遇到了一個難纏的問題，搜了N天的沒有解決：

07-02?15:40:25.415:?D/LocateService(6711):?onLocationChanged:?AMapLocation?location?=Location[lbs?0.000000,0.000000?acc=0?t=?!??et=?!??{Bundle[{adcode=,?citycode=,?desc=}]}] 07-02?15:40:25.425:?D/AMapLocateListener(6711):?onLocationChanged:?location?=?Location[lbs?0.000000,0.000000?acc=0?t=?!??et=?!??{Bundle[{adcode=,?citycode=,?desc=}]}] 07-02?15:40:25.475:?I/AuthFailure(6711):?INVALID_USER_SCODE 07-02?15:40:29.105:?D/GatewayPresentor(6711):?logout:?component?=?push 07-02?15:40:29.105:?D/GatewayComponent(6711):?logout 07-02?15:40:29.105:?W/GatewayComponent(6711):?mLogged?=?false,?mSender?=?com.autonavi.connector.clientsdk.Sender@432462d8 07-02?15:40:29.105:?D/WorkOrderFragment(6711):?onDetach 07-02?15:40:29.105:?D/OrderFragment(6711):?onDetach 07-02?15:40:29.115:?D/GatewayPresentor(6711):?login:?component?=?push,?accessKey?=?2,?userId?=?2,?token?=?5ad04ba7-de02-4203-a077-a79581c89252 07-02?15:40:29.115:?D/GatewayComponent(6711):?login:?accessKey?=?2,?userId?=?2,?token?=?5ad04ba7-de02-4203-a077-a79581c89252 07-02?15:40:29.115:?I/Sender(6711):?生成消息號:6166812093405200387 07-02?15:40:29.125:?D/ReadableDatabaseHelper(6711):?query:?distinct?=?false,?table?=?TWorkOrder,?columns?=?null,?selection?=?create_time?>=?datetime('2015-07-02?15:38:29'),?selectionArgs?=?null,?groupBy?=?null,?having?=?null,?orderBy?=?null,?limit?=null 07-02?15:40:29.125:?D/OrderFragment(6711):?onAttach 07-02?15:40:29.155:?D/AndroidRuntime(6711):?Shutting?down?VM 07-02?15:40:29.155:?W/dalvikvm(6711):?threadid=1:?thread?exiting?with?uncaught?exception?(group=0x4173cd58) 07-02?15:40:29.155:?E/AndroidRuntime(6711):?FATAL?EXCEPTION:?main 07-02?15:40:29.155:?E/AndroidRuntime(6711):?Process:?com.autonavi.taoparking.parker,?PID:?6711 07-02?15:40:29.155:?E/AndroidRuntime(6711):?java.lang.RuntimeException:?Unable?to?start?activity?ComponentInfo{com.autonavi.taoparking.parker/com.autonavi.taoparking.parker.ManageOrderActivity}:?java.lang.ClassCastException:?android.view.AbsSavedState$1?cannot?be?cast?to?android.widget.HorizontalScrollView$SavedState 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2190) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2239) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3730) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?android.app.ActivityThread.access$900(ActivityThread.java:141) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?android.app.ActivityThread$H.handleMessage(ActivityThread.java:1208) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?android.os.Handler.dispatchMessage(Handler.java:102) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?android.os.Looper.loop(Looper.java:136) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?android.app.ActivityThread.main(ActivityThread.java:5047) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?java.lang.reflect.Method.invokeNative(Native?Method) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?java.lang.reflect.Method.invoke(Method.java:515) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:806) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?com.android.internal.os.ZygoteInit.main(ZygoteInit.java:622) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?dalvik.system.NativeStart.main(Native?Method) 07-02?15:40:29.155:?E/AndroidRuntime(6711):?Caused?by:?java.lang.ClassCastException:?android.view.AbsSavedState$1?cannot?be?cast?to?android.widget.HorizontalScrollView$SavedState 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?android.widget.HorizontalScrollView.onRestoreInstanceState(HorizontalScrollView.java:1659) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?android.view.View.dispatchRestoreInstanceState(View.java:12810) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:2637) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:2643) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:2643) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?android.view.View.restoreHierarchyState(View.java:12788) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?com.android.internal.policy.impl.PhoneWindow.restoreHierarchyState(PhoneWindow.java:1744) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?android.app.Activity.onRestoreInstanceState(Activity.java:955) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?android.app.Activity.performRestoreInstanceState(Activity.java:927) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?android.app.Instrumentation.callActivityOnRestoreInstanceState(Instrumentation.java:1138) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? at?android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2168) 07-02?15:40:29.155:?E/AndroidRuntime(6711):? ...?12?more 07-02?15:40:31.695:?I/Sender(6711):?..............