{"id":1080,"date":"2019-02-19T18:40:17","date_gmt":"2019-02-19T09:40:17","guid":{"rendered":"https:\/\/www.charlezz.com\/?p=1080"},"modified":"2019-02-19T18:40:17","modified_gmt":"2019-02-19T09:40:17","slug":"%ec%95%88%eb%93%9c%eb%a1%9c%ec%9d%b4%eb%93%9c%ec%9d%98-context","status":"publish","type":"post","link":"https:\/\/charlezz.com\/?p=1080","title":{"rendered":"\uc548\ub4dc\ub85c\uc774\ub4dc\uc758 Context"},"content":{"rendered":"

Android\uc758 Context\ub780?<\/h1>\n

Application, Service, Activity \ubaa8\ub450 Context\ub97c \uc0c1\uc18d \ud588\ub2e4\ub294 \uc0ac\uc2e4 \uc54c\uace0\uacc4\uc168\ub098\uc694?<\/p>\n

\"enter<\/h2>\n

\uacf5\uc2dd\ubb38\uc11c\uc5d0 \ub098\uc640\uc788\ub294 Context<\/a>\uc758 \uac1c\uc694\ub97c \ud655\uc778\ud574\ubcf4\uba74,<\/p>\n\n\n\n
\uc560\ud50c\ub9ac\ucf00\uc774\uc158 \ud658\uacbd\uc5d0 \ub300\ud55c \uc804\uc5ed\uc815\ubcf4\uac00\u00a0\ucee8\ud14d\uc2a4\ud2b8\ub85c \uc5f0\uacb0\ub429\ub2c8\ub2e4. Context\ub294 \uad6c\ud604\uc774 Android \uc2dc\uc2a4\ud15c\uc5d0 \uc758\ud574 \uc81c\uacf5\ub418\ub294 \ucd94\uc0c1 \ud074\ub798\uc2a4\uc785\ub2c8\ub2e4. \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \ubcc4\ub85c \ub9ac\uc18c\uc2a4 \ubc0f \ud074\ub798\uc2a4\uc5d0 \ub300\ud55c \uc811\uadfc\uc740 \ubb3c\ub860 Activity\uc758 \uc2e4\ud589, \ube0c\ub85c\ub4dc \uce90\uc2a4\ud305 \ubc0f Intent\uc218\uc2e0\uacfc \uac19\uc740 \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \ub808\ubca8\uc5d0 \ub300\ud55c \ud638\ucd9c\uc744 \ud5c8\uc6a9\ud569\ub2c8\ub2e4.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\uc27d\uac8c \ub9d0\ud574 Context\ub97c \uc774\uc6a9\ud558\uba74 getPackageName(), getResource(), startActivity(), startService(), getSystemService()\uc640 \uac19\uc774 \uc2dc\uc2a4\ud15c \ub808\ubca8\uc758 \uc815\ubcf4\ub97c \uc5bb\uc744\uc218 \uc788\ub294 \uba54\uc18c\ub4dc\ub97c \uc4f8\uc218 \uc788\uc2b5\ub2c8\ub2e4.\u00a0\ub610\ud55c Context\ub294 \uc2dc\uc2a4\ud15c\uc5d0 \ub300\ud55c \ub9ac\uc18c\uc2a4 \ud655\uc778, \ub370\uc774\ud130\ubca0\uc774\uc2a4 \ubc0f \ud658\uacbd \uc124\uc815\uc5d0 \ub300\ud55c \uc561\uc138\uc2a4 \ud655\ubcf4 \ub4f1\uacfc \uac19\uc740 \uc11c\ube44\uc2a4\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4. Android \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \ub0b4\uc5d0 \ub2e4\uc218\uc758Activity\ub4e4\uc774 \uc874\uc7ac\ud560 \uc218 \uc788\uc73c\uba70, \uc774\uac83\uc740 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc774 \ud604\uc7ac \uc2e4\ud589\uc911\uc778 \ud658\uacbd\uc5d0 \ub300\ud55c \ud578\ub4e4\uacfc \uac19\uc2b5\ub2c8\ub2e4. \ub9e8\uc704\uc5d0\uc11c \ub9d0\uc500 \ub4dc\ub838\ub4ef\uc774 Activity \uac1d\uccb4\ub294 Context \uac1d\uccb4\ub97c \uc0c1\uc18d\ubc1b\uc2b5\ub2c8\ub2e4. \uc989 Activity\ub294 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc758 \ud2b9\uc815\uc790\uc6d0, \ud074\ub798\uc2a4,\uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc758 \ud658\uacbd \uc815\ubcf4\uc5d0 \ub300\ud574 \uc811\uadfc\ud560 \uc218 \uc788\uac8c \ub429\ub2c8\ub2e4.<\/p>\n

