Supporting Multiple Screens - 換算

算式

• px = dp * (dpi / 160)
• dp = px /(dpi/160)
• dpi type = squrt(xx + yy) / inch
• sqrt(xx + yy) / dpi type = inch

Examples:

• not2 5.5" 1280*720 pixels
• 267 dpi -> xhdpi
• Amazon Kindle Fire HD 7" 16GB 7" 1280 x 800 pixels
• Google Nexus 7 16GB 7" 1280 x 800 pixels
• 191 dpi -> hdpi
• ASUS Eee Pad Transformer Prime TF201 32GB 10.1" 1280 x 800 pixels
• SAMSUNG GALAXY Note 10.1 Wi-Fi 10.1" 1280 x 800 pixels
• 132 dp -> mdpi

dpi

• ldpi: ~ 120 dpi
• mdpi: 120 dpi ~ 160 dpi
• hdpi: 160 dpi ~ 240 dpi
• xhdpi: 240 dpi ~ 320 dpi

dp to screen size examples:

• 480 dp
• 480 mdpi
• 480 px -> 4" ~ 3"
• 720 hdpi
• 1080 px -> 9.5" ~ 6.3"
• 960 xhdpi
• 1920 px -> 11.3" ~ 8.4"
• 600 dp, about 7"
• 600 mdpi
• 600 px -> 7" ~ 5.3"
• 900 hdpi
• 1350 px -> 11.9" ~ 7.9"
• 1920 xhdpi
• 3840 px -> 22.6" ~ 16.9"