自定义图标

tool/generate_icon2_with_padding.ps1

@@ -0,0 +1,43 @@
+Add-Type -AssemblyName System.Drawing
+
+$source = 'd:\UserData\Desktop\my_proj\mooknote\assets\icon\app_icon2.png'
+$original = [System.Drawing.Image]::FromFile($source)
+
+# 目标尺寸（和 flutter_launcher_icons 一致）
+$sizes = @{
+    'mipmap-mdpi' = 48
+    'mipmap-hdpi' = 72
+    'mipmap-xhdpi' = 96
+    'mipmap-xxhdpi' = 144
+    'mipmap-xxxhdpi' = 192
+}
+
+foreach ($dir in $sizes.Keys) {
+    $size = $sizes[$dir]
+    
+    # 创建带透明背景的画布
+    $bitmap = New-Object System.Drawing.Bitmap($size, $size, [System.Drawing.Imaging.PixelFormat]::Format32bppArgb)
+    $graphics = [System.Drawing.Graphics]::FromImage($bitmap)
+    $graphics.InterpolationMode = [System.Drawing.Drawing2D.InterpolationMode]::HighQualityBicubic
+    $graphics.SmoothingMode = [System.Drawing.Drawing2D.SmoothingMode]::HighQuality
+    
+    # 计算缩放比例，保持宽高比并添加内边距（模拟 flutter_launcher_icons 的行为）
+    $padding = [math]::Round($size * 0.1)  # 10% padding
+    $drawSize = $size - 2 * $padding
+    
+    # 居中绘制
+    $x = $padding
+    $y = $padding
+    $graphics.DrawImage($original, $x, $y, $drawSize, $drawSize)
+    
+    $graphics.Dispose()
+    
+    $output = "d:\UserData\Desktop\my_proj\mooknote\android\app\src\main\res\$dir\ic_launcher2.png"
+    $bitmap.Save($output, [System.Drawing.Imaging.ImageFormat]::Png)
+    $bitmap.Dispose()
+    
+    Write-Host "Generated $output (${size}x${size}) with padding"
+}
+
+$original.Dispose()
+Write-Host "Done!"