今天要在Android端实现一个Navigation导航栏，代码需要通过LayoutInflater.from对BottomNavigationView进行初始化，但是总是报下面的错误，看了一下错误堆栈报了The style on this component requires your app theme to be Theme.AppCompat (or a descendant)这个错误

   ┌────────────────────────────────────────────────────────────────────────────────────────────────────────────────│ main, com.example.oednetworkexample.components.general.function.tool.LogHelper.e(LogHelper.java:28)│       com.example.oednetworkexample.components.general.userinterface.base.OEDTestAbsView.performCreate(OEDTestAbsView.java:188)├┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄│ [ToolPanelOEDTestView]: Binary XML file line #36 in oednetwork.tencent.com.oednetworkexample:layout/oedtest_home_panel: Binary XML file line #36 in oednetwork.tencent.com.oednetworkexample:layout/oedtest_home_panel: Error inflating class android.support.design.widget.BottomNavigationView└────────────────────────────────────────────────────────────────────────────────────────────────────────────────
2020-08-17 20:51:53.138 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err: android.view.InflateException: Binary XML file line #36 in oednetwork.tencent.com.oednetworkexample:layout/oedtest_home_panel: Binary XML file line #36 in oednetwork.tencent.com.oednetworkexample:layout/oedtest_home_panel: Error inflating class android.support.design.widget.BottomNavigationView
2020-08-17 20:51:53.138 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err: Caused by: android.view.InflateException: Binary XML file line #36 in oednetwork.tencent.com.oednetworkexample:layout/oedtest_home_panel: Error inflating class android.support.design.widget.BottomNavigationView
2020-08-17 20:51:53.138 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err: Caused by: java.lang.reflect.InvocationTargetException
2020-08-17 20:51:53.138 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at java.lang.reflect.Constructor.newInstance0(Native Method)
2020-08-17 20:51:53.138 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at java.lang.reflect.Constructor.newInstance(Constructor.java:343)
2020-08-17 20:51:53.138 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.LayoutInflater.createView(LayoutInflater.java:852)
2020-08-17 20:51:53.138 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:1004)
2020-08-17 20:51:53.138 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:959)
2020-08-17 20:51:53.139 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.LayoutInflater.rInflate(LayoutInflater.java:1121)
2020-08-17 20:51:53.139 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1082)
2020-08-17 20:51:53.139 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.LayoutInflater.inflate(LayoutInflater.java:680)
2020-08-17 20:51:53.139 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.LayoutInflater.inflate(LayoutInflater.java:532)
2020-08-17 20:51:53.139 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at com.example.oednetworkexample.components.general.userinterface.base.ToolPanelOEDTestView.onCreateView(ToolPanelOEDTestView.kt:67)
2020-08-17 20:51:53.139 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at com.example.oednetworkexample.components.general.userinterface.base.OEDTestAbsView.performCreate(OEDTestAbsView.java:134)
2020-08-17 20:51:53.139 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at com.example.oednetworkexample.components.floatwindow.SystemOEDTestViewManager.attach(SystemOEDTestViewManager.java:57)
2020-08-17 20:51:53.139 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at com.example.oednetworkexample.components.floatwindow.OEDTestViewManager.attach(OEDTestViewManager.java:57)
2020-08-17 20:51:53.139 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at com.example.oednetworkexample.components.floatwindow.OEDTestViewManager.attachToolPanel(OEDTestViewManager.java:68)
2020-08-17 20:51:53.140 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at com.example.oednetworkexample.oedtest.publicheader.OEDTestTool.showToolPanel(OEDTestTool.kt:80)
2020-08-17 20:51:53.140 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at com.example.oednetworkexample.oedtest.publicheader.OEDTest.showToolPanel(OEDTest.kt:36)
2020-08-17 20:51:53.140 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at com.example.oednetworkexample.oedtest.userinterface.MainIconOEDTestView$1.onClick(MainIconOEDTestView.java:38)
2020-08-17 20:51:53.140 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.View.performClick(View.java:7448)
2020-08-17 20:51:53.140 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at com.example.oednetworkexample.components.general.userinterface.base.TouchProxy.onTouchEvent(TouchProxy.java:72)
2020-08-17 20:51:53.140 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at com.example.oednetworkexample.components.general.userinterface.base.OEDTestAbsView$3.onTouch(OEDTestAbsView.java:142)
2020-08-17 20:51:53.141 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.View.dispatchTouchEvent(View.java:14297)
2020-08-17 20:51:53.141 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3041)
2020-08-17 20:51:53.141 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2742)
2020-08-17 20:51:53.141 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.View.dispatchPointerEvent(View.java:14560)
2020-08-17 20:51:53.141 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:5991)
2020-08-17 20:51:53.141 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5794)
2020-08-17 20:51:53.141 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5285)
2020-08-17 20:51:53.141 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5342)
2020-08-17 20:51:53.141 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5308)
2020-08-17 20:51:53.141 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:5460)
2020-08-17 20:51:53.141 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5316)
2020-08-17 20:51:53.141 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:5517)
2020-08-17 20:51:53.142 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5289)
2020-08-17 20:51:53.142 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5342)
2020-08-17 20:51:53.142 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5308)
2020-08-17 20:51:53.142 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5316)
2020-08-17 20:51:53.142 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5289)
2020-08-17 20:51:53.142 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:8055)
2020-08-17 20:51:53.142 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:8006)
2020-08-17 20:51:53.142 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7967)
2020-08-17 20:51:53.142 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:8177)
2020-08-17 20:51:53.142 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:220)
