Wie werden JSON-Daten in Fragmente zerlegt?

Question

Hallo Freunde im Entwickeln von Android-App mit Fragmenten in einem Viewpager, aber jetzt möchte ich JSON-Daten in das fragment.my parse.my Frage ist, wie kann ich Anzahl der Fragmente als die Größe der JSON-Daten festlegen und die JSON-Daten in das erforderliche Fragment einfügen Bitte helfen Sie mir, es im Internet seit Stunden zu suchen, aber enttäuschende Ergebnisse, also bitte helfen Sie mir. Danke im Voraus! mit C_Id = 14 im zweiten Fragment

[{"c_id":13,"category_name":"PUBLICATIONS","imagename":"http://goringr.com/church_project/churchimagesnew/publications.jpg","ctype":"church"},{"c_id":14,"category_name":"YOUTH ASSOCIATION","imagename":"http://goringr.com/church_project/churchimagesnew/youthassociation.jpg","ctype":"church"}] 

dies ist mein json Daten und alle i ist möchte mit C_Id = 13 in erste Fragment und Anzeigeinhalte des Objektinhalte des Objekts anzuzeigen.

MainActivity.java

package project1.test; 

import android.content.Intent; 
import android.support.design.widget.CollapsingToolbarLayout; 
import android.support.v4.app.Fragment; 
import android.support.v4.app.FragmentManager; 
import android.support.v4.app.FragmentPagerAdapter; 
import android.support.v4.view.ViewPager; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.support.v7.widget.Toolbar; 
import android.view.Menu; 
import android.view.View; 
import android.widget.Button; 

public class MainActivity extends AppCompatActivity { 
public static final String data = "hello"; 
FragmentPagerAdapter adapterViewPager; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 

    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    //  Toolbar tool = (Toolbar)findViewById(R.id.tool); 
    //  setSupportActionBar(tool); 
    //  getSupportActionBar().setDisplayHomeAsUpEnabled(true); 
    ViewPager vpPager = (ViewPager) findViewById(R.id.vpPager); 
    adapterViewPager = new MyPagerAdapter(getSupportFragmentManager()); 
    vpPager.setAdapter(adapterViewPager); 

} 

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    getMenuInflater().inflate(R.menu.sample_actions, menu); 
    return true; 
} 

public static class MyPagerAdapter extends FragmentPagerAdapter { 
    private static int NUM_ITEMS = 3; 

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

    // Returns total number of pages 
    @Override 
    public int getCount() { 
     return NUM_ITEMS; 
    } 

    // Returns the fragment to display for that page 
    @Override 
    public Fragment getItem(int position) { 
     switch (position) { 
      case 0: 
       return FirstFragment.newInstance(0, "Fragment1"); 
      case 1: 
       return FirstFragment.newInstance(1, "Fragment2"); 
      case 2: 
       return SecondFragment.newInstance(2, "Fragment3"); 
      default: 
       return null; 
     } 
    } 

    // Returns the page title for the top indicator 
    @Override 
    public CharSequence getPageTitle(int position) { 
     return "Page " + position; 
    } 

} 

} 

FirstFragment

public class FirstFragment extends Fragment { 
// Store instance variables 
private String title; 
private int page; 

// newInstance constructor for creating fragment with arguments 
public static FirstFragment newInstance(int page, String title) { 
    FirstFragment fragmentFirst = new FirstFragment(); 
    Bundle args = new Bundle(); 
    args.putInt("someInt", page); 
    args.putString("someTitle", title); 
    fragmentFirst.setArguments(args); 
    return fragmentFirst; 
} 

// Store instance variables based on arguments passed 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    setHasOptionsMenu(true); 
    page = getArguments().getInt("someInt", 0); 
    title = getArguments().getString("someTitle"); 
} 

// Inflate the view for the fragment based on layout XML 
@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 

; 
    View view = inflater.inflate(R.layout.fragment_first, container, false); 
//  TextView tvLabel = (TextView) view.findViewById(R.id.tvLabel); 
////  tvLabel.setText(page + " -- " + title); 


