Jedn\u0105 z rzeczy, kt\u00f3ra mnie bardzo pozytywnie zaskoczy\u0142a w pisaniu aplikacji na Androida jest spos\u00f3b tworzenia layoutu. Chodzi mianowicie o separacje pomi\u0119dzy logik\u0105 aplikacji, a wartw\u0105 prezentacji, kt\u00f3ra jest opisywana w plikach XML.<\/p>\n
Stworzenie aktywno\u015bci z menu rozwijanym z boku mo\u017ce wygl\u0105da\u0107 nast\u0119puj\u0105co.<\/p>\n
activity_main.xml<\/p>\n
<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n<android.support.v4.widget.DrawerLayout xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\r\n xmlns:app=\"http:\/\/schemas.android.com\/apk\/res-auto\"\r\n xmlns:tools=\"http:\/\/schemas.android.com\/tools\"\r\n android:id=\"@+id\/drawer_layout\"\r\n android:layout_width=\"match_parent\"\r\n android:layout_height=\"match_parent\"\r\n android:fitsSystemWindows=\"true\"\r\n tools:openDrawer=\"start\">\r\n\r\n <include\r\n layout=\"@layout\/app_bar_main\"\r\n android:layout_width=\"match_parent\"\r\n android:layout_height=\"match_parent\" \/>\r\n\r\n <android.support.design.widget.NavigationView\r\n android:id=\"@+id\/nav_view\"\r\n android:layout_width=\"wrap_content\"\r\n android:layout_height=\"match_parent\"\r\n android:layout_gravity=\"start\"\r\n android:fitsSystemWindows=\"true\"\r\n app:headerLayout=\"@layout\/nav_header\"\r\n app:menu=\"@menu\/activity_drawer\" \/>\r\n\r\n<\/android.support.v4.widget.DrawerLayout><\/pre>\napp_bar_main.xml<\/p>\n
<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n<android.support.design.widget.CoordinatorLayout xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\r\n xmlns:fab=\"http:\/\/schemas.android.com\/apk\/res-auto\"\r\n xmlns:tools=\"http:\/\/schemas.android.com\/tools\"\r\n android:layout_width=\"match_parent\"\r\n android:layout_height=\"match_parent\"\r\n android:fitsSystemWindows=\"true\"\r\n tools:context=\"pl.lantkowiak.sdm.MainActivity\">\r\n\r\n <android.support.design.widget.AppBarLayout\r\n android:layout_width=\"match_parent\"\r\n android:layout_height=\"wrap_content\"\r\n android:theme=\"@style\/AppTheme.AppBarOverlay\">\r\n\r\n <android.support.v7.widget.Toolbar\r\n android:id=\"@+id\/toolbar\"\r\n android:layout_width=\"match_parent\"\r\n android:layout_height=\"?attr\/actionBarSize\"\r\n android:background=\"?attr\/colorPrimary\"\r\n fab:popupTheme=\"@style\/AppTheme.PopupOverlay\" \/>\r\n\r\n <\/android.support.design.widget.AppBarLayout>\r\n\r\n <include layout=\"@layout\/content_main\" \/>\r\n\r\n<\/android.support.design.widget.CoordinatorLayout><\/pre>\ncontent_main.xml<\/p>\n
<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n<RelativeLayout xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\r\n xmlns:app=\"http:\/\/schemas.android.com\/apk\/res-auto\"\r\n xmlns:tools=\"http:\/\/schemas.android.com\/tools\"\r\n android:layout_width=\"match_parent\"\r\n android:layout_height=\"match_parent\"\r\n android:paddingBottom=\"@dimen\/activity_vertical_margin\"\r\n android:paddingLeft=\"@dimen\/activity_horizontal_margin\"\r\n android:paddingRight=\"@dimen\/activity_horizontal_margin\"\r\n android:paddingTop=\"@dimen\/activity_vertical_margin\"\r\n app:layout_behavior=\"@string\/appbar_scrolling_view_behavior\"\r\n tools:context=\"pl.lantkowiak.sdm.MainActivity\"\r\n tools:showIn=\"@layout\/app_bar_main\">\r\n\r\n...\r\n\r\n<\/RelativeLayout><\/pre>\n<\/p>\n
