6

我陷入了与内部片段 insideNavigation-drawer-page-sliding-tab-strip viewpager 选项卡一起使用的列表视图的问题,该问题在This git hub example中给出。

我正在使用相同的示例,所有 4 个选项卡都有一个列表视图,其中设置了不同的 arraylist 适配器。

我只使用一个片段和标签位置的基础我正在将不同的列表数据加载到内部片段 arrayAdapter。我还有两个按钮,一个是删除,另一个是添加。

我想要什么:如果我按下添加按钮,那么它应该将新数据添加到数组列表(基于选项卡位置将新添加添加到相应的数组列表)并刷新列表视图数据。

在我的代码中,它刷新当前查看选项卡,但在下一个选项卡列表视图中也刷新并获取上一个选项卡的数据。请帮助我,任何帮助将不胜感激。

我有一个单独的类文件。如果我的方法是错误的,请让我知道正确的方法。

公共类 PageSlidingTabStripFragment 扩展片段 {

public static final String TAG = PageSlidingTabStripFragment.class
        .getSimpleName();

private MyListAdapter myAdapter;

private boolean isDeleteBtnClicked = false;
private int tabType = 0;
private ListView myListView;

public static PageSlidingTabStripFragment newInstance() {
    return new PageSlidingTabStripFragment();
}

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

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

@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);

    PagerSlidingTabStrip tabs = (PagerSlidingTabStrip) view
            .findViewById(R.id.tabs);
    ViewPager pager = (ViewPager) view.findViewById(R.id.pager);
    MyPagerAdapter adapter = new MyPagerAdapter(getChildFragmentManager());
    pager.setAdapter(adapter);
    tabs.setViewPager(pager);

}

public class MyPagerAdapter extends FragmentPagerAdapter {

    public MyPagerAdapter(FragmentManager fm) {
        super(fm);
    }

    private final String[] TITLES = { "Categories", "Home", "Top Paid",
    "Top Free" };

    @Override
    public CharSequence getPageTitle(int position) {
        return TITLES[position];
    }

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

    @Override
    public SherlockFragment getItem(int position) {

        return new SuperAwesomeCardFragment().newInstance(position); // here I am calling the fragment by sending the position
    }

}
private ArrayList<String> categoriesList = new ArrayList<String>(); 
private ArrayList<String> homeList = new ArrayList<String>();
private ArrayList<String> topPaidList = new ArrayList<String>();
private ArrayList<String> topFreeList = new ArrayList<String>();

@SuppressLint("ValidFragment")
public class SuperAwesomeCardFragment extends SherlockFragment{

    private final String ARG_POSITION = "position";

    private int position;

    private Button deleteBtn;
    private Button addBtn;

    public SuperAwesomeCardFragment newInstance(int position) {
        SuperAwesomeCardFragment f = new SuperAwesomeCardFragment();
        Bundle b = new Bundle();
        b.putInt(ARG_POSITION, position);
        f.setArguments(b);
        return f;
    }

    public SuperAwesomeCardFragment(){

    }

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

        categoriesList.clear();
        // adding element to Categories arraylist
        categoriesList.add("categories -1");
        categoriesList.add("categories -2");
        categoriesList.add("categories -3");
        categoriesList.add("categories -4");

        homeList.clear();
        // adding element to Home arraylist
        homeList.add("home -1");
        homeList.add("home -2");
        homeList.add("home -3");
        homeList.add("home -4");

        topPaidList.clear();
        // adding element to TopPaid arraylist
        topPaidList.add("topPaid -1");
        topPaidList.add("topPaid -2");
        topPaidList.add("topPaid -3");  
        topPaidList.add("topPaid -4");

        topFreeList.clear();
        // adding element to TopFree arraylist
        topFreeList.add("topFree -1");
        topFreeList.add("topFree -2");
        topFreeList.add("topFree -3");
        topFreeList.add("topFree -4"); 

        position = getArguments().getInt(ARG_POSITION); // here I get the position of tab/view pager
    }

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

        View root = inflater.inflate(R.layout.main_pager_body, container, false);

        myListView = (ListView) root.findViewById(R.id.my_list_view);
        deleteBtn = (Button) root.findViewById(R.id.delete_btn);
        addBtn = (Button) root.findViewById(R.id.add_btn);

        switch (position) {
        // Categories position
        case 0:
            setListView(categoriesList);
            break;
            // Home position
        case 1:
            setListView(homeList);
            break;
            // TopPaid position
        case 2:
            setListView(topPaidList);
            break;
            // TopFree position
        case 3:
            setListView(topFreeList);
            break; 
        } // here I am setting the list view based on the tab/view pager position.

        deleteBtn.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                Toast.makeText(getActivity(), "deleteBtn Button clicked", Toast.LENGTH_SHORT).show();

            }
        });

        addBtn.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                Toast.makeText(getActivity(), " addBtn Button clicked", Toast.LENGTH_SHORT).show();

                switch (position) {
                // Categories position
                case 0:
                    categoriesList.add("categories -5");
                    setListView(categoriesList);
                    break;
                    // Home position
                case 1:
                    homeList.add("home -5");
                    setListView(homeList);
                    break;
                    // TopPaid position
                case 2:
                    topPaidList.add("topPaid -5");
                    setListView(topPaidList);
                    break;
                    // TopFree position
                case 3:
                    topFreeList.add("topFree -5");
                    setListView(topFreeList);
                    break;
                }

            }
        });

        return root;
    }

    public void setListView(ArrayList<String> myList){
        myAdapter = new MyListAdapter(getActivity().getApplicationContext(), R.layout.list_row, myList);
        myListView.setAdapter(myAdapter);
        myListView.setItemsCanFocus(true);
        myAdapter.notifyDataSetChanged();
    }
}

public class MyListAdapter extends ArrayAdapter<String>
{
    ArrayList<String> myList;
    public MyListAdapter(Context context, int textViewResourceId,
            ArrayList<String> myList) {
        super(context, textViewResourceId, myList);

        this.myList = myList;
    }

    public class ViewHolder {
        private TextView listElementTV;
        private RelativeLayout buttonContains;
        private Button deleteItemBtn;
    }

    public View getView(int position, View convertView, ViewGroup parent) {

        View v = convertView;
        ViewHolder holder = null;
        if (v == null) {
            LayoutInflater vi = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            // get the view for assign data to list view
            v = vi.inflate(R.layout.list_row, null);

            TextView listElementTV = (TextView) v.findViewById(R.id.list_element);

            RelativeLayout buttonContains = (RelativeLayout) v.findViewById(R.id.button_contains);
            Button deleteItemBtn = (Button) v.findViewById(R.id.delete_item);

            holder = new ViewHolder();

            holder.listElementTV = listElementTV;
            holder.buttonContains = buttonContains;
            holder.deleteItemBtn = deleteItemBtn;

            v.setTag(holder);
        } else
            holder = (ViewHolder) v.getTag();

        // get list of hospitalityInfo using position
        String listElement = this.myList.get(position); 

        if(listElement != null){
            holder.listElementTV.setText(listElement);
        }

        return v;
    }

}

}

4

1 回答 1

4

安卓学习者

回答为时已晚,但可能对其他人有所帮助

用户下面的链接来解决这种实现。

在 Fragment 切换期间替代 onResume()

于 2014-12-29T09:48:23.367 回答