APK Signing configuration

Steps to create signed apk

Note : this is one time setup for your project. After following below steps, whenever you wants to generate signed apk, you just want to follow step #5 only.

1. Create a file named keystore.properties in the root directory of your project. This file should contain your signing information, as follows:

   storeFile=YOUR_STORE_FILE_LOCATION
   storePassword=YOUR_STORE_PASSWORD
   keyAlias=YOUR_KEY_ALIAS
   keyPassword=YOUR_KEY_PASSWORD

2. In your module's build.gradle file, add code to load your keystore.properties file before the android {} block.

   ...
   
   // Create a variable called keystorePropertiesFile, and initialize it to your
   // keystore.properties file, in the rootProject folder.
   def keystorePropertiesFile = rootProject.file("keystore.properties")
   
   // Initialize a new Properties() object called keystoreProperties.
   def keystoreProperties = new Properties()
   
   // Load your keystore.properties file into the keystoreProperties object.
   keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
   
   android {
   ...
   }

3. You can refer to properties stored in keystoreProperties using the syntax keystoreProperties['propertyName']. Modify the signingConfigs block of your module's build.gradle file to reference the signing information stored in keystoreProperties using this syntax.

   android {
       signingConfigs {
           release {
               keyAlias keystoreProperties['keyAlias']
               keyPassword keystoreProperties['keyPassword']
               storeFile file(keystoreProperties['storeFile'])
               storePassword keystoreProperties['storePassword']
           }
       }
       ...
   }

4. Add signingConfig signingConfigs.release in release{} block as given below to apply configuration to release build

   android {
       ...
       defaultConfig { ... }
       signingConfigs { ... }
       buildTypes {
           release {
               signingConfig signingConfigs.release
               ...
           }
       }
   }

5. Open the Build Variants tool window and ensure that the release build type is selected.