I have implemented a function to download aws s3 files using the following code:
public void credentialsProvider()
{
CognitoCachingCredentialsProvider credentialsProvider = new CognitoCachingCredentialsProvider(
getApplicationContext(), "us-east-2:xxxxxx-xxxxx-xxxxx-xxxx-xxxxxxx", Regions.US_EAST_2
);
setAmazonS3Client(credentialsProvider);
System.out.println("setAmazonS3Client done");
}
public void setAmazonS3Client( CognitoCachingCredentialsProvider credentialsProvider)
{
s3 = new AmazonS3Client(credentialsProvider);
s3.setRegion(Region.getRegion(Regions.US_EAST_2));
}
public void setTransferUtility()
{
transferUtility = new TransferUtility(s3, getApplicationContext());
System.out.println("setTransferUtility done");
}
public void setFileDownload()
{
final String path = this.getFilesDir().getAbsolutePath();
File myFile = new File(path);
TransferObserver transferObserver = transferUtility.download("sample-bucket-001", "images-4.jpeg", myFile);
transferObserverListener(transferObserver);
}
public void transferObserverListener(TransferObserver transferObserver)
{
transferObserver.setTransferListener(new TransferListener() {
@Override
public void onStateChanged(int id, TransferState state) {
System.out.println("onStateChanged: "+ state);
if(state == TransferState.FAILED || state == TransferState.WAITING_FOR_NETWORK){
}
}
@Override
public void onProgressChanged(int id, long bytesCurrent, long bytesTotal) {
int percentage = (int)(bytesCurrent/bytesTotal * 100);
System.out.println("percentage: "+ percentage);
}
@Override
public void onError(int id, Exception ex) {
System.out.println("Error faced: "+ ex.toString());
}
});
}
As I try to execute the following code I get the following error:
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.xxxxxx.xxxxxxxx/com.xxxxxx.xxxxxxxx.Activity}: java.lang.IllegalArgumentException: Invalid file: /data/user/0/com.xxxxxx.xxxxxxxx/files/
I cannot save the file on external storage as I prefer to have them hidden and protected, and deleted in case the app got deleted. I used to use the path to save files on it, that are directly loaded from the internet and no problem there.
Kindly advise on the matter.
2
Answers
I have finally found the solution to the question asked, which simple using a path that is totally new, unused previously, so it can create the folder that where it will store the downloaded picture or file.
I wish Amazon's feedback could be a bit more specific than just 'invalid file'.
The file path supplied to
TransferUtility
needs to include a file name, e.g.: