Question

我正在尝试编写一个Android应用程序，并且似乎所有内容都可以正常工作，只有一行，即“ setContentView”

有没有办法替代上述功能

这是有问题的代码，问题在第 18

行中

public class HiraFragment extends Fragment{

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
    return inflater.inflate(R.layout.fragment_hira,null);
}

WebView web;
ProgressBar progressBar;
ImageView logo;
ImageView bg;
TextView text;

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

    web = (WebView) getView().findViewById(R.id.webView);
    progressBar = (ProgressBar) getView().findViewById(R.id.progressBar);
    logo = (ImageView) getView().findViewById(R.id.logo);
    bg = (ImageView) getView().findViewById(R.id.bg);
    text = (TextView) getView().findViewById(R.id.text);
    web.setWebViewClient(new hira());
    web.loadUrl("http://example.com/");
    web.getSettings().setJavaScriptEnabled(true);


}



public class hira extends WebViewClient {
    @Override
    public void onPageFinished(WebView view, String url) {
        super.onPageFinished(view, url);
        progressBar.setVisibility(View.GONE);
        logo.setVisibility(View.GONE);
        bg.setVisibility(View.GONE);
        text.setVisibility(View.GONE);
    }



    @Override
    public void onPageStarted(WebView view, String url, Bitmap favicon) {

        // TODO Auto-generated method stub
        super.onPageStarted(view, url, favicon);
        progressBar.setVisibility(View.VISIBLE);
        logo.setVisibility(view.VISIBLE);
        bg.setVisibility(view.VISIBLE);
        text.setVisibility(view.VISIBLE);
    }



}

}

该应用程序要做的就是拥有一个底部导航栏并弹出一个加载屏幕，然后在Webview中显示网页

请有人帮忙。预先谢谢你

Answer 1

您创建的类是Fragment，而不是Activity，但是您的onCreate方法看起来像是从Activity复制的。片段中没有setContentView方法。

您将在onCreateView中设置布局，并在onActivityCreated或onCreateView本身中设置其他内容。例如：

@Override
public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_hira, container, false);

    // To access the views, you need to prefix them with the rootView like this
    web = (WebView) rootView.findViewById(R.id.webView);
    progressBar = (ProgressBar) rootView.findViewById(R.id.progressBar);
    logo = (ImageView) rootView.findViewById(R.id.logo);
    bg = (ImageView) rootView.findViewById(R.id.bg);
    text = (TextView) rootView.findViewById(R.id.text); 

    web.setWebViewClient(new hira());
    web.loadUrl("http://example.com/");
    web.getSettings().setJavaScriptEnabled(true);

    return rootView;
}

看看Android片段here指南，或者改用Activity。

如何修复无法解决Android中的方法'setContentView'

1 个答案: