为什么我在退出我的 Activity 时会崩溃?
当我(通过后退按钮)退出 Activity 时,我的应用程序崩溃了.据我所知,这发生在 Android 代码库中,而不是我的,但我并不完全相信这一点.
I am experiencing a crash in my app when I quit (via the back button) out of my Activity. So far as I can tell this is happening in the Android codebase and not mine, but I'm not completely convinced of that.
这是来自 adb 的堆栈跟踪:
Here's the stacktrace from adb:
AndroidRuntime E Uncaught handler: thread main exiting due to uncaught exception
AndroidRuntime E java.lang.RuntimeException: Unable to stop activity {MyApp/MyApp.MainActivity}: java.lang.NullPointerException
AndroidRuntime E at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3097)
AndroidRuntime E at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:3159)
AndroidRuntime E at android.app.ActivityThread.access$2400(ActivityThread.java:112)
AndroidRuntime E at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1724)
AndroidRuntime E at android.os.Handler.dispatchMessage(Handler.java:99)
AndroidRuntime E at android.os.Looper.loop(Looper.java:123)
AndroidRuntime E at android.app.ActivityThread.main(ActivityThread.java:3948)
AndroidRuntime E at java.lang.reflect.Method.invokeNative(Native Method)
AndroidRuntime E at java.lang.reflect.Method.invoke(Method.java:521)
AndroidRuntime E at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:782)
AndroidRuntime E at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540)
AndroidRuntime E at dalvik.system.NativeStart.main(Native Method)
AndroidRuntime E Caused by: java.lang.NullPointerException
AndroidRuntime E at android.app.Activity.performStop(Activity.java:3575)
AndroidRuntime E at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3092)
AndroidRuntime E ... 11 more
有人有什么想法/建议吗?
Anyone have any ideas/recommendations?
推荐答案
帮不上什么忙,因为没有代码.还在看
Can't help much, as there's no code. Still looking at
引起:java.lang.NullPointerException atandroid.app.Activity.performStop(Activity.java:3575)
Caused by: java.lang.NullPointerException at android.app.Activity.performStop(Activity.java:3575)
我刚刚检查了 Activity.java
I just checked Activity.java
final int N = mManagedCursors.size();
for (int i=0; i<N; i++) {
ManagedCursor mc = mManagedCursors.get(i);
if (!mc.mReleased) {
mc.mCursor.deactivate(); // line 3575
mc.mReleased = true;
}
}
你确定所有的游标都被正确释放了吗?
Are you sure all cursors are released properly?
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