Binary XML file line #2: Error inflating class ＜unknown＞

1.背景

之前一直用的8.0版本模拟器没啥问题，偶然间切换到了android 6.0 版本的模拟器，发现我的应用崩了。

2.错误堆栈

01-26 02:26:28.670 3682-3682/pers.hl.library.debug E/AndroidRuntime: FATAL EXCEPTION: mainProcess: pers.hl.library.debug, PID: 3682java.lang.RuntimeException: Unable to start activity ComponentInfo{pers.hl.library.debug/pers.hl.module_login.LoginActivity}: java.lang.reflect.InvocationTargetExceptionat android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)at android.app.ActivityThread.-wrap11(ActivityThread.java)at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)at android.os.Handler.dispatchMessage(Handler.java:102)at android.os.Looper.loop(Looper.java:148)at android.app.ActivityThread.main(ActivityThread.java:5417)at java.lang.reflect.Method.invoke(Native Method)at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)Caused by: java.lang.reflect.InvocationTargetExceptionat java.lang.reflect.Method.invoke(Native Method)at pers.hl.common.base.BaseVBActivity.initRootView(BaseVBActivity.kt:48)at pers.hl.common.base.BaseVBActivity.init(BaseVBActivity.kt:32)at pers.hl.common.base.BaseVBActivity.onCreate(BaseVBActivity.kt:27)at pers.hl.common.base.BaseVBVMActivity.onCreate(BaseVBVMActivity.kt:23)at android.app.Activity.performCreate(Activity.java:6237)at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) at android.app.ActivityThread.-wrap11(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5417) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) Caused by: android.view.InflateException: Binary XML file line #2: Binary XML file line #2: Error inflating class <unknown>at android.view.LayoutInflater.inflate(LayoutInflater.java:539)at android.view.LayoutInflater.inflate(LayoutInflater.java:423)at pers.hl.module_login.databinding.LoginActivityLoginBinding.inflate(LoginActivityLoginBinding.java:70)at pers.hl.module_login.databinding.LoginActivityLoginBinding.inflate(LoginActivityLoginBinding.java:64)at java.lang.reflect.Method.invoke(Native Method) at pers.hl.common.base.BaseVBActivity.initRootView(BaseVBActivity.kt:48) at pers.hl.common.base.BaseVBActivity.init(BaseVBActivity.kt:32) at pers.hl.common.base.BaseVBActivity.onCreate(BaseVBActivity.kt:27) at pers.hl.common.base.BaseVBVMActivity.onCreate(BaseVBVMActivity.kt:23) at android.app.Activity.performCreate(Activity.java:6237) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) at android.app.ActivityThread.-wrap11(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5417) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class <unknown>at android.view.LayoutInflater.createView(LayoutInflater.java:645)at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:764)at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)at android.view.LayoutInflater.inflate(LayoutInflater.java:492)at android.view.LayoutInflater.inflate(LayoutInflater.java:423) at pers.hl.module_login.databinding.LoginActivityLoginBinding.inflate(LoginActivityLoginBinding.java:70) at pers.hl.module_login.databinding.LoginActivityLoginBinding.inflate(LoginActivityLoginBinding.java:64) at java.lang.reflect.Method.invoke(Native Method) at pers.hl.common.base.BaseVBActivity.initRootView(BaseVBActivity.kt:48) at pers.hl.common.base.BaseVBActivity.init(BaseVBActivity.kt:32) at pers.hl.common.base.BaseVBActivity.onCreate(BaseVBActivity.kt:27) at pers.hl.common.base.BaseVBVMActivity.onCreate(BaseVBVMActivity.kt:23) at android.app.Activity.performCreate(Activity.java:6237) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) at android.app.ActivityThread.