{"id":109010,"date":"2026-09-23T06:48:44","date_gmt":"2026-09-22T22:48:44","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/109010.html"},"modified":"2026-09-23T06:48:44","modified_gmt":"2026-09-22T22:48:44","slug":"%e3%80%90jetpack-compose%e5%a8%93%e5%a8%93%e9%81%93%e6%9d%a5%e3%80%91%e7%ac%ac1%e8%af%be%ef%bc%9a%e4%bb%8e%e4%bb%8b%e7%bb%8d%e5%bc%80%e5%a7%8b","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/109010.html","title":{"rendered":"\u3010Jetpack 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punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>match_parent<span class=\"token punctuation\">&#034;<\/span><\/span><br \/>\n    <span class=\"token attr-name\"><span class=\"token namespace\">android:<\/span>layout_height<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>wrap_content<span class=\"token punctuation\">&#034;<\/span><\/span><br \/>\n    <span class=\"token attr-name\"><span class=\"token namespace\">android:<\/span>orientation<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>vertical<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>TextView<\/span><br \/>\n        <span class=\"token attr-name\"><span class=\"token namespace\">android:<\/span>id<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>&#064;&#043;id\/messageText<span class=\"token punctuation\">&#034;<\/span><\/span><br \/>\n        <span class=\"token attr-name\"><span class=\"token namespace\">android:<\/span>layout_width<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>wrap_content<span class=\"token punctuation\">&#034;<\/span><\/span><br \/>\n        <span class=\"token attr-name\"><span class=\"token namespace\">android:<\/span>layout_height<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>wrap_content<span class=\"token punctuation\">&#034;<\/span><\/span><br \/>\n        <span class=\"token attr-name\"><span class=\"token namespace\">android:<\/span>text<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>\u4f60\u597d&#xff0c;\u4e16\u754c<span class=\"token punctuation\">&#034;<\/span><\/span><br \/>\n        <span class=\"token attr-name\"><span class=\"token namespace\">android:<\/span>visibility<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>visible<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token punctuation\">\/&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>Button<\/span><br \/>\n        <span class=\"token attr-name\"><span class=\"token namespace\">android:<\/span>id<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>&#064;&#043;id\/toggleButton<span class=\"token punctuation\">&#034;<\/span><\/span><br \/>\n        <span class=\"token attr-name\"><span class=\"token namespace\">android:<\/span>layout_width<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>wrap_content<span class=\"token punctuation\">&#034;<\/span><\/span><br \/>\n        <span class=\"token attr-name\"><span class=\"token namespace\">android:<\/span>layout_height<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>wrap_content<span class=\"token punctuation\">&#034;<\/span><\/span><br \/>\n        <span class=\"token attr-name\"><span class=\"token namespace\">android:<\/span>text<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>\u9690\u85cf<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token punctuation\">\/&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>LinearLayout<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<p>\u7136\u540e\u5728 MainActivity.kt \u91cc\u5199\u903b\u8f91&#xff1a;<\/p>\n<p><span class=\"token keyword\">class<\/span> MainActivity <span class=\"token operator\">:<\/span> <span class=\"token function\">AppCompatActivity<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">var<\/span> isVisible <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">true<\/span><\/p>\n<p>    <span class=\"token keyword\">override<\/span> <span class=\"token keyword\">fun<\/span> <span class=\"token function\">onCreate<\/span><span class=\"token punctuation\">(<\/span>savedInstanceState<span class=\"token operator\">:<\/span> Bundle<span class=\"token operator\">?<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">super<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">onCreate<\/span><span class=\"token punctuation\">(<\/span>savedInstanceState<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token function\">setContentView<\/span><span class=\"token punctuation\">(<\/span>R<span class=\"token punctuation\">.<\/span>layout<span class=\"token punctuation\">.<\/span>activity_main<span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token keyword\">val<\/span> messageText <span class=\"token operator\">&#061;<\/span> 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operator\">!<\/span>isVisible<br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>isVisible<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                messageText<span class=\"token punctuation\">.<\/span>visibility <span class=\"token operator\">&#061;<\/span> View<span class=\"token punctuation\">.<\/span>VISIBLE<br \/>\n                toggleButton<span class=\"token punctuation\">.<\/span>text <span class=\"token operator\">&#061;<\/span> <span class=\"token string-literal singleline\"><span class=\"token string\">&#034;\u9690\u85cf&#034;<\/span><\/span><br \/>\n            <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                messageText<span class=\"token punctuation\">.<\/span>visibility <span class=\"token operator\">&#061;<\/span> View<span class=\"token punctuation\">.<\/span>GONE<br \/>\n                toggleButton<span class=\"token punctuation\">.<\/span>text <span class=\"token operator\">&#061;<\/span> <span class=\"token string-literal singleline\"><span class=\"token string\">&#034;\u663e\u793a&#034;<\/span><\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token 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UI\u5de5\u5177\u3001\u6587\u6863\u3001\u793a\u4f8b\u4ee3\u7801&#xff0c;\u90fd\u4f1a\u4f18\u5148\u56f4\u7ed5Compose\u6765\u6784\u5efa\u3002<\/p>\n<p>\u8fd9\u610f\u5473\u7740\u4ec0\u4e48&#xff1f;\u610f\u5473\u7740\u4ece2026\u5e74\u7684\u89c6\u89d2\u6765\u770b&#xff0c;Compose\u4e0d\u518d\u662f\u201c\u53ef\u4ee5\u5c1d\u8bd5\u7684\u65b0\u4e1c\u897f\u201d&#xff0c;\u800c\u662f Android UI\u5f00\u53d1\u7684\u9ed8\u8ba4\u9009\u62e9\u3002<\/p>\n<p>Compose\u7684\u6838\u5fc3\u601d\u60f3\u53ef\u4ee5\u7528\u4e00\u53e5\u8bdd\u6982\u62ec&#xff1a;\u4f60\u53ea\u9700\u8981\u63cf\u8ff0\u754c\u9762\u201c\u5e94\u8be5\u662f\u4ec0\u4e48\u6837\u201d&#xff0c;\u800c\u4e0d\u7528\u64cd\u5fc3\u201c\u600e\u4e48\u53d8\u6210\u8fd9\u6837\u201d\u3002<\/p>\n<p>\u56de\u5230\u521a\u624d\u7684\u663e\u793a\/\u9690\u85cf\u6587\u5b57\u7684\u4f8b\u5b50\u3002\u7528Compose\u5199&#xff0c;\u5927\u6982\u662f\u8fd9\u4e2a\u6837\u5b50&#xff1a;<\/p>\n<p><span class=\"token annotation builtin\">&#064;Composable<\/span><br \/>\n<span class=\"token keyword\">fun<\/span> <span class=\"token function\">MessageToggle<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">var<\/span> isVisible <span class=\"token keyword\">by<\/span> remember <span class=\"token punctuation\">{<\/span> <span class=\"token function\">mutableStateOf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token function\">Column<\/span><span class=\"token punctuation\">(<\/span>modifier <span class=\"token operator\">&#061;<\/span> Modifier<span class=\"token punctuation\">.<\/span><span class=\"token function\">padding<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">16<\/span><span class=\"token punctuation\">.<\/span>dp<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>isVisible<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">Text<\/span><span class=\"token punctuation\">(<\/span>text <span class=\"token operator\">&#061;<\/span> <span class=\"token string-literal singleline\"><span class=\"token string\">&#034;\u4f60\u597d&#xff0c;\u4e16\u754c&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token function\">Button<\/span><span class=\"token punctuation\">(<\/span>onClick <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span> isVisible <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">!<\/span>isVisible <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">Text<\/span><span class=\"token punctuation\">(<\/span>text <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>isVisible<span class=\"token punctuation\">)<\/span> <span class=\"token string-literal singleline\"><span class=\"token string\">&#034;\u9690\u85cf&#034;<\/span><\/span> <span class=\"token keyword\">else<\/span> <span class=\"token string-literal singleline\"><span class=\"token string\">&#034;\u663e\u793a&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token 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\u58f0\u660e\u5f0f&#xff1a;\u4e00\u4e2a\u751f\u6d3b\u5316\u7684\u6bd4\u55bb<\/h3>\n<p>\u547d\u4ee4\u5f0fUI\u548c\u58f0\u660e\u5f0fUI\u7684\u5dee\u522b&#xff0c;\u53ef\u4ee5\u7528\u4e00\u4e2a\u65e5\u5e38\u573a\u666f\u6765\u7406\u89e3\u3002<\/p>\n<p>\u547d\u4ee4\u5f0f\u5c31\u50cf\u4f60\u6307\u6325\u4e00\u4e2a\u53f8\u673a\u5f00\u8f66&#xff1a;\u201c\u5f80\u524d\u5f00200\u7c73&#xff0c;\u5de6\u8f6c&#xff0c;\u76f4\u884c100\u7c73&#xff0c;\u53f3\u8f6c&#xff0c;\u9760\u8fb9\u505c\u3002\u201d\u6bcf\u4e00\u6b65\u4f60\u90fd\u8981\u7ed9\u51fa\u7cbe\u786e\u7684\u6307\u4ee4\u3002\u5982\u679c\u8def\u51b5\u53d8\u4e86&#xff08;\u6bd4\u5982\u524d\u65b9\u65bd\u5de5&#xff09;&#xff0c;\u4f60\u5f97\u91cd\u65b0\u89c4\u5212\u6bcf\u4e00\u6b65\u3002<\/p>\n<p>\u58f0\u660e\u5f0f\u5c31\u50cf\u4f60\u6253\u5f00\u5bfc\u822a&#xff0c;\u8f93\u5165\u76ee\u7684\u5730&#xff0c;\u7136\u540e\u8bf4&#xff1a;\u201c\u6211\u8981\u53bb\u8fd9\u91cc\u3002\u201d\u5bfc\u822a\u81ea\u5df1\u4f1a\u7b97\u51fa\u8def\u7ebf\u3001\u5904\u7406\u8def\u51b5\u53d8\u5316\u3001\u5728\u9700\u8981\u7684\u65f6\u5019\u91cd\u65b0\u89c4\u5212\u3002\u4f60\u53ea\u5173\u5fc3 \u201c\u6211\u8981\u5230\u54ea\u91cc\u201d &#xff0c;\u4e0d\u5173\u5fc3 \u201c\u600e\u4e48\u5230\u90a3\u91cc\u201d \u3002<\/p>\n<p>\u5728\u4f20\u7edfView\u4f53\u7cfb\u4e0b&#xff0c;\u4f60\u5c31\u662f\u90a3\u4e2a\u4e0d\u505c\u4e0b\u6307\u4ee4\u7684\u6307\u6325\u8005\u3002\u6570\u636e\u53d8\u4e86&#xff0c;\u4f60\u8981\u624b\u52a8\u53bb\u66f4\u65b0\u5bf9\u5e94\u7684View&#xff1b;\u591a\u4e2aView\u663e\u793a\u540c\u4e00\u4efd\u6570\u636e&#xff0c;\u4f60\u5c31\u8981\u786e\u4fdd\u6bcf\u4e00\u5904\u90fd\u66f4\u65b0\u4e86\u3002\u4e00\u65e6\u6f0f\u6389\u4e00\u5904&#xff0c;\u5c31\u4f1a\u51fa\u73b0\u754c\u9762\u548c\u6570\u636e\u4e0d\u4e00\u81f4\u7684Bug\u3002Google\u7684\u5b98\u65b9\u6587\u6863\u4e5f\u660e\u786e\u6307\u51fa&#xff0c;\u624b\u52a8\u64cd\u4f5c\u89c6\u56fe\u4f1a\u589e\u52a0\u51fa\u9519\u7684\u53ef\u80fd\u6027&#xff0c;\u800c\u4e14\u968f\u7740\u9700\u8981\u66f4\u65b0\u7684\u89c6\u56fe\u6570\u91cf\u589e\u52a0&#xff0c;\u7ef4\u62a4\u590d\u6742\u5ea6\u4f1a\u6301\u7eed\u589e\u957f\u3002<\/p>\n<p>\u5728Compose\u7684\u58f0\u660e\u5f0f\u6a21\u578b\u4e0b&#xff0c;\u4f60\u53ea\u63cf\u8ff0\u4e00\u4ef6\u4e8b&#xff1a; \u201c\u5f53\u72b6\u6001\u662fA\u65f6&#xff0c;\u754c\u9762\u957f\u8fd9\u6837&#xff1b;\u5f53\u72b6\u6001\u662fB\u65f6&#xff0c;\u754c\u9762\u957f\u90a3\u6837\u3002\u201d \u72b6\u6001\u53d8\u4e86\u7684\u77ac\u95f4&#xff0c;Compose\u81ea\u52a8\u5b8c\u6210\u4ece\u72b6\u6001\u5230\u754c\u9762\u7684\u6620\u5c04\u3002\u4f60\u4e0d\u9700\u8981\u8ffd\u8e2a\u54ea\u4e9bView\u9700\u8981\u66f4\u65b0&#xff0c;\u4e0d\u9700\u8981\u8bb0\u4f4f\u4e0a\u6b21\u7684\u72b6\u6001\u662f\u4ec0\u4e48\u3002<\/p>\n<p>\u8fd9\u79cd\u601d\u7ef4\u8f6c\u53d8&#xff0c;\u662f\u5b66\u4e60Compose\u6700\u9700\u8981\u8de8\u8d8a\u7684\u95e8\u69db\u3002\u4e00\u65e6\u4e60\u60ef\u4e86&#xff0c;\u4f60\u4f1a\u53d1\u73b0UI\u4ee3\u7801\u53d8\u5f97\u5f02\u5e38\u7b80\u6d01\u548c\u53ef\u9884\u6d4b\u3002<\/p>\n<h3>\u56db\u3001\u53ef\u7ec4\u5408\u51fd\u6570&#xff1a;Compose\u7684\u201c\u57fa\u672c\u7c92\u5b50\u201d<\/h3>\n<p>\u5728Compose\u7684\u4e16\u754c\u91cc&#xff0c;\u4e00\u5207\u754c\u9762\u90fd\u662f\u7531 \u53ef\u7ec4\u5408\u51fd\u6570 \u6784\u6210\u7684\u3002<\/p>\n<p>\u53ef\u7ec4\u5408\u51fd\u6570\u5c31\u662f\u666e\u901a\u7684Kotlin\u51fd\u6570&#xff0c;\u53ea\u4e0d\u8fc7\u5b83\u88ab\u4e00\u4e2a\u7279\u6b8a\u7684\u6ce8\u89e3\u6807\u8bb0\u4e86&#xff1a;&#064;Composable\u3002\u8fd9\u4e2a\u6ce8\u89e3\u544a\u8bc9Compose\u7f16\u8bd1\u5668&#xff1a;\u201c\u8fd9\u4e2a\u51fd\u6570\u662f\u7528\u6765\u63cf\u8ff0\u754c\u9762\u7684\u3002\u201d<\/p>\n<p>\u6765\u770b\u4e00\u4e2a\u6700\u7b80\u5355\u7684\u53ef\u7ec4\u5408\u51fd\u6570&#xff1a;<\/p>\n<p><span class=\"token annotation builtin\">&#064;Composable<\/span><br \/>\n<span class=\"token keyword\">fun<\/span> <span class=\"token function\">Greeting<\/span><span class=\"token punctuation\">(<\/span>name<span class=\"token operator\">:<\/span> String<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">Text<\/span><span class=\"token punctuation\">(<\/span>text <span class=\"token operator\">&#061;<\/span> <span class=\"token string-literal singleline\"><span class=\"token string\">&#034;\u4f60\u597d&#xff0c;<\/span><span class=\"token interpolation\"><span