Defining Properties in local.properties file in Android Studio

Question

I am building a new app for maps. After the creation of new project, Android studio is expecting the definition of properties in local.properties file , but I don't know how to define a property. So, please help me with this issue. the instruction is as follows.

      TODO: Before you run your application, you need a Google Maps API key.

         To get one, follow the directions here:

            https://developers.google.com/maps/documentation/android-sdk/get-api-key

         Once you have your API key (it starts with "AIza"), define a new property in your
         project's local.properties file (e.g. MAPS_API_KEY=Aiza...), and replace the
         "YOUR_API_KEY" string in this file with "${MAPS_API_KEY}".

Answer 1

After getting your API Key from google do the following:

1. Change the Project navigation type from (Android) to (Project)

2. locate local.properties

3. add your key as in below image (MAPS_API_KEY=AIza ...):

4. Final step add a reference in project manifest:

Answer 2

If you want to define a property with a key sdk.dir then put this it in a local.properties like this

sdk.dir=C:\Program Files (x86)\Android\android-studio\sdk

And for using this properties in other area you can use this code snippet

      Properties properties = new Properties()
      properties.load(project.rootProject.file('local.properties').newDataInputStream())
      def sdkDir = properties.getProperty('sdk.dir')
      def ndkDir = properties.getProperty('ndk.dir')

Use project.rootProject if you are reading the properties file in a sub-project build.gradle otherwise use

properties.load(project.rootProject.file('local.properties').newDataInputStream())