Finish activity when onPostExecute is called (in AsyncTask) - android-asynctask

Question

I use the GMS Drive sample demo.
I want to select a file (with Drive dialog open file), download the file, then finish the activity.
My problem is if I use finish() in the onActivityResult, I cannot get the result in my main activity, if I use finish() in the onPostExecute, the dialog is not closed, and I need to press "Cancel" to return to my main activity (with the result). I would like to return without pressing "cancel" button...
I use the RetrieveContentsActivity and PickFileWithOpenerActivity from the demo.
Here is my code :
public class RestoreActivity extends DriveActivity {
private static final int REQUEST_CODE_OPENER = 1;
#Override
public void onConnected(Bundle connectionHint) {
super.onConnected(connectionHint);
IntentSender intentSender = Drive.DriveApi
.newOpenFileActivityBuilder()
.setSelectionFilter(Filters.contains(SearchableField.TITLE, "settings"))
.build(getGoogleApiClient());
try {
startIntentSenderForResult(intentSender, REQUEST_CODE_OPENER, null, 0, 0, 0);
} catch (IntentSender.SendIntentException e) {
Log.w(TAG, "Unable to send intent", e);
}
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case REQUEST_CODE_OPENER:
if (resultCode == RESULT_OK) {
DriveId driveId = data.getParcelableExtra(OpenFileActivityBuilder.EXTRA_RESPONSE_DRIVE_ID);
new RetrieveDriveFileContentsAsyncTask(RestoreActivity.this).execute(driveId);
}
finish(); // if I put finish() here, I cannot get the result in onActivityResult (main activity)
break;
default:
super.onActivityResult(requestCode, resultCode, data);
}
}
final private class RetrieveDriveFileContentsAsyncTask extends ApiClientAsyncTask<DriveId, Boolean, String> {
public RetrieveDriveFileContentsAsyncTask(Context context) {
super(context);
}
#Override
protected String doInBackgroundConnected(DriveId... params) {
String contents = null;
DriveFile file = Drive.DriveApi.getFile(getGoogleApiClient(), params[0]);
DriveApi.DriveContentsResult driveContentsResult = file.open(getGoogleApiClient(), DriveFile.MODE_READ_ONLY, null).await();
if (!driveContentsResult.getStatus().isSuccess()) {
return null;
}
DriveContents driveContents = driveContentsResult.getDriveContents();
BufferedReader reader = new BufferedReader(
new InputStreamReader(driveContents.getInputStream()));
StringBuilder builder = new StringBuilder();
String line;
try {
while ((line = reader.readLine()) != null) {
builder.append(line);
}
contents = builder.toString();
} catch (IOException e) {
Log.e(TAG, "IOException while reading from the stream " + e.toString());
}
driveContents.discard(getGoogleApiClient());
return contents;
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
Intent returnIntent = new Intent();
returnIntent.putExtra("settings",result);
if (result == null) {
Log.w(TAG, "Error");
setResult(RESULT_CANCELED,returnIntent);
} else {
Log.i(TAG, "OK");
setResult(RESULT_OK,returnIntent);
}
// if I put finish() here nothing happens, and dialog is still opened till I press "Cancel" button
}
}
}
How can I return to the main activity after onPostExecute and stop intent DriveApi ?
Thanks

Answer 1

I found a solution that I don't like : make it in 2 steps.
pick the file using the PickFileActivity from demo, return the driveId by declaring it public in MainActivity (public static DriveId driveId) and changing code like this :
MainActivity.driveId = data.getParcelableExtra(OpenFileActivityBuilder.EXTRA_RESPONSE_DRIVE_ID);
move the AsyncTask in my MainActivity.
If someone find another solution ?