如何通过从recyclerView的片段

Question

选择一个项目，我使用了Android工作室

抽屉式导航栏模板我用一个活动只有...片段替换过一个活动

要执行的操作

public class MainActivity extends AppCompatActivity 
     implements NavigationView.OnNavigationItemSelectedListener { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
     setSupportActionBar(toolbar); 

     FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab); 
     fab.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG) 
         .setAction("Action", null).show(); 
      } 
     }); 

     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.addDrawerListener(toggle); 
     toggle.syncState(); 

     NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view); 
     navigationView.setNavigationItemSelectedListener(this); 

     // here I call the fragment 

     FragmentManager fm=getFragmentManager(); 
     fm.beginTransaction().replace(R.id.content_main_frame, new homeFragment()).commit(); 
    } 

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

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

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 

     //noinspection SimplifiableIfStatement 
     if (id == R.id.action_settings) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 

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

     if (id == R.id.nav_camera) { 
      // Handle the camera action 
     } else if (id == R.id.nav_gallery) { 

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

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

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

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

     } 

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

---

public class homeFragment extends Fragment{ 

    RecyclerView recyclerView; 
    String[] fields={"ALV","NIJU","AJITH","ASWIN"}; 

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

     View rootView = inflater.inflate(R.layout.fragment_home, container, false); 

     //for getting recyclerview id 

     recyclerView= (RecyclerView) rootView.findViewById(R.id.recyclerView_home); 

     // for specifying layout manager 

     LinearLayoutManager manager=new LinearLayoutManager(getActivity()); 
     recyclerView.setLayoutManager(manager); 

     homeListAdapter adapter = new homeListAdapter(this.getActivity(), fields); 
     recyclerView.setAdapter(adapter); 

     recyclerView.setHasFixedSize(true); 

     return rootView; 
    } 
} 

---

public class homeListAdapter extends RecyclerView.Adapter<homeListAdapter.homeViewHolder> { 

    private Context context; 
    private String[] field; 

    public homeListAdapter(Context context, String[] field){ 
     this.context=context; 
     this.field=field; 


    } 

    @Override 
    public homeViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     LayoutInflater inflater=LayoutInflater.from(parent.getContext()); 
     View view = inflater.from(parent.getContext()).inflate(R.layout.item_home,parent,false); 

     homeViewHolder viewHolder= new homeViewHolder(view); 
     return viewHolder; 
    } 

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

     holder.card_home_title.setText(field[position]); 

    } 

    @Override 
    public int getItemCount() { 

     return field.length; 
    } 

    // View holder 

    public static class homeViewHolder extends RecyclerView.ViewHolder{ 

     public CardView card_view; 
     public TextView card_home_title; 

     public homeViewHolder(View itemView) { 
      super(itemView); 
      card_view = (CardView) itemView.findViewById(R.id.card_view); 
      card_home_title = (TextView) itemView.findViewById(R.id.card_text); 
     } 
    } 

} 

---

public class ItemHome implements Serializable { 

    public int id; 

    public String title; 
} 

当我按下ALV我想这alvfragment更换，当我按下Niju我想显示此Nijufragment。

截图：

Answer 1

如果我理解正确的话，你想从抽屉式导航栏中更换片段，你需要去MainActivty这是如何做到这一点的例子：

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

    if (id == R.id.nav_camera) { 
     // Handle the camera action 
//use here the desired nav 
     } else if (id == R.id.nav_ALV) { 
     FragmentManager fm=getFragmentManager(); 
     fm.beginTransaction().replace(R.id.content_main_frame, new ALVFragment).commit();