Question

我正在申请。在这个应用程序中，我有一个包含listView的片段。当我点击任何项目时，它应该启动一个显示项目网站的新片段。我的listView片段代码：

 public class MyFragment extends Fragment {


private ListView mListViewASSociation;
private ListViewAssociationAdapter mListViewAssociationAdapter;
private ArrayList<ListViewAssociations> mlistviewlist;

private ProgressDialog progressDialog;




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


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View rootView = inflater.inflate(R.layout.fragment_mwl_associations, container, false);
    mListViewASSociation = (ListView) rootView.findViewById(R.id.association_list);
    mlistviewlist = new ArrayList<ListViewAssociations>();
    String[] mAssciation_Name ;
    final String Webs[];
    TypedArray Icons ;
    mAssciation_Name = getResources().getStringArray(R.array.Association_names);
    Webs = getResources().getStringArray(R.array.Association_websites) ;


    Icons = getResources().obtainTypedArray(R.array.Association_icons);
    ListViewAssociations MyTitle ;

    for(int i = 0 ; i<mAssciation_Name.length ; i++) {
        MyTitle = new ListViewAssociations(mAssciation_Name[i],Icons.getResourceId(i,R.drawable.ic_launcher));
        mlistviewlist.add(MyTitle);
    }

    mListViewAssociationAdapter = new ListViewAssociationAdapter(getActivity(),mlistviewlist);
    mListViewASSociation.setAdapter(mListViewAssociationAdapter);

这里我正在处理点击项目

    mListViewASSociation.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position,
                                long id) {
            BlankFragment myFragment = new BlankFragment();
            FragmentManager fragmentManager = getFragmentManager();
            FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
            fragmentTransaction.replace(R.layout.fragment_mwl_associations, myFragment);
            fragmentTransaction.addToBackStack(null);
            fragmentTransaction.commit();

        }
    });

    return rootView ;



}

我的空白片段叫做：

public class BlankFragment extends Fragment {


private ProgressDialog progressDialog;

WebView myWebView;
private String URL  ;
public BlankFragment() {
    // Required empty public constructor

}

public void setURL(String URL) {
    this.URL = URL;
}

public String getURL() {
    return URL;
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View rootView = inflater.inflate(R.layout.fragment_blank, container, false);

    WebView myWebView = (WebView) rootView.findViewById(R.id.frag_blank);
    myWebView.setWebViewClient(new WebViewClient());
    myWebView.getSettings().setBuiltInZoomControls(true);
    myWebView.requestFocusFromTouch();
    myWebView.setVerticalScrollBarEnabled(true);
    myWebView.setHorizontalScrollBarEnabled(true);
    myWebView.setVerticalScrollBarEnabled(true);
    myWebView.setHorizontalScrollBarEnabled(true);
    myWebView.requestFocusFromTouch();
    myWebView.getSettings().setJavaScriptEnabled(true);
    myWebView.getSettings().setUseWideViewPort(true);
    myWebView.getSettings().setLoadWithOverviewMode(true);

    myWebView.addJavascriptInterface(new WebAppInterface(getActivity()), "Android");

    myWebView.getSettings().setJavaScriptEnabled(true);
    myWebView.loadUrl("www.google.com");
    new LoadViewTask().execute();
    return rootView ;
}

当我点击某个项目时，我的应用程序崩溃了。错误在哪里？

Answer 1

您在此行onItemClick()中所犯的错误：变化

fragmentTransaction.replace(R.layout.fragment_mwl_associations, myFragment);

到

fragmentTransaction.replace(R.id.container, myFragment);

在这里，您为替换输入了错误的布局ID，而是添加FrameLayout容器ID R.id.container，用于在fragment中添加MainActivity.java。< / p>

参考链接会更有帮助： Fragments Basics

Answer 2

删除＆＃34; fragmentTransaction.addToBackStack（null）;＆＃34;可能有帮助。正如Scott所提到的，logcat堆栈（错误列表）会很有帮助。

如何从片段

2 个答案: