E Androidruntime Fatal Exception Asynctask 1 . RuntimeException: An error occurred while executing doInBackground. at android.os. RuntimeException: An error occurred while executing doInBackground() at android.os. Why does my Android app crash with NoClassDefFoundError ... (Jeremy Holloway) RuntimeException: An error occured while executing doInBackground() at android.os. Vi uma possível solução no forum para utilizar optInt(variavel) mas não obtive sucesso. Comme cela, je dois dire qu'il n'est pas facile de savoir quelle ligne pose. RuntimeException: Unable to instantiate activity ComponentInfo{com.s.android.test/com.s.android.test. I am trying to use AsyncTask (Learning) ,,Getting Fatal Exception error This is the call. Caused by: java.lang.IllegalAccessError: tried to access ... android - JSON string unable to be converted into JSON ... ...