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\n
\n
\n
Context\ub294 Android \uac1c\ubc1c\uc5d0 \uc788\uc5b4\uc11c \uac70\uc758 \ubaa8\ub4e0 \uacf3\uc5d0\uc11c \uc774\ub8e8\uc5b4\uc9c0\uba70 , \uac00\uc7a5 \uc911\uc694\ud55c \ubd80\ubd84\uc774\ubbc0\ub85c \uc62c\ubc14\ub85c \uc0ac\uc6a9\ud558\ub824\uba74 \ubc18\ub4dc\uc2dc \uaf2d \uc774\ud574\ud558\uace0 \ub118\uc5b4\uac00\uc57c \ud569\ub2c8\ub2e4. \uc65c\ub0d0\ud558\uba74 \uc798\ubabb \uc0ac\uc6a9\ud558\uba74 \uba54\ubaa8\ub9ac \ub204\uc218\ub85c \uc774\uc5b4\uc9c8 \uc218 \uc788\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4.\u00a0\uc548\ub4dc\ub85c\uc774\ub4dc\uc5d0\ub294 \ub9ce\uc740 \ub2e4\ub978 \uc720\ud615\uc758 Context\uac00 \uc788\uc73c\ubbc0\ub85c, \uadf8\uac83\ub4e4\uc774 \ubb34\uc5c7\uc778\uc9c0, \uadf8\uac83\ub4e4\uc744 \uc0ac\uc6a9\ud558\ub294 \ubc29\ubc95 \uadf8\ub9ac\uace0 \uc5b8\uc81c \uc5b4\ub5a4 \uac83\uc744 \uc0ac\uc6a9 \ud558\ub294\uc9c0\ub97c \uc774\ud574\ud569\uc2dc\ub2e4.<\/span>
\n<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

Application Context vs Activity Context<\/h2>\n

Application Context<\/strong>\ub294 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uacfc \uad00\ub828\ub418\uc5b4 \uc788\uace0 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc774 \uc0b4\uc544\uc788\ub294 \ub3d9\uc548 \ubcc0\uacbd\ub418\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \uadf8\ub7ec\ubbc0\ub85c \uc2f1\uae00\ud1a4\uc774\uba70 getApplicationContext()\ub97c \ud1b5\ud574 Activity\uc5d0\uc11c \uc811\uadfc\ud560 \uc218 \uc788\ub294 \uc778\uc2a4\ud134\uc2a4 \uc785\ub2c8\ub2e4. \uc774 Context\ub294 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc758 \uc0dd\uba85\uc8fc\uae30\uc640 \uad00\ub828\ub418\uc5b4\uc788\uae30 \ub54c\ubb38\uc5d0 \ud604\uc7ac Context\uc640 \ubd84\ub9ac\ub41c \uc5b4\ub5a4 Context\uac00 \ud544\uc694\ud558\uac70\ub098, \ud604\uc7ac Activity Scope\uc744 \ubc97\uc5b4\ub09c \uc791\uc5c5\uc744 \ud560\ub54c \ud544\uc694\ud569\ub2c8\ub2e4.\u00a0<\/p>\n

\uc5b4\ub5a4 \uc2f1\uae00\ud1a4 \uac1d\uccb4\ub97c \ub9cc\ub4e4\uc5b4\uc57c\ud558\uace0 \ud574\ub2f9 \uac1d\uccb4\uc5d0 \ud56d\uc0c1 Context\uac00 \ud544\uc694\ud55c \uacbd\uc6b0\uc5d0 Application Context\ub97c \uc804\ub2ec\ud558\uba74 \ub429\ub2c8\ub2e4.<\/p>\n

Application Context\uc5d0 Activity\ub97c \ucc38\uc870\ud558\uac8c \ub418\uba74 Activity\uac00 \ubd80\uc11c\uc9c0\ub354\ub77c\ub3c4 \ucc38\uc870\uac00 \uc720\uc9c0\ub418\ubbc0\ub85c, Activity\uac00 GC(\uac00\ube44\uc9c0 \ucf5c\ub809\ud305)\ub418\uc9c0 \uc54a\uc73c\ubbc0\ub85c \uba54\ubaa8\ub9ac \ub204\uc218\uac00 \ubc1c\uc0dd\ud569\ub2c8\ub2e4.<\/p>\n

\ub2e4\ub978 Context\ubcf4\ub2e4 \uac00\uc7a5 \uc624\ub798 \ubcf4\uc874\ub420\ub9cc\ud55c Context\uac00 \ud544\uc694\ud560\ub54c\ub9cc\u00a0 getApplicationContext()\ub97c \uc0ac\uc6a9\ud569\uc2dc\ub2e4.<\/p>\n

