在RecyclerView中替換ViewPager中的碎片點擊

Question

我有一個名爲navigation的活動和兩個名爲OneFragment，Description Fragment的碎片。

導航活動包含這兩個片段如下代碼顯示：

navigation.java

public class navigation extends AppCompatActivity 
    implements NavigationView.OnNavigationItemSelectedListener { 
private TabLayout tabLayout; 
private ViewPager viewPager; 
private int[] tabIcons = { 
     R.drawable.ic_newsfeed, 
     R.drawable.ic_livestream, 
     R.drawable.ic_matches, 
     R.drawable.ic_sort 
}; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_navigation); 
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
    setSupportActionBar(toolbar); 



    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
    ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
      this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close); 
    drawer.setDrawerListener(toggle); 
    toggle.syncState(); 

    NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view); 
    navigationView.setNavigationItemSelectedListener(this); 
    viewPager = (ViewPager) findViewById(R.id.viewpager); 
    setupViewPager(viewPager); 

    tabLayout = (TabLayout) findViewById(R.id.tabs); 
    tabLayout.setupWithViewPager(viewPager); 
    setupTabIcons(); 
} 

private void setupTabIcons() { 
    tabLayout.getTabAt(0).setIcon(tabIcons[0]); 
    tabLayout.getTabAt(1).setIcon(tabIcons[1]); 
    tabLayout.getTabAt(2).setIcon(tabIcons[2]); 
    tabLayout.getTabAt(3).setIcon(tabIcons[3]); 

} 

private void setupViewPager(ViewPager viewPager) { 
    ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager()); 
    adapter.addFrag(new OneFragment(),getString(R.string.newsfeed)); 
    adapter.addFrag(new TwoFragment(), getString(R.string.livestream)); 
    adapter.addFrag(new ThreeFragment(),getString(R.string.matches)); 
    adapter.addFrag(new FourFragment(),getString(R.string.schedule)); 
    viewPager.setAdapter(adapter); 
} 
class ViewPagerAdapter extends FragmentPagerAdapter { 
    private final List<Fragment> mFragmentList = new ArrayList<>(); 
    private final List<String> mFragmentTitleList = new ArrayList<>(); 

    public ViewPagerAdapter(FragmentManager manager) { 
     super(manager); 
    } 

    @Override 
    public Fragment getItem(int position) { 
     return mFragmentList.get(position); 
    } 

    @Override 
    public int getCount() { 
     return mFragmentList.size(); 
    } 

    public void addFrag(Fragment fragment, String title) { 
     mFragmentList.add(fragment); 
     mFragmentTitleList.add(title); 
    } 

    @Override 
    public CharSequence getPageTitle(int position) { 
     return mFragmentTitleList.get(position); 
    } 
} 



@Override 
public void onBackPressed() { 
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
    if (drawer.isDrawerOpen(GravityCompat.START)) { 
     drawer.closeDrawer(GravityCompat.START); 
    } else { 
     super.onBackPressed(); 
    } 
} 



@SuppressWarnings("StatementWithEmptyBody") 
@Override 
public boolean onNavigationItemSelected(MenuItem item) { 
    // Handle navigation view item clicks here. 
    int id = item.getItemId(); 

    if (id == R.id.share) { 
     // Handle the camera action 
    } else if (id == R.id.check) { 

    } else if (id == R.id.rateus) { 

    } else if (id == R.id.aboutus) { 

    } 

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
    drawer.closeDrawer(GravityCompat.START); 
    return true; 
} 

這是我的適配器類：

public class PostAdapter2 extends RecyclerView.Adapter<PostAdapter2.ViewHolder>{ 

public Context mContext; 
public ArrayList<News_data> original_items = new ArrayList<>(); 
public ArrayList<News_data> filtered_items = new ArrayList<>(); 
// ItemFilter mFilters = new ItemFilter(); 

public PostAdapter2(Context mContext, ArrayList<News_data> postList) { 
    this.mContext = mContext; 
    this.original_items = postList; 
    this.filtered_items = postList; 

} 

@Override 
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 

    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recycler_news, parent, false); 


    return new ViewHolder(view); 

} 

@Override 
public void onBindViewHolder(ViewHolder holder, int position) { 

    try { 

     final News_data post = filtered_items.get(position); 

     holder.txt_news_title.setText(post.getName_news()); 
     holder.setItemClickListener(new ItemClickListener() { 
      @Override 
      public void onItemClick() { 

       //what to do to replace the OneFragment with the DescriptionFragment 

      } 
     }); 

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



@Override 
public int getItemCount() { 
    return filtered_items.size(); 
} 





public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener { 

    Context c; 
    ItemClickListener itemClickListener; 
    TextView txt_news_title,txt_desc; 
    ImageView image_news; 

    public ViewHolder(View itemView) { 
     super(itemView); 
     txt_news_title = (TextView) itemView.findViewById(R.id.txt_news_title); 
     itemView.setOnClickListener(this); 









    } 


    @Override 
    public void onClick(View v) { 
     this.itemClickListener.onItemClick(); 

    } 
    public void setItemClickListener(ItemClickListener itemClickListener) 
    { 
     this.itemClickListener=itemClickListener; 
    } 
} 

我想要什麼要做的是取代OneFragment與說明片段上的Recyclerview項目點擊。

Answer 1

遺憾的是沒人能取代Fragment的內線ViewPager，但你可以使用NestedFragment到ChildFragment添加到您的主Fragment像你Activity做。 只需在您內部定義FrameLayoutOneFragmentLayout並呼叫getChildFragmentManager而不是getSupportFragmentManager。例如：

Fragment descriptionFragment = new DescriptionFragment(); 
FragmentTransaction transaction = getChildFragmentManager().beginTransaction(); 
transaction.add(R.id.nested_fragment_container, descriptionFragment).commit(); 

欲瞭解更多信息，你可以點擊這裏查看：

https://developer.android.com/about/versions/android-4.2.html#NestedFragments

PS：如果你有比這多個片段，或者您希望您的片段是獨立你可以使用這個庫得到instagram like tabs：

https://github.com/ncapdevi/FragNav