NullPointerException ‘android.view.Window$Callback android.view.Window.getCallback()‘
NullPointerException ‘android.view.Window$Callback android.view.Window.getCallback()’
现象
通过studio直接debug没有任何异常
但是打包后安装运行部分页面出现一个空指针异常android.view.Window$Callback android.view.Window.getCallback()
问题排查解决
直接度娘搜索发现网上大牛基本给的是在activity设置内容视图setContentView之前使用了findViewById查找视图导致的上述异常。但是我的异常日志里没有findViewById相关记录同时我注销了所有视图查找使用并重新打包尝试，发现异常还是存在。后思索最近项目配置有无改动，发现修改了一个realm相关插件，后尝试回退该插件版本再次打包测试，最终问题得以解决。
问题日志
java.lang.RuntimeException: Unable to start activity ComponentInfo{*}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.Window$Callback android.view.Window.getCallback()' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3782)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3961)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:91)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:149)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:103)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2386)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:213)
at android.app.ActivityThread.main(ActivityThread.java:8178)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1101)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.Window$Callback android.view.Window.getCallback()' on a null object reference
at androidx.appcompat.app.AppCompatDelegateImpl.attachToWindow(AppCompatDelegateImpl.java:861)
at androidx.appcompat.app.AppCompatDelegateImpl.ensureWindow(AppCompatDelegateImpl.java:848)
at androidx.appcompat.app.AppCompatDelegateImpl.onCreate(AppCompatDelegateImpl.java:555)
at androidx.appcompat.app.AppCompatActivity$2.onContextAvailable(AppCompatActivity.java:133)
at androidx.activity.contextaware.ContextAwareHelper.dispatchOnContextAvailable(ContextAwareHelper.java:99)
at androidx.activity.ComponentActivity.onCreate(ComponentActivity.java:362)
at androidx.fragment.app.FragmentActivity.onCreate(FragmentActivity.java:273)
at *.onCreate(*.java:108)
at *.onCreate(*.java:182)
at android.app.Activity.performCreate(Activity.java:8086)
at android.app.Activity.performCreate(Activity.java:8074)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1313)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3755)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3961)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:91)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:149)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:103)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2386)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:213)
at android.app.ActivityThread.main(ActivityThread.java:8178)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1101)
导致异常的插件
classpath "io.realm:realm-gradle-plugin:10.14.0-transformer-api"