Question

我是android的新手。我正在尝试使用内置viewpager的2个标签实现listview。当scroll.Listview包含一个spinner和三个textview将使用适配器生成时，会出现此问题。如果我从生成的第一个微调器中选择项目，那么我得到它的值。但是当我向下选择不同的微调器时，我先前选择的微调器被选择到位置0。

这是代码

public class Baggage_Home extends AppCompatActivity{

TabLayout tabs;
private ViewPager viewPager;
public static TextView extra_total;


 private int[] tabIcons = {
        R.drawable.ic_business_center_black_24dp,
        R.drawable.ic_room_service_black_24dp,

};

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.baggage_meal);

    extra_total=(TextView)findViewById(R.id.extra_total);
    viewPager = (ViewPager) findViewById(R.id.viewpager);
    viewPager.setOffscreenPageLimit(2);
    setupViewPager(viewPager);

 extra_total.setText("₹ "+String.valueOf(InternationalRoundTrip.total));
    tabs = (TabLayout) findViewById(R.id.tabs);
    tabs.setupWithViewPager(viewPager);
    setupTabIcons();

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    toolbar.setTitle("Extra Services");
    setSupportActionBar(toolbar);



}


private void setupTabIcons() {
    tabs.getTabAt(0).setIcon(tabIcons[0]);
    tabs.getTabAt(1).setIcon(tabIcons[1]);

}



@Override
public void onBackPressed() {
    if(!Flight_search_new.trm_cty_code_cnt.equals("IN") || !Flight_search_new.to_cty_code_cnt.equals("IN")) {
                if(Flight_search_new.valtype=="Internationaloneway"){
                    Intent intent = new Intent(Baggage_Home.this,FlightBookingPage_Int.class);
                    startActivity(intent);
                }else{
                    Intent intent = new Intent(Baggage_Home.this,RoundFlightBookingPage_Int.class);
                    intent.putExtra("BAGGAGE","abcd");
                    startActivity(intent);
                }

            }else
            {
                Intent intent = new Intent(Baggage_Home.this,FlightBookingPage.class);
                startActivity(intent);
            }
}

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 addFragment(Fragment fragment, String title) {
        mFragmentList.add(fragment);
        mFragmentTitleList.add(title);
    }

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


private void setupViewPager(ViewPager viewPager) {
    ViewPagerAdapter adapter = new 
ViewPagerAdapter(getSupportFragmentManager());
    adapter.addFragment(new Baggage_display(), "Baggage");
    adapter.addFragment(new Meal_display(), "Meal");
    viewPager.setAdapter(adapter);
}
}

行政类别的XML

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/layout1"
xmlns:app="http://schemas.android.com/apk/res-auto"
>

<android.support.design.widget.AppBarLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:theme="@style/AppTheme.AppBarOverlay"
    >

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        app:popupTheme="@style/AppTheme.PopupOverlay" />



</android.support.design.widget.AppBarLayout>

<LinearLayout
    android:layout_width="match_parent"

    android:orientation="horizontal"
    android:layout_height="wrap_content"
   >

    <android.support.design.widget.TabLayout
        android:layout_width="match_parent"
        android:id="@+id/tabs"
        android:layout_height="wrap_content"
        app:tabMaxWidth="0dp"
        app:tabGravity="fill"
        app:tabMode="fixed"

        >

        <android.support.design.widget.TabItem
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Baggage"

            />

        <android.support.design.widget.TabItem
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Meal"

            />

    </android.support.design.widget.TabLayout>



</LinearLayout>
<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textSize="25dp"
    android:textColor="@color/btn_color"
    android:id="@+id/extra_total"
    android:layout_gravity="bottom|center"
    />

    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@+id/layout1"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        />
</LinearLayout>

BAGGAGE DISPLAY CLASS

public class Baggage_display extends Fragment {


ArrayList<Baggage_details> bagdetails=new ArrayList<Baggage_details>();
Baggage_Adapter baggageAdapter;
ListView listView;
public static ArrayList<String> title_adult_bag_arr=new ArrayList<String>();
public static ArrayList<String> title_adult_bag_arr_rtn=new ArrayList<String>();
public static ArrayList<String> title_child_bag_arr=new ArrayList<String>();
public static ArrayList<String> title_child_bag_arr_rtn=new ArrayList<String>();


LinearLayout lvs;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

}

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

    View views = inflater.inflate(R.layout.baggage_display, container, false);

    listView=(ListView)views.findViewById(R.id.listView);

    bagdetails.clear();
    title_adult_bag_arr.clear();
    title_adult_bag_arr_rtn.clear();
    title_child_bag_arr.clear();
    title_child_bag_arr_rtn.clear();

    for (int i = 0; i < Integer.parseInt(Flight_search_new.adult); i++)
    {

        if(Flight_search_new.valtype.equals("Internationalround"))
        {
            if(InternationalRoundTrip.api.equals("galileo"))
            {
                if (InternationalRoundTrip.provider.equals("ACH"))
                {
                    bagdetails.add(new Baggage_details("Onward",  Flight_search_new.trm_cty_code +"-"+ Flight_search_new.to_cty_code,"Adult -"+(i+1),RoundFlightBookingPage_Int.ach_adl_baggage));
                    baggageAdapter=new Baggage_Adapter(getContext(),bagdetails);


                    if(RoundFlightBookingPage_Int.ach_adl_baggage_rtn != null) {
                        bagdetails.add(new Baggage_details("Return", Flight_search_new.to_cty_code + "-" + Flight_search_new.trm_cty_code, "Adult -" + (i + 1), RoundFlightBookingPage_Int.ach_adl_baggage_rtn));
                        baggageAdapter = new Baggage_Adapter(getContext(), bagdetails);
                    }
                    System.out.println("WWWWW"+RoundFlightBookingPage_Int.ach_adl_baggage.toString());
                    System.out.println("RRRRR"+RoundFlightBookingPage_Int.ach_adl_baggage_rtn.toString());

                }
                else
                {

                }
            }
            else
            {
                bagdetails.add(new Baggage_details("Onward",  Flight_search_new.trm_cty_code +"-"+ Flight_search_new.to_cty_code,"Adult -"+(i+1),RoundFlightBookingPage_Int.titlebag));
                baggageAdapter=new Baggage_Adapter(getContext(),bagdetails);

                if(RoundFlightBookingPage_Int.titlebag_return != null) {
                    bagdetails.add(new Baggage_details("Return", Flight_search_new.to_cty_code + "-" + Flight_search_new.trm_cty_code, "Adult -" + (i + 1), RoundFlightBookingPage_Int.titlebag_return));
                    baggageAdapter = new Baggage_Adapter(getContext(), bagdetails);
                }
            }

        }
        else{
            Toast.makeText(getContext(), "Not Int Round", Toast.LENGTH_SHORT).show();
        }

    }



    if(Integer.parseInt(Flight_search_new.child) > 0) {
        for (int i = 0; i < Integer.parseInt(Flight_search_new.child); i++) {

            if (InternationalRoundTrip.api.equals("galileo")) {
                if (InternationalRoundTrip.provider.equals("ACH")) {
                    bagdetails.add(new Baggage_details("Onward", Flight_search_new.trm_cty_code + "-" + Flight_search_new.to_cty_code, "Child -" + (i + 1), RoundFlightBookingPage_Int.ach_child_bag));
                    baggageAdapter = new Baggage_Adapter(getContext(), bagdetails);


                    if (RoundFlightBookingPage_Int.ach_adl_baggage_rtn != null) {
                        bagdetails.add(new Baggage_details("Return", Flight_search_new.to_cty_code + "-" + Flight_search_new.trm_cty_code, "Child -" + (i + 1), RoundFlightBookingPage_Int.ach_chi_bag_rtn));
                        baggageAdapter = new Baggage_Adapter(getContext(), bagdetails);
                    }
                    System.out.println("CCCCCC"+RoundFlightBookingPage_Int.ach_child_bag.toString());
                    System.out.println("PPPPP"+RoundFlightBookingPage_Int.ach_chi_bag_rtn.toString());

                } else {

                }
            } else {
                bagdetails.add(new Baggage_details("Onward",  Flight_search_new.trm_cty_code +"-"+ Flight_search_new.to_cty_code,"Child -"+(i+1),RoundFlightBookingPage_Int.titlebag));
                baggageAdapter=new Baggage_Adapter(getContext(),bagdetails);

                if(RoundFlightBookingPage_Int.titlebag_return!= null) {
                    bagdetails.add(new Baggage_details("Return", Flight_search_new.to_cty_code + "-" + Flight_search_new.trm_cty_code, "Child -" + (i + 1), RoundFlightBookingPage_Int.titlebag_return));
                    baggageAdapter = new Baggage_Adapter(getContext(), bagdetails);
                }

            }
        }
    }



    return views;

}


}

用餐显示类

public class Meal_display extends Fragment {

ArrayList<Meal_details> bagdetails=new ArrayList<Meal_details>();
public static ArrayList<String> title_adult_meal_arr=new ArrayList<String>();
public static ArrayList<String> title_adult_meal_arr_rtn=new ArrayList<String>();
public static ArrayList<String> title_child_meal_arr=new ArrayList<String>();
public static ArrayList<String> title_child_meal_arr_rtn=new ArrayList<String>();
Meal_Adapter baggageAdapter;
ListView listView;



LinearLayout lvs;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

}

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

    View views = inflater.inflate(R.layout.meal_display, container, false);

    listView=(ListView)views.findViewById(R.id.listView);
    title_adult_meal_arr.clear();
    title_adult_meal_arr_rtn.clear();
    title_child_meal_arr.clear();
    title_child_meal_arr_rtn.clear();


    for (int i = 0; i < Integer.parseInt(Flight_search_new.adult); i++)
    {

        if(Flight_search_new.valtype.equals("Internationalround"))
        {
            if(InternationalRoundTrip.api.equals("galileo"))
            {
                if (InternationalRoundTrip.provider.equals("ACH"))
                {
                    bagdetails.add(new Meal_details("Onward",  Flight_search_new.trm_cty_code +"-"+ Flight_search_new.to_cty_code,"Adult -"+(i+1),RoundFlightBookingPage_Int.ach_adl_meal_onward));
                    baggageAdapter=new Meal_Adapter(getContext(),bagdetails);


                    if(RoundFlightBookingPage_Int.ach_adl_meal_rtn != null && !RoundFlightBookingPage_Int.ach_adl_meal_rtn.isEmpty())
                    {
                        bagdetails.add(new Meal_details("Return", Flight_search_new.to_cty_code + "-" + Flight_search_new.trm_cty_code, "Adult -" + (i + 1), RoundFlightBookingPage_Int.ach_adl_meal_rtn));
                        baggageAdapter = new Meal_Adapter(getContext(), bagdetails);
                    }

                }
                else
                {

                }
            }
            else
            {
                for (int k = 0; k < Round_ViewFlight.final_sec_meal.size(); k++) {
                    String src_des = Round_ViewFlight.final_sec_meal.get(k);
                    bagdetails.add(new Meal_details("Onward", src_des, "Adult -" + (i + 1), RoundFlightBookingPage_Int.titlemeal));
                    baggageAdapter = new Meal_Adapter(getContext(), bagdetails);
                }

                if(RoundFlightBookingPage_Int.titlemeal_return != null && !RoundFlightBookingPage_Int.titlemeal_return.isEmpty())
                {

                    for (int k = 0; k < Round_ViewFlight.final_sec_meal_return.size(); k++) {
                        String src_des1 = Round_ViewFlight.final_sec_meal_return.get(k);
                        bagdetails.add(new Meal_details("Return", src_des1, "Adult -" + (i + 1), RoundFlightBookingPage_Int.titlemeal_return));
                        baggageAdapter = new Meal_Adapter(getContext(), bagdetails);
                    }
                }


            }
        }
        else{
            Toast.makeText(getContext(), "Not Int Round", Toast.LENGTH_SHORT).show();
        }

