你好，遇到这么一个崩溃错误。

[0xFF336699]

出错堆栈

1 java.lang.RuntimeException:Unable to start activity ComponentInfo{com.baobeidaola.fanli/com.cretin.www.cretinautoupdatelibrary.activity.UpdateType12Activity}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String com.cretin.www.cretinautoupdatelibrary.model.DownloadInfo.getUpdateLog()' on a null object reference 2 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2951) 3 ...... 4 Caused by: 5 java.lang.NullPointerException:Attempt to invoke virtual method 'java.lang.String com.cretin.www.cretinautoupdatelibrary.model.DownloadInfo.getUpdateLog()' on a null object reference 6 com.cretin.www.cretinautoupdatelibrary.activity.UpdateType12Activity.setDataAndListener(UpdateType12Activity.java:40) 7 com.cretin.www.cretinautoupdatelibrary.activity.UpdateType12Activity.onCreate(UpdateType12Activity.java:36) 8 android.app.Activity.performCreate(Activity.java:7144) 9 android.app.Activity.performCreate(Activity.java:7135) 10 android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271) 11 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2931) 12 android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3086) 13 android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78) 14 android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) 15 android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) 16 android.app.ActivityThread$H.handleMessage(ActivityThread.java:1816) 17 android.os.Handler.dispatchMessage(Handler.java:106) 18 android.os.Looper.loop(Looper.java:193) 19 android.app.ActivityThread.main(ActivityThread.java:6718) 20 java.lang.reflect.Method.invoke(Native Method)