{"id":308,"date":"2019-07-27T02:17:18","date_gmt":"2019-07-27T02:17:18","guid":{"rendered":"https:\/\/micheladrianomedeiros.com.br\/blog\/?p=308"},"modified":"2019-07-27T02:17:21","modified_gmt":"2019-07-27T02:17:21","slug":"android-3","status":"publish","type":"post","link":"https:\/\/micheladrianomedeiros.com.br\/blog\/android-3\/","title":{"rendered":"Android #3"},"content":{"rendered":"\n<p class=\"has-text-color has-vivid-cyan-blue-color wp-block-paragraph\"><strong>Instalando o Android Studio<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para instalar o Android Studio n\u00e3o tem\nsegredo, veja o come\u00e7o deste artigo para fazer a instala\u00e7\u00e3o <a href=\"https:\/\/micheladrianomedeiros.com.br\/blog\/kotlin-para-android\/\">https:\/\/micheladrianomedeiros.com.br\/blog\/kotlin-para-android\/<\/a>\ne siga o tutorial at\u00e9 chegar nesta tela.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"881\" height=\"504\" src=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/1-10.png\" alt=\"\" class=\"wp-image-309\" srcset=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/1-10.png 881w, https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/1-10-300x172.png 300w, https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/1-10-768x439.png 768w\" sizes=\"auto, (max-width: 881px) 100vw, 881px\" \/><\/figure><\/div>\n\n\n\n<p class=\"has-text-color has-vivid-cyan-blue-color wp-block-paragraph\"><strong>Criando um Projeto<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Depois\nde escolher o Empty Activity clique em Next.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Agora\ndeixa nesta configura\u00e7\u00e3o.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"679\" height=\"456\" src=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/2-6.png\" alt=\"\" class=\"wp-image-310\" srcset=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/2-6.png 679w, https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/2-6-300x201.png 300w\" sizes=\"auto, (max-width: 679px) 100vw, 679px\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">O Name e o Save location voc\u00ea\npode mudar para qual quiser. Clique em Finish.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vamos abrir o arquivo activity_main.xml\nno modo Text. Ele j\u00e1 vem configurado para mostrar um Hello World na tela.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"419\" src=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/3-4-1024x419.png\" alt=\"\" class=\"wp-image-311\" srcset=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/3-4-1024x419.png 1024w, https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/3-4-300x123.png 300w, https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/3-4-768x314.png 768w, https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/3-4.png 1043w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Nosso aplicativo vai ter um\ntexto para mostrar o nome do aplicativo, um local para digitar o valor, um\nbot\u00e3o para fazer o c\u00e1lculo e mais um texto para mostrar o resultado. Vamos\nfazer as modifica\u00e7\u00f5es para obter esta tela.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A primeira coisa \u00e9 mudar o\ntipo de layout, mudei o ConstraintLayout para LinearLayout. Mudei os atributos\ndo layout_width e layout_height para fill_parent. E adicionei o orientation\nvertical. <\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"579\" height=\"402\" src=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/4-4.png\" alt=\"\" class=\"wp-image-312\" srcset=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/4-4.png 579w, https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/4-4-300x208.png 300w\" sizes=\"auto, (max-width: 579px) 100vw, 579px\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">O TextView do Hello World voc\u00ea\npode apagar. O c\u00f3digo deve ficar assim:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"417\" height=\"440\" src=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/5-4.png\" alt=\"\" class=\"wp-image-313\" srcset=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/5-4.png 417w, https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/5-4-284x300.png 284w\" sizes=\"auto, (max-width: 417px) 100vw, 417px\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Agora no arquivo\nMainActivity.java vamos digitar o comportamento desta calculadora.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Primeiro temos que identificar\nos elementos que iremos utilizar que adicionamos no activity_main.xml, todos\nestes elementos est\u00e3o identificados com um id, por exemplo, @+id\/answer.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para colocar os comportamentos\ndestes elementos temos que identific\u00e1-los no arquivo MainActivity.java, e na\nfigura voc\u00ea pode ver como \u00e9 feito isto.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"577\" height=\"322\" src=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/6-4.png\" alt=\"\" class=\"wp-image-314\" srcset=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/6-4.png 577w, https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/6-4-300x167.png 300w\" sizes=\"auto, (max-width: 577px) 100vw, 577px\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Temos que adicionar um\n\u201cescutador\u201d no bot\u00e3o calcular gorjeta. O listener permite sabermos quando o\nusu\u00e1rio clicou no bot\u00e3o.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"511\" height=\"317\" src=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/7-3.png\" alt=\"\" class=\"wp-image-315\" srcset=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/7-3.png 511w, https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/7-3-300x186.png 300w\" sizes=\"auto, (max-width: 511px) 100vw, 511px\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">O c\u00f3digo a seguir \u00e9 o que deve\nser colocado dentro do m\u00e9todo onClick.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"547\" height=\"540\" src=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/8-2.png\" alt=\"\" class=\"wp-image-316\" srcset=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/8-2.png 547w, https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/8-2-300x296.png 300w\" sizes=\"auto, (max-width: 547px) 100vw, 547px\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Vamos executar o programa. Pressione\no F6 ou clique no bot\u00e3o de player.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"621\" height=\"474\" src=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/9-2.png\" alt=\"\" class=\"wp-image-317\" srcset=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/9-2.png 621w, https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/9-2-300x229.png 300w\" sizes=\"auto, (max-width: 621px) 100vw, 621px\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><a>Provavelmente\nvoc\u00ea n\u00e3o vai ter nenhum devices aparecendo. Ent\u00e3o, voc\u00ea ter\u00e1 que criar <\/a>um,\nclicando no bot\u00e3o Create New Virtual Device, os passos para criar um device est\u00e1\nno artigo que eu passei anteriormente &nbsp;<a href=\"https:\/\/micheladrianomedeiros.com.br\/blog\/kotlin-para-android\/\">https:\/\/micheladrianomedeiros.com.br\/blog\/kotlin-para-android\/<\/a>.\n<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">No meu caso eu criei um com\nAPI 15 porque se voc\u00ea n\u00e3o lembra no come\u00e7o escolhemos esta API para criar o\nprojeto, por\u00e9m por algum motivo no meu computador o emulador com a API 15 n\u00e3o\nfuncionou. Ent\u00e3o, criei um &nbsp;device com a\nAPI 19. Voc\u00ea pode criar com qualquer vers\u00e3o da API, mas recomendo tentar com a\n15 ou a 19 como eu fiz.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A\u00ed est\u00e1 nosso programa de c\u00e1lculo\nde gorjeta rodando.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"275\" height=\"482\" src=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/10-2.png\" alt=\"\" class=\"wp-image-318\" srcset=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/10-2.png 275w, https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/10-2-171x300.png 171w\" sizes=\"auto, (max-width: 275px) 100vw, 275px\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">No console podemos ver alguns resultados\nque colocamos no c\u00f3digo com a anota\u00e7\u00e3o Log.i.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"353\" height=\"72\" src=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/11-1.png\" alt=\"\" class=\"wp-image-319\" srcset=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/11-1.png 353w, https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/11-1-300x61.png 300w\" sizes=\"auto, (max-width: 353px) 100vw, 353px\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Veja que nosso programa mostra\no valor total da refei\u00e7\u00e3o, que \u00e9 o valor da refei\u00e7\u00e3o mais 20% sobre o valor da\nrefei\u00e7\u00e3o.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"273\" height=\"146\" src=\"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-content\/uploads\/2019\/07\/12-1.png\" alt=\"\" class=\"wp-image-320\"\/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">E pronto, fizemos nosso primeiro programa. <\/p>\n\n\n\n<p class=\"has-text-color has-background has-very-light-gray-color has-vivid-cyan-blue-background-color wp-block-paragraph\">&nbsp;Google&nbsp;Android. Aprenda A Criar Aplica\u00e7\u00f5es Para Dispositivos M\u00f3veis Com O&nbsp;Android&nbsp;SDK&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/amzn.to\/2NmqVbi\">https:\/\/amzn.to\/2NmqVbi<\/a><\/p>\n\n\n\n<p class=\"has-text-color has-background has-very-light-gray-color has-vivid-cyan-blue-background-color wp-block-paragraph\">&nbsp;<strong>CRIANDO APLICATIVOS DO ZERO E F\u00c1CIL<\/strong>&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">>>>\u00a0<a rel=\"noreferrer noopener\" href=\"http:\/\/bit.ly\/androidblack\" target=\"_blank\">http:\/\/bit.ly\/androidblack<\/a>\u00a0\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">#android<\/p>\n\n\n","protected":false},"excerpt":{"rendered":"<p>Instalando o Android Studio Para instalar o Android Studio n\u00e3o tem segredo, veja o come\u00e7o deste artigo para fazer a instala\u00e7\u00e3o https:\/\/micheladrianomedeiros.com.br\/blog\/kotlin-para-android\/ e siga o tutorial at\u00e9 chegar nesta tela. Criando um Projeto Depois de escolher o Empty Activity clique em Next. Agora deixa nesta configura\u00e7\u00e3o. O Name e o Save location voc\u00ea pode mudar [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":215,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[34],"tags":[36],"class_list":["post-308","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-android","tag-android"],"_links":{"self":[{"href":"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-json\/wp\/v2\/posts\/308","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-json\/wp\/v2\/comments?post=308"}],"version-history":[{"count":2,"href":"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-json\/wp\/v2\/posts\/308\/revisions"}],"predecessor-version":[{"id":322,"href":"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-json\/wp\/v2\/posts\/308\/revisions\/322"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-json\/wp\/v2\/media\/215"}],"wp:attachment":[{"href":"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-json\/wp\/v2\/media?parent=308"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-json\/wp\/v2\/categories?post=308"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-json\/wp\/v2\/tags?post=308"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}