{"id":2012,"date":"2015-02-06T17:57:06","date_gmt":"2015-02-06T09:57:06","guid":{"rendered":"http:\/\/blog.qdac.cc\/?p=2012"},"modified":"2015-02-06T17:57:06","modified_gmt":"2015-02-06T09:57:06","slug":"fmx-%e7%97%9b%e8%8b%a6%e7%9a%84%e5%85%88%e9%a9%b1-android-%e4%b8%8b%e9%83%a8%e5%88%86%e6%8c%89%e9%94%ae%e4%b8%8d%e4%bc%9a%e8%a7%a6%e5%8f%91-keydown-%e4%ba%8b%e4%bb%b6%e7%9a%84%e5%a4%84%e7%90%86","status":"publish","type":"post","link":"https:\/\/blog.qdac.cc\/?p=2012","title":{"rendered":"[FMX] \u75db\u82e6\u7684\u5148\u9a71 &#8211; Android \u4e0b\u90e8\u5206\u6309\u952e\u4e0d\u4f1a\u89e6\u53d1 KeyDown \u4e8b\u4ef6\u7684\u5904\u7406"},"content":{"rendered":"<p>\u505a\u5148\u9a71\u662f\u75db\u82e6\u7684\uff0c\u6b7b\u7684\u58ee\u70c8\uff0c\u6d3b\u7684\u618b\u5c48\u3002\u9047\u5230\u95ee\u9898\uff0c\u5728\u8c37\u54e5\u548c\u5ea6\u5a18\u90fd\u5e2e\u4e0d\u4e0a\u5fd9\u7684\u60c5\u51b5\u4e0b\uff0c\u53ea\u597d\u81ea\u5df1\u6478\u7d22\u3002\u76f8\u4fe1\u5728\u9ed1\u6697\u4e2d\uff0c\u603b\u6709\u90a3\u4e48\u4e00\u9053\u5149\u95ea\u8fc7\u667a\u6167\u7684\u8111\u888b\u74dc\u5b50~~~~<\/p>\n<p>\u524d\u60c5\u63d0\u8981\uff1a\u56e0\u4e3a\u8bd5\u56fe\u8981\u5728\u7a97\u4f53\u7684 OnKeyDown \u4e8b\u4ef6\u4e2d\u54cd\u5e94\u7ea2\u5916\u9065\u63a7\u5668\u4e0a\u7684 OK \u786e\u8ba4\u952e\uff0c\u7ed3\u679c\u5374\u75db\u82e6\u7684\u53d1\u73b0\uff0c\u76f8\u5e94\u7684\u4e8b\u4ef6\u4e0d\u4f1a\u88ab\u89e6\u53d1\uff0c\u4e8e\u662f\u75db\u82e6\u7684\u6478\u7d22\u8fc7\u7a0b\u5f00\u59cb\u4e86\u2026\u2026<\/p>\n<p>\uff08\u6b64\u5904\u7701\u75655000\u5b57\uff09<\/p>\n<p>\u597d\u4e86\uff0c\u73b0\u5728\u544a\u8bc9\u5927\u5bb6\u7ed3\u679c\uff0c\u4ffa\u641e\u5b9a\u4e86\uff01<\/p>\n<p>\u9996\u5148\u8bf4\u95ee\u9898\u7684\u6839\u6e90\u5728\u4e8e FMX.Platform.Android.pas \u4e2d\uff0c\u5b83\u7684 HandleAndroidKeyEvent \u662f\u5904\u7406\u952e\u76d8\u4e8b\u4ef6\u7684\uff0c\u5728\u5176\u4e2d\u6709\u8fd9\u4e48\u4e00\u884c\uff1a<\/p>\n<pre class=\"lang:delphi decode:true \">if not Assigned(SkipEvent) or (SkipEvent.getAction &lt;&gt; Action) or (SkipEvent.getFlags &lt;&gt; AKeyEvent_getFlags(AEvent)) or\r\n    (SkipEvent.getKeyCode &lt;&gt; KeyCode) or (SkipEvent.getMetaState &lt;&gt; MetaState) or (SkipEvent.getEventTime &lt;&gt; EventTime) or\r\n    (SkipEvent.getDownTime &lt;&gt; DownTime) then\r\n  begin\r\n    KeyChar := #0;\r\n\r\n    vkKeyCode := PlatformKeyToVirtualKey(KeyCode, KeyKind);<\/pre>\n<p>vkKeyCode \u9700\u8981\u8c03\u7528\u51fd\u6570 PlatformKeyToVirtualKey \u6765\u83b7\u53d6\u8f6c\u6362\u540e\u7684\u865a\u62df\u952e\u503c\uff0c\u800c\u6211\u4eec\u770b\u00a0PlatformKeyToVirtualKey \u7684\u5b9e\u73b0\uff1a<\/p>\n<pre class=\"lang:delphi decode:true \">function PlatformKeyToVirtualKey(const PlatformKey: Word; var KeyKind: TKeyKind): Word;\r\nvar\r\n  KeyInfo: TVirtualKeyInfo;\r\nbegin\r\n  Result := 0;\r\n  KeyKind := TKeyKind.Unknown;\r\n  if Assigned(vKeyMapping) and vKeyMapping.ContainsKey(PlatformKey) then\r\n  begin\r\n    KeyInfo := vKeyMapping[PlatformKey];\r\n    Result := KeyInfo.VirtualKey;\r\n    KeyKind := KeyInfo.KeyKind;\r\n  end;\r\nend;\r\n<\/pre>\n<p>\u5982\u679c\u6211\u4eec\u8ddf\u8e2a\u6e90\u7801\uff0c\u4f1a\u53d1\u73b0\u6309\u4e0b OK \u952e\u65f6 PlatformKey \u4e3a 23\uff0c\u800c\u7531\u4e8e\u5728 vKeyMapping \u4e2d\u627e\u4e0d\u5230\uff0c\u6240\u4ee5\u5c31\u8fd4\u56de\u4e86 0\u3002\u800c\u540e\u9762\u7684\uff1a<\/p>\n<pre class=\"lang:delphi decode:true \">if Assigned(FKeyCharacterMap) then\r\n      begin\r\n        KeyChar := Char(ObtainKeyCharacterMap(DeviceId).get(KeyCode, MetaState));\r\n        if KeyChar &lt;&gt; #0 then\r\n          KeyCode := 0\r\n        else\r\n          KeyCode := vkKeyCode;\r\n      end;<\/pre>\n<p>\u91cc\uff0cKeyChar \u5f97\u5230\u7684\u7ed3\u679c\u4e5f\u662f0\uff0c\u6240\u4ee5 KeyCode \u88ab\u8d4b\u503c\u4e3a vkKeyCode\u3002\u901a\u8fc7\u524d\u9762\u6211\u4eec\u77e5\u9053 vkKeyCode \u7684\u503c\u662f0\uff0c\u6240\u4ee5 KeyCode \u5c31\u662f0\u4e86\u3002\u8fdb\u4e00\u6b65\u8ddf\u8e2a\uff1a<\/p>\n<pre class=\"lang:delphi decode:true \">case AKeyEvent_getAction(AEvent) of\r\n      AKEY_EVENT_ACTION_DOWN:\r\n        begin\r\n          if (KeyCode = vkHardwareBack) and (KeyChar = #0) and (VirtualKeyboardAndroid &lt;&gt; nil) and\r\n            (VirtualKeyboardAndroid.VirtualKeyboardState * [TVirtualKeyboardState.Visible] &lt;&gt; []) then\r\n          begin\r\n            FDownKey := 0;\r\n            FDownKeyChar := #0;\r\n          end\r\n          else\r\n          begin\r\n            FDownKey := KeyCode;\r\n            FDownKeyChar := KeyChar;\r\n            TWindowManager.Current.KeyDown(KeyCode, KeyChar, ShiftStateFromMetaState(MetaState));\r\n          end;<\/pre>\n<p>\u5728\u8fd9\u91cc\u7b26\u5408 else \uff0c\u8fdb\u5165 KeyDown \u4e8b\u4ef6\uff0c\u7136\u540e\u8fdb\u4e00\u6b65\u8ddf\u8e2a\u4f1a\u8ddf\u8e2a\u5230 FMX.Form.pas \u91cc\u7684\u00a0TCommonCustomForm.KeyDown \uff0c\u7136\u540e\u4f60\u5c31\u4f1a\u53d1\u73b0\u5b83\u6ca1\u6709\u88ab\u89e6\u53d1\uff0c\u800c\u4e14\u7531\u4e8e\u524d\u9762\u7684 KeyCode\/KeyChar \u5747\u4e3a0\uff0c\u5df2\u7ecf\u5931\u53bb\u4e86\u89e6\u53d1\u7684\u610f\u4e49\uff0c\u7a0b\u5e8f\u5c06\u65e0\u6cd5\u533a\u5206\u8fd9\u4e9b\u529f\u80fd\u6309\u952e\u3002\u6240\u4ee5\u89e3\u51b3\u95ee\u9898\u7684\u529e\u6cd5\u5c31\u5728\u4e8e\u5c06 KeyCode \u5904\u7406\u4e0b\uff0c\u4e0d\u8ba9\u5176\u8fd4\u56de0\u3002<span style=\"line-height: 1.5;\">\u6211\u4eec\u8981\u505a\u7684\u5c31\u662f\u5c06\u8fd9\u4e2a\u6309\u952e\u52a0\u5165 vKeyMapping \u4e2d\uff0c\u8ba9\u5176\u8fd4\u56de\u975e0\u503c\u3002\u67e5\u770b\u76f8\u5173\u51fd\u6570\uff0c\u6211\u4eec\u4f1a\u53d1\u73b0\u6709\u4e24\u4e2a\u51fd\u6570\u503c\u5f97\u6211\u4eec\u5173\u6ce8\uff1a<\/span><\/p>\n<pre class=\"lang:delphi decode:true \">function RegisterKeyMapping(const PlatformKey, VirtualKey: Word; const KeyKind: TKeyKind): Boolean;\r\nfunction UnregisterKeyMapping(const PlatformKey: Word): Boolean;<\/pre>\n<p>\u8fd9\u4e24\u4e2a\u51fd\u6570\u4e00\u4e2a\u8d1f\u8d23\u6ce8\u518c\u6309\u952e\u6620\u5c04\uff0c\u53e6\u4e00\u4e2a\u8d1f\u8d23\u6ce8\u9500\u3002\u6240\u4ee5\u95ee\u9898\u4e5f\u5c31\u7b80\u5355\u4e86\uff0c\u6211\u4eec\u53ea\u9700\u8981\u6ce8\u518c\u4e0b 23 \uff08Androidapi.Keycodes \u91cc\u00a0AKEYCODE_DPAD_CENTER\uff09\u7684\u503c\u5c31\u89e3\u51b3\u4e86\uff1a<\/p>\n<pre class=\"lang:delphi decode:true \">procedure TForm1.FormCreate(Sender: TObject);\r\nbegin\r\nRegisterKeyMapping(23,23,TKeyKind.Functional);\r\nend;<\/pre>\n<p>\u597d\u4e86\uff0c\u8fd9\u4e2a\u4e1c\u4e1c\u5c31\u8fd9\u4e48\u89e3\u51b3\u4e86\u3002OnKeyDown \u548c OnKeyUp \u5f97\u5230\u4e86\u6b63\u786e\u7684\u7ed3\u679c\uff0c\u5728 FMX.UITypes \u4e2d\u865a\u62df\u952e\u503c 23 \u5bf9\u5e94\u7684\u662f\u00a0vkJunja \uff0c\u5269\u4e0b\u7684\u5c31\u4e0d\u9700\u8981\u6211\u591a\u8bf4\u4e86\uff0c\u5982\u679c\u9700\u8981\u8bf7\u6258\u68a6\u5427\u3002<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u505a\u5148\u9a71\u662f\u75db\u82e6\u7684\uff0c\u6b7b\u7684\u58ee\u70c8\uff0c\u6d3b\u7684\u618b\u5c48\u3002\u9047\u5230 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[145,69,8,21],"tags":[329,322,330,331],"class_list":["post-2012","post","type-post","status-publish","format-standard","hentry","category-android","category-c-builder","category-delphi","category-misc","tag-onkeydown","tag-322","tag-330","tag-331"],"views":9833,"_links":{"self":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/2012","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2012"}],"version-history":[{"count":1,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/2012\/revisions"}],"predecessor-version":[{"id":2013,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/2012\/revisions\/2013"}],"wp:attachment":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2012"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2012"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2012"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}