title: Location to put credential file AWS android sdk accessing AWS s3
body: <p>I have a android app that calls s3 to upload and download pics to bucket, I have that working with CognitoCachingCredentialsProvider now, I want to start using access key as the credential, in creating the s3client object. 
  I know I and hard code the AWS_ACCESS_KEY_ID and AWS_SECRET_KEY, put them environment variable or in a file in home directory.</p>
  
  <p>Since I am going to use the AWS_ACCESS_KEY_ID and AWS_SECRET_KEY in my android app, environment variable wont be available. My question is where do I put these keys so that I can use s3client in my android app. Where does file reside if the app were to go to app store.</p>