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An error occurred while executing doInBackground()
java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object referenceandroid.content.Context.openFileInput(java.lang.String)' on a null object reference	at com.example.a.dictionary.DictionaryLoader.doInBackground(DictionaryLoader.java:56)	at com.example.a.dictionary.DictionaryLoader.doInBackground(DictionaryLoader.java:23)	at android.os.AsyncTask$2.call(AsyncTask.java:295)	at java.util.concurrent.FutureTask.run(FutureTask.java:237)