Android获取活动片段的视图 [英] Android get view of fragment in activity

问题描述

我有一个活动，我们称它为 A ，它会像这样启动一个片段:

I have an activity, let's call it A, and it launches a fragment like so:

remoteFragment = new RemoteFragment();
getSupportFragmentManager()
        .beginTransaction()
        .replace(R.id.frameLayout_remote_activity, remoteFragment)
        .commit();

我的 remoteFragment 看起来像这样:

public Button okBtn;

public RemoteFragment() {
    // Required empty public constructor
}

@Override
public View onCreateView(LayoutInflater inflater, final ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View view = inflater.inflate(R.layout.fragment_remote, container, false);
    okBtn= view.findViewById(R.id.okBtn);

    return view;
}

public RemoteLayoutView getOkBtn() {
    return okBtn;
}

在我的活动中，我试图像这样:

and in my activity I am trying to get it like so:

Button okBtnMessageNotWorking = remoteFragment.getOkBtn();

但是 okBtnMessageNotWorking 始终为空.

我的问题是如何从活动内部的片段中获取视图对象?

my question is how can I get the view objects from the fragment inside my activity?

推荐答案

在这里，您正在尝试从 layoutOnTopScrollview 查找视图.相反，您应该从展开视图中找到 okBtn .请按如下所示更改代码:

Here, you are trying to find the view from layoutOnTopScrollview. Instead you should find the okBtn from inflated view. Please change code as below:

@Override
public View onCreateView(LayoutInflater inflater, final ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View view = inflater.inflate(R.layout.fragment_remote, container, false);
    okBtn= view.findViewById(R.id.okBtn);

    return view;
}

此外，请确保在创建片段后正在调用此方法.

Also, make sure that you are calling this method once the fragment is created.

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