android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private methodEXCEPTION: main java.lang.NullPointerException: Attemptto invokevirtualmeth
在从firebase DB读取数据时,我遇到了一个错误,我试图允许使用MAC地址登录:java.lang.NullPointerException: Attempt to invokevirtualmethod 'booleanjava.lang.String.equals(java.lang.Object)' on a null object reference
这是我的密码
prog1.dismiss();java.lang.NullPointerException: Attemptto invokevirtualmethod 'booleanjava.lang.String.equals(java.lang.Object)' on a null object referencejava.lang.NullPointerException: Attempt<
to invokevirtualmethod 'booleanjava.lang.String.equals(java.lang.Object)' on a null object referenceLooper.java:164) at java.lang.reflect.Method.invoketo <
unnion.neelay.beatbox/unnion.neelay.beatbox.ringdroid.RingdroidSelectActivity}: java.lang.NullPointerException: Attemptto invokevirtualmethod 'booleanjava.lang.String.equals(java.lang.Object)' on a null object referenceActivityT
to invokevirtualmethod 'booleanjava.lang.String.equals(java.lang.Object)' on a null object referenceat android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Metho
Toast.LENGTH_SHORT).show();但是,我收到以下错误消息:java.lang.NullPointerException: Attemptto invokevirtualmethod 'booleanjava.lang.String.equals(java.lang.Object)' on a null object reference(Looper.java:135)
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