result:

When the device is in portrait orientation:

[PX] screen width: 1440 , height: 2392
[DP] screen width: 360.0 , height: 598.0

When the device is in landscape orientation:

[PX] screen width: 2392 , height: 1440
[DP] screen width: 598.0 , height: 360.0