自定义图标

tool/check_icon_size.ps1

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+Add-Type -AssemblyName System.Drawing
+$img = [System.Drawing.Image]::FromFile('d:\UserData\Desktop\my_proj\mooknote\assets\icon\app_icon.png')
+Write-Host ('app_icon: ' + $img.Width + 'x' + $img.Height)
+$img.Dispose()
+$img2 = [System.Drawing.Image]::FromFile('d:\UserData\Desktop\my_proj\mooknote\assets\icon\app_icon2.png')
+Write-Host ('app_icon2: ' + $img2.Width + 'x' + $img2.Height)
+$img2.Dispose()
+
+$sizes = @(48, 72, 96, 144, 192)
+foreach ($size in $sizes) {
+    $f = [System.Drawing.Image]::FromFile('d:\UserData\Desktop\my_proj\mooknote\android\app\src\main\res\mipmap-mdpi\ic_launcher2.png')
+    Write-Host ('ic_launcher2 mdpi: ' + $f.Width + 'x' + $f.Height)
+    $f.Dispose()
+    break
+}

tool/generate_icon2.ps1

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+$source = 'd:\UserData\Desktop\my_proj\mooknote\assets\icon\app_icon2.png'
+$sizes = @{
+    'mipmap-mdpi' = 48
+    'mipmap-hdpi' = 72
+    'mipmap-xhdpi' = 96
+    'mipmap-xxhdpi' = 144
+    'mipmap-xxxhdpi' = 192
+}
+
+Add-Type -AssemblyName System.Drawing
+$original = [System.Drawing.Image]::FromFile($source)
+
+foreach ($dir in $sizes.Keys) {
+    $size = $sizes[$dir]
+    $bitmap = New-Object System.Drawing.Bitmap($size, $size)
+    $graphics = [System.Drawing.Graphics]::FromImage($bitmap)
+    $graphics.InterpolationMode = [System.Drawing.Drawing2D.InterpolationMode]::HighQualityBicubic
+    $graphics.DrawImage($original, 0, 0, $size, $size)
+    $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${size})"
+}
+
+$original.Dispose()
+Write-Host "Done!"

tool/generate_icon2_with_padding.ps1

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+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!"