androidx.annotation.Nullable; import androidx.appcompat.app.AppCompatActivity; import androidx.loader.app.LoaderManager

首先需要得到显示图片的Activity或Fragment的LoaderManager，这个Activity或Fragment是LoaderManager的拥有者。

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:NosupermethodgetLifecycle()Landroidx/lifecycle/Lifecycle;inclassLandroidx/core/app/ComponentActivity;oritssuperclasses(declarationof'androidx.core.app.ComponentActivity'appearsin/data/app/com.example.alipay.imagepicker-KPW8yioUDqJols6T4OTwpg==/base.apk)    atandroidx.fragment.app.FragmentActivity.getLifecycle(FragmentActivity.java:324)    atandroidx.lifecycle.LiveData.observe(LiveData.java:172)    atandroidx.loader.app.LoaderManagerImpl$LoaderInfo.setCallback(LoaderManagerImpl.java:100)    atandroidx.loader.app.LoaderManagerImpl.createAndInstallLoader(LoaderManagerImpl.java:400)    atandroidx.loader.app.LoaderManagerImpl.initLoader(LoaderManagerImpl.java:421)    atcom.example.alipay.imagepicker.PickerActivity.initLoadManager(PickerActivity.java:44)    atcom.example.alipay.imagepicker.PickerActivity.onCreate(PickerActivity.java:25)    atandroid.app.Activity.performCreate(Activity.java:8085)    atandroid.app.Activity.performCreate(Activity.java:8073)    atandroid.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1320)    atandroid.app.ActivityThread.performLaunchActivity(ActivityThread.java:3868)    atandroid.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4074)    atandroid.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:91)    atandroid.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:149)    atandroid.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:103)    atandroid.app.ActivityThread$H.handleMessage(ActivityThread.java:2473)    atandroid.os.Handler.dispatchMessage(Handler.java:110)    atandroid.os.Looper.loop(Looper.java:219)    atandroid.app.ActivityThread.main(ActivityThread.java:8347)    atjava.lang.reflect.Method.invoke(NativeMethod)    atcom.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513)    atcom.android.internal.os.ZygoteInit.main(ZygoteInit.java:1055)

这是什么意思啊各位大佬

importandroidx.annotation.Nullable;importandroidx.appcompat.app.AppCompatActivity;importandroidx.loader.app.LoaderManager

publicclassInnerHolderextendsRecyclerView.ViewHolder{publicInnerHolder(@NonNullViewitemView){super(itemView);}}}运行结果用LoaderManager