HybridWidthActivity.kt

package com.leonidivankin.draftandroid.articles.benchmark

import android.os.Bundle
import android.util.Log
import android.widget.LinearLayout
import androidx.appcompat.app.AppCompatActivity
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.platform.ComposeView
import androidx.compose.ui.unit.dp
import androidx.core.view.children
import com.leonidivankin.draftandroid.R

class HybridWidthActivity : AppCompatActivity() {
    var time = 0L

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        title = "hybrid: xml+compose, width"
        val colors = listOf(
            0xFFF44336,
            0xFFE91E63,
            0xFF9C27B0,
            0xFF673AB7,
            0xFF3F51B5,
            0xFF2196F3,
            0xFF03A9F4,
            0xFF00BCD4,
            0xFF009688,
            0xFF4CAF50,
            0xFF8BC34A,
            0xFFCDDC39,
            0xFFFFEB3B,
            0xFFFFC107,
            0xFFFF9800,
            0xFFFF5722
        )
        time = System.currentTimeMillis()
        setContentView(R.layout.activity_hybrid_width)

        findViewById<LinearLayout>(R.id.hybridWidthLinearLayout).children.forEachIndexed { index, view ->
            (view as ComposeView).setContent { MyBox(colors[index % colors.size]) }
        }
    }

    override fun onResume() {
        super.onResume()
        Log.d("Benchmark", "HybridWidthActivity onResume: ${System.currentTimeMillis() - time}")
    }

    override fun onWindowFocusChanged(hasFocus: Boolean) {
        super.onWindowFocusChanged(hasFocus)
        if (hasFocus) {
            Log.d(
                "Benchmark",
                "HybridWidthActivity onWindowFocusChanged: ${System.currentTimeMillis() - time}"
            )
        }
    }
}

@Composable
private fun MyBox(color: Long) {
    Box(
        Modifier
            .fillMaxWidth()
            .height(8.dp)
            .background(color = Color(color))
    )
}