Java Android：如何在 OnItemClickListener() 中调用 getActivity()？
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Android: How to call getActivity() in OnItemClickListener()?
提问by user2212461
I am trying to call getActivity() in the OnItemClickListener:
我正在尝试在 OnItemClickListener 中调用 getActivity()：
class ViewTest{ //called in a fragment
setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int p, long i) {
((MainActivity) getActivity()).makeResultsbarVisible();
...
}
});
}
}
In the fragment, the class is instantiated as:
在片段中，类被实例化为：
ViewTest editTest = new ViewTest(this);
But I get an error that I cannot fix:
但是我收到一个无法修复的错误：
The method getActivity() is undefined for the type new AdapterView.OnItemClickListener(){}
How can I call getActivity inside onItemClick()? Thanks.
如何在 onItemClick() 中调用 getActivity？谢谢。
采纳答案by Apoorv
You can only use getActivityinside a Fragmentclass or one extending it. If your onItemClickListeneris in an Activityuse MainActivity.this
您只能getActivity在Fragment类中使用或扩展它。如果您onItemClickListener正在Activity使用MainActivity.this
回答by Mitesh Shah
Use Class_name.thisor define a Contextvariable. and then call your makeResultsbarVisible()by using Contextvariable,
使用Class_name.this或定义一个Context变量。然后makeResultsbarVisible()使用Context变量调用你的，
Like,
喜欢，
Context c = this;
c.makeResultsbarVisible();
