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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