XXHDPI 的 Android 背景图像大小

Question

我需要为我的应用程序设置背景图片，唯一的问题是我不知道 XXHDPI 设备的图片大小。

我在这里阅读了 MDPI、HDPI 和 XHDPI 设备，但没有阅读 XXHDPI： Android splash screen image sizes to fit all devices

那么，drawable-xxhdpi 文件夹的背景必须是多大？

Answer 1

你需要this

还有这个： MDPI：x1， HDPI：x1.5， XHDPI: x2, XXHDPI: x3

Answer 2

MDPI 是您的基准。表示基本尺寸，约为 160dpi。每隔一个密度限定符都是根据基线计算的

HDPI 为 1.5*MDPI

XHDPI 是 2*MPDI

XXHDPI 是 3*MDPI

XXXHDPI 是 4*MDPI

或者，查看此表以获得更好的描述

| Density Qualifier | Factor                 | DPI  | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|-------------------|------------------------|------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ldpi              | MDPI / 1.33            | ~120 | Resources for low-density (ldpi) screens (~120dpi).                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| mdpi              | MDPI * 1               | ~160 | Resources for medium-density (mdpi) screens (~160dpi). (This is the baseline density.)                                                                                                                                                                                                                                                                                                                                                                                                                       |
| hdpi              | MDPI * 1.5             | ~240 | Resources for high-density (hdpi) screens (~240dpi).                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| xhdpi             | MDPI * 2               | ~320 | Resources for extra-high-density (xhdpi) screens (~320dpi).                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
| xxhdpi            | MDPI * 3               | ~480 | Resources for extra-extra-high-density (xxhdpi) screens (~480dpi).                                                                                                                                                                                                                                                                                                                                                                                                                                           |
| xxxhdpi           | MDPI * 4               | ~640 | Resources for extra-extra-extra-high-density (xxxhdpi) uses (~640dpi).                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| nodpi             | See description        | n/a  | Resources for all densities. These are density-independent resources. The system does not scale resources tagged with this qualifier, regardless of the current screen's density.                                                                                                                                                                                                                                                                                                                            |
| tvdpi             | Recommended: MDPI*1.33 | ~213 | Resources for screens somewhere between mdpi and hdpi; approximately 213dpi. This is not considered a "primary" density group. It is mostly intended for televisions and most apps shouldn't need it—providing mdpi and hdpi resources is sufficient for most apps and the system will scale them as appropriate. If you find it necessary to provide tvdpi resources, you should size them at a factor of 1.33*mdpi. For example, a 100px x 100px image for mdpi screens should be 133px x 133px for tvdpi. |

查看此图片了解更多信息

来源：https://developer.android.com/training/multiscreen/screendensities