截图分别为错误显示的25和44行代码处，应该是44行代码出现了错误，跟着大狙老师做的

错误显示：

 Process: com.example.alipay.imagepicker, PID: 17743

  java.lang.NoSuchMethodError: No super method getLifecycle()Landroidx/lifecycle/Lifecycle; in class Landroidx/core/app/ComponentActivity; or its super classes (declaration of 'androidx.core.app.ComponentActivity' appears in /data/app/com.example.alipay.imagepicker-KPW8yioUDqJols6T4OTwpg==/base.apk)

    at androidx.fragment.app.FragmentActivity.getLifecycle(FragmentActivity.java:324)

    at androidx.lifecycle.LiveData.observe(LiveData.java:172)

    at androidx.loader.app.LoaderManagerImpl$LoaderInfo.setCallback(LoaderManagerImpl.java:100)

    at androidx.loader.app.LoaderManagerImpl.createAndInstallLoader(LoaderManagerImpl.java:400)

    at androidx.loader.app.LoaderManagerImpl.initLoader(LoaderManagerImpl.java:421)

    at com.example.alipay.imagepicker.PickerActivity.initLoadManager(PickerActivity.java:44)

    at com.example.alipay.imagepicker.PickerActivity.onCreate(PickerActivity.java:25)

    at android.app.Activity.performCreate(Activity.java:8085)

    at android.app.Activity.performCreate(Activity.java:8073)

    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1320)

    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3868)

    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4074)

    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:2473)

    at android.os.Handler.dispatchMessage(Handler.java:110)

    at android.os.Looper.loop(Looper.java:219)

    at android.app.ActivityThread.main(ActivityThread.java:8347)

    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:1055)