小编B.G*_*rgr的帖子

当我从配置文件片段切换到另一个片段时，应用程序崩溃。我不知道如何解决它。我不知道该怎么做，因为我是 android 新手。我在等你的帮助

调试控制台：

E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.bg.askandtalk, PID: 21676
java.lang.NullPointerException: You cannot start a load on a not yet attached View or a Fragment where getActivity() returns null (which usually occurs when getActivity() is called before the Fragment is attached or after the Fragment is destroyed).
    at com.bumptech.glide.util.Preconditions.checkNotNull(Preconditions.java:31)
    at com.bumptech.glide.Glide.getRetriever(Glide.java:675)
    at com.bumptech.glide.Glide.with(Glide.java:707)
    at com.bg.askandtalk.Fragments.ProfileFragment$1.onDataChange(ProfileFragment.java:83)
    at com.google.android.gms.internal.firebase_database.zzfc.zza(Unknown Source:13)
    at com.google.android.gms.internal.firebase_database.zzgx.zzdr(Unknown Source:2)
    at com.google.android.gms.internal.firebase_database.zzhd.run(Unknown Source:71)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at …