Android应用程式在startActivity时当机 [英] Android app crashing on startActivity

问题描述

我有一个ListView，当按下一行时，我想开始一个新的活动。列表视图在选项卡的片段显示中。我用来显示活动的代码是：

I have a ListView and when a row is pressed I want to start a new activity. The list view is in a Fragment display in a tab. The code I'm using to display the activity is:

    @Override
public void onListItemClick(ListView l, View v, int position, long id) {
    Intent intent = new Intent(mView.getContext(), SessionActivity.class);
    startActivity(intent);
}

运行代码时，会显示新活动，但应用程序立即崩溃。这是我在日志中得到的：

When I run the code the new activity is displayed but the app immediately crashes. This is what I get in the log:

05-11 15:05:08.504: I/Process(1128): Sending signal. PID: 1128 SIG: 9

05-11 15:10:47.224: I/ActionBarSherlock(1178): Registering ActionBarSherlockCompat with qualifier @com.actionbarsherlock.ActionBarSherlock$Implementation(api=7, dpi=-1)
05-11 15:10:47.224: I/ActionBarSherlock(1178): Registering ActionBarSherlockNative with qualifier @com.actionbarsherlock.ActionBarSherlock$Implementation(api=14, dpi=-1)
05-11 15:10:47.234: I/ActionBarSherlock(1178): Using implementation: ActionBarSherlockNative
05-11 15:10:47.234: D/ActionBarSherlock(1178): [<ctor>] activity: com.hotrodsoftware.vgb.MainActivity@417808b0, flags: 1
05-11 15:10:47.234: D/ActionBarSherlock(1178): [setContentView] view: android.support.v4.view.ViewPager@417835d0
05-11 15:10:47.234: D/ActionBarSherlock(1178): [setContentView] view: android.support.v4.view.ViewPager@417835d0, params: android.view.ViewGroup$LayoutParams@4178d4c0
05-11 15:10:47.315: D/ActionBarSherlock(1178): [getActionBar]
05-11 15:10:47.324: D/ActionBarSherlock(1178): [getActionBar]
05-11 15:10:47.344: V/21st Polling:(1178): clicked
05-11 15:10:47.603: D/SherlockFragmentActivity(1178): [onCreatePanelMenu] featureId: 0, menu: com.android.internal.view.menu.MenuBuilder@417c37b8
05-11 15:10:47.613: D/dalvikvm(1178): GC_CONCURRENT freed 176K, 2% free 14334K/14599K, paused 6ms+5ms
05-11 15:10:47.613: D/ActionBarSherlock(1178): [dispatchCreateOptionsMenu] menu: com.android.internal.view.menu.MenuBuilder@417c37b8
05-11 15:10:47.633: D/ActionBarSherlock(1178): [callbackCreateOptionsMenu] menu: com.actionbarsherlock.internal.view.menu.MenuWrapper@417bd5f8
05-11 15:10:47.633: D/Watson(1178): [onCreatePanelMenu] featureId: 0, menu: com.actionbarsherlock.internal.view.menu.MenuWrapper@417bd5f8
05-11 15:10:47.633: D/Watson(1178): [onCreatePanelMenu] activity create result: true
05-11 15:10:47.633: D/SherlockFragmentActivity(1178): [getSupportMenuInflater]
05-11 15:10:47.633: D/ActionBarSherlock(1178): [getMenuInflater]
05-11 15:10:47.633: D/ActionBarSherlock(1178): [getActionBar]
05-11 15:10:47.633: D/Watson(1178): [onCreatePanelMenu] fragments create result: false
05-11 15:10:47.633: D/Watson(1178): [onCreatePanelMenu] returning true
05-11 15:10:47.633: D/ActionBarSherlock(1178): [callbackCreateOptionsMenu] returning true
05-11 15:10:47.633: D/ActionBarSherlock(1178): [dispatchCreateOptionsMenu] returning true
05-11 15:10:47.633: D/SherlockFragmentActivity(1178): [onCreatePanelMenu] returning true
05-11 15:10:47.633: D/SherlockFragmentActivity(1178): [onPreparePanel] featureId: 0, view: null, menu: com.android.internal.view.menu.MenuBuilder@417c37b8