-wrap11(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5417) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) Caused by: java.lang.reflect.InvocationTargetExceptionat java.lang.reflect.Constructor.newInstance(Native Method)at android.view.LayoutInflater.createView(LayoutInflater.java:619)at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:764) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704) at android.view.LayoutInflater.inflate(LayoutInflater.java:492) at android.view.LayoutInflater.inflate(LayoutInflater.java:423) at pers.hl.module_login.databinding.LoginActivityLoginBinding.inflate(LoginActivityLoginBinding.java:70) at pers.hl.module_login.databinding.LoginActivityLoginBinding.inflate(LoginActivityLoginBinding.java:64) at java.lang.reflect.Method.invoke(Native Method) at pers.hl.common.base.BaseVBActivity.initRootView(BaseVBActivity.kt:48) at pers.hl.common.base.BaseVBActivity.init(BaseVBActivity.kt:32) at pers.hl.common.base.BaseVBActivity.onCreate(BaseVBActivity.kt:27) at pers.hl.common.base.BaseVBVMActivity.onCreate(BaseVBVMActivity.kt:23) at android.app.Activity.performCreate(Activity.java:6237) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) at android.app.ActivityThread.-wrap11(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5417) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) Caused by: java.lang.OutOfMemoryError: Failed to allocate a 98724108 byte allocation with 1951802 free bytes and 93MB until OOMat dalvik.system.VMRuntime.newNonMovableArray(Native Method)at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:609)at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:444)at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:1080)at android.content.res.Resources.loadDrawableForCookie(Resources.java:2635)at android.content.res.Resources.loadDrawable(Resources.java:2540)at android.content.res.TypedArray.getDrawable(TypedArray.java:870)at android.view.View.<init>(View.java:3948)at android.view.ViewGroup.<init>(ViewGroup.java:573)at android.view.ViewGroup.<init>(ViewGroup.java:569)at android.view.ViewGroup.<init>(ViewGroup.java:565)at androidx.constraintlayout.widget.ConstraintLayout.<init>(ConstraintLayout.java:568)at java.lang.reflect.Constructor.newInstance(Native Method) at android.view.LayoutInflater.createView(LayoutInflater.java:619) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:764) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704) at android.view.LayoutInflater.inflate(LayoutInflater.java:492) at android.view.LayoutInflater.inflate(LayoutInflater.java:423) at pers.hl.module_login.databinding.LoginActivityLoginBinding.inflate(LoginActivityLoginBinding.java:70) at pers.hl.module_login.databinding.LoginActivityLoginBinding.inflate(LoginActivityLoginBinding.java:64) at java.lang.reflect.Method.invoke(Native Method) at pers.hl.common.base.BaseVBActivity.initRootView(BaseVBActivity.kt:48) at pers.hl.common.base.BaseVBActivity.init(BaseVBActivity.kt:32) at pers.hl.common.base.BaseVBActivity.onCreate(BaseVBActivity.kt:27) at pers.hl.common.base.BaseVBVMActivity.onCreate(BaseVBVMActivity.kt:23) at android.app.Activity.performCreate(Activity.java:6237) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) at android.app.ActivityThread.-wrap11(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5417) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

3.分析

开始就是一顿花里胡哨的瞎分析，因为我这里是反射调用ViewBinding的inflate方法，就去各种改代码，然并卵。。。

简单查看后，抓住一句重要的信息：Caused by: android.view.InflateException: Binary XML file line #2: Binary XML file line #2: Error inflating class <unknown>

这意思可不就是在我的页面布局xml文件里面第二行报错么，于是打开了我的布局，第二行就是个ConstraintLayout呀，没啥特别的。

又着急了，谷哥度娘问了一圈，多方查阅资料，有告诉我是啥drawable资源没放对位置的原因，有说是自定义view没写对的原因，还有啥删除v24的文件夹之类的。最后就把此布局只保留一个根layout，然，无果。。。

实在想不通啊，又到群里找大佬帮忙，可惜大佬没理我。

最后冷静下来，仔细看了看布局，这不起眼的一行引起了我的注意：

点开一看，这是一个.jpg格式的图片，我放在drawable下面的。

4.解决

结合上面报错最后一个原因跟loadDrawable有点关系，抱着试试看的态度删除此行。

然后，好了，神奇的Android世界。。

5.原理

最后还是没想通是为啥，自己分析可能是不同版本的inflate方法差异，想去看源码，时间不允许，就留到下次吧。