example: android: Fix display scaling issue on some devices

Author: YuKongA

composeApp/src/androidMain/kotlin/top/yukonga/miuix/uitest/MainActivity.kt

@@ -1,9 +1,11 @@
 package top.yukonga.miuix.uitest
 
 import App
+import android.content.res.Resources
 import android.graphics.Color
 import android.os.Build
 import android.os.Bundle
+import android.util.DisplayMetrics
 import androidx.activity.ComponentActivity
 import androidx.activity.SystemBarStyle
 import androidx.activity.compose.setContent
@@ -12,12 +14,29 @@ import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.remember
+import kotlin.math.pow
+import kotlin.math.sqrt
 
 class MainActivity : ComponentActivity() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
+        val displayMetrics = Resources.getSystem().displayMetrics
+        val widthPixels = displayMetrics.widthPixels
+        val heightPixels = displayMetrics.heightPixels
+        val widthInches = widthPixels / displayMetrics.xdpi
+        val heightInches = heightPixels / displayMetrics.ydpi
+        val diagonalPixel = sqrt(widthPixels.toDouble().pow(2.0) + heightPixels.toDouble().pow(2.0))
+        val screenInches = sqrt(widthInches.toDouble().pow(2.0) + heightInches.toDouble().pow(2.0))
+        val actualDensityDpi = diagonalPixel / screenInches
+        val actualDensity = actualDensityDpi / DisplayMetrics.DENSITY_DEFAULT
+
+        val metrics = resources.displayMetrics
+        metrics.density = actualDensity.toFloat()
+        metrics.densityDpi = actualDensityDpi.toInt()
+        resources.displayMetrics.setTo(metrics)
+
         setContent {
             val colorMode = remember { mutableIntStateOf(0) }
             val darkMode = colorMode.intValue == 2 || (isSystemInDarkTheme() && colorMode.intValue == 0)