日志如下
2021-04-23 10:24:21.939 8746-8746/com.example.a6_5 E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.a6_5, PID: 8746
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.a6_5/com.example.a6_5.MainActivity}: android.view.InflateException: Binary XML file line #2 in com.example.a6_5:layout/activity_main: Binary XML file line #2 in com.example.a6_5:layout/activity_main: Error inflating class LinearLayoutLayout
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3449)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3601)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
Caused by: android.view.InflateException: Binary XML file line #2 in com.example.a6_5:layout/activity_main: Binary XML file line #2 in com.example.a6_5:layout/activity_main: Error inflating class LinearLayoutLayout
Caused by: android.view.InflateException: Binary XML file line #2 in com.example.a6_5:layout/activity_main: Error inflating class LinearLayoutLayout
Caused by: java.lang.ClassNotFoundException: android.view.LinearLayoutLayout
at java.lang.Class.classForName(Native Method)
at java.lang.Class.forName(Class.java:454)
at android.view.LayoutInflater.createView(LayoutInflater.java:813)
at android.view.LayoutInflater.createView(LayoutInflater.java:774)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:911)
at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:68)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:928)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:948)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:1002)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:959)
at android.view.LayoutInflater.inflate(LayoutInflater.java:657)
at android.view.LayoutInflater.inflate(LayoutInflater.java:532)
at android.view.LayoutInflater.inflate(LayoutInflater.java:479)
at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:555)
at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:161)
at com.example.a6_5.MainActivity.onCreate(MainActivity.java:27)
at android.app.Activity.performCreate(Activity.java:8000)
at android.app.Activity.performCreate(Activity.java:7984)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1309)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3422)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3601)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
2021-04-23 10:24:21.939 8746-8746/com.example.a6_5 E/AndroidRuntime: Caused by: java.lang.ClassNotFoundException: Didn't find class "android.view.LinearLayoutLayout" on path: DexPathList[[zip file "/data/app/~~OfrWTmg8pNr73IQ9sJ0qog==/com.example.a6_5-gEmUVEW2FUmRu0ZfKrxMag==/base.apk"],nativeLibraryDirectories=[/data/app/~~OfrWTmg8pNr73IQ9sJ0qog==/com.example.a6_5-gEmUVEW2FUmRu0ZfKrxMag==/lib/x86, /system/lib, /system_ext/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:207)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
... 31 more
检查下你的XML布局文件，是不是有什么东西写错了
安卓的 xml 文件布局优点是声明式编程、可视化等，缺点就是编译检查太弱，太容易出现 InflateException。
一般这种 InflateException 错误都是 xml 文件中的某个控件的路径、属性错误导致的，当然也不排除一些匪夷所思问题比如：https://blog.csdn.net/zhaizu/article/details/106380880?spm=1001.2014.3001.5501。
根据堆栈报错，应该是 activity_main.xml 里面的第2行 LinearLayout 被误写成了 LinearLayoutLayout