05-11 15:10:47.643: D/ActionBarSherlock(1178): [dispatchPrepareOptionsMenu] menu: com.android.internal.view.menu.MenuBuilder@417c37b8
05-11 15:10:47.643: D/ActionBarSherlock(1178): [callbackPrepareOptionsMenu] menu: com.actionbarsherlock.internal.view.menu.MenuWrapper@417bd5f8
05-11 15:10:47.643: D/Watson(1178): [onPreparePanel] featureId: 0, view: null menu: com.actionbarsherlock.internal.view.menu.MenuWrapper@417bd5f8
05-11 15:10:47.643: D/Watson(1178): [onPreparePanel] activity prepare result: true
05-11 15:10:47.643: D/Watson(1178): [onPreparePanel] fragments prepare result: false
05-11 15:10:47.643: D/Watson(1178): [onPreparePanel] returning false
05-11 15:10:47.643: D/ActionBarSherlock(1178): [callbackPrepareOptionsMenu] returning false
05-11 15:10:47.643: D/ActionBarSherlock(1178): [dispatchPrepareOptionsMenu] returning false
05-11 15:10:47.643: D/SherlockFragmentActivity(1178): [onPreparePanel] returning false
05-11 15:10:47.683: D/gralloc_goldfish(1178): Emulator without GPU emulation detected.
05-11 15:10:51.543: V/21st Polling:(1178): clicked
05-11 15:10:53.154: D/AndroidRuntime(1178): Shutting down VM
05-11 15:10:53.154: W/dalvikvm(1178): threadid=1: thread exiting with uncaught exception (group=0x409961f8)
05-11 15:10:53.244: E/AndroidRuntime(1178): FATAL EXCEPTION: main
05-11 15:10:53.244: E/AndroidRuntime(1178): java.lang.NullPointerException
05-11 15:10:53.244: E/AndroidRuntime(1178):     at android.support.v4.app.FragmentManagerImpl.saveFragmentBasicState(FragmentManager.java:1576)
05-11 15:10:53.244: E/AndroidRuntime(1178):     at android.support.v4.app.FragmentManagerImpl.saveAllState(FragmentManager.java:1617)
05-11 15:10:53.244: E/AndroidRuntime(1178):     at android.support.v4.app.FragmentActivity.onSaveInstanceState(FragmentActivity.java:481)
05-11 15:10:53.244: E/AndroidRuntime(1178):     at com.actionbarsherlock.app.SherlockFragmentActivity.onSaveInstanceState(SherlockFragmentActivity.java:127)
05-11 15:10:53.244: E/AndroidRuntime(1178):     at android.app.Activity.performSaveInstanceState(Activity.java:1113)
05-11 15:10:53.244: E/AndroidRuntime(1178):     at android.app.Instrumentation.callActivityOnSaveInstanceState(Instrumentation.java:1185)
05-11 15:10:53.244: E/AndroidRuntime(1178):     at android.app.ActivityThread.performStopActivityInner(ActivityThread.java:2789)
05-11 15:10:53.244: E/AndroidRuntime(1178):     at android.app.ActivityThread.handleStopActivity(ActivityThread.java:2847)
05-11 15:10:53.244: E/AndroidRuntime(1178):     at android.app.ActivityThread.access$900(ActivityThread.java:122)
05-11 15:10:53.244: E/AndroidRuntime(1178):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1163)
05-11 15:10:53.244: E/AndroidRuntime(1178):     at android.os.Handler.dispatchMessage(Handler.java:99)
05-11 15:10:53.244: E/AndroidRuntime(1178):     at android.os.Looper.loop(Looper.java:137)
05-11 15:10:53.244: E/AndroidRuntime(1178):     at android.app.ActivityThread.main(ActivityThread.java:4340)
05-11 15:10:53.244: E/AndroidRuntime(1178):     at java.lang.reflect.Method.invokeNative(Native Method)
05-11 15:10:53.244: E/AndroidRuntime(1178):     at java.lang.reflect.Method.invoke(Method.java:511)
05-11 15:10:53.244: E/AndroidRuntime(1178):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
05-11 15:10:53.244: E/AndroidRuntime(1178):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
05-11 15:10:53.244: E/AndroidRuntime(1178):     at dalvik.system.NativeStart.main(Native Method)
05-11 15:12:19.614: I/ActionBarSherlock(1226): Registering ActionBarSherlockCompat with qualifier @com.actionbarsherlock.ActionBarSherlock$Implementation(api=7, dpi=-1)
05-11 15:12:19.614: I/ActionBarSherlock(1226): Registering ActionBarSherlockNative with qualifier @com.actionbarsherlock.ActionBarSherlock$Implementation(api=14, dpi=-1)
05-11 15:12:19.624: I/ActionBarSherlock(1226): Using implementation: ActionBarSherlockNative
05-11 15:12:19.624: D/ActionBarSherlock(1226): [<ctor>] activity: com.hotrodsoftware.vgb.MainActivity@417782f0, flags: 1
05-11 15:12:19.634: D/ActionBarSherlock(1226): [setContentView] view: android.support.v4.view.ViewPager@4177b010
05-11 15:12:19.634: D/ActionBarSherlock(1226): [setContentView] view: android.support.v4.view.ViewPager@4177b010, params: android.view.ViewGroup$LayoutParams@41784f00
05-11 15:12:19.714: D/ActionBarSherlock(1226): [getActionBar]
05-11 15:12:19.724: D/ActionBarSherlock(1226): [getActionBar]
05-11 15:12:19.744: V/21st Polling:(1226): clicked
05-11 15:12:20.023: D/SherlockFragmentActivity(1226): [onCreatePanelMenu] featureId: 0, menu: com.android.internal.view.menu.MenuBuilder@417bb1f8
05-11 15:12:20.023: D/ActionBarSherlock(1226): [dispatchCreateOptionsMenu] menu: com.android.internal.view.menu.MenuBuilder@417bb1f8
05-11 15:12:20.033: D/ActionBarSherlock(1226): [callbackCreateOptionsMenu] menu: com.actionbarsherlock.internal.view.menu.MenuWrapper@417bd968
05-11 15:12:20.033: D/Watson(1226): [onCreatePanelMenu] featureId: 0, menu: com.actionbarsherlock.internal.view.menu.MenuWrapper@417bd968
05-11 15:12:20.033: D/Watson(1226): [onCreatePanelMenu] activity create result: true
05-11 15:12:20.033: D/SherlockFragmentActivity(1226): [getSupportMenuInflater]
05-11 15:12:20.033: D/ActionBarSherlock(1226): [getMenuInflater]
05-11 15:12:20.033: D/ActionBarSherlock(1226): [getActionBar]
05-11 15:12:20.043: D/Watson(1226): [onCreatePanelMenu] fragments create result: false
05-11 15:12:20.043: D/Watson(1226): [onCreatePanelMenu] returning true
05-11 15:12:20.043: D/ActionBarSherlock(1226): [callbackCreateOptionsMenu] returning true
05-11 15:12:20.043: D/ActionBarSherlock(1226): [dispatchCreateOptionsMenu] returning true
05-11 15:12:20.043: D/SherlockFragmentActivity(1226): [onCreatePanelMenu] returning true
05-11 15:12:20.043: D/SherlockFragmentActivity(1226): [onPreparePanel] featureId: 0, view: null, menu: com.android.internal.view.menu.MenuBuilder@417bb1f8
05-11 15:12:20.043: D/ActionBarSherlock(1226): [dispatchPrepareOptionsMenu] menu: com.android.internal.view.menu.MenuBuilder@417bb1f8
05-11 15:12:20.043: D/ActionBarSherlock(1226): [callbackPrepareOptionsMenu] menu: com.actionbarsherlock.internal.view.menu.MenuWrapper@417bd968
05-11 15:12:20.053: D/Watson(1226): [onPreparePanel] featureId: 0, view: null menu: com.actionbarsherlock.internal.view.menu.MenuWrapper@417bd968
05-11 15:12:20.053: D/Watson(1226): [onPreparePanel] activity prepare result: true
05-11 15:12:20.053: D/Watson(1226): [onPreparePanel] fragments prepare result: false
05-11 15:12:20.053: D/Watson(1226): [onPreparePanel] returning false
05-11 15:12:20.063: D/ActionBarSherlock(1226): [callbackPrepareOptionsMenu] returning false
05-11 15:12:20.063: D/ActionBarSherlock(1226): [dispatchPrepareOptionsMenu] returning false
05-11 15:12:20.063: D/SherlockFragmentActivity(1226): [onPreparePanel] returning false
05-11 15:12:20.123: D/gralloc_goldfish(1226): Emulator without GPU emulation detected.
05-11 15:12:20.173: D/dalvikvm(1226): GC_CONCURRENT freed 156K, 2% free 14337K/14599K, paused 6ms+4ms
05-11 15:12:22.654: V/21st Polling:(1226): clicked
05-11 15:12:24.244: D/AndroidRuntime(1226): Shutting down VM
05-11 15:12:24.244: W/dalvikvm(1226): threadid=1: thread exiting with uncaught exception (group=0x409961f8)
05-11 15:12:24.304: E/AndroidRuntime(1226): FATAL EXCEPTION: main
05-11 15:12:24.304: E/AndroidRuntime(1226): java.lang.NullPointerException
05-11 15:12:24.304: E/AndroidRuntime(1226):     at android.support.v4.app.FragmentManagerImpl.saveFragmentBasicState(FragmentManager.java:1576)
05-11 15:12:24.304: E/AndroidRuntime(1226):     at android.support.v4.app.FragmentManagerImpl.saveAllState(FragmentManager.java:1617)
05-11 15:12:24.304: E/AndroidRuntime(1226):     at android.support.v4.app.FragmentActivity.onSaveInstanceState(FragmentActivity.java:481)
05-11 15:12:24.304: E/AndroidRuntime(1226):     at com.actionbarsherlock.app.SherlockFragmentActivity.onSaveInstanceState(SherlockFragmentActivity.java:127)
05-11 15:12:24.304: E/AndroidRuntime(1226):     at android.app.Activity.performSaveInstanceState(Activity.java:1113)
05-11 15:12:24.304: E/AndroidRuntime(1226):     at android.app.Instrumentation.callActivityOnSaveInstanceState(Instrumentation.java:1185)
05-11 15:12:24.304: E/AndroidRuntime(1226):     at android.app.ActivityThread.performStopActivityInner(ActivityThread.java:2789)
05-11 15:12:24.304: E/AndroidRuntime(1226):     at android.app.ActivityThread.handleStopActivity(ActivityThread.java:2847)
05-11 15:12:24.304: E/AndroidRuntime(1226):     at android.app.ActivityThread.access$900(ActivityThread.java:122)
05-11 15:12:24.304: E/AndroidRuntime(1226):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1163)
05-11 15:12:24.304: E/AndroidRuntime(1226):     at android.os.Handler.dispatchMessage(Handler.java:99)
05-11 15:12:24.304: E/AndroidRuntime(1226):     at android.os.Looper.loop(Looper.java:137)
05-11 15:12:24.304: E/AndroidRuntime(1226):     at android.app.ActivityThread.main(ActivityThread.java:4340)
05-11 15:12:24.304: E/AndroidRuntime(1226):     at java.lang.reflect.Method.invokeNative(Native Method)
05-11 15:12:24.304: E/AndroidRuntime(1226):     at java.lang.reflect.Method.invoke(Method.java:511)
05-11 15:12:24.304: E/AndroidRuntime(1226):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
05-11 15:12:24.304: E/AndroidRuntime(1226):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
05-11 15:12:24.304: E/AndroidRuntime(1226):     at dalvik.system.NativeStart.main(Native Method)
05-11 15:12:57.515: I/ActionBarSherlock(1274): Registering ActionBarSherlockCompat with qualifier @com.actionbarsherlock.ActionBarSherlock$Implementation(api=7, dpi=-1)
