新工程嵌入的时候，报Attempt to invoke virtual method 'android.content.pm.ApplicationInfo android.content.Context.getApplicationInfo()' on a null object reference

[JackyKeke]

Process: com.example.multilanguage2, PID: 22233 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.multilanguage2/com.example.multilanguage2.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.pm.ApplicationInfo android.content.Context.getApplicationInfo()' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3430) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3614) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:86) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2199) at android.os.Handler.dispatchMessage(Handler.java:112) at android.os.Looper.loop(Looper.java:216) at android.app.ActivityThread.main(ActivityThread.java:7625) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:987) Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.pm.ApplicationInfo android.content.Context.getApplicationInfo()' on a null object reference at android.content.ContextWrapper.getApplicationInfo(ContextWrapper.java:159) at android.app.FragmentManagerImpl.getTargetSdk(FragmentManager.java:2978) at android.app.FragmentManagerImpl.attachController(FragmentManager.java:2967) at android.app.FragmentController.attachHost(FragmentController.java:86) at android.app.Activity.attach(Activity.java:7366)

[JackyKeke]

android { compileSdkVersion 29 buildToolsVersion "29.0.3"

defaultConfig {
    applicationId "com.example.multilanguage2"
    minSdkVersion 16
    targetSdkVersion 27}

}