refactor: rewrite mobile app in Compose and add error handling for wear

mobile/src/main/java/ru/omni_devel/cards/ShowCardActivity.kt

@@ -2,35 +2,61 @@ package ru.omni_devel.cards
 
 import android.os.Bundle
 import android.view.WindowManager
-import android.widget.ImageView
-import android.widget.TextView
 import android.widget.Toast
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
-import androidx.appcompat.app.AppCompatActivity
-import androidx.core.view.ViewCompat
-import androidx.core.view.WindowInsetsCompat
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.ImageBitmap
+import androidx.compose.ui.graphics.asImageBitmap
+import androidx.compose.ui.layout.ContentScale
+import androidx.compose.ui.text.style.TextAlign
+import ru.omni_devel.cards.ui.theme.OmniCardsTheme
 
-class ShowCardActivity : AppCompatActivity() {
+class ShowCardActivity : ComponentActivity() {
     private lateinit var db: DbHelper
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         enableEdgeToEdge()
-        setContentView(R.layout.activity_show_card)
-        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
-            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
-            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
-            insets
-        }
 
         db = DbHelper(this, null)
+
+        val cardId = intent.getIntExtra("cardId", -1)
+
+        val cardInfo = db.getCard(cardId)
+
+        if (cardInfo == null) {
+            Toast.makeText(this, "Card is not exists", Toast.LENGTH_LONG).show()
+            finish()
+
+            return
+        }
+
+        setContent {
+            OmniCardsTheme {
+                Scaffold(modifier = Modifier.fillMaxSize()) { innerPadding ->
+                    ShowCardPage(innerPadding, cardInfo)
+                }
+            }
+        }
     }
 
     override fun onResume() {
         super.onResume()
 
-        setBrightness(1.0f)
-        renderCard()
+        setBrightness(1f)
     }
 
     override fun onPause() {
@@ -39,31 +65,46 @@ class ShowCardActivity : AppCompatActivity() {
         setBrightness(WindowManager.LayoutParams.BRIGHTNESS_OVERRIDE_NONE)
     }
 
-    private fun renderCard() {
-        val cardId = intent.getIntExtra("cardId", 0)
-
-        val cardInfo = db.getCard(cardId)
-
-        if (cardInfo == null) {
-            Toast.makeText(this, "cardInfo is null", Toast.LENGTH_LONG).show()
-            return
-        }
-
-        val cardCodeView: ImageView = findViewById(R.id.cardCodeView)
-        val cardNameElement: TextView = findViewById(R.id.editCardActionLabel)
-
-        cardNameElement.text = cardInfo.name
-
-        val code = generateCode(cardInfo.codeValue, cardInfo.codeType)
-
-        cardCodeView.setImageBitmap(code)
-    }
-
     private fun setBrightness(level: Float) {
-        val params = window.attributes
-
-        params.screenBrightness = level
-
-        window.attributes = params
+        window.attributes.screenBrightness = level
     }
-}
+}
+
+@Composable
+fun ShowCardPage(innerPadding: PaddingValues, cardInfo: CardInfo) {
+    val bitmap = remember(cardInfo) {
+        try {
+            generateCode(cardInfo.codeValue, cardInfo.codeType).asImageBitmap()
+        } catch (_: Exception) {
+            null
+        }
+    }
+
+    Page(cardInfo.name, innerPadding) {
+        Column(
+            modifier = Modifier.fillMaxSize(),
+            verticalArrangement = Arrangement.Center
+        ) {
+            if (bitmap != null) {
+                Image(
+                    bitmap = bitmap,
+                    contentDescription = cardInfo.codeValue,
+                    modifier = Modifier.fillMaxWidth(),
+                    contentScale = ContentScale.FillWidth
+                )
+                Text(
+                    cardInfo.codeValue,
+                    modifier = Modifier.fillMaxWidth(),
+                    textAlign = TextAlign.Center
+                )
+            } else {
+                Text(
+                    "Failed to generate code. Check card data",
+                    modifier = Modifier.fillMaxWidth(),
+                    textAlign = TextAlign.Center,
+                    color = MaterialTheme.colorScheme.error
+                )
+            }
+        }
+    }
+}