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Attempt to invoke interface method 'java.util.Iterator java.util.List.iterator()' on a null object reference
java.lang.NullPointerException: Attempt to invoke interface method 'java.util.Iterator java.util.List.iterator()' on a null object reference	at com.liulishuo.filedownloader.util.FileDownloadUtils.isDownloaderProcess(FileDownloadUtils.java:226)	at com.liulishuo.filedownloader.FileDownloader.init(FileDownloader.java:83)	at com.liulishuo.filedownloader.FileDownloader.init(FileDownloader.java:59)	at com.ivoox.app.IvooxApplication.onCreate(IvooxApplication.java:75)	at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1035)	at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4638)	at android.app.ActivityThread.access$1500(ActivityThread.java:155)	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1378)	at android.os.Handler.dispatchMessage(Handler.java:102)	at android.os.Looper.loop(Looper.java:135)	at android.app.ActivityThread.main(ActivityThread.java:5343)	at java.lang.reflect.Method.invoke(Method.java)	at java.lang.reflect.Method.invoke(Method.java:372)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700)