{"id":2929,"date":"2025-05-29T18:00:08","date_gmt":"2025-05-29T10:00:08","guid":{"rendered":"https:\/\/www.wunen.com\/index.php\/2025\/05\/29\/%e5%ae%89%e5%8d%93%e5%8a%a8%e7%94%bb%e5%a3%81%e7%ba%b8%e5%ae%9e%e6%88%98%ef%bc%9a%e5%88%b6%e4%bd%9c%e4%b8%80%e4%b8%aa%e6%98%9f%e7%a9%ba%e5%8a%a8%e6%80%81%e5%a3%81%e7%ba%b8%ef%bc%88%e5%b8%a6%e9%9a%8f\/"},"modified":"2025-05-29T18:00:08","modified_gmt":"2025-05-29T10:00:08","slug":"%e5%ae%89%e5%8d%93%e5%8a%a8%e7%94%bb%e5%a3%81%e7%ba%b8%e5%ae%9e%e6%88%98%ef%bc%9a%e5%88%b6%e4%bd%9c%e4%b8%80%e4%b8%aa%e6%98%9f%e7%a9%ba%e5%8a%a8%e6%80%81%e5%a3%81%e7%ba%b8%ef%bc%88%e5%b8%a6%e9%9a%8f","status":"publish","type":"post","link":"http:\/\/www.wunen.com\/index.php\/2025\/05\/29\/%e5%ae%89%e5%8d%93%e5%8a%a8%e7%94%bb%e5%a3%81%e7%ba%b8%e5%ae%9e%e6%88%98%ef%bc%9a%e5%88%b6%e4%bd%9c%e4%b8%80%e4%b8%aa%e6%98%9f%e7%a9%ba%e5%8a%a8%e6%80%81%e5%a3%81%e7%ba%b8%ef%bc%88%e5%b8%a6%e9%9a%8f\/","title":{"rendered":"\u5b89\u5353\u52a8\u753b\u58c1\u7eb8\u5b9e\u6218\uff1a\u5236\u4f5c\u4e00\u4e2a\u661f\u7a7a\u52a8\u6001\u58c1\u7eb8\uff08\u5e26\u968f\u673a\u6d41\u661f\u52a8\u753b\uff09"},"content":{"rendered":"<div class=\"article_content clearfix\" id=\"article_content\">\n <link href=\"https:\/\/csdnimg.cn\/release\/blogv2\/dist\/mdeditor\/css\/editerView\/kdoc_html_views-1a98987dfd.css\" rel=\"stylesheet\"\/>\n <link href=\"https:\/\/csdnimg.cn\/release\/blogv2\/dist\/mdeditor\/css\/editerView\/ck_htmledit_views-704d5b9767.css\" rel=\"stylesheet\"\/>\n<div class=\"markdown_views prism-atom-one-dark\" id=\"content_views\">\n  <svg style=\"display: none;\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n   <path d=\"M5,0 0,2.5 5,5z\" id=\"raphael-marker-block\" stroke-linecap=\"round\" style=\"-webkit-tap-highlight-color: rgba(0, 0, 0, 0);\">\n   <\/path>\n  <\/svg><\/p>\n<h2>\n   <a id=\"_0\"><br \/>\n   <\/a><br \/>\n   \u524d\u8a00<br \/>\n  <\/h2>\n<p>\n   \u5728\u6211\u4e4b\u524d\u7684\u6587\u7ae0<br \/>\n   <a href=\"https:\/\/juejin.cn\/post\/7143505521218158629\" rel=\"nofollow\"><br \/>\n    \u7fa1\u6155\u5927\u52b3\u661f\u7a7a\u9876\uff1f\u4e0d\u5982\u8ddf\u6211\u4e00\u8d77\u4f7f\u7528 Jetpack compose \u7ed8\u5236\u4e00\u4e2a\u661f\u7a7a\u80cc\u666f\uff08\u5e26\u6d41\u661f\u52a8\u753b\uff09<br \/>\n   <\/a><br \/>\n   \u4e2d\uff0c\u6211\u4eec\u4f7f\u7528 Compose \u5b9e\u73b0\u4e86\u661f\u7a7a\u80cc\u666f\u6548\u679c\u3002\n  <\/p>\n<p>\n   \u5e76\u4e14\u8c03\u7528\u975e\u5e38\u65b9\u4fbf\uff0c\u53ea\u9700\u8981\u4e00\u884c\u4ee3\u7801\u5c31\u53ef\u4ee5\u7ed9\u4efb\u610f Compose \u7ec4\u4ef6\u6dfb\u52a0\u4e0a\u8fd9\u4e2a\u661f\u7a7a\u80cc\u666f\u6548\u679c\u3002\n  <\/p>\n<p>\n   \u4f46\u662f\uff0c\u53ea\u662f\u7ed9 Compose \u6dfb\u52a0\u80cc\u666f\u6548\u679c\u603b\u89c9\u5f97\u6709\u70b9&#8221;\u5c0f\u9898\u5927\u4f5c&#8221;\u4e86\uff0c\u8fd9\u4e48\u597d\u770b\u7684\u6548\u679c\uff0c\u4e0d\u7528\u6765\u505a\u58c1\u7eb8\u5b9e\u5728\u662f\u592a\u53ef\u60dc\u4e86\u3002\n  <\/p>\n<p>\n   \u4e8e\u662f\uff0c\u6211\u5c1d\u8bd5\u5c06\u5176\u79fb\u690d\u5230\u52a8\u6001\u58c1\u7eb8\u4e2d\u3002\u4f46\u662f\uff0c\u5c1d\u8bd5\u4e86\u5f88\u4e45\u90fd\u6ca1\u6709\u627e\u5230\u600e\u4e48\u5728\u52a8\u6001\u58c1\u7eb8\u4e2d\u4f7f\u7528 Compose \u3002\n  <\/p>\n<p>\n   \u6700\u7ec8\uff0c\u6211\u8fd8\u662f\u4f7f\u7528\u5b89\u5353\u539f\u751f Canvas \u91cd\u65b0\u7ed8\u5236\u4e86\u4e00\u4e2a\u540c\u6837\u7684\u52a8\u753b\u6548\u679c\u3002\n  <\/p>\n<p>\n   \u5b9e\u73b0\u6548\u679c\u5982\u4e0b\uff1a\n  <\/p>\n<\/p>\n<p>\n   \u597d\u5728 Compose \u7684\u7ed8\u5236\u548c\u5b89\u5353\u7ed8\u5236\u5176\u5b9e\u533a\u522b\u4e5f\u4e0d\u662f\u5f88\u5927\uff0c\u6240\u4ee5\u91cd\u5199\u8d77\u6765\u4e5f\u51e0\u4e4e\u6ca1\u6709\u52a8\u591a\u5c11\u4ee3\u7801\u3002\n  <\/p>\n<p>\n   \u4e0b\u9762\u6211\u4eec\u5c06\u8bb2\u89e3\u5982\u4f55\u5b9e\u73b0\u4e00\u4e2a\u52a8\u6001\u58c1\u7eb8\u3002\n  <\/p>\n<p>\n   \u4ed3\u5e93\u5730\u5740\uff1a<br \/>\n   <a href=\"https:\/\/github.com\/equationl\/starryskywallpaper\"><br \/>\n    starrySkyWallpaper<br \/>\n   <\/a>\n  <\/p>\n<h2>\n   <a id=\"_22\"><br \/>\n   <\/a><br \/>\n   \u52a8\u6001\u58c1\u7eb8\u5b9e\u73b0<br \/>\n  <\/h2>\n<p>\n   \u5176\u5b9e\u5b89\u5353\u5728\u5f88\u65e9\u5f88\u65e9\u7684\u7248\u672c\u5c31\u5df2\u7ecf\u652f\u6301\u4e86\u52a8\u6001\u58c1\u7eb8\uff0c\u53ea\u662f\u4e00\u76f4\u90fd\u6ca1\u591a\u5c11\u4eba\u4f7f\u7528\u7f62\u4e86\u3002\n  <\/p>\n<p>\n   \u4eca\u5929\u6211\u4eec\u5c31\u6765\u770b\u770b\u52a8\u6001\u58c1\u7eb8\u8981\u600e\u4e48\u5b9e\u73b0\u5427\u3002\n  <\/p>\n<h3>\n   <a id=\"WallpaperService_28\"><br \/>\n   <\/a><br \/>\n   WallpaperService<br \/>\n  <\/h3>\n<p>\n   \u5b89\u5353\u4e2d\u7684\u52a8\u6001\u58c1\u7eb8\u4ee5\u670d\u52a1\uff08Server\uff09\u7684\u5f62\u5f0f\u6765\u5b8c\u6210\u8ba1\u7b97\u548c\u7ed8\u5236\uff0c\u5e76\u4e14\u8fd9\u4e2a\u670d\u52a1\u9700\u8981\u7ee7\u627f\u81ea<br \/>\n   <code><br \/>\n    WallpaperService<br \/>\n   <\/code><br \/>\n   \u3002\n  <\/p>\n<p>\n   \u4e00\u4e2a\u7b80\u5355\u7684\u52a8\u6001\u58c1\u7eb8\u6a21\u7248\u4ee3\u7801\u5982\u4e0b\uff1a\n  <\/p>\n<pre><code class=\"prism language-kotlin\"><span class=\"token keyword\">class<\/span> StarrySkyWallpaperServer <span class=\"token operator\">:<\/span> <span class=\"token function\">WallpaperService<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n    <span class=\"token keyword\">override<\/span> <span class=\"token keyword\">fun<\/span> <span class=\"token function\">onCreateEngine<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span> Engine <span class=\"token operator\">=<\/span> <span class=\"token function\">WallpaperEngine<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\n\n    <span class=\"token keyword\">inner<\/span> <span class=\"token keyword\">class<\/span> WallpaperEngine <span class=\"token operator\">:<\/span> WallpaperService<span class=\"token punctuation\">.<\/span><span class=\"token function\">Engine<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n\n        <span class=\"token keyword\">override<\/span> <span class=\"token keyword\">fun<\/span> <span class=\"token function\">onSurfaceCreated<\/span><span class=\"token punctuation\">(<\/span>holder<span class=\"token operator\">:<\/span> SurfaceHolder<span class=\"token operator\">?<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n            <span class=\"token keyword\">super<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">onSurfaceCreated<\/span><span class=\"token punctuation\">(<\/span>holder<span class=\"token punctuation\">)<\/span>\n            <span class=\"token comment\">\/\/ \u53ef\u4ee5\u5728\u8fd9\u91cc\u5199\u7ed8\u5236\u4ee3\u7801<\/span>\n        <span class=\"token punctuation\">}<\/span>\n\n        <span class=\"token keyword\">override<\/span> <span class=\"token keyword\">fun<\/span> <span class=\"token function\">onVisibilityChanged<\/span><span class=\"token punctuation\">(<\/span>visible<span class=\"token operator\">:<\/span> Boolean<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n            <span class=\"token comment\">\/\/ \u5f53\u58c1\u7eb8\u7684\u53ef\u89c1\u884c\u6027\u6539\u53d8\u65f6\u4f1a\u8c03\u7528\u8fd9\u91cc<\/span>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>visible<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n                \n            <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n                \n            <span class=\"token punctuation\">}<\/span>\n        <span class=\"token punctuation\">}<\/span>\n\n        <span class=\"token keyword\">override<\/span> <span class=\"token keyword\">fun<\/span> <span class=\"token function\">onDestroy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n            <span class=\"token keyword\">super<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">onDestroy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\n            \n        <span class=\"token punctuation\">}<\/span>\n    <span class=\"token punctuation\">}<\/span>\n<span class=\"token punctuation\">}<\/span>\n<\/code><\/pre>\n<p>\n   \u53ef\u4ee5\u770b\u5230\uff0c\u5728\u8fd9\u4e2a\u670d\u52a1\u53ef\u4f9b\u6211\u4eec\u6e32\u67d3\u7684\u662f<br \/>\n   <code><br \/>\n    SurfaceHolder<br \/>\n   <\/code><br \/>\n   \u3002\n  <\/p>\n<p>\n   \u800c\u4ece<br \/>\n   <code><br \/>\n    SurfaceHolder<br \/>\n   <\/code><br \/>\n   \u4e2d\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u8fdb\u884c\u6e32\u67d3\uff0c\u5e38\u7528\u7684\u4e09\u79cd\u65b9\u5f0f\u4e3a\uff1a\n  <\/p>\n<ul>\n<li>\n    MediaPlayer\n   <\/li>\n<li>\n    Camera\n   <\/li>\n<li>\n    SurfaceView\n   <\/li>\n<\/ul>\n<p>\n   \u7b2c\u4e00\u4e2a\u5373\u5a92\u4f53\u64ad\u653e\u5668\uff0c\u53ef\u4ee5\u7528\u6765\u64ad\u653e\u89c6\u9891\uff1b\u7b2c\u4e8c\u4e2a\u53ef\u4ee5\u7528\u6765\u5b9e\u65f6\u9884\u89c8\u76f8\u673a\u754c\u9762\uff1b\u7b2c\u4e09\u4e2a\u5c31\u662f\u6211\u4eec\u5e38\u7528\u7684 SurfaceView \uff0c\u53ef\u4ee5\u4ece\u4e2d\u53d6\u51fa Canvas \u6765\u81ea\u5df1\u7ed8\u5236\u5185\u5bb9\u3002\n  <\/p>\n<p>\n   \u56e0\u4e3a\u6211\u4eec\u8fd9\u91cc\u4f7f\u7528\u7684\u662f\u7b2c\u4e09\u79cd\u65b9\u5f0f\uff1a\u81ea\u5b9a\u4e49\u7ed8\u5236\u3002\u6240\u4ee5\u524d\u9762\u4e24\u79cd\u8fd9\u91cc\u5c31\u4e0d\u518d\u8d58\u8ff0\uff0c\u611f\u5174\u8da3\u7684\u53ef\u4ee5\u770b\u770b\u6587\u672b\u53c2\u8003\u94fe\u63a5\u4e2d\u7684\u4ecb\u7ecd\u3002\n  <\/p>\n<p>\n   \u5728\u5f00\u59cb\u7ed8\u5236\u4e4b\u524d\uff0c\u6211\u4eec\u8fd8\u6709\u4e00\u70b9\u51c6\u5907\u5de5\u4f5c\uff0c\u56e0\u4e3a\u8fd9\u662f\u4e00\u4e2a\u670d\u52a1\uff0c\u6240\u4ee5\u81ea\u7136\u662f\u9700\u8981\u5728\u6e05\u5355\u6587\u4ef6(manifest)\u4e2d\u6ce8\u518c\u4e00\u4e0b\u7684\uff1a\n  <\/p>\n<pre><code class=\"prism language-xml\"><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>service<\/span>\n    <span class=\"token attr-name\"><span class=\"token namespace\">android:<\/span>name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>.server.StarrySkyWallpaperServer<span class=\"token punctuation\">\"<\/span><\/span>\n    <span class=\"token attr-name\"><span class=\"token namespace\">android:<\/span>exported<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>true<span class=\"token punctuation\">\"<\/span><\/span>\n    <span class=\"token attr-name\"><span class=\"token namespace\">android:<\/span>label<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>Wallpaper<span class=\"token punctuation\">\"<\/span><\/span>\n    <span class=\"token attr-name\"><span class=\"token namespace\">android:<\/span>permission<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>android.permission.BIND_WALLPAPER<span class=\"token punctuation\">\"<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>intent-filter<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\n        <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>action<\/span> <span class=\"token attr-name\"><span class=\"token namespace\">android:<\/span>name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>android.service.wallpaper.WallpaperService<span class=\"token punctuation\">\"<\/span><\/span> <span class=\"token punctuation\">\/&gt;<\/span><\/span>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>intent-filter<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\n\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>meta-data<\/span>\n        <span class=\"token attr-name\"><span class=\"token namespace\">android:<\/span>name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>android.service.wallpaper<span class=\"token punctuation\">\"<\/span><\/span>\n        <span class=\"token attr-name\"><span class=\"token namespace\">android:<\/span>resource<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>@xml\/wallpaper<span class=\"token punctuation\">\"<\/span><\/span> <span class=\"token punctuation\">\/&gt;<\/span><\/span>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>service<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\n<\/code><\/pre>\n<p>\n   \u5176\u4e2d\u7684<br \/>\n   <code><br \/>\n    android:resource=\"@xml\/wallpaper\"<br \/>\n   <\/code><br \/>\n   wallpaper \u6587\u4ef6\uff0c\u9700\u8981\u6211\u4eec\u81ea\u5df1\u5728 xml \u6587\u4ef6\u5939\u65b0\u5efa\u4e00\u4e2a\uff1a\n  <\/p>\n<pre><code class=\"prism language-xml\"><span class=\"token prolog\">&lt;?xml version=\"1.0\" encoding=\"utf-8\"?&gt;<\/span>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>wallpaper<\/span> <span class=\"token attr-name\"><span class=\"token namespace\">xmlns:<\/span>android<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>http:\/\/schemas.android.com\/apk\/res\/android<span class=\"token punctuation\">\"<\/span><\/span>\n    <span class=\"token attr-name\"><span class=\"token namespace\">android:<\/span>description<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>@string\/app_name<span class=\"token punctuation\">\"<\/span><\/span>\n    <span class=\"token attr-name\"><span class=\"token namespace\">android:<\/span>thumbnail<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">=<\/span><span class=\"token punctuation\">\"<\/span>@mipmap\/ic_launcher<span class=\"token punctuation\">\"<\/span><\/span> <span class=\"token punctuation\">\/&gt;<\/span><\/span>\n<\/code><\/pre>\n<p>\n   \u4ece\u5b57\u6bb5\u540d\u4e5f\u5f88\u5bb9\u6613\u770b\u51fa\uff0c\u8fd9\u662f\u6211\u4eec\u52a8\u6001\u58c1\u7eb8\u7684\u4e00\u4e9b\u914d\u7f6e\u4fe1\u606f\uff0c\u6bd4\u5982\u4e0a\u9762\u5c31\u5199\u4e86\u63cf\u8ff0\u4fe1\u606f\u548c\u7f29\u7565\u56fe\u3002\n  <\/p>\n<h3>\n   <a id=\"_102\"><br \/>\n   <\/a><br \/>\n   \u8bbe\u7f6e\u58c1\u7eb8<br \/>\n  <\/h3>\n<p>\n   \u7ecf\u8fc7\u4e0a\u9762\u7684\u6b65\u9aa4\uff0c\u6211\u4eec\u7684\u52a8\u6001\u58c1\u7eb8\u670d\u52a1\u5c31\u6ce8\u518c\u5b8c\u6210\u4e86\uff0c\u6211\u4eec\u5728\u624b\u673a\u4e0a\u7684\u58c1\u7eb8\u7f16\u8f91\u754c\u9762\u4e2d\u9009\u62e9\u52a8\u6001\u58c1\u7eb8\u5c31\u80fd\u770b\u5230\u6211\u4eec\u521b\u5efa\u7684\u8fd9\u4e2a\u52a8\u6001\u58c1\u7eb8\u4e86\u3002\n  <\/p>\n<p>\n   \u7136\u800c\uff0c\u4e8b\u5b9e\u4e0a\uff0c\u6b63\u56e0\u4e3a\u6211\u4eec\u4e0a\u9762\u8bf4\u7684\uff0c\u867d\u7136\u5b89\u5353\u4f60\u7684\u52a8\u6001\u58c1\u7eb8\u5f88\u4e45\u4ee5\u524d\u5c31\u6709\u4e86\uff0c\u4f46\u662f\u7528\u7684\u4eba\u4e00\u76f4\u4e0d\u591a\u3002\n  <\/p>\n<p>\n   \u6240\u4ee5\u56fd\u5185\u7684\u5b9a\u5236\u7cfb\u7edf\u57fa\u672c\u4e0a\u90fd\u628a\u8fd9\u4e2a\u529f\u80fd\u9609\u5272\u6216\u9b54\u6539\u4e86\u3002\u6bd4\u5982\u6211\u73b0\u5728\u7528\u7684 MIUI \uff0c\u867d\u7136\u8bbe\u7f6e\u58c1\u7eb8\u65f6\u8fd8\u80fd\u9009\u52a8\u6001\u58c1\u7eb8\uff0c\u4f46\u662f\u5374\u53ea\u4f1a\u663e\u793a\u5b98\u65b9\u7684\u52a8\u6001\u58c1\u7eb8\uff0c\u7b2c\u4e09\u65b9\u7684\u90fd\u88ab\u9690\u85cf\u4e86\u3002\n  <\/p>\n<p>\n   \u4e0d\u8fc7\u4e0d\u7528\u62c5\u5fc3\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u6211\u4eec\u81ea\u5df1\u7684APP\u4e2d&#8221;\u624b\u52a8&#8221;\u8c03\u7528\u5e76\u8bbe\u7f6e\u6211\u4eec\u81ea\u5df1\u7684\u58c1\u7eb8\uff1a\n  <\/p>\n<pre><code class=\"prism language-kotlin\"><span class=\"token keyword\">val<\/span> intent <span class=\"token operator\">=<\/span> <span class=\"token function\">Intent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\nintent<span class=\"token punctuation\">.<\/span>action <span class=\"token operator\">=<\/span> WallpaperManager<span class=\"token punctuation\">.<\/span>ACTION_CHANGE_LIVE_WALLPAPER\nintent<span class=\"token punctuation\">.<\/span><span class=\"token function\">putExtra<\/span><span class=\"token punctuation\">(<\/span>\n    WallpaperManager<span class=\"token punctuation\">.<\/span>EXTRA_LIVE_WALLPAPER_COMPONENT<span class=\"token punctuation\">,<\/span>\n    <span class=\"token function\">ComponentName<\/span><span class=\"token punctuation\">(<\/span>context<span class=\"token punctuation\">.<\/span>packageName<span class=\"token punctuation\">,<\/span> StarrySkyWallpaperServer<span class=\"token operator\">::<\/span><span class=\"token keyword\">class<\/span><span class=\"token punctuation\">.<\/span>java<span class=\"token punctuation\">.<\/span>name<span class=\"token punctuation\">)<\/span>\n<span class=\"token punctuation\">)<\/span>\ncontext<span class=\"token punctuation\">.<\/span><span class=\"token function\">startActivity<\/span><span class=\"token punctuation\">(<\/span>intent<span class=\"token punctuation\">)<\/span>\n<\/code><\/pre>\n<p>\n   \u4f8b\u5982\uff0c\u8fd9\u91cc\u6211\u4eec\u7684APP\u542f\u52a8\u754c\u9762\u4ee3\u7801\u5982\u4e0b\uff1a\n  <\/p>\n<pre><code class=\"prism language-kotlin\"><span class=\"token annotation builtin\">@Composable<\/span>\n<span class=\"token keyword\">fun<\/span> <span class=\"token function\">MainScreen<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n    <span class=\"token keyword\">val<\/span> context <span class=\"token operator\">=<\/span> LocalContext<span class=\"token punctuation\">.<\/span>current\n\n    <span class=\"token function\">Column<\/span><span class=\"token punctuation\">(<\/span>\n        Modifier<span class=\"token punctuation\">.<\/span><span class=\"token function\">fillMaxSize<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>\n        verticalArrangement <span class=\"token operator\">=<\/span> Arrangement<span class=\"token punctuation\">.<\/span>Center<span class=\"token punctuation\">,<\/span>\n        horizontalAlignment <span class=\"token operator\">=<\/span> Alignment<span class=\"token punctuation\">.<\/span>CenterHorizontally\n    <span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n        <span class=\"token function\">Button<\/span><span class=\"token punctuation\">(<\/span>onClick <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n            <span class=\"token function\">onClickSetWallPaper<\/span><span class=\"token punctuation\">(<\/span>context<span class=\"token punctuation\">)<\/span>\n        <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n            <span class=\"token function\">Text<\/span><span class=\"token punctuation\">(<\/span>text <span class=\"token operator\">=<\/span> <span class=\"token string\">\"\u8bbe\u7f6e\"<\/span><span class=\"token punctuation\">)<\/span>\n        <span class=\"token punctuation\">}<\/span>\n    <span class=\"token punctuation\">}<\/span>\n<span class=\"token punctuation\">}<\/span>\n\n<span class=\"token keyword\">private<\/span> <span class=\"token keyword\">fun<\/span> <span class=\"token function\">onClickSetWallPaper<\/span><span class=\"token punctuation\">(<\/span>context<span class=\"token operator\">:<\/span> Context<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n    <span class=\"token keyword\">val<\/span> intent <span class=\"token operator\">=<\/span> <span class=\"token function\">Intent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\n    intent<span class=\"token punctuation\">.<\/span>action <span class=\"token operator\">=<\/span> WallpaperManager<span class=\"token punctuation\">.<\/span>ACTION_CHANGE_LIVE_WALLPAPER\n    intent<span class=\"token punctuation\">.<\/span><span class=\"token function\">putExtra<\/span><span class=\"token punctuation\">(<\/span>\n        WallpaperManager<span class=\"token punctuation\">.<\/span>EXTRA_LIVE_WALLPAPER_COMPONENT<span class=\"token punctuation\">,<\/span>\n        <span class=\"token function\">ComponentName<\/span><span class=\"token punctuation\">(<\/span>context<span class=\"token punctuation\">.<\/span>packageName<span class=\"token punctuation\">,<\/span> StarrySkyWallpaperServer<span class=\"token operator\">::<\/span><span class=\"token keyword\">class<\/span><span class=\"token punctuation\">.<\/span>java<span class=\"token punctuation\">.<\/span>name<span class=\"token punctuation\">)<\/span>\n    <span class=\"token punctuation\">)<\/span>\n    context<span class=\"token punctuation\">.<\/span><span class=\"token function\">startActivity<\/span><span class=\"token punctuation\">(<\/span>intent<span class=\"token punctuation\">)<\/span>\n<span class=\"token punctuation\">}<\/span>\n<\/code><\/pre>\n<p>\n   \u4ee3\u7801\u5f88\u7b80\u5355\uff0c\u5c31\u4e00\u4e2a\u5c45\u4e2d\u7684\u8bbe\u7f6e\u6309\u94ae\uff0c\u70b9\u51fb\u540e\u5c31\u4f1a\u8df3\u8f6c\u5230\u7cfb\u7edf\u7684\u58c1\u7eb8\u8bbe\u7f6e\u754c\u9762\uff0c\u5e76\u4f1a\u663e\u793a\u6211\u4eec\u81ea\u5b9a\u4e49\u58c1\u7eb8\u7684\u52a8\u6001\u9884\u89c8\uff1a\n  <\/p>\n<\/p>\n<h3>\n   <a id=\"_156\"><br \/>\n   <\/a><br \/>\n   \u7ed8\u5236\u56fe\u6848\u65f6\u673a<br \/>\n  <\/h3>\n<p>\n   \u5728\u4e0a\u9762\u7684<br \/>\n   <code><br \/>\n    WallpaperService<br \/>\n   <\/code><br \/>\n   \u670d\u52a1\u6a21\u7248\u4e2d\uff0c\u6211\u4eec\u5728\u6ce8\u91ca\u4e2d\u5199\u4e86\u53ef\u4ee5\u5728<br \/>\n   <code><br \/>\n    onSurfaceCreated<br \/>\n   <\/code><br \/>\n   \u56de\u8c03\u4e2d\u5199\u6211\u4eec\u7684\u7ed8\u5236\u4ee3\u7801\u3002\n  <\/p>\n<p>\n   \u4f46\u662f\u8fd9\u91cc\u6211\u4eec\u4e3a\u4e86\u66f4\u597d\u7684\u63a7\u5236\u7ed8\u5236\u8fc7\u7a0b\uff0c\u5c31\u4e0d\u5728<br \/>\n   <code><br \/>\n    onSurfaceCreated<br \/>\n   <\/code><br \/>\n   \u5199\u6211\u4eec\u7684\u7ed8\u5236\u4ee3\u7801\u4e86\uff0c\u800c\u662f\u5728<br \/>\n   <code><br \/>\n    onVisibilityChanged<br \/>\n   <\/code><br \/>\n   \u56de\u8c03\u4e2d\u5199\uff1a\n  <\/p>\n<pre><code class=\"prism language-kotlin\"><span class=\"token keyword\">override<\/span> <span class=\"token keyword\">fun<\/span> <span class=\"token function\">onVisibilityChanged<\/span><span class=\"token punctuation\">(<\/span>visible<span class=\"token operator\">:<\/span> Boolean<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>visible<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n        <span class=\"token comment\">\/\/ \u542f\u52a8\u7ed8\u5236<\/span>\n        <span class=\"token function\">continueDraw<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\n    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n        <span class=\"token comment\">\/\/ \u505c\u6b62\u7ed8\u5236<\/span>\n        <span class=\"token function\">stopDraw<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\n    <span class=\"token punctuation\">}<\/span>\n<span class=\"token punctuation\">}<\/span>\n<\/code><\/pre>\n<p>\n   \u5f53\u58c1\u7eb8\u53ef\u89c1\u65f6\u8c03\u7528<br \/>\n   <code><br \/>\n    continueDraw<br \/>\n   <\/code><br \/>\n   \u5f00\u59cb\u7ed8\u5236\uff1b\u5f53\u58c1\u7eb8\u4e0d\u53ef\u89c1\u65f6\u8c03\u7528<br \/>\n   <code><br \/>\n    stopDraw<br \/>\n   <\/code><br \/>\n   \u505c\u6b62\u7ed8\u5236\u3002\n  <\/p>\n<p>\n   \u540c\u65f6\u4e3a\u4e86\u80fd\u591f\u66f4\u597d\u7684\u505c\u6b62\u7ed8\u5236\u4ee3\u7801\uff0c\u6211\u4eec\u8fd9\u91cc\u7528\u4e86\u534f\u7a0b\uff0c\u5176\u5b9e\u8fd9\u91cc\u6709\u70b9\u591a\u4f59\uff0c\u56e0\u4e3a\u6211\u4eec\u7684\u7ed8\u5236\u5185\u5bb9\u90fd\u662f\u5728\u670d\u52a1\u4e2d\uff0c\u4e0d\u4f1a\u5b58\u5728\u963b\u585e\u7684\u60c5\u51b5\u3002\n  <\/p>\n<p>\n   <code><br \/>\n    continueDraw<br \/>\n   <\/code><br \/>\n   \u548c<br \/>\n   <code><br \/>\n    stopDraw<br \/>\n   <\/code><br \/>\n   \u5b9a\u4e49\u5982\u4e0b\uff1a\n  <\/p>\n<pre><code class=\"prism language-kotlin\"><span class=\"token keyword\">private<\/span> <span class=\"token keyword\">var<\/span> coroutineScope <span class=\"token operator\">=<\/span> <span class=\"token function\">CoroutineScope<\/span><span class=\"token punctuation\">(<\/span>Dispatchers<span class=\"token punctuation\">.