Android 10 Activity onCreate 崩溃

Question

除了我最近更新的 Android 10 设备外，我的应用的启动活动在所有设备上都运行良好。

这是我的代码：

public class SplashScreen extends AppCompatActivity {
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    if(FirebaseAuth.getInstance().getUid() != null)
      startActivity(new Intent(this, HomeActivity.class));
    else
      startActivity(new Intent(this, LoginActivity.class));

    finish();
  }

}

我也尝试过直接导航到HomeActiviy 或LoginActivity，但当我尝试在 Android 10 设备上运行时仍然崩溃

Error occurs when calling super.onCreate(savedInstanceState)

2020-01-17 13:58:25.527 23561-23561/? E/AndroidRuntime: FATAL EXCEPTION: main
    Process: rickroydaban.projects.android.memorise, PID: 23561
    java.lang.RuntimeException: Unable to start activity ComponentInfo{rickroydaban.projects.android.memorise/rickroydaban.android.memorise.ui.SplashScreen}: java.lang.NullPointerException: Attempt to invoke virtual method 'void androidx.lifecycle.ReportFragment.setProcessListener(androidx.lifecycle.ReportFragment$ActivityInitializationListener)' on a null object reference
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3448)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3595)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2147)
        at android.os.Handler.dispatchMessage(Handler.java:107)
        at android.os.Looper.loop(Looper.java:237)
        at android.app.ActivityThread.main(ActivityThread.java:7811)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1076)
     Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void androidx.lifecycle.ReportFragment.setProcessListener(androidx.lifecycle.ReportFragment$ActivityInitializationListener)' on a null object reference
        at androidx.lifecycle.ProcessLifecycleOwner$3.onActivityCreated(ProcessLifecycleOwner.java:162)
        at android.app.Application.dispatchActivityCreated(Application.java:392)
        at android.app.Activity.dispatchActivityCreated(Activity.java:1232)
        at android.app.Activity.onCreate(Activity.java:1513)
        at androidx.core.app.ComponentActivity.onCreate(ComponentActivity.java:81)
        at androidx.activity.ComponentActivity.onCreate(ComponentActivity.java:149)
        at androidx.fragment.app.FragmentActivity.onCreate(FragmentActivity.java:313)
        at androidx.appcompat.app.AppCompatActivity.onCreate(AppCompatActivity.java:106)
        at rickroydaban.android.memorise.ui.SplashScreen.onCreate(SplashScreen.java:18)
        at android.app.Activity.performCreate(Activity.java:7955)
        at android.app.Activity.performCreate(Activity.java:7944)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1307)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3423)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3595) 
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83) 
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2147) 
        at android.os.Handler.dispatchMessage(Handler.java:107) 
        at android.os.Looper.loop(Looper.java:237) 
        at android.app.ActivityThread.main(ActivityThread.java:7811) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1076) 

有人能解决this 的问题吗？

Answer 1

根据this issue，这将在使用lifecycle-runtime:2.2.0（通常通过对Fragment 或AppCompat 的传递依赖）和lifecycle-process:2.1.0（通常通过对lifecycle-extensions 的传递依赖）时发生。

该错误中有许多可用的解决方法：

您执行以下任一操作：

• 添加对lifecycle-process:2.2.0-alpha05 的显式依赖以引入与lifecycle-runtime:2.2.0-alpha05 兼容的新版本
• 将您的 lifecycle:extensions 依赖项升级为 2.2.0-alpha05，以便升级 lifecycle-process
• 完全删除 lifecycle:extensions 依赖项并仅使用您需要的生命周期库（例如，如果您需要 ViewModel，请使用 lifecycle-viewmodel-ktx），这样您根本就不会拉入 lifecycle-process

或者，由于兼容性问题已在更高版本中修复，如果您直接依赖 Lifecycle，请升级到更高版本的 Fragments（版本 1.2.0-beta01 或更高版本）或 Lifecycle 2.2.0-beta01 或更高版本。