Android Studio - 片段 onClickListener 不起作用 [英] Android Studio - Fragment onClickListener not working

问题描述

在查看所有可能的答案后，我找不到我的代码有什么问题.

After reviewing every possible answer, I cannot find what's wrong with my code.

我需要在 3 个片段上有一个 OnClickListener，其中一个由 mainActivity 加载.他们都没有工作.我已经在每个片段上实现了 OnClickListener.

I need to have an OnClickListener on 3 fragments, one of them being loaded by the mainActivity. None of them are working. I have implemented the OnClickListener on each fragment.

这是我的代码:

RequestFragment1.java

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

    view = inflater.inflate(R.layout.fragment_request1, container, false);
    Button buttonRequest1 = (Button) view.findViewById(R.id.Request1Button);
    buttonRequest1.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            String url = "https://www.google.ca/";
            WebView httpRequestResult = (WebView) getActivity().findViewById(R.id.webViewResult);
            httpRequestResult.getSettings().setJavaScriptEnabled(false);
            httpRequestResult.loadUrl(url);
            getActivity().setContentView(R.layout.requests_webview);
        }
    });
    return view;
}

fragment_request1.xml

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/relativeLayout1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <Button
        android:id="@+id/Request1Button"
        android:layout_width="match_parent"
        android:layout_height="90dp"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true"
        android:text="Requête 1" />

</RelativeLayout>

MainActivity.java

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.fragment_request1);

    View currentView = findViewById(android.R.id.content);
    //Implementation du TouchListener
    currentView.setOnTouchListener(new SwipeListener(MainActivity.this) {

它需要通过按下 Request1Button 来打开一个 webview.

It needs to open a webview by pressing Request1Button.

感谢您的宝贵时间！

推荐答案

setContentView(R.layout.fragment_request1);

MainActivity.onCreate() 中的这一行扩展了名为 fragment_request1 的 XML 文件中定义的布局.但是，它不会创建一个片段.因此，永远不会调用 RequestFragment1.onCreateView() 并且永远不会设置 OnClickListener.

This line in MainActivity.onCreate() inflates the layout defined in the XML file named fragment_request1. However, it does not create a fragment. Therefore, RequestFragment1.onCreateView() is never called and the OnClickListener is never set.

您需要正确创建片段并使用 FragmentManager 加载它.有许多在线教程展示了如何执行此操作.我建议从 Android 开发者网站上的那个开始.

You need to properly create the fragment and load it with FragmentManager. There are many online tutorials that show how to do this. I suggest starting with the one on the Android Developer website.

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