<\/span>IO<span class=\"token punctuation\">)<\/span>\n\n<span class=\"token keyword\">private<\/span> <span class=\"token keyword\">var<\/span> drawStarrySky <span class=\"token operator\">=<\/span> <span class=\"token function\">DrawStarrySky<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\n\n<span class=\"token keyword\">private<\/span> <span class=\"token keyword\">fun<\/span> <span class=\"token function\">continueDraw<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n    coroutineScope<span class=\"token punctuation\">.<\/span><span class=\"token function\">launch<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n        drawStarrySky<span class=\"token punctuation\">.<\/span><span class=\"token function\">startDraw<\/span><span class=\"token punctuation\">(<\/span>surfaceHolder<span class=\"token punctuation\">)<\/span>\n    <span class=\"token punctuation\">}<\/span>\n<span class=\"token punctuation\">}<\/span>\n\n<span class=\"token keyword\">private<\/span> <span class=\"token keyword\">fun<\/span> <span class=\"token function\">stopDraw<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n    drawStarrySky<span class=\"token punctuation\">.<\/span><span class=\"token function\">stopDraw<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\n    coroutineScope<span class=\"token punctuation\">.<\/span>coroutineContext<span class=\"token punctuation\">.<\/span><span class=\"token function\">cancelChildren<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\n<span class=\"token punctuation\">}<\/span>\n<\/code><\/pre>\n<p>\n   \u4e0a\u9762\u7684<br \/>\n   <code><br \/>\n    DrawStarrySky<br \/>\n   <\/code><br \/>\n   \u7c7b\u5373\u6211\u4eec\u7684\u7ed8\u5236\u4ee3\u7801\uff0c\u8fd9\u91cc\u5b83\u53ea\u516c\u5f00\u4e86\u4e24\u4e2a\u65b9\u6cd5\uff1a<br \/>\n   <code><br \/>\n    startDraw<br \/>\n   <\/code><br \/>\n   \u548c<br \/>\n   <code><br \/>\n    stopDraw<br \/>\n   <\/code><br \/>\n   \u3002\n  <\/p>\n<p>\n   \u5176\u5b9e\u4e00\u5f00\u59cb\u6211\u53ea\u5bf9\u5916\u66b4\u9732\u4e86<br \/>\n   <code><br \/>\n    startDraw<br \/>\n   <\/code><br \/>\n   \u65b9\u6cd5\uff0c\u6ca1\u6709\u66b4\u9732\u505c\u6b62\u65b9\u6cd5\uff0c\u4f46\u662f\u6211\u5728\u6d4b\u8bd5\u65f6\u53d1\u73b0\uff0c\u4ec5\u9760<br \/>\n   <code><br \/>\n    coroutineScope.coroutineContext.cancelChildren()<br \/>\n   <\/code><br \/>\n   \u5e76\u4e0d\u80fd\u53ca\u65f6\u7684\u53d6\u6d88\u6389\u534f\u7a0b\u3002\n  <\/p>\n<p>\n   \u8fd9\u4f1a\u5bfc\u81f4\u53ef\u80fd\u7ed8\u5236\u5bf9\u8c61\u5df2\u7ecf\u88ab\u9500\u6bc1\u4e86\uff0c\u4f46\u662f\u7531\u4e8e\u6211\u7684\u534f\u7a0b\u4e0d\u662f\u7acb\u5373\u88ab\u53d6\u6d88\u7684\uff0c\u4f9d\u65e7\u4f1a\u8c03\u7528\u5df2\u88ab\u9500\u6bc1\u7684\u7ed8\u5236\u5bf9\u8c61\uff0c\u8fd9\u5c31\u4f1a\u5bfc\u81f4\u95ea\u9000\u3002\n  <\/p>\n<p>\n   \u6240\u4ee5\u6211\u989d\u5916\u52a0\u4e86\u4e00\u4e2a\u505c\u6b62\u65b9\u6cd5\uff0c\u5e76\u4e14\u5728\u5185\u90e8\u81ea\u5df1\u7ef4\u62a4\u4e00\u4e2a\u505c\u6b62\u6807\u5fd7<br \/>\n   <code><br \/>\n    isRunning<br \/>\n   <\/code><br \/>\n   \u907f\u514d\u4e0a\u8ff0\u60c5\u51b5\u7684\u51fa\u73b0\u3002\n  <\/p>\n<h3>\n   <a id=\"_DrawStarrySky_205\"><br \/>\n   <\/a><br \/>\n   \u7ed8\u5236\u5b9e\u73b0\u7c7b DrawStarrySky<br \/>\n  <\/h3>\n<p>\n   \u5728\u5f00\u59cb\u4e4b\u524d\uff0c\u5148\u4ecb\u7ecd\u4e00\u4e0b\u5982\u4f55\u4ece SurfaceHolder \u4e2d\u62ff\u5230 Canvas \u7528\u4e8e\u7ed8\u5236\u3002\n  <\/p>\n<p>\n   \u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0c\u6211\u4eec\u7684\u5f00\u59cb\u7ed8\u5236\u65b9\u6cd5<br \/>\n   <code><br \/>\n    drawStarrySky.startDraw(surfaceHolder)<br \/>\n   <\/code><br \/>\n   \u63a5\u6536\u4e86\u4e00\u4e2a\u53c2\u6570\uff0c\u5c31\u662f SurfaceHolder\u3002\n  <\/p>\n<p>\n   \u90a3\u4e48\u5982\u4f55\u4ece SurfaceHolder \u4e2d\u62ff\u5230 Canvas \uff0c\u5e76\u4e14\u5f53\u6211\u4eec\u7ed8\u5236\u5b8c\u6210\u540e\u5982\u4f55\u5c06\u8fd9\u4e2a Canvas \u5199\u56de\u5462\uff1f\n  <\/p>\n<p>\n   \u5176\u5b9e\u5f88\u7b80\u5355\uff0c\u4f9d\u65e7\u662f\u4e00\u4e2a\u6a21\u7248\u4ee3\u7801\uff1a\n  <\/p>\n<pre><code class=\"prism language-kotlin\"><span class=\"token keyword\">var<\/span> canvas<span class=\"token operator\">:<\/span> Canvas<span class=\"token operator\">?<\/span> <span class=\"token operator\">=<\/span> <span class=\"token keyword\">null<\/span>\n\n<span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n    <span class=\"token comment\">\/\/ \u9501\u5b9a\u5e76\u8fd4\u56de\u5f53\u524d Surface \u4e2d\u7684 Canvas<\/span>\n    canvas <span class=\"token operator\">=<\/span> surfaceHolder<span class=\"token punctuation\">.<\/span><span class=\"token function\">lockCanvas<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>canvas <span class=\"token operator\">!=<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n        <span class=\"token comment\">\/\/ \u5728\u8fd9\u91cc\u5bf9 Canvas \u8fdb\u884c\u7ed8\u5236<\/span>\n    <span class=\"token punctuation\">}<\/span>\n<span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">finally<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>canvas <span class=\"token operator\">!=<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n        <span class=\"token comment\">\/\/ \u89e3\u9501 Canvas \u5e76\u5199\u56de\u5230 Surface \u4e2d<\/span>\n        holder<span class=\"token punctuation\">.