Activity Context<\/strong>\ub294 \uc561\ud2f0\ube44\ud2f0\uc640 \uad00\ub828\uc774 \uc788\uace0, \uc561\ud2f0\ube44\ud2f0\uac00 \ubd80\uc11c\uc9c0\uba74 \ucee8\ud14d\uc2a4\ud2b8\ub3c4 \uac19\uc774 \ubd80\uc11c\uc9d1\ub2c8\ub2e4. \ud558\ub098\uc758 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0\uc11c \uc5ec\ub7ec \uc561\ud2f0\ube44\ud2f0\uac00 \uc874\uc7ac \ud560 \uc218 \uc788\ub294\ub370 \ub54c\ub85c\ub294 \ud2b9\uc815 Activity Context\ub97c \ub2e4\ub8f0\uc77c\uc774 \uc0dd\uae41\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4 \uc0c8\ub85c\uc6b4 \uc561\ud2f0\ube44\ud2f0\ub97c \uc2e4\ud589\ud55c\ub2e4\uba74, \uc561\ud2f0\ube44\ud2f0(\ucee8\ud14d\uc2a4\ud2b8)\uac00 \ud544\uc694\ud569\ub2c8\ub2e4. \uc0c8\ub85c \ub744\uc6cc\uc9c4 \uc561\ud2f0\ube44\ud2f0\ub294 \uc774\uc804 \uc561\ud2f0\ube44\ud2f0\uc640 \uc5f0\uad00\ub418\uc5b4\uc9c4\uccb4\ub85c \uc561\ud2f0\ube44\ud2f0 \uc2a4\ud0dd\uc5d0 \ubcf4\uad00\ub429\ub2c8\ub2e4.\u00a0 Application Context\ub97c \uc774\uc6a9\ud558\uc5ec \uc0c8\ub85c\uc6b4 \uc561\ud2f0\ube44\ud2f0\ub97c \ub744\uc6b8\uc218\ub3c4 \uc788\uc9c0\ub9cc \uadf8\ub7f4\uacbd\uc6b0 \ubc18\ub4dc\uc2dc\u00a0Intent.FLAG_ACTIVITY_NEW_TASK \ud50c\ub798\uadf8\ub97c \uc124\uc815 \ud574\uc8fc\uc5b4\uc57c\ud569\ub2c8\ub2e4.\u00a0<\/p>\n

Context \uc5bb\uae30<\/h3>\n

View.getContext() :<\/strong>
\n\ud604\uc7ac \ubdf0\uac00 \uac00\uc9c0\uace0 \uc788\ub294 context\ub97c \ubc18\ud658\ud558\ub294\ub370, \uc77c\ubc18\uc801\uc73c\ub85c\ub294 Activity\uc5d0\uc11c View\ub97c \ub744\uc6b0\uae30 \ub54c\ubb38\uc5d0 Activity\uc758 Context\uac00 \ub41c\ub2e4.<\/p>\n

Activity.getApplicationContext() :<\/strong>
\n\uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uc804\uccb4\uc758 \ucee8\ud14d\uc2a4\ud2b8\ub97c \ubc18\ud658\ud569\ub2c8\ub2e4. \ud604\uc7ac \uc561\ud2f0\ube44\ud2f0\ubfd0\ub9cc \uc544\ub2c8\ub77c \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc758 \uc218\uba85\uc8fc\uae30\uc640 \uad00\ub828\ub41c \ucee8\ud14d\uc2a4\ud2b8\uac00 \ud544\uc694\ud55c \uacbd\uc6b0 Activity Context\ub300\uc2e0 \uc774 \uac12\uc744 \uc0ac\uc6a9\ud558\uba74 \ub429\ub2c8\ub2e4.<\/p>\n

ContextWrapper.getBaseContext() :\u00a0<\/strong>
\n\ub2e4\ub978 \ucee8\ud14d\uc2a4\ud2b8\ub85c\ubd80\ud130 \uc5b4\ub5a4 \ucee8\ud14d\uc2a4\ud2b8\uc5d0 \uc811\uadfc\ud574\uc57c\ud558\ub294\uacbd\uc6b0\uc5d0 ContextWrapper\ub97c \uc501\ub2c8\ub2e4.\u00a0ContextWrapper \ub0b4\ubd80\uc5d0\uc11c \ucc38\uc870 \ub41c Context\ub294 getBaseContext ()\ub97c \ud1b5\ud574 \uc561\uc138\uc2a4\ub429\ub2c8\ub2e4.<\/p>\n

