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An error occured while executing doInBackground()
java.lang.NullPointerException: 	at android.graphics.Bitmap.compress(Bitmap.java:1028)	at com.example.bogna.hogmessanger.PutBitmap.doInBackground(PutBitmap.java:45)	at com.example.bogna.hogmessanger.PutBitmap.doInBackground(PutBitmap.java:17)	at android.os.AsyncTask$2.call(AsyncTask.java:292)	at java.util.concurrent.FutureTask.run(FutureTask.java:237)