<\/span><span class=\"token function\">unlockCanvasAndPost<\/span><span class=\"token punctuation\">(<\/span>canvas<span class=\"token punctuation\">)<\/span>\n    <span class=\"token punctuation\">}<\/span>\n<span class=\"token punctuation\">}<\/span>\n<\/code><\/pre>\n<p>\n   \u5f53\u7136\uff0c\u6211\u4eec\u7684\u7ed8\u5236\u4ee3\u7801\u6709\u5f88\u591a\uff0c\u603b\u4e0d\u80fd\u6bcf\u6b21\u90fd\u5199\u8fd9\u4e00\u5927\u5806\u6a21\u7248\u4ee3\u7801\u5427\uff1f\n  <\/p>\n<p>\n   \u6240\u4ee5\uff0c\u6211\u4eec\u5199\u4e86\u4e00\u4e2a\u51fd\u6570<br \/>\n   <code><br \/>\n    getCanvas<br \/>\n   <\/code><br \/>\n   :\n  <\/p>\n<pre><code class=\"prism language-kotlin\"><span class=\"token keyword\">private<\/span> <span class=\"token keyword\">fun<\/span> <span class=\"token function\">getCanvas<\/span><span class=\"token punctuation\">(<\/span>\n    holder<span class=\"token operator\">:<\/span> SurfaceHolder<span class=\"token punctuation\">,<\/span>\n    drawContent<span class=\"token operator\">:<\/span> <span class=\"token punctuation\">(<\/span>canvas<span class=\"token operator\">:<\/span> Canvas<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">-&gt;<\/span> Unit\n<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n    <span class=\"token keyword\">var<\/span> canvas<span class=\"token operator\">:<\/span> Canvas<span class=\"token operator\">?<\/span> <span class=\"token operator\">=<\/span> <span class=\"token keyword\">null<\/span>\n\n    <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n        canvas <span class=\"token operator\">=<\/span> holder<span class=\"token punctuation\">.<\/span><span class=\"token function\">lockCanvas<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>canvas <span class=\"token operator\">!=<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n            <span class=\"token function\">drawContent<\/span><span class=\"token punctuation\">(<\/span>canvas<span class=\"token punctuation\">)<\/span>\n        <span class=\"token punctuation\">}<\/span>\n    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">finally<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>canvas <span class=\"token operator\">!=<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n            <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n                holder<span class=\"token punctuation\">.<\/span><span class=\"token function\">unlockCanvasAndPost<\/span><span class=\"token punctuation\">(<\/span>canvas<span class=\"token punctuation\">)<\/span>\n            <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">catch<\/span> <span class=\"token punctuation\">(<\/span>tr<span class=\"token operator\">:<\/span> Throwable<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n                tr<span class=\"token punctuation\">.<\/span><span class=\"token function\">printStackTrace<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\n            <span class=\"token punctuation\">}<\/span>\n        <span class=\"token punctuation\">}<\/span>\n    <span class=\"token punctuation\">}<\/span>\n<span class=\"token punctuation\">}<\/span>\n<\/code><\/pre>\n<p>\n   \u4e86\u89e3\u4e86\u600e\u4e48\u62ff\u5230 Canvas \u4ee5\u53ca\u600e\u4e48\u5199\u56de Canvas \uff0c\u4e0b\u4e00\u6b65\u5c31\u662f\u6b63\u5f0f\u5f00\u59cb\u7ed8\u5236\uff1a\n  <\/p>\n<pre><code class=\"prism language-kotlin\"><span class=\"token keyword\">suspend<\/span> <span class=\"token keyword\">fun<\/span> <span class=\"token function\">startDraw<\/span><span class=\"token punctuation\">(<\/span>\n    holder<span class=\"token operator\">:<\/span> SurfaceHolder<span class=\"token punctuation\">,<\/span>\n    randomSeed<span class=\"token operator\">:<\/span> Long <span class=\"token operator\">=<\/span> <span class=\"token number\">1L<\/span>\n<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n\n    isRunning <span class=\"token operator\">=<\/span> <span class=\"token boolean\">true<\/span>\n\n    <span class=\"token comment\">\/\/ \u521d\u59cb\u5316\u53c2\u6570<\/span>\n    <span class=\"token keyword\">val<\/span> random <span class=\"token operator\">=<\/span> <span class=\"token function\">Random<\/span><span class=\"token punctuation\">(<\/span>randomSeed<span class=\"token punctuation\">)<\/span>\n    <span class=\"token keyword\">val<\/span> paint <span class=\"token operator\">=<\/span> <span class=\"token function\">Paint<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\n    <span class=\"token keyword\">var<\/span> canvasWidth <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span>\n    <span class=\"token keyword\">var<\/span> canvasHeight <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span>\n\n    <span class=\"token comment\">\/\/ \u8fd9\u91cc\u4ec5\u4ec5\u662f\u4e3a\u4e86\u62ff\u5230\u753b\u5e03\u5927\u5c0f\uff0c\u5176\u5b9e\u6709\u70b9\u591a\u4f59\u4e86\uff0c\u62ff\u753b\u5e03\u5927\u5c0f\u7684\u65b9\u6cd5\u5f88\u591a\uff0c\u6ca1\u5fc5\u8981\u8fd9\u6837\u62ff\u3002\u4e0d\u8fc7\u8fd9\u91cc\u5077\u4e86\u4e2a\u61d2<\/span>\n    <span class=\"token function\">getCanvas<\/span><span class=\"token punctuation\">(<\/span>holder<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span> canvas <span class=\"token operator\">-&gt;<\/span>\n        canvasWidth <span class=\"token operator\">=<\/span> canvas<span class=\"token punctuation\">.<\/span>width\n        canvasHeight <span class=\"token operator\">=<\/span> canvas<span class=\"token punctuation\">.<\/span>height\n    <span class=\"token punctuation\">}<\/span>\n\n    <span class=\"token comment\">\/\/ \u80cc\u666f\u7f13\u5b58<\/span>\n    <span class=\"token keyword\">val<\/span> bitmap <span class=\"token operator\">=<\/span> Bitmap<span class=\"token punctuation\">.<\/span><span class=\"token function\">createBitmap<\/span><span class=\"token punctuation\">(<\/span>canvasWidth<span class=\"token punctuation\">,<\/span> canvasHeight<span class=\"token punctuation\">,<\/span> Bitmap<span class=\"token punctuation\">.<\/span>Config<span class=\"token punctuation\">.