获取设备DPI(IOS ，ANDROID)

最新推荐文章于 2023-07-13 12:16:17 发布

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本文介绍了一种用于获取iOS设备像素密度(ppi)的方法，通过查询设备型号来确定像素密度，并提供了一段示例代码。此外，还介绍了如何在Android设备上获取屏幕密度(dpi)，通过使用DisplayMetrics类并调用相应的方法来实现。

ios获取ppi方法：

#include <sys/types.h>#include <sys/sysctl.h>

size_t size; sysctlbyname("hw.machine", NULL, &size, NULL, 0); char *machine = malloc(size); sysctlbyname("hw.machine", machine, &size, NULL, 0); NSString *platform = [NSString stringWithUTF8String:machine]; free(machine); if( [platform hasPrefix:@"iPhone1"] || [platform hasPrefix:@"iPhone2"] || [platform hasPrefix:@"iPhone3"]) return 163.0f; if( [platform hasPrefix:@"iPhone4"] || [platform hasPrefix:@"iPhone5"] || [platform hasPrefix:@"iPhone6"]) return 326.0f; // // For iPhone6+ // Added by Gerry 2014.11.22 10:12 // // Note: iPhone6 326ppi if( [platform hasPrefix:@"iPhone7"]) { return 401.0f; } if( [platform hasPrefix:@"iPhone"]) // catch-all for higher-end devices not yet existing { return 326.0f; } if( [platform hasPrefix:@"iPod1"] || [platform hasPrefix:@"iPod2"] || [platform hasPrefix:@"iPod3"]) return 163.0f; if( [platform hasPrefix:@"iPod4"] || [platform hasPrefix:@"iPod5"]) return 326.0f; if( [platform hasPrefix:@"iPod"]) // catch-all for higher-end devices not yet existing { return 326.0f; } if( [platform hasPrefix:@"iPad1"] || [platform hasPrefix:@"iPad2"]) return 132.0f; if( [platform hasPrefix:@"iPad3"] || [platform hasPrefix:@"iPad4"]) return 264.0f; if( [platform hasPrefix:@"iPad"]) // catch-all for higher-end devices not yet existing { return 264.0f; } if( [platform hasPrefix:@"x86_64"]) { return 132.0f;

}

android 获取DPI方法：

DisplayMetrics dm = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(dm); float density = dm.densityDpi;

return density;