本文介绍了片段中的Android Snackbar NullPointerException的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想在我的应用程序中添加一个基本的快餐栏,但是我收到一个错误,我不知道为什么.
I want to add a basic snackbar to my application but i have received an error that i couldn't figure out why.
我在Fragment的onCreateView()方法中添加了此代码.
I added this code in the onCreateView() method in my Fragment.
Snackbar.make(view, "Snackbar", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
并收到此错误:
06-01 10:26:09.955 1232-1232/? E/ActivityThread﹕ Failed to find provider info for me.muraterdogan.watchme.MetricaContentProvider
06-01 10:26:10.075 1232-1447/? E/ActivityThread﹕ Failed to find provider info for me.muraterdogan.watchme.YPLContentProvider
06-01 10:33:55.044 6646-6646/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: me.muraterdogan.watchme, PID: 6646
java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.Context android.view.ViewGroup.getContext()' on a null object reference
at android.support.design.widget.Snackbar.<init>(Snackbar.java:116)
at android.support.design.widget.Snackbar.make(Snackbar.java:140)
at me.muraterdogan.watchme.fragments.TrendingFragment.GetData(TrendingFragment.java:90)
at me.muraterdogan.watchme.fragments.TrendingFragment.onCreateView(TrendingFragment.java:83)
...
推荐答案
如果将片段添加到现有活动中(请记住,您可以通过xml添加它),则应将SnackBar的方法调用到片段的onActivityCreated()方法中
If your Fragment is added to existing activity(Remember you can add it through xml), you should call the SnackBar's method into the onActivityCreated() method of the Fragment.
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Snackbar.make(view, "Snackbar", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
这篇关于片段中的Android Snackbar NullPointerException的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!