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Notícias Cursos Contato Doação
Disponível no Google Play

Preparando seu aplicativo para a Play Store!

Nesse vídeo eu demonstro os passos para compilar um APK que pode ser colocado na Google Play Store! Vamos utilizar o buildozer para gerar o APK, criar chaves criptográficas e assinar o APK em conformidade com as regras da Google Play Store.

Clique na imagem para assistir a aula no YouTube.

A Google Play Store exige que seu APK seja criado segundo alguns critérios. Os Apps desenvolvidos em Kivy podem ser facilmente adequados as essas exigências e você vai aprender a fazer isso agora!

O primeiro passo é entender que o APK pode ser compilado em 2 modos: Debug e Release. O Debug é aquele que já fizemos nas séries passadas utilizando o buildozer: 

$ buildozer -v android debug deploy run

Esse código porém, compila o APK em modo Debug, que não é adequado para publicação. Para compilar em modo Release, basta substituir o 'debug' por 'release'. Mas calma! Não é assim tão fácil, infelizmente.

Altere a versão no buildozer.spec, e as informações do seu app. Cada atualização deve ter uma versão diferente e maior que a antiga.

A Google Play Store exige que seu APK seja "assinado" digitalmente, para garantir a sua procedência. Para isso, vamos precisar criar uma chave criptográfica. Com a instalação do buildozer, temos acesso à um comando chamado 'keytool', que serve exatamente para isso!

Então, para criar uma chave criptográfica, nós vamos digitar o seguinte comando: 

$ keytool -genkey -v -keystore nomeDaChave.jks -keyalg RSA -keysize 2048 -validity 10000 -alias nomeDoAlias

Dê um nome para o arquivo da sua chave alterando 'nomeDaChave' para o que desejar. Altere também o nome do alias que desejar pelo 'nomeDoAlias'.

Depois você terá que responder algumas perguntas e definir uma senha.

Guarde muito bem essa chave, o alias e o password! Toda vez que você for atualizar seu aplicativo, você terá que assinar seu APK novo com essa chave.

Agora precisamos definir algumas variaveis no sistema, para que o buildozer encontre essa chave e coloque a senha.

Em um terminal (bash do Linux), exporte as seguintes variáveis: 

$ export P4A_RELEASE_KEYSTORE="caminho/para/nomeDaChave.jks"

$ export P4A_RELEASE_KEYSTORE_PASSWD="suaSenhaInquebrável"

$ export P4A_RELEASE_KEYALIAS_PASSWD="suaSenhaDoAliasInquebrável" # pode ser a mesma da de cima

$ export P4A_RELEASE_KEYALIAS="nomeDoAlias"

Agora é só compilar com: 

$ buildozer -v android release

E pronto! Seu App está pronto para publicação na Google Play Store!