Android将对象列表从活动传递到选项卡fragmets

我这里有个问题 我使用tablayout viewpager从数据库中获取对象，并通过捆绑将它们传递到tabs片段 问题是绑定在选项卡片段中变为null

这里是活动

import android.app.ProgressDialog;
import android.content.Context;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.widget.Toolbar;
import java.util.ArrayList;
import java.util.List;


public class Categorys extends DrawerActivity implements TabLayout.OnTabSelectedListener {

    String url,result;

    //This is our tablayout
    private TabLayout tabLayout;
    //This is our viewPager
    private ViewPager viewPager;
    ProgressDialog progress;
    DBhelper db;
    Bundle bundle;

    Context context;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_categorys);
        //Adding toolbar to the activity
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        //       getSupportActionBar().setDisplayShowHomeEnabled(true);
        set();

        db = new DBhelper(Categorys.this);
        db.open();
        List<ProductObj> productslistfromDB = db.getAllProductsUp();
        db.close();

    ProductObj product = productslistfromDB.get(0);
    String namee = product.getName();
    String details = product.getDetails();
    String category = product.getcategory();
    String ownerr = product.getOwner();
    String weight = product.getWeight();
    String size = product.getSize();
    String price = product.getPrice();
    String imageurl = product.getimageurl();
    String owner_address = product.getOwner_address();
    String owner_phone = product.getOwner_phone();
    String UID = product.getUID();

    productpojo productpoj = new productpojo();
    productpoj.setName(namee);
    productpoj.setDetails(details);
    productpoj.setcategory(category);
    productpoj.setOwner(ownerr);
    productpoj.setWeight(weight);
    productpoj.setSize(size);
    productpoj.setPrice(price);
    productpoj.setimageurl(imageurl);
    productpoj.setOwner_address(owner_address);
    productpoj.setOwner_phone(owner_phone);
    productpoj.setUID(UID);

    ArrayList<productpojo> productlisttosend = new ArrayList<>();
    productlisttosend.add(productpoj);

    Tab1 fragmentGet1 = new Tab1();
    Tab2 fragmentGet2 = new Tab2();
    bundle = new Bundle();
    bundle.putParcelableArrayList("arraylist", productlisttosend);
    fragmentGet1.setArguments(bundle);
    fragmentGet2.setArguments(bundle);

    //Initializing the tablayout
    tabLayout = (TabLayout) findViewById(R.id.tabLayout);

    //Adding the tabs using addTab() method
    tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_clothes));
    tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_electrical));
    tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_hammer));
    tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_cars));
    tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_interior_accesories));
    tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_buid));
    tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);

    //Initializing viewPager
    viewPager = (ViewPager) findViewById(R.id.pager);

    //Creating our pager adapter
    Pager adapter = new Pager(getSupportFragmentManager(), tabLayout.getTabCount());

    //Adding adapter to pager
    viewPager.setAdapter(adapter);
    viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));

    //Adding onTabSelectedListener to swipe views
    tabLayout.setOnTabSelectedListener(this);

    }




@Override
public void onTabSelected(TabLayout.Tab tab)
{
    viewPager.setCurrentItem(tab.getPosition());
}

@Override
public void onTabUnselected(TabLayout.Tab tab) {

}

@Override
public void onTabReselected(TabLayout.Tab tab) {

}
@Override
public void onBackPressed() {
}
}

---

需要在

onCreateView

中调用

getArguments（）

，以获取使用

setArguments

发送的捆绑包：

bundle=this.getArguments();

---

需要在

onCreateView

中调用

getArguments（）

，以获取使用

setArguments

发送的捆绑包：

bundle=this.getArguments();

---

您的产品POJO是可打包的吗？fragmentGet2和fragmentGet1根本不与寻呼机交互。您创建了两个片段，然后向其中添加了一个捆绑包，您不能以任何其他方式使用它们。@Olayinka yes productpojo是可打包的。。我不明白你说的关于fragmentGet2和fragmentGet1I的意思是你的寻呼机适配器根本没有与片段交互。请看，除非您在问题中没有添加寻呼机类中的某些逻辑，否则我有类寻呼机扩展FragmentStatePagerAdapter，但我没有添加它@olayinkai您的产品是可打包的吗？fragmentGet2和fragmentGet1根本不与寻呼机交互。您创建了两个片段，然后向其中添加了一个捆绑包，您不能以任何其他方式使用它们。@Olayinka yes productpojo是可打包的。。我不明白你说的关于fragmentGet2和fragmentGet1I的意思是你的寻呼机适配器根本没有与片段交互。看，除非你在问题中没有添加寻呼机类中的某些逻辑，否则我有类寻呼机扩展FragmentStatePagerAdapter，但我没有添加它@Olayinkai照你说的做了。。我还是按你说的做了。。仍在获取null

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

/**
 * Created by toshiba c660-12T on 16/08/2016.
 */

//Extending FragmentStatePagerAdapter
public class Pager extends FragmentStatePagerAdapter {

    //integer to count number of tabs
    int tabCount;

    //Constructor to the class
    public Pager(FragmentManager fm, int tabCount) {
        super(fm);
        //Initializing tab count
        this.tabCount= tabCount;
    }

    //Overriding method getItem
    @Override
    public Fragment getItem(int position) {
        //Returning the current tabs
        switch (position) {
            case 0:
                Tab1 tab1 = new Tab1();
                return tab1;
            case 1:
                Tab2 tab2 = new Tab2();
                return tab2;
            default:
                return null;
        }
    }

    //Overriden method getCount to get the number of tabs
    @Override
    public int getCount() {
        return tabCount;
    }
}

bundle=this.getArguments();