onStart方法中的restartLoader抛出异常

Question

我正在使用Android兼容性包来使用Loaders。当我初始化一个加载程序或在onCreate方法重新启动它，它只是找到了，但当我重新启动或初始化它在onStart它会抛出一个错误，我想知道为什么“有些时候”当我initLoader在活动的onCreate并在加载器将数据绑定到UI之前单击某个按钮将其快速移动到另一个活动，然后返回到之前启动Loader的活动，加载器不会加载数据“UI上没有任何内容？!!!! so我认为移动initLoader到onStart但它抛出一个错误

07-13 03:19:15.140: E/AndroidRuntime(23179): java.lang.RuntimeException: Unable to resume activity {biz.dot.khtmeh/biz.dot.khtmeh.ui.HomeScreen}: java.lang.IllegalStateException: There is already a listener registered 
07-13 03:19:15.140: E/AndroidRuntime(23179): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2444) 
07-13 03:19:15.140: E/AndroidRuntime(23179): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2472) 
07-13 03:19:15.140: E/AndroidRuntime(23179): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1173) 
07-13 03:19:15.140: E/AndroidRuntime(23179): at android.os.Handler.dispatchMessage(Handler.java:99) 
07-13 03:19:15.140: E/AndroidRuntime(23179): at android.os.Looper.loop(Looper.java:137) 
07-13 03:19:15.140: E/AndroidRuntime(23179): at android.app.ActivityThread.main(ActivityThread.java:4424) 
07-13 03:19:15.140: E/AndroidRuntime(23179): at java.lang.reflect.Method.invokeNative(Native Method) 
07-13 03:19:15.140: E/AndroidRuntime(23179): at java.lang.reflect.Method.invoke(Method.java:511) 
07-13 03:19:15.140: E/AndroidRuntime(23179): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
07-13 03:19:15.140: E/AndroidRuntime(23179): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
07-13 03:19:15.140: E/AndroidRuntime(23179): at dalvik.system.NativeStart.main(Native Method) 
07-13 03:19:15.140: E/AndroidRuntime(23179): Caused by: java.lang.IllegalStateException: There is already a listener registered 
07-13 03:19:15.140: E/AndroidRuntime(23179): at android.support.v4.content.Loader.registerListener(Loader.java:130) 
07-13 03:19:15.140: E/AndroidRuntime(23179): at android.support.v4.app.LoaderManagerImpl$LoaderInfo.start(LoaderManager.java:259) 
07-13 03:19:15.140: E/AndroidRuntime(23179): at android.support.v4.app.LoaderManagerImpl.installLoader(LoaderManager.java:509) 
07-13 03:19:15.140: E/AndroidRuntime(23179): at android.support.v4.app.LoaderManagerImpl.createAndInstallLoader(LoaderManager.java:496) 
07-13 03:19:15.140: E/AndroidRuntime(23179): at android.support.v4.app.LoaderManagerImpl.restartLoader(LoaderManager.java:642) 

Answer 1

很可能你重新使用装载机不止一次。每次onCreateLoader(..)被调用时，你应该返回一个的新实例。