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java.lang.IllegalStateException: DriveContents already closed.	at Source)	at Source)	at org.yccheok.demo.Utils.saveToGoogleDrive(	at org.yccheok.demo.SaveFile123Task.doInBackground(	at org.yccheok.demo.SaveFile123Task.doInBackground(	at android.os.AsyncTask$	at	at android.os.AsyncTask$SerialExecutor$	at java.util.concurrent.ThreadPoolExecutor.runWorker(	at java.util.concurrent.ThreadPoolExecutor$	at