0-25 16:56:40.247  1248  1326 E AndroidRuntime: FATAL EXCEPTION: AsyncTask #3
10-25 16:56:40.247  1248  1326 E AndroidRuntime: Process: projekt.substratum, PID: 1248
10-25 16:56:40.247  1248  1326 E AndroidRuntime: java.lang.RuntimeException: An error occurred while executing doInBackground()
10-25 16:56:40.247  1248  1326 E AndroidRuntime: 	at android.os.AsyncTask$3.done(AsyncTask.java:309)
10-25 16:56:40.247  1248  1326 E AndroidRuntime: 	at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:354)
10-25 16:56:40.247  1248  1326 E AndroidRuntime: 	at java.util.concurrent.FutureTask.setException(FutureTask.java:223)
10-25 16:56:40.247  1248  1326 E AndroidRuntime: 	at java.util.concurrent.FutureTask.run(FutureTask.java:242)
10-25 16:56:40.247  1248  1326 E AndroidRuntime: 	at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
10-25 16:56:40.247  1248  1326 E AndroidRuntime: 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
10-25 16:56:40.247  1248  1326 E AndroidRuntime: 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
10-25 16:56:40.247  1248  1326 E AndroidRuntime: 	at java.lang.Thread.run(Thread.java:818)
10-25 16:56:40.247  1248  1326 E AndroidRuntime: Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.io.File android.content.Context.getCacheDir()' on a null object reference
10-25 16:56:40.247  1248  1326 E AndroidRuntime: 	at projekt.substratum.tabs.Wallpapers$downloadResources.doInBackground(Wallpapers.java:138)
10-25 16:56:40.247  1248  1326 E AndroidRuntime: 	at projekt.substratum.tabs.Wallpapers$downloadResources.doInBackground(Wallpapers.java:92)
10-25 16:56:40.247  1248  1326 E AndroidRuntime: 	at android.os.AsyncTask$2.call(AsyncTask.java:295)
10-25 16:56:40.247  1248  1326 E AndroidRuntime: 	at java.util.concurrent.FutureTask.run(FutureTask.java:237)
10-25 16:56:40.247  1248  1326 E AndroidRuntime: 	... 4 more