如何解决不抽象和不重写抽象方法onTabReselected

Question

我正在尝试在我的应用中创建 navigation drawer。在我的 navigation drawer item、View 之一中，我希望它具有 2 tabs 和 swipe view 功能。我收到错误 Viewview is not abstract and does not override abstract method onTabReselected。

MainActivity // 导航抽屉项目

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;

private void selectItem(int position) {

        Fragment fragment = null;

        switch (position) {
            case 0:
                fragment=new Information();
                break;
            case 1:

                fragment=new Claims1();
                Bundle bundle=new Bundle();
                bundle.putLong("ab",WorkDetailsTable.ab);
                fragment.setArguments(bundle);
                break;

            case 2:
                fragment=new ViewView();
                break;

            default:
                break;
        }

        if (fragment != null) {
            FragmentManager fragmentManager = getFragmentManager();
            fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit(); 

            mDrawerList.setItemChecked(position, true);
            mDrawerList.setSelection(position);
            setTitle(mNavigationDrawerItemTitles[position]);
            mDrawerLayout.closeDrawer(mDrawerList);

        } else {
            Log.e("MainActivity", "Error in creating fragment");
        }
    }
}

ViewView

import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.ViewPager;
import android.support.v7.app.ActionBar;
import android.view.LayoutInflater;
import android.view.ViewGroup;
import android.widget.AdapterView;

public class ViewView extends Fragment implements ActionBar.TabListener {

    private ViewPager viewPager;
    private TabsFragmentPagerAdapter mAdapter;
    private ActionBar actionBar;
    private String[] tabs = {"Information", "receipt"};


    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        View View1 = inflater.inflate(R.layout.viewview1, container, false);
        viewPager = (ViewPager) View1.findViewById(R.id.pager);
        mAdapter = new TabsFragmentPagerAdapter(getActivity().getSupportFragmentManager());
        viewPager.setAdapter(mAdapter);
        actionBar = getActivity().getActionBar();
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
        for (int i = 0; i < 2; i++) {
            actionBar.addTab(actionBar.newTab().setText(tabs[i]).setTabListener(this));
        }
        viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {

            @Override
            public void onPageSelected(int arg) {
                // TODO Auto-generated method stub
                actionBar.setSelectedNavigationItem(arg);
            }

            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onPageScrollStateChanged(int arg0) {
                // TODO Auto-generated method stub

            }


        });


        BuildList();
        return View1;
    }

    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getActivity().getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    public void onTabReselected(ActionBar.Tab arg0, FragmentTransaction arg1) {
        // TODO Auto-generated method stub

    }


    public void onTabSelected(ActionBar.Tab tab, FragmentTransaction arg1) {
        // TODO Auto-generated method stub
        viewPager.setCurrentItem(tab.getPosition());
    }


    public void onTabUnselected(ActionBar.Tab arg0, FragmentTransaction arg1) {
        // TODO Auto-generated method stub
    }
}

TabsFragmentPagerAdapter

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;

public class TabsFragmentPagerAdapter extends FragmentPagerAdapter {

    public TabsFragmentPagerAdapter(FragmentManager fm) {
        super(fm);
        // TODO Auto-generated constructor stub
    }

    @Override
    public Fragment getItem(int index) {
        // TODO Auto-generated method stub

        switch(index) {
            case 0:
                return new UpdatePage2();
            case 1:
                return new Receipt();

        }
        return null;
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return 2;
    }

}

错误

Error:(50, 47) error: incompatible types: android.app.ActionBar cannot be converted to android.support.v7.app.ActionBar

Answer 1

嗯，错误信息很清楚。您的 ViewView class 实现了 TabListener 但不包含 onTabReselected 的实现。您在实现 ViewPager.OnPageChangeListener() 的匿名 class 实例中实现了 onTabReselected，您在 onCreateView 方法中定义了它。

问题是您需要 ViewView 来实施 TabListener。如果这样做，请将 TabListener 所需的方法直接添加到 ViewView。如果不是，请删除 implements ActionBar.TabListener 子句。

如何解决不抽象和不重写抽象方法onTabReselected

How to solve not abstract and does not override abstract method onTabReselected

java

tabs

android

swipeview