2020-08-17 20:51:53.142 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.os.MessageQueue.nativePollOnce(Native Method)
2020-08-17 20:51:53.142 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.os.MessageQueue.next(MessageQueue.java:335)
2020-08-17 20:51:53.142 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.os.Looper.loop(Looper.java:183)
2020-08-17 20:51:53.143 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.app.ActivityThread.main(ActivityThread.java:7656)
2020-08-17 20:51:53.143 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at java.lang.reflect.Method.invoke(Native Method)
2020-08-17 20:51:53.143 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
2020-08-17 20:51:53.143 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
2020-08-17 20:51:53.143 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err: Caused by: java.lang.IllegalArgumentException: The style on this component requires your app theme to be Theme.AppCompat (or a descendant).
2020-08-17 20:51:53.143 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.support.design.internal.ThemeEnforcement.checkTheme(ThemeEnforcement.java:221)
2020-08-17 20:51:53.143 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.support.design.internal.ThemeEnforcement.checkAppCompatTheme(ThemeEnforcement.java:196)
2020-08-17 20:51:53.143 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.support.design.internal.ThemeEnforcement.checkCompatibleTheme(ThemeEnforcement.java:131)
2020-08-17 20:51:53.144 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.support.design.internal.ThemeEnforcement.obtainTintedStyledAttributes(ThemeEnforcement.java:110)
2020-08-17 20:51:53.144 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.support.design.widget.BottomNavigationView.<init>(BottomNavigationView.java:138)
2020-08-17 20:51:53.144 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.support.design.widget.BottomNavigationView.<init>(BottomNavigationView.java:114)
2020-08-17 20:51:53.144 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:    ... 49 more
2020-08-17 20:51:53.144 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err: java.lang.IllegalArgumentException: Params must be WindowManager.LayoutParams
2020-08-17 20:51:53.144 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:340)
2020-08-17 20:51:53.144 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:109)
2020-08-17 20:51:53.144 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at com.example.oednetworkexample.components.floatwindow.SystemOEDTestViewManager.attach(SystemOEDTestViewManager.java:59)
2020-08-17 20:51:53.144 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at com.example.oednetworkexample.components.floatwindow.OEDTestViewManager.attach(OEDTestViewManager.java:57)
2020-08-17 20:51:53.145 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at com.example.oednetworkexample.components.floatwindow.OEDTestViewManager.attachToolPanel(OEDTestViewManager.java:68)
2020-08-17 20:51:53.145 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at com.example.oednetworkexample.oedtest.publicheader.OEDTestTool.showToolPanel(OEDTestTool.kt:80)
2020-08-17 20:51:53.145 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at com.example.oednetworkexample.oedtest.publicheader.OEDTest.showToolPanel(OEDTest.kt:36)
2020-08-17 20:51:53.145 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at com.example.oednetworkexample.oedtest.userinterface.MainIconOEDTestView$1.onClick(MainIconOEDTestView.java:38)
2020-08-17 20:51:53.145 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.View.performClick(View.java:7448)
2020-08-17 20:51:53.145 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at com.example.oednetworkexample.components.general.userinterface.base.TouchProxy.onTouchEvent(TouchProxy.java:72)
2020-08-17 20:51:53.145 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at com.example.oednetworkexample.components.general.userinterface.base.OEDTestAbsView$3.onTouch(OEDTestAbsView.java:142)
2020-08-17 20:51:53.145 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.View.dispatchTouchEvent(View.java:14297)
2020-08-17 20:51:53.145 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3041)
2020-08-17 20:51:53.145 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2742)
2020-08-17 20:51:53.145 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.View.dispatchPointerEvent(View.java:14560)
2020-08-17 20:51:53.145 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:5991)
2020-08-17 20:51:53.145 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5794)
2020-08-17 20:51:53.145 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5285)
2020-08-17 20:51:53.145 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5342)
2020-08-17 20:51:53.145 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5308)
2020-08-17 20:51:53.146 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:5460)
2020-08-17 20:51:53.146 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5316)
2020-08-17 20:51:53.146 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:5517)
2020-08-17 20:51:53.146 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5289)
2020-08-17 20:51:53.146 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5342)
2020-08-17 20:51:53.146 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5308)
2020-08-17 20:51:53.146 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5316)
2020-08-17 20:51:53.146 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5289)
2020-08-17 20:51:53.146 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:8055)
2020-08-17 20:51:53.146 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:8006)
2020-08-17 20:51:53.146 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7967)
2020-08-17 20:51:53.146 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:8177)
2020-08-17 20:51:53.146 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:220)
2020-08-17 20:51:53.146 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.os.MessageQueue.nativePollOnce(Native Method)
2020-08-17 20:51:53.147 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.os.MessageQueue.next(MessageQueue.java:335)
2020-08-17 20:51:53.147 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.os.Looper.loop(Looper.java:183)
2020-08-17 20:51:53.147 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at android.app.ActivityThread.main(ActivityThread.java:7656)
2020-08-17 20:51:53.147 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at java.lang.reflect.Method.invoke(Native Method)
2020-08-17 20:51:53.148 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
2020-08-17 20:51:53.148 2754-2754/oednetwork.tencent.com.oednetworkexample W/System.err:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)

定位可以发现主要是因为LayoutInflater.from解析android.support.design.widget.BottomNavigationView这个组件错误，进入到BottomNavigationView打断点调试

...TintTypedArray a = ThemeEnforcement.obtainTintedStyledAttributes(context, attrs, styleable.BottomNavigationView, defStyleAttr, style.Widget_Design_BottomNavigationView, new int[]{styleable.BottomNavigationView_itemTextAppearanceInactive, styleable.BottomNavigationView_itemTextAppearanceActive});
...

进入继续调试

 checkCompatibleTheme(context, set, defStyleAttr, defStyleRes);

进入继续调试

 checkAppCompatTheme(context);

进入继续调试

 checkTheme(context, APPCOMPAT_CHECK_ATTRS, "Theme.AppCompat");

找到了报错的地方

      if (!isTheme(context, themeAttributes)) {throw new IllegalArgumentException("The style on this component requires your app theme to be " + themeName + " (or a descendant).");}

跟主题没找到有关。

解决方法

在 android.support.design.widget.BottomNavigationView中要加入android:theme="@style/AppTheme"即可解决。

一直认为 LayoutInflater.from() 传入应用上下文一劳永逸且安全，在大多数场景下没有问题，可以成功解析，但是对于有 theme 要求的控件，还是要把android:theme标签加入。

参考文章

1、https://juejin.im/post/6844903987418759175

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