<\/span>ARGB_8888<span class=\"token punctuation\">)<\/span>\n    <span class=\"token comment\">\/\/ \u7ed8\u5236\u9759\u6001\u80cc\u666f<\/span>\n    <span class=\"token function\">drawFixedContent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">Canvas<\/span><span class=\"token punctuation\">(<\/span>bitmap<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> random<span class=\"token punctuation\">)<\/span>\n\n    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>isRunning<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n\n        <span class=\"token comment\">\/\/ \u7ed8\u5236\u52a8\u6001\u6d41\u661f<\/span>\n        <span class=\"token keyword\">val<\/span> safeDistanceStandard <span class=\"token operator\">=<\/span> canvasWidth <span class=\"token operator\">\/<\/span> <span class=\"token number\">10<\/span>\n        <span class=\"token keyword\">val<\/span> safeDistanceVertical <span class=\"token operator\">=<\/span> canvasHeight <span class=\"token operator\">\/<\/span> <span class=\"token number\">10<\/span>\n        <span class=\"token keyword\">val<\/span> startX <span class=\"token operator\">=<\/span> random<span class=\"token punctuation\">.<\/span><span class=\"token function\">nextInt<\/span><span class=\"token punctuation\">(<\/span>safeDistanceStandard<span class=\"token punctuation\">,<\/span> canvasWidth <span class=\"token operator\">-<\/span> safeDistanceStandard<span class=\"token punctuation\">)<\/span>\n        <span class=\"token keyword\">val<\/span> startY <span class=\"token operator\">=<\/span> random<span class=\"token punctuation\">.<\/span><span class=\"token function\">nextInt<\/span><span class=\"token punctuation\">(<\/span>safeDistanceVertical<span class=\"token punctuation\">,<\/span> canvasHeight <span class=\"token operator\">-<\/span> safeDistanceVertical<span class=\"token punctuation\">)<\/span>\n\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>time <span class=\"token keyword\">in<\/span> <span class=\"token number\">0<\/span><span class=\"token operator\">..<\/span>meteorTime<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>isRunning<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">break<\/span>\n\n            <span class=\"token function\">getCanvas<\/span><span class=\"token punctuation\">(<\/span>holder<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<!-- --><\/span> canvas <span class=\"token operator\">-&gt;<\/span>\n                <span class=\"token comment\">\/\/ \u6e05\u9664\u753b\u5e03<\/span>\n                canvas<span class=\"token punctuation\">.<\/span><span class=\"token function\">drawColor<\/span><span class=\"token punctuation\">(<\/span>Color<span class=\"token punctuation\">.<\/span>TRANSPARENT<span class=\"token punctuation\">,<\/span> PorterDuff<span class=\"token punctuation\">.<\/span>Mode<span class=\"token punctuation\">.<\/span>CLEAR<span class=\"token punctuation\">)<\/span>\n\n                <span class=\"token comment\">\/\/ \u7ed8\u5236\u80cc\u666f<\/span>\n                paint<span class=\"token punctuation\">.<\/span><span class=\"token function\">reset<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\n                canvas<span class=\"token punctuation\">.<\/span><span class=\"token function\">drawBitmap<\/span><span class=\"token punctuation\">(<\/span>bitmap<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0f<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0f<\/span><span class=\"token punctuation\">,<\/span> paint<span class=\"token punctuation\">)<\/span>\n\n                <span class=\"token comment\">\/\/ \u7ed8\u5236\u6d41\u661f<\/span>\n                <span class=\"token function\">drawMeteor<\/span><span class=\"token punctuation\">(<\/span>\n                    canvas<span class=\"token punctuation\">,<\/span>\n                    time<span class=\"token punctuation\">.<\/span><span class=\"token function\">toFloat<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>\n                    startX<span class=\"token punctuation\">,<\/span>\n                    startY<span class=\"token punctuation\">,<\/span>\n                    paint\n                <span class=\"token punctuation\">)<\/span>\n            <span class=\"token punctuation\">}<\/span>\n            \n            <span class=\"token function\">delay<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span>\n        <span class=\"token punctuation\">}<\/span>\n\n        <span class=\"token function\">delay<\/span><span class=\"token punctuation\">(<\/span>meteorScaleTime<span class=\"token punctuation\">)<\/span>\n    <span class=\"token punctuation\">}<\/span>\n<span class=\"token punctuation\">}<\/span>\n<\/code><\/pre>\n<p>\n   \u4ece\u4e0a\u9762\u7684\u7ed8\u5236\u4ee3\u7801\u53ef\u4ee5\u770b\u5230\uff0c\u6211\u4eec\u5148\u8c03\u7528<br \/>\n   <code><br \/>\n    drawFixedContent<br \/>\n   <\/code><br \/>\n   \u65b9\u6cd5\u7ed8\u5236\u4e86\u9759\u6001\u80cc\u666f\uff0c\u8fd9\u91cc\u7684\u5177\u4f53\u7ed8\u5236\u4ee3\u7801\u5c31\u4e0d\u8d34\u4e86\uff0c\u56e0\u4e3a\u548c\u4e0a\u6b21\u6211\u4eec\u7528 Compose \u5b9e\u73b0\u7684\u51e0\u4e4e\u6ca1\u6709\u533a\u522b\uff0c\u6709\u9700\u8981\u7684\u53ef\u4ee5\u770b\u6211\u7684\u4e0a\u7bc7\u6587\u7ae0\u6216\u8005\u76f4\u63a5\u770b\u9879\u76ee\u6e90\u7801\u4e86\u89e3\u3002\n  <\/p>\n<p>\n   \u6211\u4eec\u53ea\u9700\u8981\u77e5\u9053\u8fd9\u4e2a\u65b9\u6cd5\u6700\u7ec8\u7ed8\u5236\u7684\u662f\u9ed1\u8272\u80cc\u666f\u548c\u5176\u4e2d\u56fa\u5b9a\u4e0d\u53d8\u7684\u661f\u661f\u5373\u53ef\u3002\n  <\/p>\n<p>\n   \u4f46\u662f\uff0c\u4e0d\u77e5\u9053\u4f60\u4eec\u6709\u6ca1\u6709\u6ce8\u610f\u5230\uff0c\u8fd9\u91cc\u6211\u5e76\u4e0d\u662f\u76f4\u63a5\u628a\u5185\u5bb9\u7ed8\u5236\u5230\u4ece Surface \u4e2d\u62ff\u5230\u7684 Canvas \u4e2d\uff0c\u800c\u662f\u7ed8\u5236\u5230\u4e86\u4e00\u4e2a Bitmap \u4e2d\u3002\n  <\/p>\n<p>\n   \u8fd9\u662f\u56e0\u4e3a\u6211\u4eec\u4ece Surface \u4e2d\u62ff\u5230\u7684 Canvas \u5e76\u4e0d\u662f\u7a7a\u767d\u7684 Canvas \u800c\u662f\u5f53\u524d Surface \u663e\u793a\u5185\u5bb9\u7684 Canvas\u3002\n  <\/p>\n<p>\n   \u6362\u53e5\u8bdd\u8bf4\uff0c\u6211\u4eec\u6bcf\u6b21\u62ff\u5230\u7684 Canvas \u90fd\u662f\u4e4b\u524d\u6240\u6709\u7ed8\u5236\u53e0\u52a0\u8d77\u6765\u7684 Canvas\u3002\n  <\/p>\n<p>\n   \u4e3a\u4e86\u5b9e\u73b0\u52a8\u753b\u6548\u679c\uff0c\u6211\u4eec\u4f1a\u5728\u6bcf\u6b21\u7ed8\u5236\u4e4b\u524d\u4f7f\u7528<br \/>\n   <code><br \/>\n    canvas.drawColor(Color.TRANSPARENT, PorterDuff.Mode.CLEAR)<br \/>\n   <\/code><br \/>\n   \u5c06\u5f53\u524d\u753b\u5e03 \u201c\u6e05\u7a7a\u201d\u3002\n  <\/p>\n<p>\n   \u800c\u6211\u4eec\u8fd9\u91cc\u7ed8\u5236\u7684\u660e\u660e\u662f\u56fa\u5b9a\u4e0d\u53d8\u7684\u80cc\u666f\uff0c\u5374\u5728\u6bcf\u6b21\u88ab\u6e05\u7a7a\u540e\u90fd\u91cd\u65b0\u8ba1\u7b97\u5e76\u7ed8\u5236\u3002\n  <\/p>\n<p>\n   \u8fd9\u663e\u7136\u4e0d\u5408\u7406\uff0c\u6211\u4eec\u9700\u8981\u5faa\u73af\u7ed8\u5236\u7684\u660e\u660e\u53ea\u6709\u6d41\u661f\u76f8\u5173\u5185\u5bb9\u5c31\u53ef\u4ee5\u4e86\u3002\n  <\/p>\n<p>\n   \u6240\u4ee5\uff0c\u8fd9\u91cc\u6211\u4eec\u5728\u5faa\u73af\u4e4b\u5916\u5c06\u80cc\u666f\u8ba1\u7b97\u5e76\u7ed8\u5236\u5230 Bitmap \u4e2d\u7f13\u5b58\u3002\n  <\/p>\n<p>\n   \u6bcf\u6b21\u9700\u8981\u66f4\u65b0 Canvas \u65f6\u90fd\u53ea\u9700\u8981\u5c06\u8fd9\u4e2a\u7f13\u5b58 Bitmap \u7ed8\u5236\u4e0a\u53bb\u5c31\u53ef\u4ee5\u4e86\u3002\n  <\/p>\n<p>\n   \u4e86\u89e3\u4e86\u6211\u4eec\u7684\u56fa\u5b9a\u80cc\u666f\u4e4b\u540e\uff0c\u518d\u5f80\u4e0b\u770b\u3002\n  <\/p>\n<p>\n   \u4e0b\u9762\u6211\u4eec\u7528\u4e86\u4e24\u5c42\u5faa\u73af\uff0c\u4e00\u5c42 while \u6b7b\u5faa\u73af\uff0c\u7528\u4e8e\u6301\u7eed\u751f\u6210\u6d41\u661f\u3002\n  <\/p>\n<p>\n   \u4e00\u5c42 for \u5faa\u73af\uff0c\u7528\u4e8e\u7ed8\u5236\u4e00\u6b21\u6d41\u661f\u7684\u52a8\u753b\u3002\n  <\/p>\n<p>\n   \u5728 while \u5faa\u73af\u4e2d\u6211\u4eec\u521d\u59cb\u5316\u53c2\u6570\uff08\u4e3b\u8981\u662f\u968f\u673a\u751f\u6210\u4e00\u4e2a\u6d41\u661f\u8d77\u70b9\u5750\u6807\uff09\u540e\uff0c\u5f00\u542f for \u5faa\u73af\u5f00\u59cb\u7ed8\u5236\u6d41\u661f\u7684\u6bcf\u4e00\u5e27\u3002\n  <\/p>\n<p>\n   for \u5faa\u73af\u7684\u53c2\u6570\u5373\u4e3a\u6211\u4eec\u7684\u6a21\u62df\u65f6\u95f4\u53c2\u6570\u3002\n  <\/p>\n<p>\n   \u540c\u6837\u7684\uff0c<br \/>\n   <code><br \/>\n    drawMeteor<br \/>\n   <\/code><br \/>\n   \u65b9\u6cd5\u7528\u4e8e\u7ed8\u5236\u6d41\u661f\uff0c\u5177\u4f53\u7ed8\u5236\u4ee3\u7801\u6211\u4eec\u4e5f\u4e0d\u8d34\u4e86\uff0c\u5404\u4f4d\u53ef\u4ee5\u770b\u6211\u4e0a\u7bc7\u6587\u7ae0\u7684\u89e3\u6790\uff0c\u4e5f\u53ef\u4ee5\u76f4\u63a5\u770b\u6e90\u7801\u3002\n  <\/p>\n<p>\n   \u81ea\u6b64\uff0c\u6211\u4eec\u7684\u6240\u6709\u4ee3\u7801\u5c31\u5b8c\u6210\u4e86\u3002\n  <\/p>\n<p>\n   \u6700\u7ec8\u5b9e\u73b0\u6548\u679c\u5982\u4e0b\uff1a\n  <\/p>\n<\/p>\n<h2>\n   <a id=\"_361\"><br \/>\n   <\/a><br \/>\n   \u603b\u7ed3<br \/>\n  <\/h2>\n<p>\n   \u901a\u8fc7\u4e0a\u9762\u7684\u4ee3\u7801\u53ef\u4ee5\u770b\u5230\uff0c\u5176\u5b9e\u5b89\u5353\u7684\u52a8\u6001\u58c1\u7eb8\u5e76\u6ca1\u6709\u60f3\u8c61\u4e2d\u7684\u90a3\u4e48\u56f0\u96be\uff0c\u65e0\u975e\u5c31\u662f\u81ea\u5b9a\u4e49\u7ed8\u5236\u8fd9\u4e00\u5957\uff0c\u5982\u679c\u719f\u6089\u81ea\u5b9a\u4e49\u7ed8\u5236\u7684\u8bdd\uff0c\u5199\u8d77\u6765\u8fd8\u662f\u975e\u5e38\u5bb9\u6613\u7684\u3002\n  <\/p>\n<p>\n   \u4e0d\u8fc7\u6211\u4eec\u8fd9\u91cc\u53ea\u5c55\u793a\u4e86\u4f7f\u7528 Canvas \u7684\u7ed8\u5236\uff0c\u4e8b\u5b9e\u4e0a\uff0c\u7531 SurfaceHolder \u6211\u4eec\u53ef\u4ee5\u6709\u66f4\u591a\u7684&#8221;\u9a9a\u64cd\u4f5c&#8221;\uff0c\u4f8b\u5982\u8c03\u7528\u7b2c\u4e09\u65b9\u6210\u719f\u7684\u52a8\u753b\u5e93\u76f4\u63a5\u5237\u65b0 Surface \u7b49\uff0c\u611f\u5174\u8da3\u7684\u53ef\u4ee5\u53bb\u641c\u4e00\u641c\u3002\n  <\/p>\n<h3>\n   <a id=\"_367\"><br \/>\n   <\/a><br \/>\n   \u4e0b\u4e00\u6b65<br \/>\n  <\/h3>\n<p>\n   \u867d\u7136\u73b0\u5728\u6211\u4eec\u5df2\u7ecf\u5b9e\u73b0\u4e86\u6211\u4eec\u7684\u9700\u6c42\uff0c\u5373\u5c06\u661f\u7a7a\u80cc\u666f\u505a\u6210\u52a8\u6001\u58c1\u7eb8\uff0c\n  <\/p>\n<p>\n   \u4f46\u662f\u4ece\u4ee3\u7801\u4e2d\u4e5f\u53ef\u4ee5\u770b\u5230\uff0c\u6211\u4eec\u6240\u6709\u7684\u53c2\u6570\u90fd\u662f\u5199\u6b7b\u7684\u3002\n  <\/p>\n<p>\n   \u8fd9\u663e\u7136\u4e0d\u7b26\u5408\u5e38\u7406\u3002\n  <\/p>\n<p>\n   \u6240\u4ee5\u6211\u4eec\u4e0b\u4e00\u6b65\u76ee\u6807\u662f\u5c06\u8fd9\u4e9b\u53c2\u6570\u62bd\u51fa\uff0c\u4f5c\u4e3a\u7528\u6237\u53ef\u914d\u7f6e\u7684\u914d\u7f6e\u9879\u3002\n  <\/p>\n<h2>\n   <a id=\"_377\"><br \/>\n   <\/a><br \/>\n   \u53c2\u8003\u8d44\u6599<br \/>\n  <\/h2>\n<ol>\n<li>\n    <a href=\"https:\/\/juejin.cn\/post\/7135998448720936968\" rel=\"nofollow\"><br \/>\n     Android\u58c1\u7eb8\u8fd8\u662fB\u7ad9\u73a9\u5f97\u82b1<br \/>\n    <\/a>\n   <\/li>\n<li>\n    <a href=\"https:\/\/www.developer.com\/design\/building-an-android-live-wallpaper\/\" rel=\"nofollow\"><br \/>\n     Building an Android Live Wallpaper<br \/>\n    <\/a>\n   <\/li>\n<\/ol><\/div>\n<link href=\"https:\/\/csdnimg.cn\/release\/blogv2\/dist\/mdeditor\/css\/editerView\/markdown_views-a5d25dd831.css\" rel=\"stylesheet\"\/>\n <link href=\"https:\/\/csdnimg.cn\/release\/blogv2\/dist\/mdeditor\/css\/style-e504d6a974.css\" rel=\"stylesheet\"\/>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u524d\u8a00 \u5728\u6211\u4e4b\u524d\u7684\u6587\u7ae0 \u7fa1\u6155\u5927\u52b3\u661f\u7a7a\u9876\uff1f\u4e0d\u5982\u8ddf\u6211\u4e00\u8d77\u4f7f\u7528 Jetpack compose \u7ed8\u5236\u4e00\u4e2a\u661f\u7a7a\u80cc\u666f\uff08\u5e26\u6d41 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":215,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-2929","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-8"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u5b89\u5353\u52a8\u753b\u58c1\u7eb8\u5b9e\u6218\uff1a\u5236\u4f5c\u4e00\u4e2a\u661f\u7a7a\u52a8\u6001\u58c1\u7eb8\uff08\u5e26\u968f\u673a\u6d41\u661f\u52a8\u753b\uff09 - \u7269\u5ae9\u8f6f\u4ef6\u8d44\u8baf\u7f51<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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