Context\ub97c \uc798\ubabb \uc4f0\ub294 \uacbd\uc6b0<\/h3>\n

Application Context\ub294 Activity\uac00 \ud558\ub294 \ubaa8\ub4e0 \uac83\uc744 \uc9c0\uc6d0\ud558\ub294 \uc740\ucd1d\uc54c \uac19\uc740 Context\ub294 \uc544\ub2d9\ub2c8\ub2e4. Application Context\ub85c\ub294 \ub300\ubd80\ubd84 GUI(\ud654\uba74, View, \ub4f1) \uc791\uc5c5\uc740 \ud560 \uc218 \uc5c6\uc2b5\ub2c8\ub2e4. Activity \ub9cc \uac00\ub2a5\ud558\uc8e0. \uc608\ub97c \ub4e4\uc5b4 Application Context\ub97c \uc774\uc6a9\ud558\uc5ec AlertDialog\ub97c \ub744\uc6b0\ub824\uace0 \ud55c\ub2e4\uba74 \ub2e4\uc74c\uacfc \uac19\uc740 \uc5d0\ub7ec\ub97c \ubcfc \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n

java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.<\/pre>\n
\uadf8\ub7f0\ub370 Toast\ub294 Application Context\ub97c \uc774\uc6a9\ud574\ub3c4 \uc544\ubb34 \ubb38\uc81c\uac00 \uc5c6\uc774 \uc798 \ub739\ub2c8\ub2e4.Toast\uc758 \uacbd\uc6b0 \ud2b9\uc815 \uc561\ud2f0\ube44\ud2f0\uc5d0 \uc5f0\uad00\ub41c \uc708\ub3c4\uc6b0\uc5d0 \uc18d\ud558\uc9c0 \uc54a\uace0, \uc790\uc2e0\ub9cc\uc758 \uc708\ub3c4\uc6b0\ub97c \uc0dd\uc131\ud558\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4.<\/p>\n
\ub610\ud55c \uc5b4\ub5a0\ud55c Context\ub97c Scope\uc774 \ub354 \ud070 Context\ub098 \uc5b4\ub5a4 \ubb34\uc5b8\uac00\uac00 \ucc38\uc870\ud558\uace0 \uc788\uc73c\uba74 GC \ub418\uc9c0 \uc54a\uace0 \ub9ce\uc740 \uba54\ubaa8\ub9ac\ub97c \uc783\uac8c \ub418\ubbc0\ub85c \uc870\uc2ec\ud558\uc9c0 \uc54a\uc73c\uba74 \uba54\ubaa8\ub9ac \ub204\uc218\uac00 \uc27d\uac8c \ubc1c\uc0dd\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"
Android\uc758 Context\ub780? Application, Service, Activity \ubaa8\ub450 Context\ub97c \uc0c1\uc18d \ud588\ub2e4\ub294 \uc0ac\uc2e4 \uc54c\uace0\uacc4\uc168\ub098\uc694? \uacf5\uc2dd\ubb38\uc11c\uc5d0 \ub098\uc640\uc788\ub294 Context\uc758 \uac1c\uc694\ub97c \ud655\uc778\ud574\ubcf4\uba74, \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \ud658\uacbd\uc5d0 \ub300\ud55c \uc804\uc5ed\uc815\ubcf4\uac00\u00a0\ucee8\ud14d\uc2a4\ud2b8\ub85c \uc5f0\uacb0\ub429\ub2c8\ub2e4. Context\ub294 \uad6c\ud604\uc774 Android \uc2dc\uc2a4\ud15c\uc5d0 \uc758\ud574 \uc81c\uacf5\ub418\ub294 \ucd94\uc0c1 \ud074\ub798\uc2a4\uc785\ub2c8\ub2e4. \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \ubcc4\ub85c \ub9ac\uc18c\uc2a4 \ubc0f \ud074\ub798\uc2a4\uc5d0 \ub300\ud55c \uc811\uadfc\uc740 \ubb3c\ub860 Activity\uc758 \uc2e4\ud589, \ube0c\ub85c\ub4dc \uce90\uc2a4\ud305 \ubc0f Intent\uc218\uc2e0\uacfc \uac19\uc740 \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \ub808\ubca8\uc5d0 \ub300\ud55c \ud638\ucd9c\uc744 \ud5c8\uc6a9\ud569\ub2c8\ub2e4. \uc27d\uac8c […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"inline_featured_image":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"categories":[26],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/1080"}],"collection":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1080"}],"version-history":[{"count":1,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/1080\/revisions"}],"predecessor-version":[{"id":1081,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/1080\/revisions\/1081"}],"wp:attachment":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1080"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1080"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1080"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}