Wydaj\u0119 mi si\u0119, \u017ce tworzenie element\u00f3w layoutu jest na tyle intuicyjne, \u017ce nie b\u0119d\u0119 szczeg\u00f3\u0142owo opisywa\u0142 co si\u0119 dok\u0142adnie dzieje w powy\u017cszych listingach.<\/p>\n
Jest jednak jednak jedna rzecz, na kt\u00f3r\u0105 chcia\u0142bym zwr\u00f3ci\u0107 uwag\u0119. Wewn\u0105trz\u00a0activity_main.xml umieszczany jest\u00a0app_bar_main.xml, wewn\u0105trz kt\u00f3rego umieszczony jest\u00a0content_main.xml.<\/p>\n
Pierwsze dwa pliki s\u0105 odpowiedzialne za tworzenie aktywno\u015bci z bocznym menu, natomiast trzeci plik –\u00a0content_main.xml – zawiera layout specyficzny dla konkretnego ekranu.<\/p>\n
I teraz pojawia si\u0119 problem, kt\u00f3rego nie uda\u0142o mi si\u0119 rozwi\u0105za\u0107 w elegancki spos\u00f3b.<\/p>\n
Tworz\u0119 drug\u0105 aktywno\u015b\u0107, kt\u00f3ra ma zawiera\u0107 to samo menu, lecz sam ekran ma mie\u0107 inn\u0105 zawarto\u015b\u0107. I teraz, \u017ceby to zrobi\u0107 musz\u0119 skopiowa\u0107 dwa pierwsze layouty odpowiedzialne za menu, zmieni\u0107 nazwy plik\u00f3w i warto\u015bci atrybut\u00f3w w samych plikach. Podej\u015bcie to oczywi\u015bcie dzia\u0142a, lecz generuje sporo plik\u00f3w, kt\u00f3re s\u0105 praktycznie identyczne.<\/p>\n
Rzecz\u0105, kt\u00f3ra by si\u0119 tutaj mog\u0142a przyda\u0107 by\u0142aby mo\u017cliwo\u015b\u0107 podania parametr\u00f3w, kt\u00f3re by\u0142y by przekazywane do za\u0142\u0105czanego layoutu. Mam na my\u015bli rozwi\u0105zanie podobne do tego, kt\u00f3re jest dost\u0119pne np. w JSF.<\/p>\n
Niestety, p\u00f3ki co nie uda\u0142o mi si\u0119 znale\u017a\u0107 rozwi\u0105zania tego problemu i w zwi\u0105zku z tym, p\u00f3ki co zostaje z moim rozwi\u0105zaniem.<\/p>\n","protected":false},"excerpt":{"rendered":"
Jedn\u0105 z rzeczy, kt\u00f3ra mnie bardzo pozytywnie zaskoczy\u0142a w pisaniu aplikacji na Androida jest spos\u00f3b tworzenia layoutu. Chodzi mianowicie o separacje pomi\u0119dzy logik\u0105 aplikacji, a wartw\u0105 prezentacji, kt\u00f3ra…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,6],"tags":[5,3,4],"class_list":["post-73","post","type-post","status-publish","format-standard","hentry","category-daj-sie-poznac","category-simple-document-manager","tag-android","tag-dajsiepoznac","tag-sdm"],"yoast_head":"\n
Tworzenie layoutu w Androidzie - Lukasz Antkowiak's blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.lantkowiak.pl\/index.php\/2016\/04\/13\/tworzenie-layoutu-w-androidzie\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tworzenie layoutu w Androidzie - Lukasz Antkowiak's blog\" \/>\n<meta property=\"og:description\" content=\"Jedn\u0105 z rzeczy, kt\u00f3ra mnie bardzo pozytywnie zaskoczy\u0142a w pisaniu aplikacji na Androida jest spos\u00f3b tworzenia layoutu. Chodzi mianowicie o separacje pomi\u0119dzy logik\u0105 aplikacji, a wartw\u0105 prezentacji, kt\u00f3ra...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blog.lantkowiak.pl\/index.php\/2016\/04\/13\/tworzenie-layoutu-w-androidzie\/\" \/>\n<meta property=\"og:site_name\" content=\"Lukasz Antkowiak's blog\" \/>\n<meta property=\"article:published_time\" content=\"2016-04-13T00:53:42+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2016-04-12T23:05:30+00:00\" \/>\n<meta name=\"author\" content=\"\u0141ukasz Antkowiak\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Napisane przez\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u0141ukasz Antkowiak\" \/>\n\t<meta name=\"twitter:label2\" content=\"Szacowany czas czytania\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minuty\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blog.lantkowiak.pl\/index.php\/2016\/04\/13\/tworzenie-layoutu-w-androidzie\/\",\"url\":\"https:\/\/blog.lantkowiak.pl\/index.php\/2016\/04\/13\/tworzenie-layoutu-w-androidzie\/\",\"name\":\"Tworzenie layoutu w Androidzie - Lukasz Antkowiak's blog\",\"isPartOf\":{\"@id\":\"https:\/\/blog.lantkowiak.pl\/#website\"},\"datePublished\":\"2016-04-13T00:53:42+00:00\",\"dateModified\":\"2016-04-12T23:05:30+00:00\",\"author\":{\"@id\":\"https:\/\/blog.lantkowiak.pl\/#\/schema\/person\/009bfc4db220c225786c59b1748ba1e6\"},\"breadcrumb\":{\"@id\":\"https:\/\/blog.lantkowiak.pl\/index.php\/2016\/04\/13\/tworzenie-layoutu-w-androidzie\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/blog.lantkowiak.pl\/index.php\/2016\/04\/13\/tworzenie-layoutu-w-androidzie\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/blog.lantkowiak.pl\/index.php\/2016\/04\/13\/tworzenie-layoutu-w-androidzie\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Strona g\u0142\u00f3wna\",\"item\":\"https:\/\/blog.lantkowiak.pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Tworzenie layoutu w Androidzie\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/blog.lantkowiak.pl\/#website\",\"url\":\"https:\/\/blog.lantkowiak.pl\/\",\"name\":\"Lukasz Antkowiak's blog\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/blog.lantkowiak.pl\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pl-PL\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/blog.lantkowiak.pl\/#\/schema\/person\/009bfc4db220c225786c59b1748ba1e6\",\"name\":\"\u0141ukasz Antkowiak\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pl-PL\",\"@id\":\"https:\/\/blog.lantkowiak.pl\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/e18e2bfe319da9b5757cf7f7ae1bfecf?s=96&d=monsterid&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/e18e2bfe319da9b5757cf7f7ae1bfecf?s=96&d=monsterid&r=g\",\"caption\":\"\u0141ukasz Antkowiak\"},\"description\":\"dd\",\"url\":\"https:\/\/blog.lantkowiak.pl\/index.php\/author\/antek\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Tworzenie layoutu w Androidzie - Lukasz Antkowiak's blog","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/blog.lantkowiak.pl\/index.php\/2016\/04\/13\/tworzenie-layoutu-w-androidzie\/","og_locale":"pl_PL","og_type":"article","og_title":"Tworzenie layoutu w Androidzie - Lukasz Antkowiak's blog","og_description":"Jedn\u0105 z rzeczy, kt\u00f3ra mnie bardzo pozytywnie zaskoczy\u0142a w pisaniu aplikacji na Androida jest spos\u00f3b tworzenia layoutu. Chodzi mianowicie o separacje pomi\u0119dzy logik\u0105 aplikacji, a wartw\u0105 prezentacji, kt\u00f3ra...","og_url":"https:\/\/blog.lantkowiak.pl\/index.php\/2016\/04\/13\/tworzenie-layoutu-w-androidzie\/","og_site_name":"Lukasz Antkowiak's