05-11 15:12:57.515: I/ActionBarSherlock(1274): Registering ActionBarSherlockNative with qualifier @com.actionbarsherlock.ActionBarSherlock$Implementation(api=14, dpi=-1)
05-11 15:12:57.524: I/ActionBarSherlock(1274): Using implementation: ActionBarSherlockNative
05-11 15:12:57.524: D/ActionBarSherlock(1274): [<ctor>] activity: com.hotrodsoftware.vgb.MainActivity@417790e0, flags: 1
05-11 15:12:57.524: D/ActionBarSherlock(1274): [setContentView] view: android.support.v4.view.ViewPager@4177be00
05-11 15:12:57.524: D/ActionBarSherlock(1274): [setContentView] view: android.support.v4.view.ViewPager@4177be00, params: android.view.ViewGroup$LayoutParams@41785cf0
05-11 15:12:57.594: D/ActionBarSherlock(1274): [getActionBar]
05-11 15:12:57.604: D/ActionBarSherlock(1274): [getActionBar]
05-11 15:12:57.624: V/21st Polling:(1274): clicked
05-11 15:12:57.843: D/SherlockFragmentActivity(1274): [onCreatePanelMenu] featureId: 0, menu: com.android.internal.view.menu.MenuBuilder@417bbff0
05-11 15:12:57.843: D/ActionBarSherlock(1274): [dispatchCreateOptionsMenu] menu: com.android.internal.view.menu.MenuBuilder@417bbff0
05-11 15:12:57.843: D/ActionBarSherlock(1274): [callbackCreateOptionsMenu] menu: com.actionbarsherlock.internal.view.menu.MenuWrapper@417be760
05-11 15:12:57.855: D/Watson(1274): [onCreatePanelMenu] featureId: 0, menu: com.actionbarsherlock.internal.view.menu.MenuWrapper@417be760
05-11 15:12:57.855: D/Watson(1274): [onCreatePanelMenu] activity create result: true
05-11 15:12:57.855: D/SherlockFragmentActivity(1274): [getSupportMenuInflater]
05-11 15:12:57.855: D/ActionBarSherlock(1274): [getMenuInflater]
05-11 15:12:57.855: D/ActionBarSherlock(1274): [getActionBar]
05-11 15:12:57.855: D/Watson(1274): [onCreatePanelMenu] fragments create result: false
05-11 15:12:57.863: D/Watson(1274): [onCreatePanelMenu] returning true
05-11 15:12:57.863: D/ActionBarSherlock(1274): [callbackCreateOptionsMenu] returning true
05-11 15:12:57.863: D/ActionBarSherlock(1274): [dispatchCreateOptionsMenu] returning true
05-11 15:12:57.863: D/SherlockFragmentActivity(1274): [onCreatePanelMenu] returning true
05-11 15:12:57.863: D/SherlockFragmentActivity(1274): [onPreparePanel] featureId: 0, view: null, menu: com.android.internal.view.menu.MenuBuilder@417bbff0
05-11 15:12:57.863: D/ActionBarSherlock(1274): [dispatchPrepareOptionsMenu] menu: com.android.internal.view.menu.MenuBuilder@417bbff0
05-11 15:12:57.863: D/ActionBarSherlock(1274): [callbackPrepareOptionsMenu] menu: com.actionbarsherlock.internal.view.menu.MenuWrapper@417be760
05-11 15:12:57.863: D/Watson(1274): [onPreparePanel] featureId: 0, view: null menu: com.actionbarsherlock.internal.view.menu.MenuWrapper@417be760
05-11 15:12:57.863: D/Watson(1274): [onPreparePanel] activity prepare result: true
05-11 15:12:57.863: D/Watson(1274): [onPreparePanel] fragments prepare result: false
05-11 15:12:57.863: D/Watson(1274): [onPreparePanel] returning false
05-11 15:12:57.873: D/ActionBarSherlock(1274): [callbackPrepareOptionsMenu] returning false
05-11 15:12:57.873: D/ActionBarSherlock(1274): [dispatchPrepareOptionsMenu] returning false
05-11 15:12:57.873: D/SherlockFragmentActivity(1274): [onPreparePanel] returning false
05-11 15:12:57.953: D/gralloc_goldfish(1274): Emulator without GPU emulation detected.
05-11 15:12:57.963: D/dalvikvm(1274): GC_CONCURRENT freed 159K, 2% free 14337K/14599K, paused 6ms+4ms
05-11 15:12:59.184: V/21st Polling:(1274): clicked
05-11 15:13:00.913: D/AndroidRuntime(1274): Shutting down VM
05-11 15:13:00.913: W/dalvikvm(1274): threadid=1: thread exiting with uncaught exception (group=0x409961f8)
05-11 15:13:00.963: E/AndroidRuntime(1274): FATAL EXCEPTION: main
05-11 15:13:00.963: E/AndroidRuntime(1274): java.lang.NullPointerException
05-11 15:13:00.963: E/AndroidRuntime(1274):     at android.support.v4.app.FragmentManagerImpl.saveFragmentBasicState(FragmentManager.java:1576)
05-11 15:13:00.963: E/AndroidRuntime(1274):     at android.support.v4.app.FragmentManagerImpl.saveAllState(FragmentManager.java:1617)
05-11 15:13:00.963: E/AndroidRuntime(1274):     at android.support.v4.app.FragmentActivity.onSaveInstanceState(FragmentActivity.java:481)
05-11 15:13:00.963: E/AndroidRuntime(1274):     at com.actionbarsherlock.app.SherlockFragmentActivity.onSaveInstanceState(SherlockFragmentActivity.java:127)
05-11 15:13:00.963: E/AndroidRuntime(1274):     at android.app.Activity.performSaveInstanceState(Activity.java:1113)
05-11 15:13:00.963: E/AndroidRuntime(1274):     at android.app.Instrumentation.callActivityOnSaveInstanceState(Instrumentation.java:1185)
05-11 15:13:00.963: E/AndroidRuntime(1274):     at android.app.ActivityThread.performStopActivityInner(ActivityThread.java:2789)
05-11 15:13:00.963: E/AndroidRuntime(1274):     at android.app.ActivityThread.handleStopActivity(ActivityThread.java:2847)
05-11 15:13:00.963: E/AndroidRuntime(1274):     at android.app.ActivityThread.access$900(ActivityThread.java:122)
05-11 15:13:00.963: E/AndroidRuntime(1274):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1163)
05-11 15:13:00.963: E/AndroidRuntime(1274):     at android.os.Handler.dispatchMessage(Handler.java:99)
05-11 15:13:00.963: E/AndroidRuntime(1274):     at android.os.Looper.loop(Looper.java:137)
05-11 15:13:00.963: E/AndroidRuntime(1274):     at android.app.ActivityThread.main(ActivityThread.java:4340)
05-11 15:13:00.963: E/AndroidRuntime(1274):     at java.lang.reflect.Method.invokeNative(Native Method)
05-11 15:13:00.963: E/AndroidRuntime(1274):     at java.lang.reflect.Method.invoke(Method.java:511)
05-11 15:13:00.963: E/AndroidRuntime(1274):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
05-11 15:13:00.963: E/AndroidRuntime(1274):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
05-11 15:13:00.963: E/AndroidRuntime(1274):     at dalvik.system.NativeStart.main(Native Method)

如果有什么不同，我将在应用程序中使用ActionBarSherlock库。

If it makes any difference I'm using the ActionBarSherlock library in my app.

推荐答案

如果在有关SO的另一个问题。在我的TabsAdapter中，我扩展了 FragmentPageAdapter 。我必须更改它以扩展 FragmentStatePagerAdapter ，问题已解决。

If found the solution in another question on SO. In my TabsAdapter I was extending FragmentPageAdapter. I have to change that to extend FragmentStatePagerAdapter and the problem was resolved.

感谢技巧@Secran Ozdemir，可以帮助我找到问题所在。

Thanks for the tip @Secran Ozdemir, that helped me locate the problem.

这篇关于Android应用程式在startActivity时当机的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！