{"id":831,"date":"2013-11-05T11:06:46","date_gmt":"2013-11-05T03:06:46","guid":{"rendered":"http:\/\/blog.dayandcarrot.net\/?p=831"},"modified":"2013-11-05T11:06:46","modified_gmt":"2013-11-05T03:06:46","slug":"%e3%80%90%e8%bd%ac%e8%bd%bd%e3%80%91android%e9%97%ae%e7%ad%94-px%e3%80%81dp%e5%92%8csp%ef%bc%8c%e8%bf%99%e4%ba%9b%e5%8d%95%e4%bd%8d%e6%9c%89%e4%bb%80%e4%b9%88%e5%8c%ba%e5%88%ab%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/dayandcarrot.space\/?p=831","title":{"rendered":"\u3010\u8f6c\u8f7d\u3011[Android\u95ee\u7b54] px\u3001dp\u548csp\uff0c\u8fd9\u4e9b\u5355\u4f4d\u6709\u4ec0\u4e48\u533a\u522b\uff1f"},"content":{"rendered":"<p>\u539f\u6587\u89c1\uff1a<a href=\"http:\/\/www.cnblogs.com\/bjzhanghao\/archive\/2012\/11\/06\/2757300.html\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/www.cnblogs.com\/bjzhanghao\/archive\/2012\/11\/06\/2757300.html<\/a><br \/>\n\u76f8\u4fe1\u6bcf\u4e2aAndroid\u65b0\u624b\u90fd\u4f1a\u9047\u5230\u8fd9\u4e2a\u95ee\u9898\uff0c\u5e0c\u671b\u8fd9\u7bc7\u5e16\u5b50\u80fd\u8ba9\u4f60\u4e0d\u518d\u7ea0\u7ed3\u3002<\/p>\n<h3>px\uff1a<\/h3>\n<p>\u5373\u50cf\u7d20\uff0c1px\u4ee3\u8868\u5c4f\u5e55\u4e0a\u4e00\u4e2a\u7269\u7406\u7684\u50cf\u7d20\u70b9\uff1b<br \/>\npx\u5355\u4f4d\u4e0d\u88ab\u5efa\u8bae\u4f7f\u7528\uff0c\u56e0\u4e3a\u540c\u6837100px\u7684\u56fe\u7247\uff0c\u5728\u4e0d\u540c\u624b\u673a\u4e0a\u663e\u793a\u7684\u5b9e\u9645\u5927\u5c0f\u53ef\u80fd\u4e0d\u540c\uff0c\u5982\u4e0b\u56fe\u6240\u793a\u3002<br \/>\n<img loading=\"lazy\" decoding=\"async\" alt=\"\" src=\"http:\/\/developer.android.com\/images\/screens_support\/density-test-bad.png\" width=\"732\" height=\"174\" \/><\/p>\n<h3>dp\uff1a<\/h3>\n<p>\u8fd9\u4e2a\u662f\u6700\u5e38\u7528\u4f46\u4e5f\u6700\u96be\u7406\u89e3\u7684\u5c3a\u5bf8\u5355\u4f4d\u3002\u5b83\u4e0e\u201c\u50cf\u7d20\u5bc6\u5ea6\u201d\u5bc6\u5207\u76f8\u5173\uff0c\u6240\u4ee5\u9996\u5148\u6211\u4eec\u89e3\u91ca\u4e00\u4e0b\u4ec0\u4e48\u662f\u50cf\u7d20\u5bc6\u5ea6\u3002\u5047\u8bbe\u6709\u4e00\u90e8\u624b\u673a\uff0c\u5c4f\u5e55\u7684\u7269\u7406\u5c3a\u5bf8\u4e3a1.5\u82f1\u5bf8x2\u82f1\u5bf8\uff0c\u5c4f\u5e55\u5206\u8fa8\u7387\u4e3a240&#215;320\uff0c\u5219\u6211\u4eec\u53ef\u4ee5\u8ba1\u7b97\u51fa\u5728\u8fd9\u90e8\u624b\u673a\u7684\u5c4f\u5e55\u4e0a\uff0c\u6bcf\u82f1\u5bf8\u5305\u542b\u7684\u50cf\u7d20\u70b9\u7684\u6570\u91cf\u4e3a240\/1.5=160dpi\uff08\u6a2a\u5411\uff09\u6216320\/2=160dpi\uff08\u7eb5\u5411\uff09\uff0c160dpi\u5c31\u662f\u8fd9\u90e8\u624b\u673a\u7684\u50cf\u7d20\u5bc6\u5ea6\uff0c\u50cf\u7d20\u5bc6\u5ea6\u7684\u5355\u4f4ddpi\u662fDots Per Inch\u7684\u7f29\u5199\uff0c\u5373\u6bcf\u82f1\u5bf8\u50cf\u7d20\u6570\u91cf\u3002\u6a2a\u5411\u548c\u7eb5\u5411\u7684\u8fd9\u4e2a\u503c\u90fd\u662f\u76f8\u540c\u7684\uff0c\u539f\u56e0\u662f\u5927\u90e8\u5206\u624b\u673a\u5c4f\u5e55\u4f7f\u7528\u6b63\u65b9\u5f62\u7684\u50cf\u7d20\u70b9\u3002<br \/>\n\u4e0d\u540c\u7684\u624b\u673a\/\u5e73\u677f\u53ef\u80fd\u5177\u6709\u4e0d\u540c\u7684\u50cf\u7d20\u5bc6\u5ea6\uff0c\u4f8b\u5982\u540c\u4e3a4\u5bf8\u624b\u673a\uff0c\u6709480&#215;320\u5206\u8fa8\u7387\u7684\u4e5f\u6709800&#215;480\u5206\u8fa8\u7387\u7684\uff0c\u524d\u8005\u7684\u50cf\u7d20\u5bc6\u5ea6\u5c31\u6bd4\u8f83\u4f4e\u3002Android\u7cfb\u7edf\u5b9a\u4e49\u4e86\u56db\u79cd\u50cf\u7d20\u5bc6\u5ea6\uff1a\u4f4e\uff08120dpi\uff09\u3001\u4e2d\uff08160dpi\uff09\u3001\u9ad8\uff08240dpi\uff09\u548c\u8d85\u9ad8\uff08320dpi\uff09\uff0c\u5b83\u4eec\u5bf9\u5e94\u7684dp\u5230px\u7684\u7cfb\u6570\u5206\u522b\u4e3a0.75\u30011\u30011.5\u548c2\uff0c\u8fd9\u4e2a\u7cfb\u6570\u4e58\u4ee5dp\u957f\u5ea6\u5c31\u662f\u50cf\u7d20\u6570\u3002\u4f8b\u5982\u754c\u9762\u4e0a\u6709\u4e00\u4e2a\u957f\u5ea6\u4e3a\u201c80dp\u201d\u7684\u56fe\u7247\uff0c\u90a3\u4e48\u5b83\u5728240dpi\u7684\u624b\u673a\u4e0a\u5b9e\u9645\u663e\u793a\u4e3a80&#215;1.5=120px\uff0c\u5728320dpi\u7684\u624b\u673a\u4e0a\u5b9e\u9645\u663e\u793a\u4e3a80&#215;2=160px\u3002\u5982\u679c\u4f60\u62ff\u8fd9\u4e24\u90e8\u624b\u673a\u653e\u5728\u4e00\u8d77\u5bf9\u6bd4\uff0c\u4f1a\u53d1\u73b0\u8fd9\u4e2a\u56fe\u7247\u7684\u7269\u7406\u5c3a\u5bf8\u201c\u5dee\u4e0d\u591a\u201d\uff0c\u8fd9\u5c31\u662f\u4f7f\u7528dp\u4f5c\u4e3a\u5355\u4f4d\u7684\u6548\u679c\uff0c\u89c1\u4e0b\u56fe\u3002<br \/>\n<img decoding=\"async\" alt=\"\" src=\"http:\/\/developer.android.com\/images\/screens_support\/density-test-good.png\" \/><\/p>\n<h3>dip\uff1a<\/h3>\n<p>\u4e0edp\u5b8c\u5168\u76f8\u540c\uff0c\u53ea\u662f\u540d\u5b57\u4e0d\u540c\u800c\u5df2\u3002\u5728\u65e9\u671f\u7684Android\u7248\u672c\u91cc\u591a\u4f7f\u7528dip\uff0c\u540e\u6765\u4e3a\u4e86\u4e0esp\u7edf\u4e00\u5c31\u5efa\u8bae\u4f7f\u7528dp\u8fd9\u4e2a\u540d\u5b57\u4e86\u3002<\/p>\n<h3>sp\uff1a<\/h3>\n<p>\u4e0e\u7f29\u653e\u65e0\u5173\u7684\u62bd\u8c61\u50cf\u7d20\uff08Scale-independent