Aşağıdaki hata için yardım edermisiniz

  java.lang.NullPointerException: Attempt to invoke interface method 'java.util.Iterator java.util.List.iterator()' on a null object reference
                      at com.canerdemir1486.emoji.MainActivity$4.onPostExecute(MainActivity.java:148)
                      at com.canerdemir1486.emoji.MainActivity$4.onPostExecute(MainActivity.java:113)
                      at android.os.AsyncTask.finish(AsyncTask.java:667)
                      at android.os.AsyncTask.-wrap1(AsyncTask.java)
                      at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:684)
                      at android.os.Handler.dispatchMessage(Handler.java:102)
                      at android.os.Looper.loop(Looper.java:154)
                      at android.app.ActivityThread.main(ActivityThread.java:6119)
                      at java.lang.reflect.Method.invoke(Native Method)
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Application terminated.