    }


    if(Integer.parseInt(Flight_search_new.child) > 0) {
        for (int i = 0; i < Integer.parseInt(Flight_search_new.child); i++) {

            if (InternationalRoundTrip.api.equals("galileo")) {
                if (InternationalRoundTrip.provider.equals("ACH")) {
                    bagdetails.add(new Meal_details("Onward", Flight_search_new.trm_cty_code + "-" + Flight_search_new.to_cty_code, "Child -" + (i + 1), RoundFlightBookingPage_Int.ach_child_meal));
                    baggageAdapter = new Meal_Adapter(getContext(), bagdetails);


                    if (RoundFlightBookingPage_Int.ach_adl_baggage_rtn != null && !RoundFlightBookingPage_Int.ach_adl_baggage_rtn.isEmpty()) {
                        bagdetails.add(new Meal_details("Return", Flight_search_new.to_cty_code + "-" + Flight_search_new.trm_cty_code, "Child -" + (i + 1), RoundFlightBookingPage_Int.ach_child_meal_rtn));
                        baggageAdapter = new Meal_Adapter(getContext(), bagdetails);
                    }

                } else {

                }
            }
            else {
                for (int k = 0; k < Round_ViewFlight.final_sec_meal.size(); k++) {
                    String src_des = Round_ViewFlight.final_sec_meal.get(k);
                    bagdetails.add(new Meal_details("Onward", src_des, "Child -" + (i + 1), RoundFlightBookingPage_Int.titlemeal));
                    baggageAdapter = new Meal_Adapter(getContext(), bagdetails);
                }

                if(RoundFlightBookingPage_Int.titlemeal_return != null && !RoundFlightBookingPage_Int.titlemeal_return.isEmpty())
                {
                    for (int k = 0; k < Round_ViewFlight.final_sec_meal_return.size(); k++) {
                        String src_des1 = Round_ViewFlight.final_sec_meal_return.get(k);
                        bagdetails.add(new Meal_details("Return", src_des1, "Child -" + (i + 1), RoundFlightBookingPage_Int.titlemeal_return));
                        baggageAdapter = new Meal_Adapter(getContext(), bagdetails);
                    }
                }

            }

        }
    }



    listView.setAdapter(baggageAdapter);


    return views;

}

}

MEALCLASS的GETTER SETTER

public class Meal_Adapter extends BaseAdapter {
Context context;
public static ArrayList<String> spinner_items=new ArrayList<String>();
public static ArrayList<Meal_details> rowItems;
public static ArrayList<String> jeet_aar_meal=new ArrayList<String>();;

ArrayList<String> Bag_selected_amount= new ArrayList<String>();
ArrayList<String> Bag_selected__key= new ArrayList<String>();



Meal_Adapter(Context context, ArrayList rowItems) {

    this.context = context;
    this.rowItems = rowItems;

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

@Override
public Object getItem(int position) {
    return rowItems.get(position);
}

@Override
public long getItemId(int position)
{
    return rowItems.indexOf(getItem(position));
}

/* private view holder class */
private class ViewHolder {
    TextView sector,status;
    TextView title_count;
    Spinner spinner;
}

@Override
public View getView(int position, View convertView, ViewGroup parent)
{
    final ViewHolder holder;
    LayoutInflater mInflater = (LayoutInflater) context
            .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
    if (convertView == null) {
        convertView = mInflater.inflate(R.layout.meal_adapter, null);
        holder = new ViewHolder();
    }
    else
    {
        holder = (ViewHolder) convertView.getTag();
    }
    holder.status = (TextView) convertView.findViewById(R.id.meal_status);
    holder.sector = (TextView) convertView.findViewById(R.id.sector);
    holder.title_count = (TextView) convertView.findViewById(R.id.title_count);
    holder.spinner = (Spinner) convertView.findViewById(R.id.spinner);

    try
    {
        final Meal_details row_pos = rowItems.get(position);

        String status = String.valueOf(row_pos.getstatus());
        String title_count = String.valueOf(row_pos.gettitle_count());
        String sector=String.valueOf(row_pos.getsector_name());

        holder.status.setText(status);
        holder.sector.setText(sector);
        holder.title_count.setText(title_count);

        holder.spinner.setTag(title_count+status+sector);
        holder.spinner.setOnItemSelectedListener(MealSelectedListener);

            spinner_items = row_pos.getbaggage_list();




        holder.spinner = spinnerDetails(convertView, R.id.spinner, String.valueOf(rowItems.get(position).getbaggage_list()));
    }
    catch (Exception e)
    {
        Log.e("PASS_ADAP ERROR:", e.getMessage());
    }
    convertView.setTag(holder);
    return convertView;
}

private Spinner spinnerDetails(View v, int resId, String text) {
    Spinner mySpinner = (Spinner) v.findViewById(resId);

    @SuppressWarnings({ "unchecked", "rawtypes" })
    ArrayAdapter spinnerArrayAdapter = new ArrayAdapter(context,
            android.R.layout.simple_spinner_dropdown_item,
            spinner_items);
    mySpinner.setAdapter(spinnerArrayAdapter);

    return mySpinner;
}

}

BAGGAGE CLASS的GETTER SETTER

    public class Baggage_Adapter extends BaseAdapter {
Context context;
public static ArrayList<Baggage_details> rowItems;
public static ArrayList<String> spinner_items=new ArrayList<String>();
public static ArrayList<String> jeet_aar_bag=new ArrayList<String>();

ArrayList<String> Bag_selected_amount= new ArrayList<String>();
ArrayList<String> Bag_selected__key= new ArrayList<String>();

Baggage_Adapter(Context context, ArrayList rowItems) {

    this.context = context;
    this.rowItems = rowItems;

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

@Override
public Object getItem(int position) {
    return rowItems.get(position);
}

@Override
public long getItemId(int position)
{
    return rowItems.indexOf(getItem(position));
}

/* private view holder class */
private class ViewHolder {
    TextView sector,status;
    TextView title_count;
    Spinner spinner;
}

@Override
public View getView(int position, View convertView, ViewGroup parent)
{
    final ViewHolder holder;
    LayoutInflater mInflater = (LayoutInflater) context
            .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
    if (convertView == null) {
        convertView = mInflater.inflate(R.layout.baggage_adapter, null);
        holder = new ViewHolder();
    }
    else
    {
        holder = (ViewHolder) convertView.getTag();
    }
    holder.status = (TextView) convertView.findViewById(R.id.bag_status);
    holder.sector = (TextView) convertView.findViewById(R.id.sector);
    holder.title_count = (TextView) convertView.findViewById(R.id.title_count);
    holder.spinner = (Spinner) convertView.findViewById(R.id.spinner);
    try
    {
        final Baggage_details row_pos = rowItems.get(position);

        String status = String.valueOf(row_pos.getstatus());
        String title_count = String.valueOf(row_pos.gettitle_count());
        String sector=String.valueOf(row_pos.getsector_name());

        holder.status.setText(status);
        holder.sector.setText(sector);
        holder.title_count.setText(title_count);
        holder.spinner.setTag(title_count+status+sector);
        holder.spinner.setSelected(true);
        holder.spinner.setOnItemSelectedListener(BaggageSelectedListener);

            spinner_items = row_pos.getbaggage_list();



        holder.spinner = spinnerDetails(convertView, R.id.spinner, String.valueOf(rowItems.get(position).getbaggage_list()));
    }
    catch (Exception e)
    {
        Log.e("PASS_ADAP ERROR:", e.getMessage());
    }
    convertView.setTag(holder);
    return convertView;
}

private Spinner spinnerDetails(View v, int resId, String text) {
    Spinner mySpinner = (Spinner) v.findViewById(resId);

    @SuppressWarnings({ "unchecked", "rawtypes" })
    ArrayAdapter spinnerArrayAdapter = new ArrayAdapter(context,
            android.R.layout.simple_spinner_dropdown_item,
            spinner_items);
    mySpinner.setAdapter(spinnerArrayAdapter);

    return mySpinner;
}

}

任何人都可以指导我出错的地方。

我用过

viewPager.setOffscreenPageLimit（2）;

但它似乎不起作用。

Answer 1

如果我从生成的第一个微调器中选择项目，那么我得到的值它。但是当我选择不同的旋转器然后旋转器，我之前选择的选中位置为0。

在您的Baggage_details DTO中保留商店微调器选择的索引：

例如： -

1）使用getter / setter在您的Baggage_details类中添加一个新字段（例如-spinnerIndex = 0）。

2）获取选定的索引并在适配器的getView（）中的微调器中设置

 holder.spinner.setSelection(row_pos.getSpinnerIndex());

3）将此内容写入BaggageSelectedListener

row_pos.setSpinnerIndex(userSelectedIndexOfSpinner)

如何在viewpager中停止listview刷新

1 个答案: