java.lang.RuntimeException: Unable to destroy activity

最新推荐文章于 2024-08-29 09:44:35 发布

原创最新推荐文章于 2024-08-29 09:44:35 发布 · 8.6k 阅读

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本文记录了一个Android应用在销毁MainActivity时遇到的NullPointerException异常详细堆栈跟踪，主要原因是HomePagePresenter中的Subscription对象为null导致的问题。

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09-06 11:15:18.741 8086-8086/com.moreunion.zhenghao E/AndroidRuntime: FATAL EXCEPTION: main
                                                                      Process: com.moreunion.zhenghao, PID: 8086
                                                                      java.lang.RuntimeException: Unable to destroy activity {com.moreunion.zhenghao/com.moreunion.zhenghao.MainActivity}: java.lang.NullPointerException: Attempt to invoke interface method 'boolean rx.Subscription.isUnsubscribed()' on a null object reference
                                                                          at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:4204)
                                                                          at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:4222)
                                                                          at android.app.ActivityThread.-wrap6(ActivityThread.java)
                                                                          at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1539)
                                                                          at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                          at android.os.Looper.loop(Looper.java:154)
                                                                          at android.app.ActivityThread.main(ActivityThread.java:6121)
                                                                          at java.lang.reflect.Method.invoke(Native Method)
                                                                          at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889)
                                                                          at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)
                                                                       Caused by: java.lang.NullPointerException: Attempt to invoke interface method 'boolean rx.Subscription.isUnsubscribed()' on a null object reference
                                                                          at com.moreunion.zhenghao.ui.homepage.HomePagePresenter.closeSubScription(HomePagePresenter.java:50)
                                                                          at com.moreunion.zhenghao.ui.homepage.MainHomePageFragment.onDestroy(MainHomePageFragment.java:133)
                                                                          at android.support.v4.app.Fragment.performDestroy(Fragment.java:2482)
                                                                          at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1472)
                                                                          at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1574)
                                                                          at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1641)
                                                                          at android.support.v4.app.FragmentManagerImpl.dispatchDestroy(FragmentManager.java:3010)
                                                                          at android.support.v4.app.FragmentController.dispatchDestroy(FragmentController.java:271)
                                                                          at android.support.v4.app.FragmentActivity.onDestroy(FragmentActivity.java:342)
                                                                          at android.support.v7.app.AppCompatActivity.onDestroy(AppCompatActivity.java:208)
                                                                          at com.example.yilibrary.base.BaseActivity.onDestroy(BaseActivity.java:52)
                                                                          at com.moreunion.zhenghao.MainActivity.onDestroy(MainActivity.java:316)
                                                                          at android.app.Activity.performDestroy(Activity.java:6884)
                                                                          at android.app.Instrumentation.callActivityOnDestroy(Instrumentation.java:1153)
                                                                          at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:4191)
                                                                          at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:4222)
                                                                          at android.app.ActivityThread.-wrap6(ActivityThread.java)
                                                                          at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1539)
                                                                          at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                          at android.os.Looper.loop(Looper.java:154)
                                                                          at android.app.ActivityThread.main(ActivityThread.java:6121)
                                                                          at java.lang.reflect.Method.invoke(Native Method)
                                                                          at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889)
                                                                          at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)

解决：

 !activity.isDestroyed()