Pixel\uff09\u3002sp\u548cdp\u5f88\u7c7b\u4f3c\u4f46\u552f\u4e00\u7684\u533a\u522b\u662f\uff0cAndroid\u7cfb\u7edf\u5141\u8bb8\u7528\u6237\u81ea\u5b9a\u4e49\u6587\u5b57\u5c3a\u5bf8\u5927\u5c0f\uff08\u5c0f\u3001\u6b63\u5e38\u3001\u5927\u3001\u8d85\u5927\u7b49\u7b49\uff09\uff0c\u5f53\u6587\u5b57\u5c3a\u5bf8\u662f\u201c\u6b63\u5e38\u201d\u65f61sp=1dp=0.00625\u82f1\u5bf8\uff0c\u800c\u5f53\u6587\u5b57\u5c3a\u5bf8\u662f\u201c\u5927\u201d\u6216\u201c\u8d85\u5927\u201d\u65f6\uff0c1sp&gt;1dp=0.00625\u82f1\u5bf8\u3002\u7c7b\u4f3c\u6211\u4eec\u5728windows\u91cc\u8c03\u6574\u5b57\u4f53\u5c3a\u5bf8\u4ee5\u540e\u7684\u6548\u679c\u2014\u2014\u7a97\u53e3\u5927\u5c0f\u4e0d\u53d8\uff0c\u53ea\u6709\u6587\u5b57\u5927\u5c0f\u6539\u53d8\u3002<br \/>\n\u8fd8\u6709\u51e0\u4e2a\u6bd4\u8f83\u5c11\u7528\u5230\u7684\u5c3a\u5bf8\u5355\u4f4d\uff1a<\/p>\n<h3>mm\uff1a<\/h3>\n<p>\u5373\u6beb\u7c73\uff1b<\/p>\n<h3>in\uff1a<\/h3>\n<p>\u5373\u82f1\u5bf8\uff0c1\u82f1\u5bf8=2.54\u5398\u7c73\uff08\u7ea6\uff09\uff1b<\/p>\n<h3>pt\uff1a<\/h3>\n<p>1pt=1\/72\u82f1\u5bf8=0.035\u5398\u7c73\uff1b<br \/>\n\u6700\u4f73\u5b9e\u8df5\uff0c<strong>\u6587\u5b57\u7684\u5c3a\u5bf8\u4e00\u5f8b\u7528sp\u5355\u4f4d\uff0c\u975e\u6587\u5b57\u7684\u5c3a\u5bf8\u4e00\u5f8b\u4f7f\u7528dp\u5355\u4f4d<\/strong>\u3002\u4f8b\u5982textSize=&#8221;16sp&#8221;\u3001layout_width=&#8221;60dp&#8221;\uff1b\u5076\u5c14\u9700\u8981\u4f7f\u7528px\u5355\u4f4d\uff0c\u4f8b\u5982\u9700\u8981\u5728\u5c4f\u5e55\u4e0a\u753b\u4e00\u6761\u7ec6\u7684\u5206\u9694\u7ebf\u65f6\uff1a<\/p>\n<div>\n<code lang=\"java\"><br \/>\n<view layout_width=\"match_parent\" layout_height=\"1px\"\/><br \/>\n<\/code>\n<\/div>\n<p>\u53c2\u8003\u8d44\u6599\uff1a<br \/>\n<a href=\"http:\/\/stackoverflow.com\/questions\/2025282\/difference-of-px-dp-dip-and-sp-in-android\">Difference of px, dp, dip and sp in Android?\u00a0<\/a><a href=\"http:\/\/developer.android.com\/guide\/practices\/screens_support.html\"><br \/>\nSupporting Multiple Screens<\/a><br \/>\n<a href=\"http:\/\/developers.androidcn.com\/reference\/android\/util\/DisplayMetrics.html\">DisplayMetrics<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u539f\u6587\u89c1\uff1ahttp:\/\/www.cnblogs.com\/bjzhanghao\/archive\/2012\/11\/06\/2757300.html \u76f8\u4fe1\u6bcf\u4e2aAndroid\u65b0\u624b\u90fd\u4f1a\u9047\u5230\u8fd9\u4e2a\u95ee\u9898\uff0c\u5e0c\u671b\u8fd9\u7bc7\u5e16\u5b50\u80fd\u8ba9\u4f60\u4e0d\u518d\u7ea0\u7ed3\u3002 px\uff1a \u5373\u50cf\u7d20\uff0c1px\u4ee3\u8868\u5c4f\u5e55\u4e0a\u4e00\u4e2a\u7269\u7406\u7684\u50cf\u7d20\u70b9\uff1b px\u5355\u4f4d\u4e0d\u88ab\u5efa\u8bae\u4f7f\u7528\uff0c\u56e0\u4e3a\u540c\u6837100px\u7684\u56fe\u7247\uff0c\u5728\u4e0d\u540c\u624b\u673a\u4e0a\u663e\u793a\u7684\u5b9e\u9645\u5927\u5c0f\u53ef\u80fd\u4e0d\u540c\uff0c\u5982\u4e0b\u56fe\u6240\u793a\u3002 dp\uff1a \u8fd9\u4e2a\u662f\u6700\u5e38\u7528\u4f46\u4e5f\u6700\u96be\u7406\u89e3\u7684\u5c3a\u5bf8\u5355\u4f4d\u3002\u5b83\u4e0e\u201c\u50cf\u7d20\u5bc6\u5ea6\u201d\u5bc6\u5207\u76f8\u5173\uff0c\u6240\u4ee5\u9996\u5148\u6211\u4eec\u89e3\u91ca\u4e00\u4e0b\u4ec0\u4e48\u662f\u50cf\u7d20\u5bc6\u5ea6\u3002\u5047\u8bbe\u6709\u4e00\u90e8\u624b\u673a\uff0c\u5c4f\u5e55\u7684\u7269\u7406\u5c3a\u5bf8\u4e3a1.5\u82f1\u5bf8x2\u82f1\u5bf8\uff0c\u5c4f\u5e55\u5206\u8fa8\u7387\u4e3a240&#215;320\uff0c\u5219\u6211\u4eec\u53ef\u4ee5\u8ba1\u7b97\u51fa\u5728\u8fd9\u90e8\u624b\u673a\u7684\u5c4f\u5e55\u4e0a\uff0c\u6bcf\u82f1\u5bf8\u5305\u542b\u7684\u50cf\u7d20\u70b9\u7684\u6570\u91cf\u4e3a240\/1.5=160dpi\uff08\u6a2a\u5411\uff09\u6216320\/2=160dpi\uff08\u7eb5\u5411\uff09\uff0c160dpi\u5c31\u662f\u8fd9\u90e8\u624b\u673a\u7684\u50cf\u7d20\u5bc6\u5ea6\uff0c\u50cf\u7d20\u5bc6\u5ea6\u7684\u5355\u4f4ddpi\u662fDots Per Inch\u7684\u7f29\u5199\uff0c\u5373\u6bcf\u82f1\u5bf8\u50cf\u7d20\u6570\u91cf\u3002\u6a2a\u5411\u548c\u7eb5\u5411\u7684\u8fd9\u4e2a\u503c\u90fd\u662f\u76f8\u540c\u7684\uff0c\u539f\u56e0\u662f\u5927\u90e8\u5206\u624b\u673a\u5c4f\u5e55\u4f7f\u7528\u6b63\u65b9\u5f62\u7684\u50cf\u7d20\u70b9\u3002 \u4e0d\u540c\u7684\u624b\u673a\/\u5e73\u677f\u53ef\u80fd\u5177\u6709\u4e0d\u540c\u7684\u50cf\u7d20\u5bc6\u5ea6\uff0c\u4f8b\u5982\u540c\u4e3a4\u5bf8\u624b\u673a\uff0c\u6709480&#215;320\u5206\u8fa8\u7387\u7684\u4e5f\u6709800&#215;480\u5206\u8fa8\u7387\u7684\uff0c\u524d\u8005\u7684\u50cf\u7d20\u5bc6\u5ea6\u5c31\u6bd4\u8f83\u4f4e\u3002Android\u7cfb\u7edf\u5b9a\u4e49\u4e86\u56db\u79cd\u50cf\u7d20\u5bc6\u5ea6\uff1a\u4f4e\uff08120dpi\uff09\u3001\u4e2d\uff08160dpi\uff09\u3001\u9ad8\uff08240dpi\uff09\u548c\u8d85\u9ad8\uff08320dpi\uff09\uff0c\u5b83\u4eec\u5bf9\u5e94\u7684dp\u5230px\u7684\u7cfb\u6570\u5206\u522b\u4e3a0.75\u30011\u30011.5\u548c2\uff0c\u8fd9\u4e2a\u7cfb\u6570\u4e58\u4ee5dp\u957f\u5ea6\u5c31\u662f\u50cf\u7d20\u6570\u3002\u4f8b\u5982\u754c\u9762\u4e0a\u6709\u4e00\u4e2a\u957f\u5ea6\u4e3a\u201c80dp\u201d\u7684\u56fe\u7247\uff0c\u90a3\u4e48\u5b83\u5728240dpi\u7684\u624b\u673a\u4e0a\u5b9e\u9645\u663e\u793a\u4e3a80&#215;1.5=120px\uff0c\u5728320dpi\u7684\u624b\u673a\u4e0a\u5b9e\u9645\u663e\u793a\u4e3a80&#215;2=160px\u3002\u5982\u679c\u4f60\u62ff\u8fd9\u4e24\u90e8\u624b\u673a\u653e\u5728\u4e00\u8d77\u5bf9\u6bd4\uff0c\u4f1a\u53d1\u73b0\u8fd9\u4e2a\u56fe\u7247\u7684\u7269\u7406\u5c3a\u5bf8\u201c\u5dee\u4e0d\u591a\u201d\uff0c\u8fd9\u5c31\u662f\u4f7f\u7528dp\u4f5c\u4e3a\u5355\u4f4d\u7684\u6548\u679c\uff0c\u89c1\u4e0b\u56fe\u3002 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