發(fā)送心跳 07-02?15:40:31.825:?I/Sender(6711):?重試連接到服務(wù)器 07-02?15:40:31.885:?W/System.err(6711):?java.net.ConnectException:?failed?to?connect?to?/120.26.196.74?(port?10000):?connect?failed:?ECONNREFUSED?(Connection?refused) 07-02?15:40:31.885:?W/System.err(6711):? at?libcore.io.IoBridge.connect(IoBridge.java:114) 07-02?15:40:31.885:?W/System.err(6711):? at?java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192) 07-02?15:40:31.885:?W/System.err(6711):? at?java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) 07-02?15:40:31.885:?W/System.err(6711):? at?java.net.Socket.startupSocket(Socket.java:566) 07-02?15:40:31.885:?W/System.err(6711):? at?java.net.Socket.tryAllAddresses(Socket.java:128) 07-02?15:40:31.885:?W/System.err(6711):? at?java.net.Socket.<init>(Socket.java:178) 07-02?15:40:31.885:?W/System.err(6711):? at?java.net.Socket.<init>(Socket.java:150) 07-02?15:40:31.885:?W/System.err(6711):? at?com.autonavi.connector.clientsdk.ClientContext$1.run(ClientContext.java:74) 07-02?15:40:31.885:?W/System.err(6711):? at?java.lang.Thread.run(Thread.java:841) 07-02?15:40:31.885:?W/System.err(6711):?Caused?by:?libcore.io.ErrnoException:?connect?failed:?ECONNREFUSED?(Connection?refused) 07-02?15:40:31.885:?W/System.err(6711):? at?libcore.io.Posix.connect(Native?Method) 07-02?15:40:31.885:?W/System.err(6711):? at?libcore.io.BlockGuardOs.connect(BlockGuardOs.java:85) 07-02?15:40:31.885:?W/System.err(6711):? at?libcore.io.IoBridge.connectErrno(IoBridge.java:127) 07-02?15:40:31.885:?W/System.err(6711):? at?libcore.io.IoBridge.connect(IoBridge.java:112) 07-02?15:40:31.885:?W/System.err(6711):? ...?8?more 07-02?15:40:31.885:?W/Sender(6711):?failed?to?connect?to?/120.26.196.74?(port?10000):?connect?failed:?ECONNREFUSED?(Connection?refused) 07-02?15:40:41.695:?I/Sender(6711):?..............發(fā)送心跳 07-02?15:40:41.885:?I/Sender(6711):?重試連接到服務(wù)器 07-02?15:40:41.945:?W/GatewayComponent(6711):?mLogAction?=?LOGIN,?failure:?code?=?-2004,?message?=?發(fā)送消息沒有回執(zhí)確認 07-02?15:40:41.945:?D/GatewayService(6711):?mLocationLog.onFailed:?code?=?-2004,?message?=?發(fā)送消息沒有回執(zhí)確認 07-02?15:40:41.945:?W/System.err(6711):?java.net.ConnectException:?failed?to?connect?to?/120.26.196.74?(port?10000):?connect?failed:?ECONNREFUSED?(Connection?refused) 07-02?15:40:41.945:?W/System.err(6711):? at?libcore.io.IoBridge.connect(IoBridge.java:114) 07-02?15:40:41.945:?W/System.err(6711):? at?java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192) 07-02?15:40:41.945:?W/System.err(6711):? at?java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) 07-02?15:40:41.945:?W/System.err(6711):? at?java.net.Socket.startupSocket(Socket.java:566) 07-02?15:40:41.945:?W/System.err(6711):? at?java.net.Socket.tryAllAddresses(Socket.java:128) 07-02?15:40:41.945:?W/System.err(6711):? at?java.net.Socket.<init>(Socket.java:178) 07-02?15:40:41.945:?W/System.err(6711):? at?java.net.Socket.<init>(Socket.java:150) 07-02?15:40:41.945:?W/System.err(6711):? at?com.autonavi.connector.clientsdk.ClientContext$1.run(ClientContext.java:74) 07-02?15:40:41.945:?W/System.err(6711):? at?java.lang.Thread.run(Thread.java:841) 07-02?15:40:41.945:?W/System.err(6711):?Caused?by:?libcore.io.ErrnoException:?connect?failed:?ECONNREFUSED?(Connection?refused) 07-02?15:40:41.945:?W/System.err(6711):? at?libcore.io.Posix.connect(Native?Method) 07-02?15:40:41.945:?W/System.err(6711):? at?libcore.io.BlockGuardOs.connect(BlockGuardOs.java:85) 07-02?15:40:41.945:?W/System.err(6711):? at?libcore.io.IoBridge.connectErrno(IoBridge.java:127) 07-02?15:40:41.945:?W/System.err(6711):? at?libcore.io.IoBridge.connect(IoBridge.java:112) 07-02?15:40:41.945:?W/System.err(6711):? ...?8?more 07-02?15:40:41.945:?W/Sender(6711):?failed?to?connect?to?/120.26.196.74?(port?10000):?connect?failed:?ECONNREFUSED?(Connection?refused) 07-02?15:40:43.935:?W/GatewayComponent(6711):?mLogAction?=?LOGIN,?failure:?code?=?-2004,?message?=?發(fā)送消息沒有回執(zhí)確認 07-02?15:40:43.935:?D/GatewayService(6711):?mPushLog.onFailed:?code?=?-2004,?message?=?發(fā)送消息沒有回執(zhí)確認

網(wǎng)上大部分人都說是因為同一個頁面（Activity），不同的View使用了相同的ID，導(dǎo)致在恢復(fù)時，findViewById，強制轉(zhuǎn)換SaveState類型錯誤，可是我對比了半天整個工程中就一個SlidingTabLayout（繼承HorizontalScrollView）使用了android:id="@+id/slidingTabLayout"，應(yīng)該不是網(wǎng)友說的這種情況，但是我也不知道為什么傳的AbsSavedState$1給HorizontalScrollView，無奈去翻源碼：

????@Overrideprotected?void?onRestoreInstanceState(Parcelable?state)?{if?(mContext.getApplicationInfo().targetSdkVersion?<=?Build.VERSION_CODES.JELLY_BEAN_MR2)?{//?Some?old?apps?reused?IDs?in?ways?they?shouldn't?have.//?Don't?break?them,?but?they?don't?get?scroll?state?restoration.super.onRestoreInstanceState(state);return;}SavedState?ss?=?(SavedState)?state;super.onRestoreInstanceState(ss.getSuperState());mSavedState?=?ss;requestLayout();}

大概意思就是在Android API 18（4.2.2和4.4.2之間的一個版本）以前，不會保存ScrollView的滾動條位置，這個對我影響也不是很大，規(guī)避這個問題我能想到有如下兩種：

將AndroidMainifest.xml中android:targetSdkVersion降為18以下（如果需要記錄這個狀態(tài)，可以在onSaveInstanceState中記錄位置，onRestoreInstanceState中恢復(fù)就可以了）；

不讓View保存狀態(tài)：

android:saveEnabled="false"|setSaveEnabled(false)|不要給view設(shè)置id

/***?Called?by?{@link?#saveHierarchyState(android.util.SparseArray)}?to?store?the?state?for*?this?view?and?its?children.?May?be?overridden?to?modify?how?freezing?happens?to?a*?view's?children;?for?example,?some?views?may?want?to?not?store?state?for?their?children.**?@param?container?The?SparseArray?in?which?to?save?the?view's?state.**?@see?#dispatchRestoreInstanceState(android.util.SparseArray)*?@see?#saveHierarchyState(android.util.SparseArray)*?@see?#onSaveInstanceState()*/ protected?void?dispatchSaveInstanceState(SparseArray<Parcelable>?container)?{if?(mID?!=?NO_ID?&&?(mViewFlags?&?SAVE_DISABLED_MASK)?==?0)?{mPrivateFlags?&=?~PFLAG_SAVE_STATE_CALLED;Parcelable?state?=?onSaveInstanceState();if?((mPrivateFlags?&?PFLAG_SAVE_STATE_CALLED)?==?0)?{throw?new?IllegalStateException("Derived?class?did?not?call?super.onSaveInstanceState()");}if?(state?!=?null)?{//?Log.i("View",?"Freezing?#"?+?Integer.toHexString(mID)//?+?":?"?+?state);container.put(mID,?state);}} }

轉(zhuǎn)載于:https://blog.51cto.com/lbrant/1670280

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