Question

我想知道我们是否可以使用JSON开发标签。我希望尽可能多的标签取决于JSON中的类别，如果有可能，每个标签必须包含列表视图请告诉我如何操作

MainActivity.class

private void catmethod(){
        String url="http://www.souqalkhaleejia.com/webapis/menus.php";
        JsonObjectRequest catreq=new JsonObjectRequest(Request.Method.GET, url, (String) null, new Response.Listener<JSONObject>() {
            @Override
            public void onResponse(JSONObject response) {
                try {
                    JSONArray menuarray=response.getJSONArray("menu");
                    for (int i=0;i<menuarray.length();i++){
                        JSONObject menuobj=menuarray.getJSONObject(i);
                        tabs.addTab(tabs.newTab().setText(menuobj.getString("title")));
                        Toast.makeText(MainActivity.this, menuobj.getString("title"), Toast.LENGTH_SHORT).show();
                    }
                    TabsAdapter tabsAdapter=new TabsAdapter(getSupportFragmentManager(),menuarray.length());
                    viewpager.setAdapter(tabsAdapter);
                    tabs.setupWithViewPager(viewpager);
                } catch (JSONException e) {
                    e.printStackTrace();
                }

            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Log.d("CatMenu", String.valueOf(error));
            }
        });
        AppController.getInstance().addToRequestQueue(catreq);
    }

Answer 1

// JSON =＆gt; [{＆＃34; key＆＃34;：＆＃34; TAB1＆＃34;，＆＃34; list＆＃34;：[your list]}，{＆＃34; key＆＃34;：＆＃34; TAB2＆＃34;，＆＃34;列表＆＃34;：[您的列表]}，{＆＃34;键＆＃34;：＆＃34; TAB3＆＃34;，＆＃34;列表＆＃34;：[您的列表]}]

使用JSON，您可以动态添加标签，如...

tabLayout = (TabLayout) findViewById(R.id.tabs);
// get your json list
JSONArray jsonArray = your_json_array; 
for(int i = 0; i < yourJsonArray.length(); i++){
    JSONObject json = yourJsonArray.get(i);
    tabLayout.addTab(tabLayout.newTab().setText(json.getString("key")));
}

现在使用ViewPager，您可以在标签位置上将列表显示为Fragment。

此链接有助于设置TabLayout android-material-design-working-with-tabs

您还可以使用google Gson库来解析JSON对象。

Answer 2

你的片段

public class OneFragment extends Fragment{

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

    public static Fragment getInstance(int position){
        OneFragment fragment = new OneFragment();
        Bundle bundle = new Bundle();
        bundle.putInt("position", position)
        fragment.setArgument(bundle);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment_one, container, false);
        int position = getArguments().getInt("position", 0);

        // set your list base on position
        if(position == 0){
           //list 1
        } else if(position == 1) {
           // list 2
        } else {
           // list 3
        }
        return view; 
    }

}

您的ViewPagerAdapter

class ViewPagerAdapter extends FragmentPagerAdapter {
    private JSONArray jsonArray;
    public ViewPagerAdapter(FragmentManager manager, JSONArray jsonArray) {
        super(manager);
        this.jsonArray= jsonArray;
    }


    @Override
    public Fragment getItem(int position) {
        return OneFragment.getInstance(position);
    }

    @Override
    public int getCount() {
        return jsonArray.length();
    }

    @Override
    public CharSequence getPageTitle(int position) {
        return jsonArray.getJSONObject(position).getString("key");
    }
}

Tablayout设置

    tabLayout = (TabLayout) findViewById(R.id.tabs);

    // get your json list
    JSONArray jsonArray = your_json_array; 
    for(int i = 0; i < yourJsonArray.length(); i++){
        JSONObject json = yourJsonArray.get(i);
        tabLayout.addTab(tabLayout.newTab().setText(json.getString("key")));
    }

    viewPager = (ViewPager) findViewById(R.id.viewpager);
    ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager(), yourJsonArray);
    viewPager.setAdapter(adapter);

    tabLayout.setupWithViewPager(viewPager);

使用JSON开发标签

2 个答案: