{"id":424,"date":"2021-01-25T22:20:09","date_gmt":"2021-01-25T22:20:09","guid":{"rendered":"http:\/\/www.kowanas.com\/coding\/?p=424"},"modified":"2021-01-25T22:20:11","modified_gmt":"2021-01-25T22:20:11","slug":"methodchannel","status":"publish","type":"post","link":"https:\/\/www.kowanas.com\/coding\/2021\/01\/25\/methodchannel\/","title":{"rendered":"\ub9ac\uc5bc Flutter #12 \ubd80\ub2f4\uc5c6\uc774 MethodChannel \uc0ac\uc6a9\ud558\uae30"},"content":{"rendered":"\n

Flutter\ub97c \uc2dc\uc791\ud560\ub54c \uac00\uc7a5 \uc5b4\ub835\uac8c \ub290\uaef4\uc9c4\uac8c MethodChannel \uc774\uc5c8\uc2b5\ub2c8\ub2e4. <\/p>\n\n\n\n

\uc624\ub298\uc740 MethodChannel\uc774 \uc5b4\ub835\uc9c0 \uc54a\uc74c\uc744 \ucd5c\ub300\ud55c \uc124\uba85\ud558\uace0\uc790 \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

\uadf8\ub9ac\uace0 flutter\ub294 cross platform\uc774\uc9c0\ub9cc \uc7a5\uc810\uc774 pub.dev<\/a>\ub97c \ud1b5\ud574\uc11c platform \uae30\ub2a5\uc744 \uc774\uc6a9\ud558\uae30 \uc704\ud55c library \uc81c\uacf5\ubc1b\uc744 \uc218 \uc788\ub294\uac83\uc774\uc9c0\ub9cc \ub610\ud55c \ud55c\uacc4\uac00 \uc788\uc74c\uc744 \uc790\uc8fc \ub290\ub08d\ub2c8\ub2e4.<\/p>\n\n\n\n

\ub0b4\uac00 \uc6d0\ud558\ub294 \uae30\ub2a5\uc774 \uc5c6\uac70\ub098 \uc608\uc0c1\ub300\ub85c \ub3d9\uc791\uc744 \uc548\ud558\ub294 \uacbd\uc6b0\ub4e4\uc774 \uac04\ud639 \uc788\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

\uadf8\ub798\uc11c \uc774\ub7f0 \uacbd\uc6b0 Android\uc5d0 \uc775\uc219\ud558\uc2e0 \uac1c\ubc1c\uc790\ubd84\ub4e4\uc740 Platform\uc5d0 \uace7\ubc14\ub85c \ucf54\ub4dc\ub97c \ub9cc\ub4e4\uc5b4 MethodChannel\uc744 \ud1b5\ud574\uc11c \uc0ac\uc6a9\ud558\ub294\uac8c \uc720\ub9ac\ud560 \uacbd\uc6b0\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

Flutter\ub294 Platform\uc548\uc5d0\uc11c \ub3d9\uc791<\/h2>\n\n\n\n

Flutter\ub294 \uadfc\ubcf8\uc801\uc73c\ub85c\ub294 Platform\uc548\uc5d0\uc11c \ub3d9\uc791\ud558\ub294 \uac83\uc774\uae30 \ub54c\ubb38\uc5d0 \uc9c0\uae08 \ub2e4\ub8e8\ub294 Android\ub294 \uc544\ub798 \uadf8\ub9bc\uacfc \uac19\uc774 MainActivity\ubd80\ud130 \uc2dc\uc791\ub418\uace0 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc989, Flutter\ub85c \uac1c\ubc1c\uc744 \ud558\uc9c0\ub9cc \uc2e4\uc81c\ub294 Android Platform\uc758 App Program\uc758 \uae30\ubcf8 \ub2e8\uc704\uc778 Activity \uae30\ubc18\uc73c\ub85c \ub3d9\uc791\ud558\uace0 \uc788\ub294 \uac83\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

MethodChannel\uc744 \uc54c\uc544\ubcf4\uba74 \ud50c\ub7ab\ud3fc \ubcc4 \ucf54\ub4dc \uc791\uc131<\/a>\uc744 \uae00\uc5d0 \uc788\ub294 \uc544\ud0a4\ud14d\ucc98 \uadf8\ub9bc\uc744 \uac00\uc7a5 \uba3c\uc800 \ubcf4\uac8c\ub418\ub294\ub370 \uc804 \uc798 \uc640\ub2ff\uc9c0 \uc54a\ub354\ub77c\uad6c\uc694.<\/p>\n\n\n\n

\"Platform<\/figure><\/div>\n\n\n\n

\uadf8\ub798\uc11c \ub2e4\uc2dc \uadf8\ub824\ubd24\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc544\ub798 \uadf8\ub9bc\uc5d0\uc11c \ud575\uc2ec\uc740 binary message\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc2e4\uc81c Platform API\ub97c \ud1b5\ud574\uc11c \ub3d9\uc791\ud574\uc57c \ud558\ub294 \uac83\uc740 Activity\uc5d0\uc11c \ub3d9\uc791\ud558\uace0 Flutter View\ub294 Activity\uc5d0 \uc874\uc7ac\ud558\ub294 code\ub97c \ud638\ucd9c\ud558\ub418 byte\ub85c \ub9cc\ub4e4\uc5b4\uc9c4 message\ub97c \ud1b5\ud574\uc11c interfacing\ud558\ub294 \uac83\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

\"MethodChannel<\/figure>\n\n\n\n

Flutter to Platform<\/h2>\n\n\n\n
\"\"<\/figure>\n\n\n\n

Channel \uc774\ub984 \uc815\ud558\uae30<\/h4>\n\n\n\n

“com.kowanas.idea_market\/main” \uc73c\ub85c \uc774\ub984\uc744 \uc815\ud558\uace0 activity\uc640 flutter \ucabd\uc5d0\uc11c\ub3c4 \uc774 \uc774\ub984\uc744 \ud1b5\ud558\uc5ec method call\uc744 \ud558\ub3c4\ub85d \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc0ac\uc6a9\ubc29\ubc95\uc740 MethodChannel(“com.kowanas.idea_market\/main”)\uc73c\ub85c Channel\uc774\ub984\uc744 \uc778\uc790\ub85c instance\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

Method \ud638\ucd9c\ud558\uae30<\/h4>\n\n\n\n

\uc55e\uc11c \ub9cc\ub4e4\uc5c8\ub358 MethodChannel instance\ub97c platform\uc774\ub77c\ub294 \uc774\ub984\uc73c\ub85c \uc815\uc758\ud558\uc600\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

platform.invokeMethod\ub97c \uc0ac\uc6a9\ud558\ub418 Method name\uc744 \uccab\ubc88\uc9f8 \uc778\uc790\ub85c \ub123\uc5b4\uc90d\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc704 \uc608\ub294 “request_permission”\uc774 Method name\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

Android\ucabd\uc5d0\uc11c\ub294 \ub2e4\uc74c \uc608\uc2dc\uc640 \uac19\uc774 call.method\ub85c \ucc38\uc870\ud558\uba74 \ub429\ub2c8\ub2e4.<\/p>\n\n\n\n

if (call.method == \"request_permission\")<\/code><\/p>\n\n\n\n

Argument \uc804\ub2ec\ud558\uae30<\/h4>\n\n\n\n

platform.invokeMethod\uc758 \ub450\ubc88\uc9f8 \uc778\uc790\ub85c \uc804\ub2ec\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

HashMap\uc744 \uc0ac\uc6a9\ud558\uc600\uace0 \ub0b4\ubd80\uc801\uc73c\ub85c Byte\ub85c \ubcc0\ud658\ud558\uc5ec encoding\/decoding\uc744 \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

\uadf8\ub7fc Android\ucabd\uc5d0\uc11c\ub294 call.argument(key<\/code>) \ub97c \uc774\uc6a9\ud558\uc5ec \uac12\uc744 \uc77d\uc5b4\uc635\ub2c8\ub2e4.<\/p>\n\n\n\n

\uacb0\uacfc Return\ud558\uae30<\/h4>\n\n\n\n

result.succss \ub610\ub294 result.error\ub97c \uc0ac\uc6a9\ud560 \uc218\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc544\ub798\ub294 Result Interface Code\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

\uc800\ub294 result.success\ub85c permission\uc774 \uc2b9\uc778\ub418\uc5c8\uc73c\uba74 true, \uc544\ub2c8\uba74 false\ub97c \uc778\uc790\ub85c return\ud558\ub3c4\ub85d \ud558\uc600\uc73c\uba70 \uc778\uc790 \ud0c0\uc785\uc740 \ub2e4\uc591\ud55c Object\ub97c \uc0ac\uc6a9\ud558\uc2dc\uba74 \ub429\ub2c8\ub2e4.<\/p>\n\n\n\n

Flutter\ucabd\uc5d0\uc11c \uc81c \ucf54\ub4dc\ub97c \ubcf4\uc2dc\uba74 return await platform.invokeMethod(.. \ub97c \ud558\ub294\ub370 \uc788\uc5b4 await\ub97c \uc0ac\uc6a9\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

invokeMethod \uacb0\uacfc\ub97c \ubc1b\uc744\ub54c\uae4c\uc9c0 \ub300\uae30\ud588\ub2e4\uac00 \ucc98\ub9ac\ud558\uae30 \uc704\ud568\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

\ud558\uc9c0\ub9cc, \uacbd\uc6b0\uc5d0 \ub530\ub77c\uc11c \uace7\ubc14\ub85c \uacb0\uacfc\ub97c \ubc1b\uc744 \uc218 \uc5c6\uace0 async\ub85c \uacb0\uacfc\ub97c \ubc1b\uc544\uc57c \ud558\ub294 \uacbd\uc6b0\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc774 \uacbd\uc6b0\ub294 EventChannel\uc744 \uc0ac\uc6a9\ud558\uac8c \ub418\ub294\ub370 \uc774 \ub0b4\uc6a9\uc740 \ub0b4\uc6a9\uc774 \uae38\uc5b4\uc9c0\uac8c \ub418\ub2c8 \ub2e4\ub978 Chapter\uc5d0\uc11c \uc124\uba85\ud558\ub3c4\ub85d \ud558\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\ub9c8\uce58\uba70<\/h2>\n\n\n\n

\uac04\ub2e8\ud558\uc9c0\ub9cc \uc870\uae08\ub9cc \uc800\uc758 \uc608\uc2dc\ub85c \uc62c\ub9b0 \ucf54\ub4dc\ub97c \uc0b4\ud3b4 \ubcf4\uba74 Method Channel \uc0ac\uc6a9\uc774 \uc5b4\ub835\uc9c0 \uc54a\uc74c\uc744 \uc54c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc989, Activity\uc5d0 \ub9cc\ub4e4\uc5b4\uc9c4 Code\ub97c \ud638\ucd9c\ud558\uae30 \uc704\ud574\uc11c MethodChannel\uc758 method\uc640 argument\ub85c \uad6c\uc131\uc774 \ub418\ub294 wrapper\ub97c \ub9cc\ub4e4\uc5b4\uc11c \uac19\uc740 \uc774\ub984\uacfc \uac19\uc740 key\ub85c Android Platform\uacfc Flutter\uac04\uc5d0 encoding\/decoding\ud558\uba74 \ub418\ub294 \uad6c\uc870\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

\uc704 \ucf54\ub4dc\ub294 Permission \ucc98\ub9ac\ub97c permission<\/a> library\ub97c \uc0ac\uc6a9\ud560 \uc218\ub3c4 \uc788\uaca0\uc9c0\ub9cc \uae30\uc874\uc5d0 \uc774\ubbf8 \ucf54\ub4dc\uac00 \ub9cc\ub4e4\uc5b4\uc838 \uc788\uac70\ub098 library\ub97c \uc775\ud788\ub294\uac83\ubcf4\ub2e4 \uc9c1\uc811 \ub9cc\ub4e4\uc5b4\ubc84\ub9ac\ub294\uac8c \uc790\uc5f0\uc2a4\ub7fd\ub2e4\uba74 \ubd80\ub2f4\uc5c6\uc774 platform code\ub97c \uad6c\ud604\ud558\uc5ec MethodChannel\uc744 \uc774\uc6a9\ud558\uc5ec \ud638\ucd9c\ud558\uc5ec \uc0ac\uc6a9\ud558\ub294 \uac83\uc774 \uc0dd\uc0b0\uc131\uacfc \uc720\uc9c0\ubcf4\uc218\uc5d0 \ud6e8\uc52c \uc720\ub9ac\ud560 \uc218\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\ub610\ub294 \uc6d0\ud558\ub294 platform\uae30\ub2a5\uc5d0 \ub300\ud55c library\uac00 \uc5c6\ub294 \uacbd\uc6b0\ub294 MethodChannel\uc744 \uc0ac\uc6a9\ud558\ub294 \uac83\uc774 \ud544\uc218\uaca0\uc8e0?<\/p>\n\n\n\n

\uc81c\uac00 Permission\uc744 \ucc98\ub9ac\ud558\ub294 code\ub294 github\uc5d0 idea_market c41128<\/a> \uc744 \ucc38\uc870\ud558\uc2dc\uba74 \ub429\ub2c8\ub2e4.<\/p>\n\n\n\n

\ub2e4\uc74c Chapter\ub97c Permission \ucc98\ub9ac\ub97c \uad6c\ud604\ud55c\uac78 \uc815\ub9ac\ud560\uc9c0 camera \uc0ac\uc6a9\uc744 \uc815\ub9ac\ud560\uc9c0 \uace0\ubbfc\uc911\uc785\ub2c8\ub2e4. <\/p>\n\n\n\n

\uadf8\ub7f0\ub370 \uc0dd\uac01\ud574\ubcf4\uba74 Flutter\ub9cc \uac00\uc9c0\uace0 \uc571\uc758 \ubaa8\ub4e0 \uae30\ub2a5\uc744 \uc644\uc131\ud558\uc9c0 \ubabb\ud558\ub294 \uac83\uc740 \uacb0\uad6d Android Platform Code\ub97c \uad6c\ud604\ud558\ub294 \uc2a4\ud0ac\uc744 \ubc30\uc6cc\uc57c \ud558\ub2c8 Flutter\uc758 \ub2e8\uc810\uc774 \ub420 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"

Flutter\ub97c \uc2dc\uc791\ud560\ub54c \uac00\uc7a5 \uc5b4\ub835\uac8c \ub290\uaef4\uc9c4\uac8c MethodChannel \uc774\uc5c8\uc2b5\ub2c8\ub2e4. \uc624\ub298\uc740 MethodChannel\uc774 \uc5b4\ub835\uc9c0 \uc54a\uc74c\uc744 \ucd5c\ub300\ud55c \uc124\uba85\ud558\uace0\uc790 \ud569\ub2c8\ub2e4. \uadf8\ub9ac\uace0 flutter\ub294 cross platform\uc774\uc9c0\ub9cc \uc7a5\uc810\uc774 pub.dev\ub97c \ud1b5\ud574\uc11c platform \uae30\ub2a5\uc744 \uc774\uc6a9\ud558\uae30 \uc704\ud55c library \uc81c\uacf5\ubc1b\uc744 \uc218 \uc788\ub294\uac83\uc774\uc9c0\ub9cc \ub610\ud55c \ud55c\uacc4\uac00 \uc788\uc74c\uc744 \uc790\uc8fc \ub290\ub08d\ub2c8\ub2e4. \ub0b4\uac00 \uc6d0\ud558\ub294 \uae30\ub2a5\uc774 \uc5c6\uac70\ub098 \uc608\uc0c1\ub300\ub85c \ub3d9\uc791\uc744 \uc548\ud558\ub294 \uacbd\uc6b0\ub4e4\uc774 \uac04\ud639 \uc788\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4. \uadf8\ub798\uc11c \uc774\ub7f0 \uacbd\uc6b0 Android\uc5d0 \uc775\uc219\ud558\uc2e0 \uac1c\ubc1c\uc790\ubd84\ub4e4\uc740 Platform\uc5d0 \uace7\ubc14\ub85c \ucf54\ub4dc\ub97c \ub9cc\ub4e4\uc5b4 … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,13],"tags":[8,9],"class_list":["post-424","post","type-post","status-publish","format-standard","hentry","category-programming","category-13","tag-flutter","tag-9"],"yoast_head":"\n\ub9ac\uc5bc Flutter #12 \ubd80\ub2f4\uc5c6\uc774 MethodChannel \uc0ac\uc6a9\ud558\uae30 - 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