blog","article_published_time":"2016-04-13T00:53:42+00:00","article_modified_time":"2016-04-12T23:05:30+00:00","author":"\u0141ukasz Antkowiak","twitter_card":"summary_large_image","twitter_misc":{"Napisane przez":"\u0141ukasz Antkowiak","Szacowany czas czytania":"3 minuty"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/blog.lantkowiak.pl\/index.php\/2016\/04\/13\/tworzenie-layoutu-w-androidzie\/","url":"https:\/\/blog.lantkowiak.pl\/index.php\/2016\/04\/13\/tworzenie-layoutu-w-androidzie\/","name":"Tworzenie layoutu w Androidzie - Lukasz Antkowiak's blog","isPartOf":{"@id":"https:\/\/blog.lantkowiak.pl\/#website"},"datePublished":"2016-04-13T00:53:42+00:00","dateModified":"2016-04-12T23:05:30+00:00","author":{"@id":"https:\/\/blog.lantkowiak.pl\/#\/schema\/person\/009bfc4db220c225786c59b1748ba1e6"},"breadcrumb":{"@id":"https:\/\/blog.lantkowiak.pl\/index.php\/2016\/04\/13\/tworzenie-layoutu-w-androidzie\/#breadcrumb"},"inLanguage":"pl-PL","potentialAction":[{"@type":"ReadAction","target":["https:\/\/blog.lantkowiak.pl\/index.php\/2016\/04\/13\/tworzenie-layoutu-w-androidzie\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/blog.lantkowiak.pl\/index.php\/2016\/04\/13\/tworzenie-layoutu-w-androidzie\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Strona g\u0142\u00f3wna","item":"https:\/\/blog.lantkowiak.pl\/"},{"@type":"ListItem","position":2,"name":"Tworzenie layoutu w Androidzie"}]},{"@type":"WebSite","@id":"https:\/\/blog.lantkowiak.pl\/#website","url":"https:\/\/blog.lantkowiak.pl\/","name":"Lukasz Antkowiak's blog","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/blog.lantkowiak.pl\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"pl-PL"},{"@type":"Person","@id":"https:\/\/blog.lantkowiak.pl\/#\/schema\/person\/009bfc4db220c225786c59b1748ba1e6","name":"\u0141ukasz Antkowiak","image":{"@type":"ImageObject","inLanguage":"pl-PL","@id":"https:\/\/blog.lantkowiak.pl\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/e18e2bfe319da9b5757cf7f7ae1bfecf?s=96&d=monsterid&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/e18e2bfe319da9b5757cf7f7ae1bfecf?s=96&d=monsterid&r=g","caption":"\u0141ukasz Antkowiak"},"description":"dd","url":"https:\/\/blog.lantkowiak.pl\/index.php\/author\/antek\/"}]}},"_links":{"self":[{"href":"https:\/\/blog.lantkowiak.pl\/index.php\/wp-json\/wp\/v2\/posts\/73","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.lantkowiak.pl\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.lantkowiak.pl\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.lantkowiak.pl\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.lantkowiak.pl\/index.php\/wp-json\/wp\/v2\/comments?post=73"}],"version-history":[{"count":5,"href":"https:\/\/blog.lantkowiak.pl\/index.php\/wp-json\/wp\/v2\/posts\/73\/revisions"}],"predecessor-version":[{"id":78,"href":"https:\/\/blog.lantkowiak.pl\/index.php\/wp-json\/wp\/v2\/posts\/73\/revisions\/78"}],"wp:attachment":[{"href":"https:\/\/blog.lantkowiak.pl\/index.php\/wp-json\/wp\/v2\/media?parent=73"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.lantkowiak.pl\/index.php\/wp-json\/wp\/v2\/categories?post=73"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.lantkowiak.pl\/index.php\/wp-json\/wp\/v2\/tags?post=73"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}