Question

为什么我的活动“inflater and container”没有解决？我该怎么写呢？

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;

public class GamesFragment extends Fragment {

private ProgressBar progress;
private WebView myWebView;


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    myUIUpdate();
    return null;
}

private void myUIUpdate() {
    View rootView = inflater.inflate(R.layout.fragment_games, container, false);


    String url = "http://gsmarena.com";
    myWebView = (WebView) rootView.findViewById(R.id.webViewGames);
    myWebView.setWebChromeClient(new myWebViewClient());
    myWebView.getSettings().setJavaScriptEnabled(true);
    progress = (ProgressBar) rootView.findViewById(R.id.progressBar);
    myWebView.loadUrl(url);
    progress.setMax(100);


    myWebView.setWebViewClient(new WebViewClient() {

        @Override
        public boolean shouldOverrideUrlLoading(WebView View, String url) {
            View.loadUrl(url);
            GamesFragment.this.progress.setProgress(0);
            return true;
        }

    });


    myWebView.setOnKeyListener(new android.view.View.OnKeyListener()

    {
        @Override
        public boolean onKey(View v, int keyCode, KeyEvent event) {
            if (event.getAction() == KeyEvent.ACTION_DOWN) {
                WebView webView = (WebView) v;

                switch (keyCode) {
                    case KeyEvent.KEYCODE_BACK:
                        if (webView.canGoBack()) {
                            webView.goBack();
                            return true;
                        }
                        break;
                }
            }

            return false;
        }
    });
    return rootView;

}


private class myWebViewClient extends WebChromeClient {
    @Override
    public void onProgressChanged(WebView view, int newProgress) {
        GamesFragment.this.setValue(newProgress);
        super.onProgressChanged(view, newProgress);
    }
}

@Override
public void setUserVisibleHint(boolean visible) {
    super.setUserVisibleHint(visible);
    if (visible && isResumed()) {
        myUIUpdate();
    }
}

public void setValue(int progress) {
    this.progress.setProgress(progress);
}


}

我正在尝试附加myUIUdate，因为要隐藏我的片段，当它在屏幕上看不到时使用它：

@Override
public void setUserVisibleHint(boolean visible) {
    super.setUserVisibleHint(visible);
    if (visible && isResumed()) {
        myUIUpdate();
    }
    }

PS：如果有人有更好的想法隐藏片段我喜欢听。

Answer 1

改变：

   private void myUIUpdate()

到

   private void myUIUpdate(LayoutInflater inflater, ViewGroup container)

并将inflater和容器传递给它：

   myUIUpdate(inflater, container);

Answer 2

在myUIUpdate()方法中没有找到inflater和container。在onCreateView中写下myUIUpdate（）;如

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

并更改（也改为return type）为

private void myUIUpdate() {

到

private View myUIUpdate(LayoutInflater inflater, ViewGroup container) {

修改在onViewCreated方法中写下myUIUpdate，然后从onCreateView删除

@Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_games, container, false); return rootView; } @Override public void onViewCreated(View view, @Nullable Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); myUIUpdate(view); }

并将myUIUpdate方法重写为

private void myUIUpdate(View view) { String url = "http://gsmarena.com"; myWebView = (WebView) view.findViewById(R.id.webViewGames); myWebView.setWebChromeClient(new myWebViewClient()); myWebView.getSettings().setJavaScriptEnabled(true); progress = (ProgressBar) view.findViewById(R.id.progressBar); myWebView.loadUrl(url); progress.setMax(100); myWebView.setWebViewClient(new WebViewClient() { @Override public boolean shouldOverrideUrlLoading(WebView View, String url) { View.loadUrl(url); GamesFragment.this.progress.setProgress(0); return true; } }); myWebView.setOnKeyListener(new android.view.View.OnKeyListener() {@Override public boolean onKey(View v, int keyCode, KeyEvent event) { if (event.getAction() == KeyEvent.ACTION_DOWN) { WebView webView = (WebView) v; switch (keyCode) { case KeyEvent.KEYCODE_BACK: if (webView.canGoBack()) { webView.goBack(); return true; } break; } } return false; } }); }

Answer 3

LayoutInflater inflater，ViewGroup容器，Bundle savedInstanceState这些是您使用的块的本地

Answer 4

无需创建自定义方法来初始化片段中布局的所有视图，尝试覆盖onViewCreated并将我的所有UI Update（）代码移动到onViewCreated。

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

    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        myWebView = (WebView) view.findViewById(R.id.webViewGames);
        myWebView.setWebChromeClient(new myWebViewClient());
        myWebView.getSettings().setJavaScriptEnabled(true);
        progress = (ProgressBar) view.findViewById(R.id.progressBar);
        myWebView.loadUrl(url);
        progress.setMax(100);


        myWebView.setWebViewClient(new WebViewClient() {

            @Override
            public boolean shouldOverrideUrlLoading(WebView View, String url) {
                View.loadUrl(url);
                GamesFragment.this.progress.setProgress(0);
                return true;
            }

        });


        myWebView.setOnKeyListener(new android.view.View.OnKeyListener()

        {
            @Override
            public boolean onKey(View v, int keyCode, KeyEvent event) {
                if (event.getAction() == KeyEvent.ACTION_DOWN) {
                    WebView webView = (WebView) v;

                    switch (keyCode) {
                        case KeyEvent.KEYCODE_BACK:
                            if (webView.canGoBack()) {
                                webView.goBack();
                                return true;
                            }
                            break;
                    }
                }

                return false;
            }
        });
    }

Answer 5

您在

中获得inflater和container

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    myUIUpdate();
    return null;
}

他们在那里当地人。您必须将它们作为参数传递给myUIUpdate或在Activity内声明字段并将其分配到onCreateView内（这是一个难看的解决方案）。

无法解决inflater和容器问题

5 个答案: