Second Activity and bitmap

app/build.gradle.kts

@@ -11,7 +11,7 @@ android {
 
     defaultConfig {
         applicationId = "com.mirenkov.ktheightmap"
-        minSdk = 24
+        minSdk = 26
         targetSdk = 35
         versionCode = 1
         versionName = "1.0"
@@ -44,6 +44,9 @@ dependencies {
     implementation(libs.androidx.room.common.jvm)
     implementation(libs.androidx.room.runtime.android)
     implementation(libs.androidx.lifecycle.viewmodel.compose.android)
+    implementation(libs.androidx.appcompat)
+    implementation(libs.material)
+    implementation(libs.androidx.activity)
     val room_version = "2.7.2"
 
     ksp("androidx.room:room-compiler:$room_version")

app/src/main/AndroidManifest.xml

@@ -12,6 +12,9 @@
         android:supportsRtl="true"
         android:theme="@style/Theme.KtHeightMap"
         tools:targetApi="31">
+        <activity
+            android:name=".SettingsActivity"
+            android:exported="false" />
         <activity
             android:name=".MainActivity"
             android:exported="true"

app/src/main/java/com/mirenkov/ktheightmap/Config.kt

@@ -0,0 +1,12 @@
+package com.mirenkov.ktheightmap
+
+class Config {
+    companion object {
+        private var INSTANCE: Config = Config()
+        fun getInstance(): Config {
+            synchronized(this) {
+                return INSTANCE
+            }
+        }
+    }
+}

app/src/main/java/com/mirenkov/ktheightmap/MainActivity.kt

@@ -1,6 +1,7 @@
 package com.mirenkov.ktheightmap
 
 import android.app.Application
+import android.content.Intent
 import android.os.Bundle
 import android.util.Log
 import androidx.activity.ComponentActivity
@@ -80,9 +81,11 @@ fun Main(vm: TileViewModel = viewModel()) {
 
 @Composable
 fun ToolButton() {
+    val context = LocalContext.current
     FloatingActionButton(
         onClick = {
-            Log.i(TAG, "Hello, gryadki!")
+            val intent = Intent(context, SettingsActivity::class.java)
+            context.startActivity(intent)
         }
     ) { Icon(Icons.Filled.Build, contentDescription = "Tools") }
 }

app/src/main/java/com/mirenkov/ktheightmap/SettingsActivity.kt

@@ -0,0 +1,18 @@
+package com.mirenkov.ktheightmap
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import com.mirenkov.ktheightmap.ui.theme.KtHeightMapTheme
+
+class SettingsActivity : ComponentActivity() {
+        override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContent {
+            KtHeightMapTheme {
+            }
+        }
+    }
+}

app/src/main/java/com/mirenkov/ktheightmap/Tile.kt

@@ -1,8 +1,10 @@
 package com.mirenkov.ktheightmap
 
+import android.graphics.Bitmap
+import android.graphics.BitmapFactory
 import androidx.room.ColumnInfo
 import androidx.room.Entity
-import androidx.room.PrimaryKey
+import java.util.Base64
 
 @Entity(tableName = "tiles", primaryKeys = [ "x", "y", "level" ])
 class Tile {
@@ -18,13 +20,26 @@ class Tile {
     @ColumnInfo(name = "data")
     var base64: String? = null
 
-
-
-    constructor() {}
+    constructor()
 
     constructor(x: Int, y: Int, level: Int) {
         this.x = x
         this.y = y
         this.level = level
     }
+
+    constructor(x: Int, y: Int, level: Int, base64: String) {
+        this.x = x
+        this.y = y
+        this.level = level
+        this.base64 = base64
+    }
+
+    fun getBitmap(): Bitmap? {
+        if (this.base64 == null)
+            return null
+        val ba = Base64.getDecoder().decode(this.base64)
+        val bmp = BitmapFactory.decodeByteArray(ba, 0, ba.size)
+        return bmp
+    }
 }