class=\"token interpolation-punctuation punctuation\">$<\/span><span class=\"token expression\">name<\/span><\/span><span class=\"token string\">&#xff01;&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8fd9\u4e2a\u51fd\u6570\u505a\u4e86\u51e0\u4ef6\u4e8b&#xff1a;<\/p>\n<ul>\n<li>\u63a5\u6536\u6570\u636e&#xff1a;name \u53c2\u6570&#xff0c;\u8ba9\u8c03\u7528\u8005\u53ef\u4ee5\u4f20\u5165\u4e0d\u540c\u7684\u540d\u5b57<\/li>\n<li>\u53d1\u5c04UI&#xff1a;\u8c03\u7528 Text() \u53ef\u7ec4\u5408\u51fd\u6570&#xff0c;\u5728\u754c\u9762\u4e0a\u663e\u793a\u4e00\u6bb5\u6587\u5b57<\/li>\n<li>\u4e0d\u8fd4\u56de\u4efb\u4f55\u4e1c\u897f&#xff1a;\u5b83\u63cf\u8ff0\u7684\u662f\u201c\u5c4f\u5e55\u4e0a\u5e94\u8be5\u51fa\u73b0\u4ec0\u4e48\u201d&#xff0c;\u800c\u4e0d\u662f\u201c\u6784\u9020\u4e00\u4e2a\u5bf9\u8c61\u8fd4\u56de\u7ed9\u4f60\u201d<\/li>\n<\/ul>\n<p>\u53ef\u7ec4\u5408\u51fd\u6570\u6709\u51e0\u4e2a\u91cd\u8981\u7684\u7279\u6027&#xff1a;<\/p>\n<p>\u7b2c\u4e00&#xff0c;\u5b83\u53ef\u4ee5\u8c03\u7528\u5176\u4ed6\u53ef\u7ec4\u5408\u51fd\u6570\u3002 Greeting \u8c03\u7528\u4e86 Text&#xff0c;\u800c Text \u672c\u8eab\u4e5f\u662f\u4e00\u4e2a\u53ef\u7ec4\u5408\u51fd\u6570\u3002\u901a\u8fc7\u8fd9\u79cd\u5d4c\u5957&#xff0c;\u4f60\u53ef\u4ee5\u4ece\u6700\u5c0f\u7684UI\u5143\u7d20\u5f00\u59cb&#xff0c;\u4e00\u5c42\u4e00\u5c42\u642d\u5efa\u51fa\u590d\u6742\u7684\u754c\u9762\u3002<\/p>\n<p>\u7b2c\u4e8c&#xff0c;\u5b83\u5e94\u8be5\u662f\u201c\u7eaf\u201d\u7684\u3002 \u5b98\u65b9\u6587\u6863\u5f3a\u8c03&#xff0c;\u53ef\u7ec4\u5408\u51fd\u6570\u5e94\u5f53\u662f\u5e42\u7b49\u7684\u2014\u2014\u540c\u6837\u7684\u8f93\u5165&#xff0c;\u5e94\u8be5\u5f97\u5230\u540c\u6837\u7684\u8f93\u51fa&#xff0c;\u4e0d\u4f9d\u8d56\u5168\u5c40\u53d8\u91cf&#xff0c;\u4e0d\u4ea7\u751f\u526f\u4f5c\u7528&#xff08;\u6bd4\u5982\u4fee\u6539\u5916\u90e8\u53d8\u91cf&#xff09;\u3002\u8fd9\u542c\u8d77\u6765\u662f\u4e2a\u9650\u5236&#xff0c;\u4f46\u5b9e\u9645\u4e0a\u5b83\u8ba9Compose\u80fd\u591f\u667a\u80fd\u5730\u5224\u65ad&#xff1a;\u8fd9\u4e2a\u51fd\u6570\u7684\u8f93\u5165\u6ca1\u53d8&#xff0c;\u90a3\u5b83\u7684\u8f93\u51fa\u4e5f\u4e0d\u7528\u91cd\u65b0\u8ba1\u7b97&#xff0c;\u76f4\u63a5\u590d\u7528\u5c31\u884c\u3002<\/p>\n<p>\u7b2c\u4e09&#xff0c;\u51fd\u6570\u7684\u547d\u540d\u4e60\u60ef\u7528\u5927\u5199\u5f00\u5934\u3002 \u6bd4\u5982 Greeting\u3001MessageCard\u3001UserProfile&#xff0c;\u8fd9\u8ddf\u4f20\u7edfKotlin\u51fd\u6570\u7528\u5c0f\u5199\u5f00\u5934\u7684\u4e60\u60ef\u4e0d\u540c&#xff0c;\u4e3a\u7684\u662f\u5728\u4ee3\u7801\u91cc\u4e00\u773c\u5c31\u80fd\u533a\u5206\u201c\u8fd9\u662fUI\u7ec4\u4ef6\u201d\u548c\u201c\u8fd9\u662f\u666e\u901a\u903b\u8f91\u201d\u3002<\/p>\n<p>\u53ef\u7ec4\u5408\u51fd\u6570\u6700\u5f3a\u5927\u7684\u5730\u65b9\u5728\u4e8e \u7ec4\u5408\u3002\u4f60\u53ef\u4ee5\u628a\u754c\u9762\u62c6\u6210\u4e00\u4e2a\u4e2a\u5c0f\u7684\u3001\u72ec\u7acb\u7684\u53ef\u7ec4\u5408\u51fd\u6570&#xff0c;\u6bcf\u4e2a\u53ea\u8d1f\u8d23\u4e00\u5c0f\u5757\u3002\u5c0f\u7684\u53ef\u4ee5\u7ec4\u5408\u6210\u5927\u7684&#xff0c;\u5927\u7684\u53ef\u4ee5\u7ec4\u5408\u6210\u66f4\u5927\u7684\u3002\u5c31\u50cf\u4e50\u9ad8\u79ef\u6728\u4e00\u6837&#xff0c;\u6bcf\u5757\u79ef\u6728\u5f88\u7b80\u5355&#xff0c;\u4f46\u62fc\u5728\u4e00\u8d77\u53ef\u4ee5\u642d\u51fa\u4efb\u4f55\u4e1c\u897f\u3002\u5b98\u65b9\u6587\u6863\u4e5f\u7279\u522b\u63d0\u5230&#xff0c;\u901a\u8fc7\u5236\u4f5c\u5c0f\u7684\u53ef\u590d\u7528\u53ef\u7ec4\u5408\u9879&#xff0c;\u5f88\u5bb9\u6613\u6784\u5efa\u8d77\u4e00\u4e2a\u5e94\u7528\u7ea7\u522b\u7684UI\u5143\u7d20\u5e93&#xff0c;\u6bcf\u4e2a\u5143\u7d20\u72ec\u7acb\u8d1f\u8d23\u5c4f\u5e55\u7684\u4e00\u90e8\u5206&#xff0c;\u53ef\u4ee5\u5355\u72ec\u7f16\u8f91\u548c\u6d4b\u8bd5\u3002<\/p>\n<h3>\u4e94\u3001\u4e3a\u4ec0\u4e48\u8bf4Compose\u503c\u5f97\u5b66&#xff1a;\u4e94\u4e2a\u5b9e\u6253\u5b9e\u7684\u7406\u7531<\/h3>\n<h4>5.1 \u4ee3\u7801\u91cf\u5927\u5e45\u51cf\u5c11<\/h4>\n<p>\u521a\u624d\u7684\u663e\u793a\/\u9690\u85cf\u793a\u4f8b\u5df2\u7ecf\u5f88\u76f4\u89c2\u4e86\u3002\u5728\u4f20\u7edf\u65b9\u5f0f\u4e0b&#xff0c;\u4f60\u9700\u8981\u4e00\u4e2aXML\u6587\u4ef6\u52a0\u4e00\u4e2aActivity\/Kotlin\u6587\u4ef6&#xff1b;\u5728Compose\u91cc&#xff0c;\u4e00\u4e2a\u51fd\u6570\u5c31\u591f\u4e86\u3002\u5bf9\u4e8e\u66f4\u590d\u6742\u7684\u754c\u9762\u2014\u2014\u6bd4\u5982\u4e00\u4e2a\u5e26\u5934\u50cf\u3001\u540d\u5b57\u3001\u5728\u7ebf\u72b6\u6001\u3001\u64cd\u4f5c\u6309\u94ae\u7684\u7528\u6237\u5361\u7247\u2014\u2014XML\u53ef\u80fd\u9700\u8981\u4e09\u56db\u5341\u884c&#xff0c;Compose\u53ef\u80fd\u53ea\u9700\u8981\u5341\u51e0\u884c\u3002<\/p>\n<p>\u8fd9\u4e0d\u662f\u201c\u5c11\u5199\u4e00\u70b9\u201d\u7684\u95ee\u9898&#xff0c;\u800c\u662f\u4ee3\u7801\u7ec4\u7ec7\u65b9\u5f0f\u7684\u6839\u672c\u53d8\u5316\u3002XML\u548cKotlin\u903b\u8f91\u662f\u5206\u5f00\u7684&#xff0c;\u4f60\u9700\u8981\u5728\u4e24\u4e2a\u6587\u4ef6\u4e4b\u95f4\u6765\u56de\u8df3\u8f6c\u6765\u7406\u89e3\u4e00\u4e2a\u754c\u9762\u3002Compose\u628a\u5e03\u5c40\u548c\u903b\u8f91\u653e\u5728\u540c\u4e00\u4e2a\u51fd\u6570\u91cc&#xff0c;\u4ee3\u7801\u7684\u5c40\u90e8\u6027\u66f4\u597d&#xff0c;\u9605\u8bfb\u548c\u7ef4\u62a4\u90fd\u66f4\u8f7b\u677e\u3002<\/p>\n<h4>5.2 \u72b6\u6001\u9a71\u52a8&#xff0c;\u544a\u522b\u624b\u52a8\u540c\u6b65<\/h4>\n<p>\u8fd9\u662f\u6700\u6838\u5fc3\u7684\u6539\u53d8\u3002\u5728Compose\u91cc&#xff0c;\u4f60\u4e0d\u9700\u8981\u624b\u52a8\u8c03\u7528 findViewById&#xff0c;\u4e0d\u9700\u8981\u8bb0\u4f4f\u54ea\u4e2aView\u7ed1\u5b9a\u4e86\u54ea\u4e2a\u6570\u636e\u3002\u4f60\u53ea\u9700\u8981\u5b9a\u4e49\u72b6\u6001&#xff0c;\u7136\u540e\u8bf4\u201c\u5f53\u72b6\u6001\u662f\u8fd9\u6837\u7684\u65f6\u5019&#xff0c;\u754c\u9762\u5e94\u8be5\u662f\u90a3\u6837\u201d\u3002<\/p>\n<p>\u5f53\u72b6\u6001\u53d8\u5316\u65f6&#xff0c;Compose\u4f1a\u81ea\u52a8\u627e\u51fa\u54ea\u4e9b\u754c\u9762\u4f9d\u8d56\u4e86\u8fd9\u4e2a\u72b6\u6001&#xff0c;\u53ea\u91cd\u65b0\u6267\u884c\u90a3\u4e9b\u90e8\u5206\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u53eb\u505a\u91cd\u7ec4 \u3002\u4f60\u4e0d\u7528\u64cd\u5fc3\u201c\u54ea\u4e9bView\u9700\u8981\u66f4\u65b0\u201d&#xff0c;\u6846\u67b6\u5e2e\u4f60\u505a\u4e86\u8fd9\u4ef6\u4e8b\u3002<\/p>\n<h4>5.3 \u539f\u751f\u6027\u80fd&#xff0c;\u6eda\u52a8\u6d41\u7545\u5ea6\u5df2\u8ffd\u5e73View<\/h4>\n<p>\u65e9\u671f\u7248\u672c\u7684Compose\u5728\u6027\u80fd\u4e0a\u786e\u5b9e\u548cView\u6709\u4e00\u5b9a\u5dee\u8ddd&#xff0c;\u4f46\u8fd9\u4e2a\u95ee\u9898\u5df2\u7ecf\u57fa\u672c\u89e3\u51b3\u4e86\u3002\u6839\u636eGoogle\u7684\u8def\u7ebf\u56fe&#xff0c;\u4eceCompose 1.9.0\u5f00\u59cb&#xff0c;\u6eda\u52a8\u6027\u80fd&#xff08;\u4ee5\u5361\u987f\u4e3a\u6307\u6807&#xff09;\u5df2\u7ecf\u4e0eView\u6301\u5e73\u3002<\/p>\n<p>Compose\u901a\u8fc7\u667a\u80fd\u8df3\u8fc7\u673a\u5236\u6765\u4f18\u5316\u6027\u80fd&#xff1a;\u5982\u679c\u4e00\u4e2a\u53ef\u7ec4\u5408\u51fd\u6570\u7684\u8f93\u5165\u53c2\u6570\u6ca1\u6709\u53d8\u5316&#xff0c;Compose\u4f1a\u5b8c\u5168\u8df3\u8fc7\u5b83\u7684\u91cd\u65b0\u6267\u884c&#xff0c;\u76f4\u63a5\u590d\u7528\u4e4b\u524d\u7684UI\u8f93\u51fa\u3002\u8fd9\u79cd\u4f18\u5316\u5728\u5217\u8868\u6eda\u52a8\u7b49\u9ad8\u9891\u573a\u666f\u4e0b\u6548\u679c\u663e\u8457\u3002<\/p>\n<h4>5.4 \u5f00\u53d1\u5de5\u5177\u5f3a\u5927&#xff0c;\u9884\u89c8\u5373\u6240\u5f97<\/h4>\n<p>Android Studio\u4e3aCompose\u63d0\u4f9b\u4e86\u4e13\u95e8\u7684\u5f00\u53d1\u4f53\u9a8c\u3002&#064;Preview \u6ce8\u89e3\u53ef\u4ee5\u8ba9\u4f60\u5728IDE\u91cc\u76f4\u63a5\u770b\u5230UI\u7684\u6e32\u67d3\u6548\u679c&#xff0c;\u4e0d\u7528\u628a\u5e94\u7528\u8dd1\u5230\u8bbe\u5907\u4e0a\u3002\u914d\u5408\u5b9e\u65f6\u7f16\u8f91\u529f\u80fd&#xff0c;\u4f60\u6539\u4e00\u884c\u4ee3\u7801&#xff0c;\u9884\u89c8\u7acb\u523b\u66f4\u65b0\u3002<\/p>\n<p>\u8fd8\u6709\u4e00\u4e2a\u5f88\u5b9e\u7528\u7684\u53d8\u5316&#xff1a;\u65b0\u7684Android Studio UI\u5de5\u5177\u53ea\u9762\u5411Compose\u6784\u5efa&#xff0c;\u4f20\u7edf\u7684\u5e03\u5c40\u7f16\u8f91\u5668\u548c\u5bfc\u822a\u7f16\u8f91\u5668\u5df2\u7ecf\u4e0d\u518d\u83b7\u5f97\u65b0\u529f\u80fd\u3002<\/p>\n<h4>5.5 \u81ea\u9002\u5e94\u5e03\u5c40&#xff1a;\u4e00\u5957\u4ee3\u7801\u9002\u914d\u591a\u79cd\u8bbe\u5907<\/h4>\n<p>Compose\u5728\u8bbe\u8ba1\u4e4b\u521d\u5c31\u8003\u8651\u4e86\u81ea\u9002\u5e94\u7684\u95ee\u9898\u3002\u624b\u673a\u3001\u5e73\u677f\u3001\u6298\u53e0\u5c4f\u3001\u751a\u81f3\u684c\u9762\u7aef\u7684Android\u5e94\u7528&#xff0c;Compose\u90fd\u63d0\u4f9b\u4e86\u7edf\u4e00\u7684\u5de5\u5177\u6765\u9002\u914d\u4e0d\u540c\u5c4f\u5e55\u5c3a\u5bf8\u3002\u5b98\u65b9\u660e\u786e\u8868\u793a&#xff0c;Compose\u662f\u6784\u5efa\u81ea\u9002\u5e94\u5e94\u7528\u6700\u7b80\u5355\u7684\u65b9\u5f0f\u3002<\/p>\n<h3>\u516d\u3001Compose\u7684\u67b6\u6784\u5206\u5c42&#xff1a;\u4e86\u89e3\u5b83\u7684\u201c\u5185\u529f\u201d<\/h3>\n<p>\u4f60\u4e0d\u9700\u8981\u4e00\u5f00\u59cb\u5c31\u6df1\u5165\u7406\u89e3Compose\u7684\u6bcf\u4e00\u5c42\u67b6\u6784&#xff0c;\u4f46\u77e5\u9053\u5b83\u7684\u5206\u5c42\u8bbe\u8ba1\u6709\u52a9\u4e8e\u4f60\u7406\u89e3\u201c\u4e3a\u4ec0\u4e48Compose\u80fd\u505a\u5230\u8fd9\u4e9b\u201d\u3002<\/p>\n<p>Jetpack Compose\u4e0d\u662f\u4e00\u4e2a\u5927\u800c\u5168\u7684\u5e93&#xff0c;\u800c\u662f\u7531\u591a\u4e2a\u6a21\u5757\u7ec4\u88c5\u800c\u6210\u7684\u3002\u4ece\u5e95\u5c42\u5230\u4e0a\u5c42&#xff0c;\u4e3b\u8981\u5206\u4e3a\u56db\u5c42\u3002<\/p>\n<p>\u6700\u5e95\u5c42\u662fRuntime&#xff08;\u8fd0\u884c\u65f6&#xff09; \u3002\u8fd9\u4e00\u5c42\u63d0\u4f9b\u4e86Compose\u6700\u6838\u5fc3\u7684\u673a\u5236&#xff1a;remember\u3001mutableStateOf\u3001&#064;Composable \u6ce8\u89e3\u3001\u72b6\u6001\u8ffd\u8e2a\u7b49\u3002\u5b83\u7ba1\u7684\u662f\u201c\u72b6\u6001\u600e\u4e48\u5b58\u3001\u4ec0\u4e48\u65f6\u5019\u91cd\u7ec4\u201d\u8fd9\u7c7b\u5e95\u5c42\u903b\u8f91&#xff0c;\u8ddf\u5177\u4f53\u7684UI\u957f\u4ec0\u4e48\u6837\u6ca1\u6709\u5173\u7cfb\u3002<\/p>\n<p>\u7b2c\u4e8c\u5c42\u662fUI\u5c42\u3002\u8fd9\u4e00\u5c42\u5f00\u59cb\u6d89\u53ca\u754c\u9762\u4e86&#xff0c;\u5b83\u8d1f\u8d23\u5e03\u5c40\u8282\u70b9\u7684\u7ba1\u7406\u3001Modifier \u7cfb\u7edf\u3001\u8f93\u5165\u4e8b\u4ef6\u5904\u7406\u3001\u81ea\u5b9a\u4e49\u5e03\u5c40\u548c\u7ed8\u5236\u3002Modifier \u662fCompose\u91cc\u4e00\u4e2a\u5f88\u91cd\u8981\u7684\u6982\u5ff5\u2014\u2014\u4f60\u53ef\u4ee5\u628a\u5b83\u7406\u89e3\u6210\u201c\u7ed9\u4e00\u4e2aUI\u5143\u7d20\u9644\u52a0\u7684\u5404\u79cd\u5c5e\u6027\u201d&#xff0c;\u6bd4\u5982\u5185\u8fb9\u8ddd\u3001\u80cc\u666f\u8272\u3001\u70b9\u51fb\u4e8b\u4ef6\u7b49\u3002<\/p>\n<p>\u7b2c\u4e09\u5c42\u662fFoundation&#xff08;\u57fa\u7840\u5c42&#xff09; \u3002\u8fd9\u4e00\u5c42\u63d0\u4f9b\u4e86\u4e0e\u8bbe\u8ba1\u7cfb\u7edf\u65e0\u5173\u7684\u6784\u5efa\u5757&#xff0c;\u6bd4\u5982 Row&#xff08;\u6a2a\u5411\u6392\u5217&#xff09;\u3001Column&#xff08;\u7eb5\u5411\u6392\u5217&#xff09;\u3001LazyColumn&#xff08;\u61d2\u52a0\u8f7d\u5217\u8868&#xff09;\u3001\u624b\u52bf\u8bc6\u522b\u7b49\u3002\u5982\u679c\u4f60\u53ea\u662f\u60f3\u8981\u57fa\u672c\u7684\u5e03\u5c40\u80fd\u529b&#xff0c;Foundation\u5c31\u591f\u4e86\u3002<\/p>\n<p>\u6700\u4e0a\u5c42\u662fMaterial\u5c42\u3002\u8fd9\u4e00\u5c42\u662fMaterial Design\u5728Compose\u4e2d\u7684\u5b9e\u73b0&#xff0c;\u63d0\u4f9b\u4e86\u4e3b\u9898\u7cfb\u7edf\u3001\u6309\u94ae\u3001\u5361\u7247\u3001\u9876\u90e8\u680f\u7b49\u9884\u5236\u7684Material\u7ec4\u4ef6\u3002<\/p>\n<p>\u8fd9\u4e2a\u5206\u5c42\u8bbe\u8ba1\u7684\u7cbe\u5999\u4e4b\u5904\u5728\u4e8e&#xff1a;\u6bcf\u4e00\u5c42\u90fd\u5efa\u7acb\u5728\u4e0b\u9762\u4e00\u5c42\u4e4b\u4e0a&#xff0c;\u4f46\u4f60\u53ef\u4ee5\u5728\u4efb\u4f55\u4e00\u5c42\u5f00\u59cb\u6784\u5efa\u3002 \u5982\u679c\u4f60\u53ea\u9700\u8981Compose\u7684\u72b6\u6001\u7ba1\u7406\u80fd\u529b&#xff0c;\u53ef\u4ee5\u53ea\u7528Runtime\u5c42&#xff1b;\u5982\u679c\u4f60\u60f3\u8981\u5b8c\u6574\u7684Material Design\u4f53\u9a8c&#xff0c;\u76f4\u63a5\u7528\u6700\u4e0a\u5c42\u7684\u7ec4\u4ef6\u5c31\u597d\u3002\u5b98\u65b9\u5f3a\u8c03&#xff0c;Compose\u7684\u6307\u5bfc\u539f\u5219\u662f\u63d0\u4f9b\u4e00\u7cfb\u5217\u5c0f\u800c\u53ef\u7ec4\u5408\u7684\u6a21\u5757&#xff0c;\u800c\u4e0d\u662f\u51e0\u4e2a\u5e9e\u5927\u7684\u5355\u4f53\u7ec4\u4ef6\u3002<\/p>\n<h3>\u4e03\u3001Compose\u4e0e\u4f20\u7edfView\u7684\u5bf9\u6bd4&#xff1a;\u4e00\u5f20\u201c\u5927\u767d\u8bdd\u201d\u6e05\u5355<\/h3>\n<p>\u628a\u4e24\u79cd\u65b9\u5f0f\u653e\u5728\u4e00\u8d77\u5bf9\u6bd4&#xff0c;\u5dee\u5f02\u4f1a\u66f4\u6e05\u695a&#xff1a;<\/p>\n<table>\n<tr>\u5bf9\u6bd4\u7ef4\u5ea6\u4f20\u7edfXML &#043; ViewJetpack Compose<\/tr>\n<tbody>\n<tr>\n<td>\u754c\u9762\u5b9a\u4e49\u65b9\u5f0f<\/td>\n<td>XML\u6587\u4ef6\u5b9a\u4e49\u5e03\u5c40<\/td>\n<td>Kotlin\u51fd\u6570\u63cf\u8ff0\u754c\u9762<\/td>\n<\/tr>\n<tr>\n<td>\u7f16\u7a0b\u8303\u5f0f<\/td>\n<td>\u547d\u4ee4\u5f0f&#xff1a;\u624b\u52a8\u66f4\u65b0View<\/td>\n<td>\u58f0\u660e\u5f0f&#xff1a;\u72b6\u6001\u9a71\u52a8\u81ea\u52a8\u66f4\u65b0<\/td>\n<\/tr>\n<tr>\n<td>\u67e5\u627e\u89c6\u56fe<\/td>\n<td>findViewById \/ ViewBinding<\/td>\n<td>\u4e0d\u9700\u8981&#xff0c;\u76f4\u63a5\u8c03\u7528\u53ef\u7ec4\u5408\u51fd\u6570<\/td>\n<\/tr>\n<tr>\n<td>\u72b6\u6001\u540c\u6b65<\/td>\n<td>\u624b\u52a8\u540c\u6b65\u6570\u636e\u548c\u754c\u9762<\/td>\n<td>\u81ea\u52a8\u91cd\u7ec4&#xff0c;\u72b6\u6001\u53d8\u4e86\u754c\u9762\u8ddf\u7740\u53d8<\/td>\n<\/tr>\n<tr>\n<td>\u5e03\u5c40\u4e0e\u903b\u8f91<\/td>\n<td>\u5206\u5f00\u5728\u4e24\u4e2a\u6587\u4ef6\u4e2d<\/td>\n<td>\u5728\u540c\u4e00\u4e2a\u51fd\u6570\u4e2d<\/td>\n<\/tr>\n<tr>\n<td>\u9884\u89c8<\/td>\n<td>\u5e03\u5c40\u7f16\u8f91\u5668<\/td>\n<td>&#064;Preview \u6ce8\u89e3&#xff0c;\u652f\u6301\u5b9e\u65f6\u7f16\u8f91<\/td>\n<\/tr>\n<tr>\n<td>\u6700\u5c0fAPI\u652f\u6301<\/td>\n<td>\u5404\u7248\u672c\u4e0d\u540c<\/td>\n<td>API 21&#043;&#xff08;Android 5.0\u53ca\u4ee5\u4e0a&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u7ec4\u4ef6\u590d\u7528<\/td>\n<td>\u81ea\u5b9a\u4e49View\u8f83\u590d\u6742<\/td>\n<td>\u53ef\u7ec4\u5408\u51fd\u6570\u5929\u7136\u53ef\u590d\u7528<\/td>\n<\/tr>\n<tr>\n<td>\u5f53\u524d\u72b6\u6001<\/td>\n<td>\u7ef4\u62a4\u6a21\u5f0f&#xff0c;\u4ec5\u5173\u952e\u4fee\u590d<\/td>\n<td>Compose-first&#xff0c;\u6301\u7eed\u66f4\u65b0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u5173\u4e8e\u6700\u5c0fAPI\u652f\u6301&#xff1a;Compose\u53ea\u9700\u8981 API level 21&#xff08;Android 5.0&#xff09;\u53ca\u4ee5\u4e0a\u5373\u53ef\u4f7f\u7528&#xff0c;\u8986\u76d6\u9762\u5df2\u7ecf\u975e\u5e38\u5e7f\u3002<\/p>\n<p>\u5173\u4e8e\u201c\u7ef4\u62a4\u6a21\u5f0f\u201d&#xff1a;Google\u660e\u786e\u8868\u793a&#xff0c;View\u5de5\u5177\u5305&#xff08;\u5982 android.widget \u5305\u4e2d\u7684 TextView\u3001ListView \u7b49&#xff09;\u73b0\u5728\u5904\u4e8e\u7ef4\u62a4\u6a21\u5f0f&#xff0c;\u53ea\u4f1a\u6536\u5230\u9ad8\u5ea6\u5173\u952e\u7684\u4fee\u590d\u3002\u4f20\u7edf\u7684\u57fa\u4e8eView\u7684Jetpack\u5e93\u4e5f\u4e0d\u4f1a\u83b7\u5f97\u91cd\u5927\u66f4\u65b0\u3002\u6240\u6709\u65b0\u7684Android Studio UI\u5de5\u5177\u53ea\u9762\u5411Compose\u6784\u5efa\u3002<\/p>\n<h3>\u516b\u3001\u72b6\u6001\u7ba1\u7406&#xff1a;Compose\u7684\u201c\u5f15\u64ce\u201d<\/h3>\n<p>\u72b6\u6001\u662fCompose\u6700\u6838\u5fc3\u7684\u6982\u5ff5\u4e4b\u4e00\u3002\u7406\u89e3\u72b6\u6001&#xff0c;\u5c31\u7406\u89e3\u4e86Compose\u7684\u201c\u5f15\u64ce\u201d\u662f\u600e\u4e48\u5de5\u4f5c\u7684\u3002<\/p>\n<h4>8.1 \u4e00\u4e2a\u201c\u4e0d\u5de5\u4f5c\u201d\u7684\u4f8b\u5b50<\/h4>\n<p>\u5148\u770b\u4e00\u6bb5\u770b\u8d77\u6765\u5408\u7406\u3001\u4f46\u5b9e\u9645\u4e0d\u4f1a\u5de5\u4f5c\u7684\u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token annotation builtin\">&#064;Composable<\/span><br \/>\n<span class=\"token keyword\">fun<\/span> <span class=\"token function\">Greeting<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">var<\/span> expanded <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">false<\/span>  <span class=\"token comment\">\/\/ \u8fd9\u6837\u5199\u4e0d\u5bf9&#xff01;<\/span><\/p>\n<p>    Column <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">Text<\/span><span class=\"token punctuation\">(<\/span>text <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>expanded<span class=\"token punctuation\">)<\/span> <span class=\"token string-literal singleline\"><span class=\"token string\">&#034;\u5c55\u5f00\u7684\u5185\u5bb9&#034;<\/span><\/span> <span class=\"token keyword\">else<\/span> <span class=\"token string-literal singleline\"><span class=\"token string\">&#034;&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token function\">Button<\/span><span class=\"token punctuation\">(<\/span>onClick <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span> expanded <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">!<\/span>expanded <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">Text<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>expanded<span class=\"token punctuation\">)<\/span> <span class=\"token string-literal singleline\"><span class=\"token string\">&#034;\u6536\u8d77&#034;<\/span><\/span> <span class=\"token keyword\">else<\/span> <span class=\"token string-literal singleline\"><span class=\"token string\">&#034;\u5c55\u5f00&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u70b9\u51fb\u6309\u94ae&#xff0c;expanded \u786e\u5b9e\u53d8\u4e86&#xff0c;\u4f46\u754c\u9762\u4e0d\u4f1a\u66f4\u65b0\u3002\u539f\u56e0\u6709\u4e24\u4e2a&#xff1a;<\/p>\n<p>\u7b2c\u4e00&#xff0c;\u666e\u901a\u7684\u53d8\u91cf\u8d4b\u503c\u4e0d\u4f1a\u88abCompose\u8ffd\u8e2a\u3002Compose\u4e0d\u77e5\u9053\u8fd9\u4e2a\u53d8\u91cf\u53d8\u4e86&#xff0c;\u81ea\u7136\u4e5f\u4e0d\u4f1a\u89e6\u53d1\u91cd\u7ec4\u3002<\/p>\n<p>\u7b2c\u4e8c&#xff0c;\u5373\u4f7fCompose\u8ffd\u8e2a\u4e86&#xff0c;\u6bcf\u6b21 Greeting \u51fd\u6570\u88ab\u91cd\u65b0\u6267\u884c\u65f6&#xff0c;var expanded &#061; false \u90fd\u4f1a\u628a\u503c\u91cd\u7f6e\u56de false&#xff0c;\u72b6\u6001\u4e22\u5931\u4e86\u3002<\/p>\n<h4>8.2 mutableStateOf &#043; remember<\/h4>\n<p>\u8981\u8ba9Compose\u201c\u77e5\u9053\u201d\u4e00\u4e2a\u503c\u7684\u53d8\u5316&#xff0c;\u9700\u8981\u7528 mutableStateOf \u6765\u5305\u88c5\u5b83&#xff1a;<\/p>\n<p><span class=\"token keyword\">val<\/span> expanded <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">mutableStateOf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>mutableStateOf \u521b\u5efa\u7684\u662f\u4e00\u4e2a\u53ef\u89c2\u5bdf\u7684\u72b6\u6001\u5bf9\u8c61\u3002\u5f53\u5b83\u7684 value \u53d1\u751f\u53d8\u5316\u65f6&#xff0c;\u6240\u6709\u8bfb\u53d6\u4e86\u8fd9\u4e2a\u72b6\u6001\u7684\u53ef\u7ec4\u5408\u51fd\u6570\u90fd\u4f1a\u88ab\u6807\u8bb0\u4e3a\u201c\u9700\u8981\u91cd\u65b0\u6267\u884c\u201d\u3002<\/p>\n<p>\u4f46\u662f\u5149\u7528 mutableStateOf \u8fd8\u4e0d\u591f\u3002\u56e0\u4e3a\u53ef\u7ec4\u5408\u51fd\u6570\u968f\u65f6\u53ef\u80fd\u88ab\u91cd\u65b0\u6267\u884c&#xff08;\u91cd\u7ec4&#xff09;&#xff0c;\u5982\u679c\u6bcf\u6b21\u6267\u884c\u90fd\u521b\u5efa\u4e00\u4e2a\u65b0\u7684 mutableStateOf(false)&#xff0c;\u72b6\u6001\u5c31\u4e22\u4e86\u3002\u6240\u4ee5\u8fd8\u9700\u8981 remember \u6765\u5e2e\u5fd9&#xff1a;<\/p>\n<p><span class=\"token keyword\">val<\/span> expanded <span class=\"token operator\">&#061;<\/span> remember <span class=\"token punctuation\">{<\/span> <span class=\"token function\">mutableStateOf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<p>remember \u7684\u4f5c\u7528\u662f&#xff1a;\u5728\u9996\u6b21\u7ec4\u5408\u65f6\u8ba1\u7b97\u5e76\u5b58\u50a8\u4e00\u4e2a\u503c&#xff0c;\u5728\u540e\u7eed\u91cd\u7ec4\u4e2d\u8fd4\u56de\u540c\u4e00\u4e2a\u503c&#xff0c;\u4e0d\u91cd\u65b0\u8ba1\u7b97\u3002<\/p>\n<p>\u5408\u5728\u4e00\u8d77&#xff0c;\u6b63\u786e\u5199\u6cd5\u662f&#xff1a;<\/p>\n<p><span class=\"token annotation builtin\">&#064;Composable<\/span><br \/>\n<span class=\"token keyword\">fun<\/span> <span class=\"token function\">Greeting<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">var<\/span> expanded <span class=\"token keyword\">by<\/span> remember <span class=\"token punctuation\">{<\/span> <span class=\"token function\">mutableStateOf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<p>    Column <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>expanded<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">Text<\/span><span class=\"token punctuation\">(<\/span>text <span class=\"token operator\">&#061;<\/span> <span class=\"token string-literal singleline\"><span class=\"token string\">&#034;\u5c55\u5f00\u7684\u5185\u5bb9&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token function\">Button<\/span><span class=\"token punctuation\">(<\/span>onClick <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span> expanded <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">!<\/span>expanded <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">Text<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>expanded<span class=\"token punctuation\">)<\/span> <span class=\"token string-literal singleline\"><span class=\"token string\">&#034;\u6536\u8d77&#034;<\/span><\/span> <span class=\"token keyword\">else<\/span> <span class=\"token string-literal singleline\"><span class=\"token string\">&#034;\u5c55\u5f00&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8fd9\u91cc\u7528\u4e86Kotlin\u7684 by \u59d4\u6258\u8bed\u6cd5&#xff0c;\u8bfb\u548c\u5199 expanded \u5c31\u50cf\u64cd\u4f5c\u666e\u901a\u53d8\u91cf\u4e00\u6837&#xff0c;\u5b9e\u9645\u4e0a\u5e95\u5c42\u662f\u5728\u64cd\u4f5c MutableState \u7684 value \u5c5e\u6027\u3002<\/p>\n<h4>8.3 \u72b6\u6001\u63d0\u5347&#xff1a;\u8ba9\u72b6\u6001\u201c\u4f4f\u201d\u5728\u5408\u9002\u7684\u5730\u65b9<\/h4>\n<p>\u6709\u65f6\u5019&#xff0c;\u4e00\u4e2a\u72b6\u6001\u4e0d\u53ea\u662f\u4e00\u4e2a\u53ef\u7ec4\u5408\u51fd\u6570\u5185\u90e8\u7684\u4e8b\u3002\u6bd4\u5982&#xff0c;\u7236\u7ec4\u4ef6\u548c\u5b50\u7ec4\u4ef6\u53ef\u80fd\u90fd\u9700\u8981\u8bfb\u5199\u540c\u4e00\u4e2a\u72b6\u6001\u3002<\/p>\n<p>Compose\u7684\u89e3\u51b3\u529e\u6cd5\u53eb\u72b6\u6001\u63d0\u5347 &#xff1a;\u628a\u72b6\u6001\u4ece\u5b50\u7ec4\u4ef6\u201c\u63d0\u5347\u201d\u5230\u5b83\u4eec\u7684\u5171\u540c\u7236\u7ec4\u4ef6\u4e2d&#xff0c;\u5b50\u7ec4\u4ef6\u901a\u8fc7\u53c2\u6570\u63a5\u6536\u72b6\u6001\u503c&#xff0c;\u901a\u8fc7\u56de\u8c03\u51fd\u6570\u901a\u77e5\u7236\u7ec4\u4ef6\u72b6\u6001\u5e94\u8be5\u600e\u4e48\u53d8\u3002<\/p>\n<p><span class=\"token annotation builtin\">&#064;Composable<\/span><br \/>\n<span class=\"token keyword\">fun<\/span> <span class=\"token function\">Parent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">var<\/span> text <span class=\"token keyword\">by<\/span> remember <span class=\"token punctuation\">{<\/span> <span class=\"token function\">mutableStateOf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-literal singleline\"><span class=\"token string\">&#034;&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<p>    Column <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">Child<\/span><span class=\"token punctuation\">(<\/span><br \/>\n            value <span class=\"token operator\">&#061;<\/span> text<span class=\"token punctuation\">,<\/span><br \/>\n            onValueChange <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span> text <span class=\"token operator\">&#061;<\/span> it <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token function\">Text<\/span><span class=\"token punctuation\">(<\/span>text <span class=\"token operator\">&#061;<\/span> <span class=\"token string-literal singleline\"><span class=\"token string\">&#034;\u4f60\u8f93\u5165\u4e86&#xff1a;<\/span><span class=\"token interpolation\"><span class=\"token interpolation-punctuation punctuation\">$<\/span><span class=\"token expression\">text<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token annotation builtin\">&#064;Composable<\/span><br \/>\n<span class=\"token keyword\">fun<\/span> <span class=\"token function\">Child<\/span><span class=\"token punctuation\">(<\/span><br \/>\n    value<span class=\"token operator\">:<\/span> String<span class=\"token punctuation\">,<\/span><br \/>\n    onValueChange<span class=\"token operator\">:<\/span> <span class=\"token punctuation\">(<\/span>String<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">-&gt;<\/span> Unit<br \/>\n<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">TextField<\/span><span class=\"token punctuation\">(<\/span><br \/>\n        value <span class=\"token operator\">&#061;<\/span> value<span class=\"token punctuation\">,<\/span><br \/>\n        onValueChange <span class=\"token operator\">&#061;<\/span> onValueChange<br \/>\n    <span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>Child \u4e0d\u6301\u6709\u72b6\u6001&#xff0c;\u5b83\u53ea\u8d1f\u8d23\u201c\u663e\u793a\u201d\u548c\u201c\u901a\u77e5\u201d\u3002\u72b6\u6001\u7531 Parent \u6301\u6709\u3002\u8fd9\u79cd\u6a21\u5f0f\u53eb\u505a\u5355\u5411\u6570\u636e\u6d41&#xff1a;\u6570\u636e\u4ece\u7236\u6d41\u5411\u5b50&#xff0c;\u4e8b\u4ef6\u4ece\u5b50\u6d41\u56de\u7236\u3002\u5b98\u65b9\u6587\u6863\u6307\u51fa&#xff0c;\u7531\u4e8e\u53ef\u7ec4\u5408\u51fd\u6570\u63a5\u53d7\u72b6\u6001\u5e76\u516c\u5f00\u4e8b\u4ef6&#xff08;\u5982 TextField \u63a5\u53d7\u503c\u5e76\u516c\u5f00 onValueChange \u56de\u8c03&#xff09;&#xff0c;\u5355\u5411\u6570\u636e\u6d41\u6a21\u5f0f\u5929\u7136\u9002\u7528\u4e8eJetpack Compose\u3002<\/p>\n<p>\u72b6\u6001\u63d0\u5347\u7684\u597d\u5904\u662f&#xff1a;\u72b6\u6001\u7684\u6765\u6e90\u53d8\u5f97\u6e05\u6670\u53ef\u8ffd\u6eaf&#xff0c;\u6d4b\u8bd5\u8d77\u6765\u4e5f\u66f4\u5bb9\u6613\u2014\u2014\u4f60\u4e0d\u9700\u8981\u542f\u52a8\u6574\u4e2aUI&#xff0c;\u53ea\u9700\u8981\u7ed9\u51fd\u6570\u4f20\u5165\u4e0d\u540c\u7684\u53c2\u6570\u5c31\u80fd\u6d4b\u8bd5\u5b83\u7684\u884c\u4e3a\u3002<\/p>\n<h3>\u4e5d\u3001\u4ece\u96f6\u642d\u5efa\u4e00\u4e2aCompose\u9879\u76ee<\/h3>\n<p>\u8bb2\u4e86\u8fd9\u4e48\u591a\u6982\u5ff5&#xff0c;\u662f\u65f6\u5019\u52a8\u624b\u4e86\u3002<\/p>\n<h4>9.1 \u73af\u5883\u8981\u6c42<\/h4>\n<ul>\n<li>Android Studio&#xff1a;\u5efa\u8bae\u4f7f\u7528\u6700\u65b0\u7a33\u5b9a\u7248\u3002Compose\u7684\u5f00\u53d1\u4f53\u9a8c\u9ad8\u5ea6\u4f9d\u8d56IDE\u5de5\u5177\u94fe\u3002<\/li>\n<li>Kotlin&#xff1a;Compose\u5b8c\u5168\u57fa\u4e8eKotlin&#xff0c;\u9700\u8981\u786e\u4fdd\u9879\u76ee\u5df2\u7ecf\u914d\u7f6e\u4e86Kotlin\u652f\u6301\u3002<\/li>\n<li>\u6700\u5c0fAPI&#xff1a;API 21&#xff08;Android 5.0&#xff09;\u53ca\u4ee5\u4e0a\u3002<\/li>\n<\/ul>\n<h4>9.2 \u521b\u5efa\u9879\u76ee<\/h4>\n<p>\u6253\u5f00Android Studio&#xff0c;\u5728\u6b22\u8fce\u754c\u9762\u70b9\u51fb New Project&#xff08;\u5982\u679c\u5df2\u7ecf\u6253\u5f00\u4e86\u9879\u76ee&#xff0c;\u9009\u62e9 File &gt; New &gt; New Project&#xff09;\u3002\u5728\u6a21\u677f\u5217\u8868\u4e2d\u9009\u62e9 Empty Activity\u3002\u5728\u914d\u7f6e\u754c\u9762\u4e2d&#xff0c;\u786e\u4fdd\u8bed\u8a00\u9009\u62e9 Kotlin\u2014\u2014Jetpack Compose\u53ea\u652f\u6301Kotlin\u3002<\/p>\n<p>\u521b\u5efa\u5b8c\u6210\u540e&#xff0c;Android Studio\u4f1a\u81ea\u52a8\u5e2e\u4f60\u914d\u7f6e\u597dCompose\u6240\u9700\u7684Gradle\u4f9d\u8d56\u548c\u7f16\u8bd1\u5668\u63d2\u4ef6\u3002\u4f60\u4e0d\u9700\u8981\u624b\u52a8\u6dfb\u52a0\u4efb\u4f55\u4e1c\u897f\u3002<\/p>\n<h4>9.3 \u770b\u61c2\u81ea\u52a8\u751f\u6210\u7684\u4ee3\u7801<\/h4>\n<p>\u9879\u76ee\u521b\u5efa\u540e&#xff0c;\u6253\u5f00 MainActivity.kt&#xff0c;\u4f60\u4f1a\u770b\u5230\u7c7b\u4f3c\u8fd9\u6837\u7684\u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">class<\/span> MainActivity <span class=\"token operator\">:<\/span> <span class=\"token function\">ComponentActivity<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">override<\/span> <span class=\"token keyword\">fun<\/span> <span class=\"token function\">onCreate<\/span><span class=\"token punctuation\">(<\/span>savedInstanceState<span class=\"token operator\">:<\/span> Bundle<span class=\"token operator\">?<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">super<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">onCreate<\/span><span class=\"token punctuation\">(<\/span>savedInstanceState<span class=\"token punctuation\">)<\/span><br \/>\n        setContent <span class=\"token punctuation\">{<\/span><br \/>\n            MyAppTheme <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token function\">Scaffold<\/span><span class=\"token punctuation\">(<\/span>modifier <span class=\"token operator\">&#061;<\/span> 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> <span class=\"token punctuation\">{<\/span> innerPadding <span class=\"token operator\">-&gt;<\/span><br \/>\n                    <span class=\"token function\">Greeting<\/span><span class=\"token punctuation\">(<\/span><br \/>\n                        name <span class=\"token operator\">&#061;<\/span> <span class=\"token string-literal singleline\"><span class=\"token string\">&#034;Android&#034;<\/span><\/span><span class=\"token punctuation\">,<\/span><br \/>\n                        modifier <span class=\"token operator\">&#061;<\/span> Modifier<span class=\"token punctuation\">.<\/span><span class=\"token function\">padding<\/span><span class=\"token punctuation\">(<\/span>innerPadding<span class=\"token punctuation\">)<\/span><br \/>\n                    <span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token annotation builtin\">&#064;Composable<\/span><br \/>\n<span class=\"token keyword\">fun<\/span> <span class=\"token function\">Greeting<\/span><span class=\"token punctuation\">(<\/span>name<span class=\"token operator\">:<\/span> String<span class=\"token punctuation\">,<\/span> modifier<span class=\"token operator\">:<\/span> Modifier <span class=\"token operator\">&#061;<\/span> Modifier<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">Text<\/span><span class=\"token punctuation\">(<\/span><br \/>\n        text <span class=\"token operator\">&#061;<\/span> <span class=\"token string-literal singleline\"><span class=\"token string\">&#034;Hello <\/span><span class=\"token interpolation\"><span class=\"token interpolation-punctuation punctuation\">$<\/span><span class=\"token expression\">name<\/span><\/span><span class=\"token string\">!&#034;<\/span><\/span><span class=\"token punctuation\">,<\/span><br \/>\n        modifier <span class=\"token operator\">&#061;<\/span> modifier<br \/>\n    <span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token annotation builtin\">&#064;Preview<\/span><span class=\"token punctuation\">(<\/span>showBackground <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token annotation builtin\">&#064;Composable<\/span><br \/>\n<span class=\"token keyword\">fun<\/span> <span class=\"token function\">GreetingPreview<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    MyAppTheme <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">Greeting<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-literal singleline\"><span class=\"token string\">&#034;Android&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8fd9\u6bb5\u4ee3\u7801\u91cc\u6709\u51e0\u4e2a\u5173\u952e\u70b9\u503c\u5f97\u6ce8\u610f&#xff1a;<\/p>\n<p>setContent &#xff1a;\u8fd9\u662f\u4ece\u4f20\u7edfActivity\u4e16\u754c\u8fdb\u5165Compose\u4e16\u754c\u7684\u201c\u5165\u53e3\u201d\u3002\u5728 setContent \u7684lambda\u91cc&#xff0c;\u4f60\u5199\u7684\u4e00\u5207\u90fd\u662f\u53ef\u7ec4\u5408\u51fd\u6570\u3002<\/p>\n<p>Scaffold &#xff1a;\u63d0\u4f9b\u4e86\u4e00\u4e2aMaterial Design\u7684\u57fa\u672c\u9875\u9762\u7ed3\u6784\u3002innerPadding \u7528\u6765\u907f\u514d\u5185\u5bb9\u88ab\u72b6\u6001\u680f\u3001\u5bfc\u822a\u680f\u7b49\u7cfb\u7edfUI\u906e\u6321\u3002<\/p>\n<p>&#064;Preview &#xff1a;\u8fd9\u4e2a\u6ce8\u89e3\u8ba9 GreetingPreview \u51fd\u6570\u53ef\u4ee5\u5728Android Studio\u7684\u9884\u89c8\u9762\u677f\u4e2d\u6e32\u67d3\u51fa\u6765\u3002\u4f60\u4e0d\u9700\u8981\u628a\u5e94\u7528\u8dd1\u5230\u8bbe\u5907\u4e0a&#xff0c;\u5c31\u80fd\u770b\u5230 Greeting \u7ec4\u4ef6\u957f\u4ec0\u4e48\u6837\u3002\u8fd9\u662fCompose\u5f00\u53d1\u4e2d\u975e\u5e38\u9ad8\u9891\u4f7f\u7528\u7684\u529f\u80fd\u3002<\/p>\n<p>Modifier &#xff1a;\u4f60\u770b\u5230 Greeting \u51fd\u6570\u63a5\u6536\u4e86\u4e00\u4e2a modifier: Modifier &#061; Modifier \u53c2\u6570\u3002\u8fd9\u662fCompose\u7684\u60ef\u4f8b\u2014\u2014\u6bcf\u4e2a\u53ef\u7ec4\u5408\u51fd\u6570\u90fd\u5e94\u8be5\u63a5\u53d7\u4e00\u4e2a Modifier \u53c2\u6570&#xff0c;\u8fd9\u6837\u8c03\u7528\u8005\u53ef\u4ee5\u4ece\u5916\u90e8\u7ed9\u7ec4\u4ef6\u6dfb\u52a0\u5404\u79cd\u4fee\u9970&#xff08;\u5185\u8fb9\u8ddd\u3001\u5c3a\u5bf8\u3001\u70b9\u51fb\u4e8b\u4ef6\u7b49&#xff09;\u3002<\/p>\n<h4>9.4 \u6539\u4e00\u884c\u4ee3\u7801\u8bd5\u8bd5<\/h4>\n<p>\u628a Greeting \u91cc\u7684\u6587\u5b57\u6539\u6389&#xff1a;<\/p>\n<p><span class=\"token function\">Text<\/span><span class=\"token punctuation\">(<\/span>text <span class=\"token operator\">&#061;<\/span> <span class=\"token string-literal singleline\"><span class=\"token string\">&#034;\u4f60\u597d&#xff0c;Compose&#xff01;&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u4fdd\u5b58\u540e&#xff0c;\u9884\u89c8\u9762\u677f\u4f1a\u7acb\u523b\u66f4\u65b0\u3002\u8fd9\u5c31\u662fCompose\u5f00\u53d1\u6700\u65e5\u5e38\u7684\u8282\u594f&#xff1a;\u5199\u4ee3\u7801&#xff0c;\u770b\u9884\u89c8&#xff0c;\u6539\u4ee3\u7801&#xff0c;\u9884\u89c8\u66f4\u65b0\u3002\u4e0d\u9700\u8981\u7f16\u8bd1\u3001\u5b89\u88c5\u3001\u542f\u52a8\u5e94\u7528\u3002<\/p>\n<h3>\u5341\u3001Compose\u7684\u73b0\u72b6\u4e0e\u672a\u6765<\/h3>\n<h4>10.1 \u73b0\u72b6&#xff1a;Compose-first<\/h4>\n<p>2026\u5e74\u7684Android\u5f00\u53d1\u5df2\u7ecf\u8fdb\u5165 Compose-first \u65f6\u4ee3\u3002Google\u660e\u786e\u8868\u793a&#xff1a;<\/p>\n<ul>\n<li>\u65b0\u5de5\u5177\u53ea\u9762\u5411Compose&#xff1a;\u6240\u6709\u65b0\u7684Android Studio UI\u5de5\u5177\u90fd\u53ea\u4e3aCompose\u6784\u5efa\u3002<\/li>\n<li>\u6587\u6863\u548c\u6559\u7a0b\u4ee5Compose\u4e3a\u4e3b&#xff1a;\u5b98\u65b9\u7684\u6587\u6863\u3001codelab\u3001\u793a\u4f8b\u9879\u76ee\u90fd\u4f18\u5148\u56f4\u7ed5Compose\u5c55\u5f00\u3002<\/li>\n<li>View\u8fdb\u5165\u7ef4\u62a4\u6a21\u5f0f&#xff1a;\u4f20\u7edfView\u7ec4\u4ef6\u53ea\u4f1a\u6536\u5230\u5173\u952e\u4fee\u590d&#xff0c;\u4e0d\u4f1a\u6709\u65b0\u529f\u80fd\u3002<\/li>\n<\/ul>\n<p>\u4f46\u8fd9\u4e0d\u610f\u5473\u7740View\u4f1a\u7acb\u523b\u6d88\u5931\u3002Google\u4e5f\u627f\u8bfa\u4f1a\u5728\u4e00\u6bb5\u65f6\u95f4\u5185\u7ee7\u7eed\u652f\u6301\u4f20\u7edfView&#xff0c;\u5e76\u63d0\u4f9b\u4e92\u64cd\u4f5cAPI&#xff0c;\u8ba9\u5f00\u53d1\u8005\u53ef\u4ee5\u6309\u81ea\u5df1\u7684\u8282\u594f\u9010\u6b65\u8fc1\u79fb\u3002<\/p>\n<h4>10.2 \u8fc1\u79fb\u8def\u5f84&#xff1a;\u6e10\u8fdb\u5f0f\u91c7\u7528<\/h4>\n<p>\u5982\u679c\u4f60\u624b\u4e0a\u6709\u4e00\u4e2a\u57fa\u4e8eXML\u548cView\u7684\u73b0\u6709\u9879\u76ee&#xff0c;\u4e0d\u9700\u8981\u4e00\u6b21\u6027\u5168\u90e8\u91cd\u5199\u3002Compose\u652f\u6301\u4e0eView\u7684\u53cc\u5411\u4e92\u64cd\u4f5c&#xff1a;<\/p>\n<ul>\n<li>\u5728View\u4e2d\u4f7f\u7528Compose&#xff1a;\u53ef\u4ee5\u901a\u8fc7 ComposeView \u628aCompose\u754c\u9762\u5d4c\u5165\u5230XML\u5e03\u5c40\u4e2d\u3002<\/li>\n<li>\u5728Compose\u4e2d\u4f7f\u7528View&#xff1a;\u53ef\u4ee5\u901a\u8fc7 AndroidView \u53ef\u7ec4\u5408\u51fd\u6570\u628a\u4f20\u7edf\u7684View\u5d4c\u5165\u5230Compose\u754c\u9762\u4e2d\u3002<\/li>\n<\/ul>\n<p>\u63a8\u8350\u7684\u8fc1\u79fb\u7b56\u7565\u662f \u201cCompose Island\u201d &#xff1a;\u4ece\u65b0\u529f\u80fd\u6216\u8005\u67d0\u4e2a\u72ec\u7acb\u7684\u9875\u9762\u5f00\u59cb&#xff0c;\u7528Compose\u5b9e\u73b0&#xff0c;\u4f5c\u4e3a\u4e00\u4e2a\u201c\u5c9b\u5c7f\u201d\u5d4c\u5165\u5230\u73b0\u6709\u7684View\u4f53\u7cfb\u4e2d\u3002\u968f\u7740\u65f6\u95f4\u63a8\u79fb&#xff0c;\u5c9b\u5c7f\u8d8a\u6765\u8d8a\u591a&#xff0c;\u6700\u7ec8\u5b8c\u6210\u8fc1\u79fb\u3002<\/p>\n<h4>10.3 \u8def\u7ebf\u56fe\u4e0a\u7684\u4eae\u70b9<\/h4>\n<p>\u6839\u636eGoogle\u516c\u5e03\u7684Compose\u8def\u7ebf\u56fe&#xff0c;\u672a\u6765\u503c\u5f97\u5173\u6ce8\u7684\u65b9\u5411\u5305\u62ec&#xff1a;<\/p>\n<ul>\n<li>\u6027\u80fd\u6301\u7eed\u4f18\u5316&#xff1a;\u77e2\u91cf\u7f13\u5b58\u6539\u8fdb\u3001\u6a21\u7cca\u6548\u679c\u6539\u8fdb\u3001\u9ad8\u7ea7\u56fe\u5f62\u6548\u679c<\/li>\n<li>\u6587\u672c\u548c\u8f93\u5165\u589e\u5f3a&#xff1a;\u591a\u6837\u5f0f\u6587\u672c\u7f16\u8f91\u3001\u6587\u672c\u9009\u62e9API\u6539\u8fdb\u3001\u81ea\u9002\u5e94\u6587\u5b57\u5927\u5c0f<\/li>\n<li>\u52a8\u753b\u548c\u5bfc\u822a&#xff1a;\u66f4\u9ad8\u7ea7\u7684\u52a8\u753b\u652f\u6301\u3001\u5171\u4eab\u5143\u7d20\u8fc7\u6e21<\/li>\n<li>\u751f\u6210\u5f0fAI\u4e0eUI\u5f00\u53d1\u5b9e\u9a8c&#xff1a;\u5c06AI\u80fd\u529b\u878d\u5165UI\u5f00\u53d1\u6d41\u7a0b<\/li>\n<\/ul>\n<h4>10.4 \u73b0\u5728\u5c31\u662f\u5b66\u4e60Compose\u7684\u6700\u4f73\u65f6\u673a<\/h4>\n<p>\u5982\u679c\u4f60\u8fd8\u5728\u72b9\u8c6b\u201c\u8981\u4e0d\u8981\u5b66Compose\u201d&#xff0c;\u7b54\u6848\u5df2\u7ecf\u5f88\u6e05\u695a\u4e86&#xff1a;\u8981\u3002<\/p>\n<p>\u4e0d\u662f\u56e0\u4e3aCompose\u201c\u65b0\u201d&#xff0c;\u800c\u662f\u56e0\u4e3a\u5b83\u5df2\u7ecf\u662fAndroid UI\u5f00\u53d1\u7684\u4e3b\u6d41\u65b9\u5411\u3002\u65b0\u9879\u76ee\u9ed8\u8ba4\u7528Compose&#xff0c;\u65b0\u5de5\u5177\u4f18\u5148\u652f\u6301Compose&#xff0c;\u65b0\u6587\u6863\u56f4\u7ed5Compose\u7f16\u5199\u3002\u7ee7\u7eed\u53ea\u7528\u4f20\u7edfView\u4f53\u7cfb&#xff0c;\u610f\u5473\u7740\u4f60\u5728\u4f7f\u7528\u4e00\u4e2a\u5904\u4e8e\u7ef4\u62a4\u6a21\u5f0f\u7684\u6280\u672f\u6808\u3002<\/p>\n<p>\u800c\u4e14&#xff0c;\u5b66Compose\u7684\u95e8\u69db\u5e76\u4e0d\u9ad8\u3002\u5b83\u7528Kotlin&#xff0c;\u8fd9\u662f\u5927\u591a\u6570Android\u5f00\u53d1\u8005\u5df2\u7ecf\u719f\u6089\u7684\u8bed\u8a00\u3002\u5b83\u7684\u6838\u5fc3\u6982\u5ff5\u2014\u2014\u53ef\u7ec4\u5408\u51fd\u6570\u3001\u72b6\u6001\u3001\u91cd\u7ec4\u2014\u2014\u6570\u91cf\u4e0d\u591a&#xff0c;\u800c\u4e14\u903b\u8f91\u81ea\u6d3d\u3002\u4e00\u65e6\u7406\u89e3\u4e86\u201c\u58f0\u660e\u5f0f\u601d\u7ef4\u201d&#xff0c;\u540e\u9762\u7684\u8def\u4f1a\u8d8a\u6765\u8d8a\u987a\u3002<\/p>\n<h3>\u5341\u4e00\u3001\u672c\u8bfe\u5c0f\u7ed3<\/h3>\n<p>\u8fd9\u4e00\u8bfe\u6211\u4eec\u804a\u4e86\u8fd9\u4e9b\u95ee\u9898&#xff1a;<\/p>\n<ul>\n<li>\u4e3a\u4ec0\u4e48\u9700\u8981Compose&#xff1a;\u4f20\u7edf\u547d\u4ee4\u5f0fUI\u5728\u590d\u6742\u754c\u9762\u4e0b\u7684\u7ef4\u62a4\u6210\u672c\u8d8a\u6765\u8d8a\u9ad8&#xff0c;\u58f0\u660e\u5f0fUI\u662f\u884c\u4e1a\u7684\u6f14\u8fdb\u65b9\u5411\u3002<\/li>\n<li>Compose\u662f\u4ec0\u4e48&#xff1a;\u4e00\u4e2a\u58f0\u660e\u5f0f\u7684\u3001\u57fa\u4e8eKotlin\u7684UI\u5de5\u5177\u5305&#xff0c;\u4f60\u63cf\u8ff0\u201c\u754c\u9762\u5e94\u8be5\u662f\u4ec0\u4e48\u6837\u201d&#xff0c;\u6846\u67b6\u8d1f\u8d23\u201c\u600e\u4e48\u53d8\u6210\u8fd9\u6837\u201d\u3002<\/li>\n<li>\u53ef\u7ec4\u5408\u51fd\u6570&#xff1a;Compose\u7684\u57fa\u672c\u6784\u5efa\u5355\u5143&#xff0c;\u7528 &#064;Composable \u6ce8\u89e3\u6807\u8bb0\u7684\u666e\u901a\u51fd\u6570&#xff0c;\u63a5\u6536\u6570\u636e\u3001\u53d1\u5c04UI\u3002<\/li>\n<li>\u67b6\u6784\u5206\u5c42&#xff1a;Runtime \u2192 UI \u2192 Foundation \u2192 Material&#xff0c;\u4ece\u5e95\u5c42\u673a\u5236\u5230\u4e0a\u5c42\u7ec4\u4ef6&#xff0c;\u6bcf\u4e00\u5c42\u90fd\u53ef\u4ee5\u72ec\u7acb\u4f7f\u7528\u3002<\/li>\n<li>\u72b6\u6001\u7ba1\u7406&#xff1a;mutableStateOf \u521b\u5efa\u53ef\u89c2\u5bdf\u72b6\u6001&#xff0c;remember \u5728\u91cd\u7ec4\u95f4\u4fdd\u7559\u72b6\u6001&#xff0c;\u72b6\u6001\u63d0\u5347\u8ba9\u72b6\u6001\u5728\u7ec4\u4ef6\u6811\u4e2d\u6d41\u52a8\u3002<\/li>\n<li>\u73af\u5883\u642d\u5efa&#xff1a;\u7528Android Studio\u521b\u5efaEmpty Activity\u9879\u76ee&#xff0c;&#064;Preview \u53ef\u4ee5\u5b9e\u65f6\u9884\u89c8&#xff0c;Modifier 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