{"id":87534,"date":"2020-10-23T05:03:08","date_gmt":"2020-10-23T05:03:08","guid":{"rendered":"https:\/\/blog.jetbrains.com\/?p=87534"},"modified":"2020-12-10T04:46:15","modified_gmt":"2020-12-10T03:46:15","slug":"cross-platform-development-using-ktor-and-flutter-record-video","status":"publish","type":"post","link":"https:\/\/blog.jetbrains.com\/zh-hans\/2020\/10\/23\/cross-platform-development-using-ktor-and-flutter-record-video\/","title":{"rendered":"\u7f51\u7edc\u7814\u8ba8\u4f1a\u89c6\u9891\uff1aFlutter x Ktor \u6253\u9020\u8de8\u5e73\u53f0\u5168\u7aef\u5e94\u7528"},"content":{"rendered":"\u8de8\u5e73\u53f0\u4e00\u76f4\u662f\u5927\u5bb6\u8ffd\u6c42\u7684\u68a6\u60f3\u3002\u5bf9\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u53ea\u8981\u7ef4\u62a4\u4e00\u4e2a Code Base \u5c31\u80fd\u90e8\u7f72\u81f3\u591a\u4e2a\u5e73\u53f0\u53ef\u4ee5\u7701\u4e0b\u4e0d\u5c11\u5de5\u4f5c\u65f6\u95f4\uff1b\u5bf9\u4f01\u4e1a\u6765\u8bf4\uff0c\u53ef\u4ee5\u66f4\u5feb\u901f\u4ea4\u4ed8\u4ea7\u54c1\u3001\u9a8c\u8bc1\u5e02\u573a\u3002\u672c\u6b21\u7f51\u7edc\u7814\u8ba8\u4f1a\u8fd0\u7528\u4e24\u79cd\u8de8\u5e73\u53f0\u6280\u672f\uff1aFlutter \u53ca Ktor\uff0cFlutter \u5728\u79fb\u52a8\u7aef\u6709\u7740\u4e00\u81f4\u7684 UI \u8868\u73b0\uff0cKtor \u7f16\u8bd1\u540e\u53ef\u4ee5\u5728\u8de8\u5e73\u53f0\u7684\u670d\u52a1\u5668\u4e0a\u8fd0\u884c\uff0c\u7531\u4e24\u4f4d\u8bb2\u5e08\u4e3a\u5927\u5bb6\u6f14\u793a\u5982\u4f55\u4e32\u8d77\u4e24\u79cd\u6280\u672f\uff0c\u4ece\u524d\u7aef\u5230\u540e\u7aef\u6253\u9020\u8de8\u5e73\u53f0\u5168\u7aef\u5e94\u7528\u3002\n\n\uff08\u672c\u6b21\u89c6\u9891\u5df2\u540c\u6b65\u53d1\u8868\u81f3 B \u7ad9\uff09\n\u4e3b\u984c\u5206\u4eab\n\u672c\u6b21\u5206\u4eab\u7531\u6ef4\u6ef4\u51fa\u95e8 Flutter \u5de5\u7a0b\u5e08\u946b\u78ca\u53ca JetBrains \u6280\u672f\u5e03\u9053\u5e08\u5723\u4f51\u4e24\u4eba\u5408\u529b\u5b8c\u6210\u4e00\u4e2a\u65e5\u8bb0\u5e94\u7528\uff0c\u7531\u946b\u78ca\u4ee5 Flutter \u5b9e\u4f5c Mobile App\u3001\u518d\u4e32\u63a5\u7531\u5723\u4f51\u4ee5 Ktor \u5b9e\u4f5c\u7684 Backend API\u3002\u5b9e\u4f5c\u7684\u90e8\u4efd\u7531\u946b\u78ca\u7684\u524d\u7aef\u5f00\u59cb\uff0c\u946b\u78ca\u9996\u5148\u7b80\u4ecb Flutter \u6280\u672f\u7684\u6982\u5ff5\u53ca\u73b0\u51b5\uff0c\u5e76\u5728 Android Studio \u4e0a\u521b\u5efa\u4e00\u4e2a\u5168\u65b0\u7684\u9879\u76ee\uff0c\u4ee5 Flutter Widget \u9010\u6b65\u5b8c\u6210\u4e24\u4e2a App \u9875\u9762\uff0c\u5305\u62ec\u65e5\u8bb0\u5217\u8868\u9875\uff08\u7a7a\u7684\u72b6\u6001\u53ca\u6709\u65e5\u8bb0\u7684\u72b6\u6001\uff09\u53ca\u65e5\u8bb0\u7f16\u8f91\u9875\u3002\u5728 Flutter Hot Reload \u7684\u5e2e\u52a9\u4e0b\uff0c\u946b\u78ca\u53ea\u82b1\u4e86\u7ea6 20 \u5206\u949f\u5c31\u521b\u5efa\u4e86\u4e00\u4e2a\u6697\u8272\u4e3b\u9898\u3001\u53ef\u4ee5\u7f16\u8f91\/\u50a8\u5b58\/\u6d4f\u89c8\u65e5\u8bb0\u7684 Flutter App\u3002\n\n\u63a5\u7740\u5c31\u7531\u5723\u4f51\u63a5\u624b\u4ecb\u7ecd Ktor\u3002Ktor \u662f\u7531 JetBrains \u56e2\u961f\u4ee5 100% Kotlin \u6253\u9020\u7684 Web \u6846\u67b6\uff0c\u63d0\u4f9b\u4e86 Server \u53ca Client \u4e24\u79cd\u7ec4\u4ef6\uff0c\u8f7b\u91cf\u3001\u8bed\u6cd5\u7b80\u6d01\u6613\u5b66\u662f\u5b83\u7684\u7279\u8272\uff0c\u975e\u5e38\u9002\u5408\u7528\u4e8e\u7f51\u7ad9\u3001API \u53ca\u5fae\u670d\u52a1\u3002\u5728 IntelliJ IDEA \u91cc\u521b\u5efa\u597d Ktor \u9879\u76ee\u540e\uff0c\u5723\u4f51\u5c31\u4ece UI \u53bb\u601d\u8003 JSON \u683c\u5f0f\uff0c\u518d\u4ece JSON \u683c\u5f0f\u53bb\u8bbe\u8ba1\u4ea4\u6362\u8d44\u6599\u6240\u9700\u7684 Kotlin Data Class\u3002\u63a5\u7740\u4f9d\u5e8f\u5b89\u88c5\u4f9d\u8d56\u3001\u8bbe\u8ba1\u6570\u636e\u5e93\u3001\u8f7d\u5165 Ktor ContentNegotiation Feature\u3001\u914d\u7f6e Route\u3001\u64cd\u4f5c\u6570\u636e\u5e93\u3001\u9519\u8bef\u5904\u7406\uff0c\u9010\u6b65\u5b8c\u6210\u4e00\u4e2a\u540e\u7aef API\uff0c\u6700\u540e\u90e8\u7f72\u4e0a\u4e91\u3002\n\n\u5728\u62ff\u5230 JSON API \u540e\uff0c\u946b\u78ca\u5411\u5927\u5bb6\u4ecb\u7ecd Flutter \u72b6\u6001\u7ba1\u7406\u7684\u89c2\u5ff5\uff0c\u5e76\u5728\u6f14\u793a\u7684\u65e5\u8bb0\u5e94\u7528\u91cc\u5f00\u59cb\u5b9e\u73b0\u3002\u4e3a\u4e86\u53d6\u5f97\u540e\u7aef\u6570\u636e\uff0c\u9996\u5148\u8981\u5728\u9879\u76ee\u91cc\u96c6\u6210 http \u5e93\uff0c\u5728\u53d1\u51fa HTTP Request \u62ff\u5230 JSON \u540e\uff0c\u901a\u8fc7 json.decode \u8f6c\u6210 Map\uff0c\u518d\u4ee5 Diary Model.fromJson \u5c06 API \u53d6\u5f97\u7684\u6570\u636e\u8f6c\u6210 Flutter \u53ef\u4ee5\u64cd\u4f5c\u7684 Model\uff0c\u6700\u540e\u7531\u6570\u636e\u8d8b\u52a8 UI \u66f4\u65b0\u3002\u5c31\u8fd9\u6837\uff0c\u4e00\u4e2a\u53ef\u4ee5\u540c\u6b65\u540e\u7aef API \u7684 Diary Mobile App \u5c31\u5728\u4e24\u4eba\u8054\u624b\u4e0b\uff0c\u53ea\u82b1\u7ea6 1 \u5c0f\u65f6\u5c31\u5b8c\u6210\uff01\n\u6f14\u793a\u5b8c\u540e\u7684\u95ee\u7b54\u73af\u8282\u975e\u5e38\u70ed\u70c8\uff0c\u5728\u8fd9\u8fb9\u5c06\u540c\u5b66\u4eec\u7684\u63d0\u95ee\u6574\u7406\u5982\u4e0b\uff1a\n\u554f\u7b54\nQ. Kotlin\/Ktor \u53ca Flutter \u5404\u6709\u4ec0\u4e48\u65b0\u52a8\u6001\uff1f\n\u5723\u4f51\uff1aKotlin \u5728\u4eca\u5e74 8 \u6708\u4e2d\u6b63\u5f0f\u53d1\u5e03 1.4\uff0c\u63a5\u7740 9 \u6708\u4e2d\u6301\u7eed\u53d1\u5e03 1.4.10 \u7b49\u66f4\u65b0\u3002\u8fd9\u6b21\u66f4\u65b0\u7684\u91cd\u70b9\u5728\u4ee3\u7801\u8d28\u91cf\u53ca\u6027\u80fd\uff0c10\/12-10\/15 \u8fd9\u5468 Kotlin \u56e2\u961f\u4f1a\u4e3e\u529e\u7f51\u7edc\u5927\u4f1a\uff0c\u5206\u8bed\u8a00\u3001\u5e93\u3001KMM\uff08Kotlin Multiplatform Mobile\uff09\u53ca Backend \u56db\u5927\u4e3b\u9898\u5206\u4eab\u65b0\u7248\u672c\u7684\u529f\u80fd\u7279\u6027\uff0c\u6709\u5174\u8da3\u7684\u670b\u53cb\u53ef\u4ee5\u7ebf\u4e0a\u62a5\u540d\u3002\u968f\u7740 1.4 \u7684\u53d1\u5e03\uff0c Ktor \u4e5f\u4e00\u5e76\u66f4\u65b0\u81f3 1.4.0\uff0c\u4e5f\u6709\u5168\u65b0\u7684\u5b98\u7f51\uff0c\u6587\u6863\u4e5f\u6b63\u5728\u66f4\u65b0\u4e2d\uff0c\u8bf7\u5927\u5bb6\u671f\u5f85\u3002\u4e60\u60ef\u770b\u4e2d\u6587\u7684\u670b\u53cb\u53ef\u4ee5\u6d4f\u89c8 \u7531 Kotlin User Group \u7ffb\u8bd1\u7684\u7248\u672c\u3002\n\u946b\u78ca\uff1a\u6700\u8fd1 Flutter \u6bd4\u8f83\u591a\u7684\u65b0\u52a8\u6001\u90fd\u662f\u5728\u591a\u5e73\u53f0\u65b9\u9762\uff0c\u6700\u8fd1\u521a\u516c\u5e03\u4e86\u5bf9 Windows \u5e73\u53f0\u7684\u652f\u6301\uff0c\u76ee\u524d\u662f Alpha \u7248\uff0c\u6211\u4f30\u8ba1\u5728\u5e74\u5e95\u6216\u660e\u5e74\u4e0a\u534a\u5e74\u5e94\u8be5\u4f1a\u76f8\u5bf9 Stable\uff0c\u8be6\u7ec6\u7684\u4fe1\u606f\u53ef\u4ee5\u53c2\u8003 Flutter \u5b98\u65b9 Medium \u4e0a\u7684\u6587\u7ae0\uff0c\u6211\u4eec \u4e2d\u6587\u793e\u533a \u4e5f\u4f1a\u6301\u7eed\u63d0\u4f9b\u76f8\u5173\u7684\u4fe1\u606f\u3002\nQ. Flutter \u4f1a\u53d6\u4ee3 Android \u548c iOS \u5417\uff1fFlutter \u503c\u5f97\u4e0d\u503c\u5f97\u540e\u7aef\u5b66\u4e60\u5462\uff1f\n\u946b\u78ca\uff1a\u5b9e\u9645\u4e0a\u6700\u5f00\u59cb\u6211\u4e5f\u662f\u540e\u7aef\uff0c\u4e3b\u8981\u7814\u7a76 Spring Boot \u65b9\u9762\u3002\u539f\u672c\u4ee5\u4e3a\u81ea\u5df1\u4e00\u8f88\u5b50\u4e0d\u4f1a\u505a\u4ecb\u9762\uff0c\u5f00\u59cb\u63a5\u89e6 Flutter \u540e\u89c9\u5f97\u5199 UI \u5f88\u597d\u73a9\uff0c\u4e0a\u624b\u540e\u89c9\u5f97 Flutter \u7684\u53d1\u5c55\u633a\u597d\u7684\uff0c\u6240\u4ee5\u5c31\u51b3\u5b9a\u5f80 Flutter \u8d70\u3002\u6211\u89c9\u5f97\u8fd8\u662f\u8981\u5148\u770b\u9700\u6c42\uff0c\u5047\u5982\u4f60\u7684\u5de5\u4f5c\u521a\u597d\u6709\u9700\u8981\u5904\u7406\u5168\u6808\u7684\u9700\u6c42\uff0c\u90a3\u7528 Flutter \u505a\u8de8\u7aef\u5e94\u7528\u7684\u5b66\u4e60\u6210\u672c\u662f\u6bd4\u8f83\u4f4e\u7684\u3002\n\u5723\u4f51\uff1a\u6bcf\u4e2a\u6280\u672f\u5728\u89e3\u51b3\u95ee\u9898\u7684\u601d\u8def\u662f\u4e0d\u592a\u4e00\u6837\u7684\uff0c\u6240\u4ee5\u6211\u4f1a\u9f13\u52b1\u5927\u5bb6\u591a\u63a5\u89e6\u4e0d\u540c\u7684\u6280\u672f\uff0c\u4e86\u89e3\u540e\u518d\u9009\u81ea\u5df1\u559c\u6b22\u7684\u3002\u8fd9\u6b21\u4e4b\u6240\u4ee5\u6311 Flutter \u548c Ktor\uff0c\u5c31\u662f\u56e0\u4e3a\u8fd9\u4e24\u79cd\u6280\u672f\u90fd\u80fd\u591f\u8de8\u7aef\u4f7f\u7528\uff0c\u5927\u5bb6\u53ef\u4ee5\u4f9d\u7167\u81ea\u5df1\u7684\u559c\u597d\u548c\u719f\u6089\u7684\u7f16\u7a0b\u8bed\u8a00\u6765\u9009\u62e9\u3002\nQ. Ktor \u5f00\u53d1\u7684\u540e\u53f0\u5e94\u7528\u80fd\u6700\u591a\u540c\u65f6\u627f\u62c5\u591a\u5c11\u8bbf\u95ee\u91cf\u5462\uff0c\u56e0\u4e3a\u4e00\u76f4\u5728\u505a\u79fb\u52a8\u7aef\u5f00\u53d1\uff0c\u5bf9\u540e\u7aef\u4e0d\u662f\u5f88\u4e86\u89e3\uff0c\u6700\u8fd1\u60f3\u7528 Ktor \u6765\u5b9e\u73b0 API \u505a\u4e00\u6b3e\u72ec\u7acb\u5e94\u7528\uff0c\u5728\u8fd9\u65b9\u4fbf\u6bd4\u8f83\u6b20\u7f3a\u3002\u6709\u6ca1\u6709\u66f4\u7ec6\u81f4\u4e00\u70b9\u7684\u90e8\u7f72\uff0c\u4f18\u5316\u7684\u6587\u6863\u5462\uff1f\u5b98\u65b9\u6587\u6863\u611f\u89c9\u4e1c\u897f\u8fd8\u662f\u592a\u57fa\u7840\u3002\n\u5723\u4f51\uff1a\u4e00\u4e2a\u5e94\u7528\u80fd\u627f\u62c5\u591a\u5c11\u8bbf\u95ee\u91cf\u53d6\u51b3\u4e8e\u600e\u4e48\u64b0\u5199\u4ee5\u53ca\u90e8\u7f72\u65f6\u67b6\u6784\u600e\u4e48\u8bbe\u8ba1\uff0c\u6240\u4ee5\u6ca1\u529e\u6cd5\u76f4\u63a5\u62ff\u51fa\u4e00\u4e2a\u6570\u636e\u6765\u8bf4\u660e\u3002\u4e0d\u8fc7 Ktor \u5728\u8bbe\u8ba1\u4e0a\u662f\u76f8\u5bf9\u8f7b\u91cf\u7684\u6846\u67b6\uff0c\u5728\u6027\u80fd\u4e0a\u4f1a\u6bd4\u5927\u578b\u6846\u67b6\u597d\uff0c\u5f88\u9002\u5408\u62ff Ktor \u5f00\u53d1 API \u6216\u5fae\u670d\u52a1\u3002\u6587\u6863\u7684\u90e8\u4efd\uff0c\u76ee\u524d Ktor \u56e2\u961f\u6b63\u5728\u66f4\u65b0\uff0c\u672a\u6765\u4e5f\u4f1a\u589e\u52a0\u66f4\u591a\u7684\u5185\u5bb9\uff0c\u6211\u4e5f\u4f1a\u5c06\u8fd9\u4e2a\u9700\u6c42\u63d0\u4ea4\u7ed9\u56e2\u961f\u53c2\u8003\u3002\nQ. \u8bf7\u95ee Ktor \u548c Spring Boot \u76f8\u6bd4\u6709\u4ec0\u4e48\u4f18\u52bf\uff1f\n\u5723\u4f51\uff1aKtor \u76f8\u6bd4\u4e8e Spring Boot \u7684\u4f18\u52bf\u6709\u51e0\u4e2a\uff0c\u5305\u62ec\u5b83\u662f 100% \u7528 Kotlin \u5b9e\u73b0\uff0c\u6240\u4ee5\u8bed\u6cd5\u7279\u6027\u4f1a\u6bd4\u8f83\u7b26\u5408 Kotlin \u5f00\u53d1\u8005\u7684\u4e60\u60ef\u4e0e\u559c\u597d\u3002\u5b83\u7684\u6838\u5fc3\u529f\u80fd\u6bd4\u8f83\u8f7b\u5de7\uff0c\u6027\u80fd\u8f83\u5927\u578b\u6846\u67b6\u6765\u5f97\u597d\u3002\u4e0d\u8fc7\u56e0\u4e3a Ktor \u76f8\u5bf9\u662f\u8f83\u5e74\u8f7b\u7684\u6846\u67b6\uff0c\u6240\u4ee5\u529f\u80fd\uff08\u5728 Ktor \u79f0\u4e3a Feature\uff09\u76ee\u524d\u76f8\u6bd4\u5176\u4ed6\u6846\u67b6\u8f83\u5c11\uff0c\u4e00\u4e9b\u8f83\u4e3a\u590d\u6742\u7684\u529f\u80fd\u4f1a\u7f3a\u4e4f\u5f00\u7bb1\u5373\u7528\u7684\u65b9\u6848\u3002\u6211\u4f1a\u5efa\u8bae\u4e24\u79cd\u6846\u67b6\u90fd\u73a9\u73a9\u770b\uff0c\u5c31\u80fd\u6e05\u695a\u4e24\u8005\u95f4\u7684\u5dee\u5f02\u3002\nQ. Ktor \u80fd\u591f\u652f\u6301 protobuf \u4f5c\u4e3a\u4f20\u8f93\u534f\u8bae\u5417\uff1f\n\u5723\u4f51\uff1a\u76ee\u524d Ktor \u8fd8\u6ca1\u6709\u652f\u6301\u3002\u4e0d\u8fc7\u8fd9\u4e2a\u5efa\u8bae\u5df2\u7ecf\u7eaa\u5f55\u5728 Ktor \u56e2\u961f\u7684 Issue Tracking \u4e0a\u4e86\uff0c\u5047\u5982\u4f60\u4e5f\u5e0c\u671b Ktor \u5728\u672a\u6765\u80fd\u652f\u6301\u8fd9\u4e2a\u7279\u6027\u7684\u8bdd\uff0c\u6b22\u8fce\u5230 YouTrack \u4e0a\u6309\u8d5e\u3002\u6309\u8d5e\u6570\u6108\u9ad8\uff0c\u56e2\u961f\u4f1a\u63d0\u9ad8\u8fd9\u4e2a\u5de5\u4f5c\u7684\u4f18\u5148\u5e8f\u3002\nQ. fromJson \u5982\u4f55\u5feb\u901f\u751f\u6210\u7684\uff1f\n\u946b\u78ca\uff1a\u5728\u6f14\u793a\u7684\u8fc7\u7a0b\u4e2d\u4e3a\u4e86\u7ed3\u7701\u6253\u5b57\u7684\u65f6\u95f4\uff0c\u6240\u4ee5\u6211\u662f\u7528 IDE \u91cc\u7684 Live Template \u6765\u5feb\u901f\u751f\u6210\u7684\u3002\u771f\u5b9e\u5f00\u53d1\u7684\u65f6\u5019\uff0c\u6211\u5efa\u8bae\u5927\u5bb6\u4f7f\u7528\u5b98\u65b9\u63a8\u8350\u7684 JSON Serializable \u8fd9\u4e2a\u5e93\u3002\u4e0d\u8fc7\u8fd9\u4e2a\u5e93\u8ddf\u81ea\u5df1\u4e60\u60ef\u5b9a\u4e49\u7684\u65b9\u5f0f\u53ef\u80fd\u4e0d\u540c\uff0c\u6bd4\u65b9\u8bf4\u5728 Key \u7684\u5904\u7406\u4e0a\u9884\u8bbe\u662f\u7528 Lower Camel Case\uff0c\u4f46\u6211\u53ef\u80fd\u60f3\u7528 Snake Case\uff0c\u56e0\u6b64\u5728\u4f7f\u7528\u4e0a\u8981\u6ce8\u610f\u4e00\u4e0b\u3002\n\u5723\u4f51\uff1aLive Template \u662f IntelliJ \u7cfb\u5217 IDE \u90fd\u6709\u7684\u529f\u80fd\uff0cAndroid Studio \u56e0\u4e3a\u4e5f\u662f\u7528 IntelliJ \u5e73\u53f0\u5b9e\u73b0\uff0c\u6240\u4ee5\u4e5f\u6709\u8fd9\u4e2a\u529f\u80fd\u3002\u4f60\u53ef\u4ee5\u8bbe\u7f6e\u4e00\u4e2a\u5173\u952e\u5b57\u540e\u6309 Tab\uff0c\u5c31\u53ef\u4ee5\u5feb\u901f\u751f\u6210\u4e00\u6bb5\u4ee3\u7801\u6a21\u5757\uff0c\u5728\u5f00\u53d1\u6216\u6f14\u793a\u7684\u65f6\u5019\u7279\u522b\u597d\u7528\u3002\nQ. \u76f4\u64ad\u4e2d\u63d0\u5230\u7684 Bloc \u4e2d\uff0cSink \u548c Stream \u4e24\u4e2a\u5bf9\u8c61\u5b83\u4eec\u5728\u529f\u80fd\u4e0a\u6709\u4ec0\u4e48\u4fa7\u91cd\u70b9\uff0c\u80fd\u7b80\u5355\u4ecb\u7ecd\u4e0b\u5417\uff1f\u4e3a\u4ec0\u4e48\u8981\u8bbe\u8ba1\u6210\u4e24\u4e2a\u5bf9\u8c61\u6765\u5b9e\u73b0 bloc\uff1f\n\u946b\u78ca\uff1aSink \u548c Stream \u90fd\u662f StreamController \u63d0\u4f9b\u7684\u6210\u5458\u53d8\u91cf\uff0c\u4f60\u53ef\u4ee5\u7406\u89e3\u65b9 StreamController \u4e00\u521b\u5efa\u51fa\u6765\u540e\u5c31\u4f1a\u6709 Sink \u548c Stream\u3002\u5f53\u8d44\u6599\u901a\u8fc7 Sink\u3001StreamController \u53ca Stream \u540e\uff0cUI \u5c31\u4f1a\u5728\u89c2\u5bdf\u540e\u8fdb\u884c\u5904\u7406\uff0c\u6f14\u793a\u91cc\u7684 StreamBuilder \u5c31\u662f\u5728\u63a5\u5230\u6570\u636e\u540e\u66f4\u65b0 UI\uff0c\u4e5f\u5c31\u5b8c\u6210\u4e86\u72b6\u6001\u66f4\u65b0\u3002\nQ. 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