{"id":42332,"date":"2023-12-11T14:56:14","date_gmt":"2023-12-11T06:56:14","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=42332"},"modified":"2023-12-11T14:56:14","modified_gmt":"2023-12-11T06:56:14","slug":"android-fragment%e4%b9%8b%e9%97%b4%e4%bc%a0%e9%80%92%e6%95%b0%e6%8d%ae%e7%9a%84%e6%96%b9%e5%bc%8f%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/11\/android-fragment%e4%b9%8b%e9%97%b4%e4%bc%a0%e9%80%92%e6%95%b0%e6%8d%ae%e7%9a%84%e6%96%b9%e5%bc%8f%ef%bc%9f\/","title":{"rendered":"Android fragment\u4e4b\u95f4\u4f20\u9012\u6570\u636e\u7684\u65b9\u5f0f\uff1f"},"content":{"rendered":"<p>&#8220;`&#8221;                    \u65b9\u6cd5\u4e00\uff1a<\/p>\n<p>1\u3001\u5728MainFragment\u4e2d\u8bbe\u7f6e\u4e00\u4e2asetData()\u65b9\u6cd5\uff0c\u5728\u65b9\u6cd5\u4e2d\u8bbe\u7f6e\u66f4\u6539\u6309\u94ae\u540d\u79f0;<br \/>\n\/\/MainFragment.java\u6587\u4ef6\u4e2d<\/p>\n<pre><code>public void setData(String string) {\n\nbt_main.setText(string);\n\n}\n<\/code><\/pre>\n<p>2\u3001\u5728MenuFragment\u4e2d\u7684ListView\u6761\u76ee\u70b9\u51fb\u4e8b\u4ef6\u4e2d\u901a\u8fc7\u6807\u7b7e\u83b7\u53d6\u5230MainFragment\uff0c\u5e76\u8c03\u7528\u5bf9\u5e94\u7684setData()\u65b9\u6cd5\uff0c\u5c06\u6570\u636e\u8bbe\u7f6e\u8fdb\u53bb\uff0c\u4ece\u800c\u8fbe\u5230\u6570\u636e\u4f20\u9012\u7684\u76ee\u7684\u3002<\/p>\n<pre><code>lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {\n\n@Override\n\npublic void onItemClick(AdapterView&lt;?&gt; parent, View view, int position, long id) {\n\nMainFragment mainFragment =\n\n(MainFragment) getActivity()\n\n.getSupportFragmentManager()\n\n.findFragmentByTag(\"\"mainFragment\"\");\n\nmainFragment.setData(mDatas.get(position));\n\n}\n\n});\n<\/code><\/pre>\n<p>\u53ea\u9700\u4e0a\u9762\u533a\u533a\u4e24\u6b65\u5373\u53ef\u8fbe\u5230\u6570\u636e\u4f20\u9012\u7684\u76ee\u7684\u3002<br \/>\n\u65b9\u6cd5\u4e8c\uff1a<br \/>\n\u91c7\u53d6\u63a5\u53e3\u56de\u8c03\u7684\u65b9\u5f0f\u8fdb\u884c\u6570\u636e\u4f20\u9012\u3002<\/p>\n<p>step1: \u5728Menuragment\u4e2d\u521b\u5efa\u4e00\u4e2a\u63a5\u53e3\u4ee5\u53ca\u63a5\u53e3\u5bf9\u5e94\u7684set\u65b9\u6cd5\uff1a<\/p>\n<pre><code>\/\/MenuFragment.java\u6587\u4ef6\u4e2d\npublic interface OnDataTransmissionListener {\n    public void dataTransmission(String data);\n}\n\npublic void setOnDataTransmissionListener(OnDataTransmissionListener mListener) {\n    this.mListener = mListener;\n}\n<\/code><\/pre>\n<p>step2: \u5728MenuFragment\u4e2d\u7684ListView\u6761\u76ee\u70b9\u51fb\u4e8b\u4ef6\u4e2d\u8fdb\u884c\u63a5\u53e3\u8fdb\u884c\u63a5\u53e3\u56de\u8c03<\/p>\n<pre><code>\/\/MenuFragment.java\u6587\u4ef6\u4e2d\nlv.setOnItemClickListener(new AdapterView.OnItemClickListener() {\n@Override\npublic void onItemClick(AdapterView&lt;?&gt; parent, View view, int position, long id) {\n\n\n<\/code><\/pre>\n<p>&nbsp;<\/p>\n<ul>\n<li>\u65b9\u6cd5\u4e8c\uff1a\u91c7\u53d6\u63a5\u53e3\u56de\u8c03\u7684\u65b9\u5f0f\u8fdb\u884c\u6570\u636e\u4f20\u9012<\/li>\n<\/ul>\n<pre><code>if (mListener != null) {\n    mListener.dataTransmission(mDatas.get(position));\n});\n<\/code><\/pre>\n<p>step3: \u5728MainActivity\u4e2d\u6839\u636emenuFragment\u83b7\u53d6\u5230\u63a5\u53e3\u7684set\u65b9\u6cd5\uff0c\u5728\u8fd9\u4e2a\u65b9\u6cd5\u4e2d\u8fdb\u884c\u8fdb\u884c\u6570\u636e\u4f20\u9012\uff0c\u5177\u4f53\u5982\u4e0b\uff1a<\/p>\n<pre><code>\/\/\u5728MainActivity.java\u4e2d\nmenuFragment.setOnDataTransmissionListener(new MenuFragment.OnDataTransmissionListener() {\n    @Override\n    public void dataTransmission(String data) {\n         mainFragment.setData(data); \/\/\u6ce8\uff1a\u5bf9\u5e94\u7684mainFragment\u6b64\u65f6\u5e94\u8be5\u8981\u7528final\u8fdb\u884c\u4fee\u9970\n    }\n});\n<\/code><\/pre>\n<p>\u901a\u8fc7\u4e0a\u9762\u7684\u4e09\u6b65\u4e5f\u53ef\u4ee5\u8f7b\u677e\u505a\u5230Fragment\u6570\u636e\u4e4b\u95f4\u7684\u4f20\u9012\u3002<br \/>\n\u65b9\u6cd5\u4e09\uff1a<br \/>\n\u4f7f\u7528\u4e09\u65b9\u5f00\u6e90\u6846\u67b6\uff1aEventBus<br \/>\n\u90a3\u4e48\u95ee\u9898\u6765\u4e86\uff1aEventBus\u662f\u4e2a\u5565\u4e1c\u897f\uff1f\uff1f\uff1f<br \/>\n\u7b80\u5355\u6765\u8bf4\uff0cEventBus\u662f\u4e00\u6b3e\u9488\u5bf9Android\u4f18\u5316\u7684\u53d1\u5e03\/\u8ba2\u9605\uff08publish\/subscribe\uff09\u4e8b\u4ef6\u603b\u7ebf\u3002\u4e3b\u8981\u529f\u80fd\u662f\u66ff\u4ee3Intent,Handler,BroadCast\u5728Fragment\uff0cActivity\uff0cService\uff0c\u7ebf\u7a0b\u4e4b\u95f4\u4f20\u9012\u6d88\u606f\u3002\u7b80\u5316\u4e86\u5e94\u7528\u7a0b\u5e8f\u5185\u5404\u7ec4\u4ef6\u95f4\u3001\u7ec4\u4ef6\u4e0e\u540e\u53f0\u7ebf\u7a0b\u95f4\u7684\u901a\u4fe1\u3002\u4f18\u70b9\u662f\u5f00\u9500\u5c0f\uff0c\u4ee3\u7801\u66f4\u4f18\u96c5\uff0c\u4ee5\u53ca\u5c06\u53d1\u9001\u8005\u548c\u63a5\u6536\u8005\u89e3\u8026\u3002\u6bd4\u5982\u8bf7\u6c42\u7f51\u7edc\uff0c\u7b49\u7f51\u7edc\u8fd4\u56de\u65f6\u901a\u8fc7Handler\u6216Broadcast\u901a\u77e5UI\uff0c\u4e24\u4e2aFragment\u4e4b\u95f4\u9700\u8981\u901a\u8fc7Listener\u901a\u4fe1\uff0c\u8fd9\u4e9b\u9700\u6c42\u90fd\u53ef\u4ee5\u901a\u8fc7EventBus\u5b9e\u73b0\u3002<br \/>\n\u4e0b\u9762\u6211\u4eec\u5c31\u7528EventBus\u6765\u5b9e\u73b0\u4ee5\u4e0bFragment\u4e4b\u95f4\u7684\u6570\u636e\u4f20\u9012\uff1a<\/p>\n<p>step1\uff1a\u5f15\u5165EventBus<br \/>\ncompile &#8216;org.greenrobot:eventbus:3.0.0&#8217;<br \/>\nstep2\uff1a\u6ce8\u518c\u4e8b\u4ef6\u63a5\u6536\u8005<br \/>\n\u8fd9\u91ccMainFragment\u662f\u8981\u63a5\u6536MenuFragment\u53d1\u9001\u6765\u7684\u6570\u636e\uff0c\u6240\u4ee5\u6211\u4eec\u5728MainFragment\u4e2d\u7684onCreateView()\u65b9\u6cd5\u4e2d\u8fdb\u884c\u6ce8\u518c\uff1a<br \/>\nEventBus.getDefault().register(this);<br \/>\nstep3\uff1a\u53d1\u9001\u4e8b\u4ef6<br \/>\n\u6ce8\uff1a\u53d1\u9001\u4e8b\u4ef6\u4e4b\u524d\u5176\u5b9e\u8fd8\u6709\u4e00\u6b65\u5b9a\u4e49\u4e8b\u4ef6\u7c7b\u578b\uff0c\u8fd9\u91cc\u6211\u4eec\u4f20\u9012\u7684\u6570\u636e\u53ea\u6709\u4e00\u4e2a\u7c7b\u578b\uff0c\u6240\u4ee5\u8fd9\u4e00\u6b65\u53d6\u6d88\u4e86\u3002<br \/>\nMenuFragment\u53d1\u9001\u6570\u636e\u7ed9MainFragment\uff0c\u6240\u4ee5\u6211\u4eec\u5728MenuFragment\u4e2d\u5c06\u8981\u4f20\u9012\u7684\u6570\u636e\u8fdb\u884c\u53d1\u9001\u4e8b\u4ef6\u64cd\u4f5c\uff1a<\/p>\n<pre><code>lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {\n    @Override\n\n    public void onItemClick(AdapterView&lt;?&gt; parent, View view, int position, long id) {\n\n    EventBus.getDefault().post(mDatas.get(position));\n}\n});\n<\/code><\/pre>\n<p>step4\uff1a\u63a5\u6536\u6d88\u606f\u5e76\u5904\u7406<br \/>\n\u5728MainFragment\u4e2d\u6211\u4eec\u63a5\u6536\u6765\u81eaMenuFragment\u4f20\u9012\u8fc7\u6765\u7684\u6570\u636e,\u5e76\u8fdb\u884c\u5bf9\u5e94\u7684\u5904\u7406\uff08\u6ce8\uff1aEventBus 3.0\u7248\u672c\u8fd9\u4e00\u6b65\u5fc5\u987b\u8981\u5199\u6ce8\u89e3@Subscribe (\u4e0e2.4\u7248\u672c\u6709\u6240\u533a\u522b)\uff09\uff1a<\/p>\n<pre><code>@Subscribe\npublic void onEvent(String data) {\n    bt_main.setText(data);\n}\n<\/code><\/pre>\n<p>\u901a\u8fc7\u4e0a\u9762\u8fd9\u4e00\u6b65\u5373\u53ef\u5b8c\u6210\u6570\u636e\u4e4b\u95f4\u7684\u4f20\u9012\uff0c\u9700\u8981\u6ce8\u610f\u7684\u662f\u5728\u9500\u6bc1\u7684\u65f6\u5019\u6211\u4eec\u8981\u6ce8\u9500\u4e8b\u4ef6\u63a5\u6536\u3002<br \/>\nstep5\uff1a\u6ce8\u9500\u4e8b\u4ef6\u63a5\u6536<\/p>\n<pre><code>\/\/MainFragment.java\u4e2d\n@Override\npublic void onDestroy() {\n    super.onDestroy();\n    EventBus.getDefault().unregister(this);\n}\n<\/code><\/pre>\n<p>\u4ee5\u4e0a\u4e94\u6b65\u5b8c\u6210\u4e86Fragment\u4e4b\u95f4\u7684\u6570\u636e\u4f20\u9012\uff0c\u770b\u4f3c\u6bd4\u4e0a\u9762\u4e24\u4e2a\u65b9\u6cd5\u8981\u590d\u6742\u7684\u591a\uff0c\u4f46\u5f53\u6211\u4eec\u6d89\u53ca\u5230\u590d\u6742\u7684Fragment\u4e4b\u95f4\u6570\u636e\u4f20\u9012\uff08\u4f8b\u5982Fragment\u4e2d\u5d4c\u5957\u591a\u5c42Fragment\uff09\u65f6\uff0c\u5c31\u4f1a\u4f53\u4f1a\u5230EventBus\u7684\u723d\u5feb\u4e4b\u5904~~~\u8fd9\u91cc\u4e0d\u8fdb\u884c\u8d58\u8ff0\u4e86\u3002<\/p>\n<pre><code>            \"```\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>&#8220;`&#8221; \u65b9\u6cd5\u4e00\uff1a 1\u3001\u5728MainFragment\u4e2d\u8bbe\u7f6e\u4e00\u4e2asetData()\u65b9\u6cd5\uff0c\u5728\u65b9 [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-42332","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/42332","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=42332"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/42332\/revisions"}],"predecessor-version":[{"id":42333,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/42332\/revisions\/42333"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=42332"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=42332"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=42332"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}