{"id":379,"date":"2019-08-08T18:25:05","date_gmt":"2019-08-08T18:25:05","guid":{"rendered":"https:\/\/micheladrianomedeiros.com.br\/blog\/?p=379"},"modified":"2019-08-08T18:25:08","modified_gmt":"2019-08-08T18:25:08","slug":"kotlin-para-android-2","status":"publish","type":"post","link":"https:\/\/micheladrianomedeiros.com.br\/blog\/kotlin-para-android-2\/","title":{"rendered":"Kotlin para Android #2"},"content":{"rendered":"\n

Continuando com o HelloKotlin\nApp<\/strong><\/p>\n\n\n\n

Vamos trabalhar com o arquivo activity_main.xml\nque \u00e9 a interface que o usu\u00e1rio ir\u00e1 ver no aplicativo. Escolha a aba Text e\nvamos digitar o seguinte:<\/p>\n\n\n\n

<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<androidx.constraintlayout.widget.ConstraintLayout\n        xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\n        xmlns:tools=\"http:\/\/schemas.android.com\/tools\"\n        xmlns:app=\"http:\/\/schemas.android.com\/apk\/res-auto\"\n        android:layout_width=\"match_parent\"\n        android:layout_height=\"match_parent\"\n        tools:context=\".MainActivity\">\n\n  <LinearLayout\n          android:layout_width=\"match_parent\"\n          android:layout_height=\"match_parent\"\n          android:orientation=\"vertical\"\n          app:layout_constraintBottom_toBottomOf=\"parent\"\n          app:layout_constraintLeft_toLeftOf=\"parent\"\n          app:layout_constraintRight_toRightOf=\"parent\"\n          app:layout_constraintTop_toTopOf=\"parent\"\n  >\n\n      <Button\n              android:layout_width=\"wrap_content\"\n              android:layout_height=\"wrap_content\"\n              android:text=\"Vai\"\n              android:onClick=\"vai\"\n      \/>\n\n      <EditText\n              android:id=\"@+id\/text\"\n              android:layout_width=\"wrap_content\"\n              android:layout_height=\"wrap_content\"\n              android:inputType=\"textMultiLine\"\n              android:ems=\"10\"\n              tools:layout_height=\"286dp\"\n              tools:layout_width=\"84dp\"\n      \/>\n\n  <\/LinearLayout>\n\n<\/androidx.constraintlayout.widget.ConstraintLayout>\n<\/code><\/pre>\n\n\n\n
Agora vamos fazer as modifica\u00e7\u00f5es\nno arquivo MainAcitivity.kt, digite o seguinte:<\/p>\n\n\n\n
package br.com.micheladrianomedeiros.hellokotlin\n\nimport androidx.appcompat.app.AppCompatActivity\nimport android.os.Bundle\nimport android.view.View\nimport kotlinx.android.synthetic.main.activity_main.*\nimport java.util.*\n\nclass MainActivity : AppCompatActivity() {\n\n    override fun onCreate(savedInstanceState: Bundle?) {\n        super.onCreate(savedInstanceState)\n        setContentView(R.layout.activity_main)\n    }\n\n    fun vai(v: View){\n        text.setText(\"Hello Kotlin!\"+\"\\n\"+ Date())\n    }\n}<\/code><\/pre>\n\n\n\n
Agora vamos executar para ver\no que acontece. Eu executei o sistema com a API 27, tentei com a 15 e n\u00e3o\nfuncionou. Por qu\u00ea? N\u00e3o sei.<\/p>\n\n\n\n
\"\"<\/figure><\/div>\n\n\n\n
Clique no bot\u00e3o VAI.<\/p>\n\n\n\n
\"\"<\/figure><\/div>\n\n\n\n
A\u00ed sim, rodamos nossa primeira aplica\u00e7\u00e3o Kotlin.<\/p>\n\n\n\n
Fonte livro: Learn Kotlin for Android Development: The Next Generation Language for Modern Android Apps Programming <\/p>\n\n\n\n
>>> https:\/\/amzn.to\/2Nppby9<\/a>  <\/p>\n\n\n\n
\ud83d\ude0d CRIANDO APLICATIVOS DO ZERO E F\u00c1CIL<\/strong> <\/p>\n\n\n\n
>>> http:\/\/bit.ly\/androidblack<\/a>  <\/p>\n\n\n\n
\ud83d\ude0d Google Android. Aprenda A Criar Aplica\u00e7\u00f5es Para Dispositivos M\u00f3veis Com O Android SDK <\/strong><\/p>\n\n\n\n
https:\/\/amzn.to\/2NmqVbi<\/a><\/p>\n\n\n\n
#android #kotlin<\/p>\n\n\n","protected":false},"excerpt":{"rendered":"
Continuando com o HelloKotlin App Vamos trabalhar com o arquivo activity_main.xml que \u00e9 a interface que o usu\u00e1rio ir\u00e1 ver no aplicativo. Escolha a aba Text e vamos digitar o seguinte: Agora vamos fazer as modifica\u00e7\u00f5es no arquivo MainAcitivity.kt, digite o seguinte: Agora vamos executar para ver o que acontece. Eu executei o sistema com […]<\/p>\n","protected":false},"author":1,"featured_media":130,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[34,35],"tags":[36,37],"class_list":["post-379","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-android","category-kotlin","tag-android","tag-kotlin"],"_links":{"self":[{"href":"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-json\/wp\/v2\/posts\/379","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=379"}],"version-history":[{"count":2,"href":"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-json\/wp\/v2\/posts\/379\/revisions"}],"predecessor-version":[{"id":383,"href":"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-json\/wp\/v2\/posts\/379\/revisions\/383"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-json\/wp\/v2\/media\/130"}],"wp:attachment":[{"href":"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-json\/wp\/v2\/media?parent=379"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-json\/wp\/v2\/categories?post=379"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/micheladrianomedeiros.com.br\/blog\/wp-json\/wp\/v2\/tags?post=379"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}