我在 Playstore 中列出了一个应用程序，一些用户报告了强制关闭问题。我去开发者控制台查看详细信息，并显示以下消息。我android support library在应用程序中使用过。类扩展FragmentActivity和我使用的其他导入是
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.AsyncTaskLoader;
import android.support.v4.content.Loader;
堆栈跟踪
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.support.v4.a.h.done(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274)
at java.util.concurrent.FutureTask.setException(FutureTask.java:125)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
at java.lang.Thread.run(Thread.java:1019)
Caused by: java.lang.NullPointerException
at my.package.name.k.n(Unknown Source)
at my.package.name.k.d(Unknown Source)
at android.support.v4.a.a.e(Unknown Source)
at android.support.v4.a.b.a(Unknown Source)
at android.support.v4.a.b.a(Unknown Source)
at android.support.v4.a.g.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
... 4 more
For applications that include obfuscated code, stack traces contain obfuscated symbol
names. If the application was obfuscated using ProGuard, you can unobfuscate the stack
trace using the "retrace" tool, included in the Android SDK Tools r8 and later. For
more information, see the ProGuard document.