Question

当我运行我的应用程序时，一切正常，直到我需要将片段替换为另一个片段。当用户单击列表视图中的某个项目时，它应该打开新布局（新片段）。但就目前而言，当我点击该项目

时没有任何反应

这是我的onCreate方法

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy);


        JsonArrayRequest tournamentReq = new JsonArrayRequest(url,
                new Response.Listener<JSONArray>() {
                    @Override
                    public void onResponse(JSONArray response) {
                        Log.d(TAG, response.toString());

                        // Parsing json
                        for (int i = 0; i < response.length(); i++) {
                            try {

                                JSONObject obj = response.getJSONObject(i);
                                Tournament tournament = new Tournament();
                                tournament.setTitle(obj.getString("title"));
                                tournament.setThumbnailUrl(obj.getString("image"));
                                tournament.setDate(((Number) obj.get("tdate"))
                                        .doubleValue());
                                // Genre is json array
                                JSONArray categoryArry = obj.getJSONArray("category");
                                ArrayList<String> category = new ArrayList<String>();
                                for (int j = 0; j < categoryArry.length(); j++) {
                                    category.add((String) categoryArry.get(j));
                                }
                                tournament.setCategory(category);

                                // adding tournament to tournament array
                                TournamentList.add(tournament);

                            } catch (JSONException e) {
                                e.printStackTrace();
                            }

                        }
                        adapter.notifyDataSetChanged();
                    }
                }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                VolleyLog.d(TAG, "Error: " + error.getMessage());
            }
        });

    AppController.getInstance().addToRequestQueue(tournamentReq);
        }

这是我在

中的onCreateView和OnSelectionChanged方法

TournamentFragment

        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_tournament, container, false);
        listView = (ListView) rootView.findViewById(android.R.id.list);

        if (rootView.findViewById(R.id.frag_tour) != null){

        if (savedInstanceState != null) {
            // Create an Instance of Fragment
            TournamentFragment tFragment = new TournamentFragment();
            tFragment.setArguments(getActivity().getIntent().getExtras());
            getFragmentManager().beginTransaction()
                    .add(R.id.frag_tour, tFragment)
                    .commit();
        }}return rootView;
}

    public void OnSelectionChanged(int versionNameIndex) {

    DescriptionFragment descriptionFragment = new DescriptionFragment();
    descriptionFragment.setArguments(getActivity().getIntent().getExtras());

    if (descriptionFragment != null){
        descriptionFragment.setDescription(versionNameIndex);
    } else {
        TournamentFragment tFragment = new TournamentFragment();

        fragmentTransaction.replace(R.id.fragment_container, tFragment);
        fragmentTransaction.commit();
    }
}

fragment_description.xml

 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:id="@+id/fragment_container">

 <TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceMedium"
    android:text="This is where each individual description will appear"
    android:id="@+id/version_description"
    android:layout_centerVertical="true"
    android:layout_centerHorizontal="true"
    android:layout_marginLeft="@dimen/activity_horizontal_margin"
    android:layout_marginRight="@dimen/activity_horizontal_margin"
    android:gravity="center"/>

</RelativeLayout>

到目前为止，我曾尝试过在stackoverflow中回答的不同类型的解决方案，但仍然无法解决我的问题。有人能帮助我理解这个吗？

Answer 1

使用以下代码

getSupportFragmentManager()
                .beginTransaction()
                .detach(contentFragment) // detach the current fragment
                .attach(contentFragment) // attach fragment that you want.
                .commit();

Answer 2

尝试通过

进行通话

getActivity().getSupportFragmentManager()
            .beginTransaction()
            .replace(R.id.fragment_container, tFragment)
            .fragmentTransaction
            .commit();

Android - 布局保留在当前片段中

2 个答案: