Android:NetworkInfo.isConnected()上的NullPointerException与Firebase

Question

有时,在不同的手机(Android 7)上会出现这种情况:

Fatal Exception: java.lang.RuntimeException: Error receiving broadcast Intent { act=android.net.conn.CONNECTIVITY_CHANGE flg=0x4000010 (has extras) } in com.google.firebase.iid.zzae@3c68978
       at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:1178)
       at android.os.Handler.handleCallback(Handler.java:751)
       at android.os.Handler.dispatchMessage(Handler.java:95)
       at android.os.Looper.loop(Looper.java:154)
       at android.app.ActivityThread.main(ActivityThread.java:6321)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.net.NetworkInfo.isConnected()' on a null object reference
       at com.google.firebase.iid.zzad.zzchr(Unknown Source)
       at com.google.firebase.iid.zzae.onReceive(Unknown Source)
       at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:1163)
       at android.os.Handler.handleCallback(Handler.java:751)
       at android.os.Handler.dispatchMessage(Handler.java:95)
       at android.os.Looper.loop(Looper.java:154)
       at android.app.ActivityThread.main(ActivityThread.java:6321)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)

你以前见过这个错误吗？我不知道如何纠正这个错误......

非常感谢你们!

Answer 1

final boolean zzchr() {
    ConnectivityManager var1;
    return (var1 = (ConnectivityManager)this.getContext().getSystemService("connectivity")) != null && var1.getActiveNetworkInfo() != null && var1.getActiveNetworkInfo().isConnected();
}

这是 zzchr 的代码。已经为 getActiveNetworkInfo 添加了 null 检查，但您仍然收到 NPE。

您可以在这里检查 NPE 的其他可能性。希望能帮助到你。