{"id":65141,"date":"2025-05-03T14:59:48","date_gmt":"2025-05-03T06:59:48","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65141\/"},"modified":"2025-05-03T14:59:48","modified_gmt":"2025-05-03T06:59:48","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8fragment%e4%b8%ad%e8%b0%83%e7%94%a8activity%e6%96%b9%e6%b3%95%ef%bc%9a%e5%88%a9%e7%94%a8viewmodel%e5%ae%9e%e7%8e%b0%e8%b7%a8%e7%bb%84%e4%bb%b6%e9%80%9a%e4%bf%a1%ef%bc%9f-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/65141\/","title":{"rendered":"\u5982\u4f55\u5728Fragment\u4e2d\u8c03\u7528Activity\u65b9\u6cd5\uff1a\u5229\u7528ViewModel\u5b9e\u73b0\u8de8\u7ec4\u4ef6\u901a\u4fe1\uff1f"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/246\/273\/173121570472233.jpg\" class=\"aligncenter\" title=\"\u5982\u4f55\u5728Fragment\u4e2d\u8c03\u7528Activity\u65b9\u6cd5\uff1a\u5229\u7528ViewModel\u5b9e\u73b0\u8de8\u7ec4\u4ef6\u901a\u4fe1\uff1f\u63d2\u56fe\" alt=\"\u5982\u4f55\u5728Fragment\u4e2d\u8c03\u7528Activity\u65b9\u6cd5\uff1a\u5229\u7528ViewModel\u5b9e\u73b0\u8de8\u7ec4\u4ef6\u901a\u4fe1\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5728fragment\u4e2d\u8c03\u7528activity\u65b9\u6cd5\uff1a\u5229\u7528viewmodel<\/strong><\/p>\n<p>android\u5f00\u53d1\u4e2d\uff0cfragment\u5728\u548cactivity\u4ea4\u4e92\u65f6\uff0c\u8c03\u7528activity\u4e2d\u7684\u65b9\u6cd5\u662f\u5e38\u89c1\u9700\u6c42\u3002\u5728\u8fd9\u65b9\u9762\uff0c\u4f7f\u7528viewmodel\u662f\u4e00\u4e2a\u503c\u5f97\u8003\u8651\u7684\u65b9\u5f0f\u3002<\/p>\n<p>viewmodel\u662f\u4e00\u79cd\u7279\u6b8a\u7c7b\u578b\u7684android\u7ec4\u4ef6\uff0c\u5f53fragment\u548cactivity\u5173\u8054\u65f6\uff0c\u5b83\u4eec\u53ef\u4ee5\u5171\u4eab\u540c\u4e00\u4e2aviewmodel\u3002\u8fd9\u6837\uff0cfragment\u548cactivity\u53ef\u4ee5\u901a\u8fc7viewmodel\u95f4\u63a5\u5730\u901a\u4fe1\uff0c\u800c\u4e0d\u9700\u8981\u76f4\u63a5\u76f8\u4e92\u8c03\u7528\u65b9\u6cd5\u3002<\/p>\n<p>viewmodel\u7684\u4e00\u4e2a\u5173\u952e\u7279\u6027\u662f\uff0c\u5b83\u4f1a\u968f\u751f\u547d\u5468\u671f\u800c\u81ea\u52a8\u6301\u4e45\u5316\u3002\u8fd9\u610f\u5473\u7740fragment\u548cactivity\u5728\u91cd\u65b0\u521b\u5efa\u6216\u914d\u7f6e\u66f4\u6539\u540e\uff0c\u4ecd\u7136\u53ef\u4ee5\u8bbf\u95ee\u76f8\u540c\u7684viewmodel\u5b9e\u4f8b\u3002\u8fd9\u975e\u5e38\u9002\u5408\u7ba1\u7406\u6570\u636e\u6216\u72b6\u6001\uff0c\u56e0\u4e3a\u53ef\u4ee5\u907f\u514d\u5728fragment\u548cactivity\u4e4b\u95f4\u91cd\u590d\u4f20\u9012\u6570\u636e\u3002<\/p>\n<p><strong>\u5982\u4f55\u4f7f\u7528viewmodel<\/strong><\/p>\n<ol>\n<li> <strong>\u521b\u5efaviewmodel\uff1a<\/strong>\u5728fragment\u6216activity\u4e2d\u521b\u5efaviewmodel\u7c7b\u3002\u5982\u679c\u60a8\u4f7f\u7528kotlin\uff0c\u53ef\u4ee5\u4f7f\u7528viewmodel()\u65b9\u6cd5\u6765\u5b9e\u4f8b\u5316viewmodel\u3002<\/li>\n<li> <strong>\u5c06viewmodel\u4e0efragment\u5173\u8054\uff1a<\/strong>\u5728fragment\u7684onviewcreated()\u6216oncreateview()\u65b9\u6cd5\u4e2d\uff0c\u5c06viewmodel\u4e0efragment\u5173\u8054\u3002\u8fd9\u6837\uff0c\u60a8\u53ef\u4ee5\u5728fragment\u4e2d\u4f7f\u7528viewmodel\u5c5e\u6027\u8bbf\u95eeviewmodel\u3002<\/li>\n<li> <strong>\u5728viewmodel\u4e2d\u5b9a\u4e49\u65b9\u6cd5\uff1a<\/strong>\u5728viewmodel\u7c7b\u4e2d\u5b9a\u4e49\u9700\u8981\u5728fragment\u4e2d\u8c03\u7528\u7684\u65b9\u6cd5\u3002\u8bf7\u8bb0\u4f4f\uff0c\u8fd9\u4e9b\u65b9\u6cd5\u5e94\u8be5\u53ea\u5305\u542b\u4e1a\u52a1\u903b\u8f91\uff0c\u800c\u4e0d\u6d89\u53caui\u64cd\u4f5c\u3002<\/li>\n<li> <strong>\u4ecefragment\u8c03\u7528\u65b9\u6cd5\uff1a<\/strong>\u5728\u9700\u8981\u4ecefragment\u4e2d\u8c03\u7528activity\u65b9\u6cd5\u65f6\uff0c\u53ef\u4ee5\u901a\u8fc7viewmodel\u5c5e\u6027\u8bbf\u95eeviewmodel\uff0c\u7136\u540e\u8c03\u7528\u6240\u9700\u7684viewmodel\u65b9\u6cd5\u3002<\/li>\n<\/ol>\n<p>\u4f8b\u5982\uff0c\u5047\u8bbe\u60a8\u6709\u4e00\u4e2a\u540d\u4e3amnactivity\u7684activity\uff0c\u5176\u4e2d\u6709\u4e00\u4e2a\u540d\u4e3adosomething()\u7684\u65b9\u6cd5\u3002\u8981\u4ecefragment\u4e2d\u8c03\u7528dosomething()\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u8fdb\u884c\uff1a<\/p>\n<p><strong>mainactivity.kt\uff08activity\uff09\uff1a<\/strong><\/p>\n<pre>class mainactivity : appcompatactivity() {\n\n    private val viewmodel = myviewmodel()\n\n    fun dosomething() {\n        \/\/ activity\u7684\u4e1a\u52a1\u903b\u8f91\n    }\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>myfragment.kt\uff08fragment\uff09\uff1a<\/strong><\/p>\n<pre>class MyFragment : Fragment() {\n\n    private val viewModel: MyViewModel by viewModel()\n\n    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {\n        super.onViewCreated(view, savedInstanceState)\n\n        \/\/ \u4eceViewModel\u4e2d\u8c03\u7528Activity\u7684\u65b9\u6cd5\n        viewModel.doSomething()\n    }\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8fd9\u79cd\u65b9\u5f0f\u7684\u597d\u5904\u662f\uff0cviewmodel\u89e3\u8026\u4e86fragment\u548cactivity\u4e4b\u95f4\u7684\u901a\u4fe1\uff0c\u907f\u514d\u4e86\u6f5c\u5728\u7684\u5185\u5b58\u6cc4\u6f0f\u548c\u5176\u4ed6\u95ee\u9898\u3002\u5b83\u8fd8\u53ef\u4ee5\u786e\u4fdd\u6570\u636e\u548c\u72b6\u6001\u5728fragment\u548cactivity\u4e4b\u95f4\u4e00\u81f4\uff0c\u5373\u4f7f\u5b83\u4eec\u91cd\u65b0\u521b\u5efa\u6216\u914d\u7f6e\u66f4\u6539\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u5982\u4f55\u5728Fragment\u4e2d\u8c03\u7528Activity\u65b9\u6cd5\uff1a\u5229\u7528ViewModel\u5b9e\u73b0\u8de8\u7ec4\u4ef6\u901a\u4fe1\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728fragment\u4e2d\u8c03\u7528activity\u65b9\u6cd5\uff1a\u5229\u7528viewmodel android\u5f00\u53d1\u4e2d\uff0cfragment\u5728\u548cactivity\u4ea4\u4e92\u65f6\uff0c\u8c03\u7528activity\u4e2d\u7684\u65b9\u6cd5\u662f\u5e38\u89c1\u9700\u6c42\u3002\u5728\u8fd9\u65b9\u9762\uff0c\u4f7f\u7528viewmodel\u662f\u4e00\u4e2a\u503c\u5f97\u8003\u8651\u7684\u65b9\u5f0f\u3002 viewmodel\u662f\u4e00\u79cd\u7279\u6b8a\u7c7b\u578b\u7684android\u7ec4\u4ef6\uff0c\u5f53fragment\u548cactivity\u5173\u8054\u65f6\uff0c\u5b83\u4eec\u53ef\u4ee5\u5171\u4eab\u540c\u4e00\u4e2aviewmodel\u3002\u8fd9\u6837\uff0cfragment\u548cactivity\u53ef\u4ee5\u901a\u8fc7viewmodel\u95f4\u63a5\u5730\u901a\u4fe1\uff0c\u800c\u4e0d\u9700\u8981\u76f4\u63a5\u76f8\u4e92\u8c03\u7528\u65b9\u6cd5\u3002 viewmodel\u7684\u4e00\u4e2a\u5173\u952e\u7279\u6027\u662f\uff0c\u5b83\u4f1a\u968f\u751f\u547d\u5468\u671f\u800c\u81ea\u52a8\u6301\u4e45\u5316\u3002\u8fd9\u610f\u5473\u7740fragment\u548cactivity\u5728\u91cd\u65b0\u521b\u5efa\u6216\u914d\u7f6e\u66f4\u6539\u540e\uff0c\u4ecd\u7136\u53ef\u4ee5\u8bbf\u95ee\u76f8\u540c\u7684viewmodel\u5b9e\u4f8b\u3002\u8fd9\u975e\u5e38\u9002\u5408\u7ba1\u7406\u6570\u636e\u6216\u72b6\u6001\uff0c\u56e0\u4e3a\u53ef\u4ee5\u907f\u514d\u5728fragment\u548cactivity\u4e4b\u95f4\u91cd\u590d\u4f20\u9012\u6570\u636e\u3002 \u5982\u4f55\u4f7f\u7528viewmodel \u521b\u5efaviewmodel\uff1a\u5728fragment\u6216activity\u4e2d\u521b\u5efaviewmodel\u7c7b\u3002\u5982\u679c\u60a8\u4f7f\u7528kotlin\uff0c\u53ef\u4ee5\u4f7f\u7528viewmodel()\u65b9\u6cd5\u6765\u5b9e\u4f8b\u5316viewmodel\u3002 \u5c06viewmodel\u4e0efragment\u5173\u8054\uff1a\u5728fragment\u7684onviewcreated()\u6216oncreateview()\u65b9\u6cd5\u4e2d\uff0c\u5c06viewmodel\u4e0efragment\u5173\u8054\u3002\u8fd9\u6837\uff0c\u60a8\u53ef\u4ee5\u5728fragment\u4e2d\u4f7f\u7528viewmodel\u5c5e\u6027\u8bbf\u95eeviewmodel\u3002 \u5728viewmodel\u4e2d\u5b9a\u4e49\u65b9\u6cd5\uff1a\u5728viewmodel\u7c7b\u4e2d\u5b9a\u4e49\u9700\u8981\u5728fragment\u4e2d\u8c03\u7528\u7684\u65b9\u6cd5\u3002\u8bf7\u8bb0\u4f4f\uff0c\u8fd9\u4e9b\u65b9\u6cd5\u5e94\u8be5\u53ea\u5305\u542b\u4e1a\u52a1\u903b\u8f91\uff0c\u800c\u4e0d\u6d89\u53caui\u64cd\u4f5c\u3002 \u4ecefragment\u8c03\u7528\u65b9\u6cd5\uff1a\u5728\u9700\u8981\u4ecefragment\u4e2d\u8c03\u7528activity\u65b9\u6cd5\u65f6\uff0c\u53ef\u4ee5\u901a\u8fc7viewmodel\u5c5e\u6027\u8bbf\u95eeviewmodel\uff0c\u7136\u540e\u8c03\u7528\u6240\u9700\u7684viewmodel\u65b9\u6cd5\u3002 \u4f8b\u5982\uff0c\u5047\u8bbe\u60a8\u6709\u4e00\u4e2a\u540d\u4e3amnactivity\u7684activity\uff0c\u5176\u4e2d\u6709\u4e00\u4e2a\u540d\u4e3adosomething()\u7684\u65b9\u6cd5\u3002\u8981\u4ecefragment\u4e2d\u8c03\u7528dosomething()\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u8fdb\u884c\uff1a mainactivity.kt\uff08activity\uff09\uff1a class mainactivity : appcompatactivity() { private val viewmodel = myviewmodel() fun dosomething() { \/\/ activity\u7684\u4e1a\u52a1\u903b\u8f91 } } \u767b\u5f55\u540e\u590d\u5236 myfragment.kt\uff08fragment\uff09\uff1a class MyFragment : Fragment() { private val viewModel: MyViewModel by viewModel() override fun onViewCreated(view: View, savedInstanceState: Bundle?) { super.onViewCreated(view, savedInstanceState) \/\/ \u4eceViewModel\u4e2d\u8c03\u7528Activity\u7684\u65b9\u6cd5 viewModel.doSomething() } } [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-65141","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65141","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=65141"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65141\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=65141"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=65141"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=65141"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}