    CollapsingToolbarLayout collapsingToolbarLayout = (CollapsingToolbarLayout)view.findViewById(R.id.collapsing_toolbar1); 
    collapsingToolbarLayout.setTitle("black panther"); 

    return view; 
} 

@Override 
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { 
    // TODO Add your menu entries here 
    super.onCreateOptionsMenu(menu, inflater); 
    inflater.inflate(R.menu.sample_actions, menu); 
} 
} 

SecondFragment

public class SecondFragment extends Fragment { 
// Store instance variables 
private String title; 
private int page; 
Button tryit; 

// newInstance constructor for creating fragment with arguments 
public static SecondFragment newInstance(int page, String title) { 
    SecondFragment fragmentSecond = new SecondFragment(); 
    Bundle args = new Bundle(); 
    args.putInt("someInt", page); 
    args.putString("someTitle", title); 
    fragmentSecond.setArguments(args); 
    return fragmentSecond; 
} 

// Store instance variables based on arguments passed 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    page = getArguments().getInt("someInt", 0); 
    title = getArguments().getString("someTitle"); 
} 

// Inflate the view for the fragment based on layout XML 
@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 

    View view = inflater.inflate(R.layout.fragment_second, container, 
    false); 
    tryit = (Button) view.findViewById(R.id.tryit); 
    tryit.setOnClickListener(new Button.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      Intent intent = new Intent(getActivity(),ManagingProfile.class); 
      startActivity(intent); 
     } 
    }); 
//  TextView tvLabel = (TextView) view.findViewById(R.id.tvLabel); 
//  tvLabel.setText(page + " -- " + title); 
    return view; 
} 
} 

Answer 1

können Sie pars e wie folgt aus:

List<RidesData> ridesDatas; /* this is should be parcelable */ 
private void setupViewPager(ViewPager viewPager) { 
    ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager()); 
    adapter.addFragment(FragmentAbout.newInstance(ridesDatas), "ABOUT"); 
    adapter.addFragment(FragmentPointOfInterest.newInstance(ridesDatas),"POI"); 

    viewPager.setAdapter(adapter); 
     } 

und setzen constructure so zu jedem Fragment:

FragmentAbout.class

public static FragmentAbout newInstance(List<RidesData> ridesDatas) { 
     FragmentAbout fragmentAbout = new FragmentAbout(); 
     Bundle arg = new Bundle(); 
     arg.putParcelableArrayList("data", (ArrayList<? extends Parcelable>) ridesDatas); 
     fragmentAbout.setArguments(arg); 
     return fragmentAbout; 
    } 

FragmentPointOfInterest.class

public static FragmentPointOfInterest newInstance(List<RidesData> ridesDatas) { 
     FragmentPointOfInterest fragmentPointOfInterest = new FragmentPointOfInterest(); 
     Bundle arg = new Bundle(); 
     arg.putParcelableArrayList("data", (ArrayList<? extends Parcelable>) ridesDatas); 
     fragmentPointOfInterest.setArguments(arg); 
     return fragmentPointOfInterest; 
    } 

und jeweils Daten von json erhalten in onViewCreated() Methode des Fragments wie folgt:

Sie haben 2 Position von Daten in JSON.

[0] = c_id=13 
[1] = c_id=14 

so in erstem Fragmente 0 gesetzt Position:

RidesData data = ridesData.get(0); 

und in zweiten Fragmente Satz 1 postion:

RidesData data = ridesData.get (1);

@Override 
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) { 
     super.onViewCreated(view, savedInstanceState); 
     ridesData = new ArrayList<>(); 
     ridesData = getArguments().getParcelableArrayList("data"); 
     RidesData data = ridesData.get(1);  
    } 

Answer 2

Sie müssen den benutzerdefinierten Adapter verwenden, um die JSON-Daten zu extrahieren und Halter anzuzeigen, um die Daten zu drucken. beziehen Sie sich auf diese link