viewpager与FragmentPagerAdapter重复加载问题？

Question

当从tab1滑动到tab3，然后返回tab1，发现tab1的数据多加载了一遍，然后每次这样都会多加载一遍

打log打了一天不知道问题出在哪里

public class MainActivity2 extends AppCompatActivity {
    private TabLayout tabLayout;
    private ViewPager viewPager;
    String[]tabText={"tab1","tab2","tab3","tab4","tab5"};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_activity);
        tabLayout = (TabLayout) findViewById(R.id.tablayout);
        viewPager = (ViewPager) findViewById(R.id.Viewpager);
        for (int i=0;i<tabText.length;i++) {
            tabLayout.addTab(tabLayout.newTab().setText(tabText[i]));

        }
        MyAdpter2 myAdpter2 = new MyAdpter2(getSupportFragmentManager());
        viewPager.setAdapter(myAdpter2);
        //添加TabLayout变化监听
        viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
        //添加点击监听
        tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
            //标签选中之后执行的方法
            @Override
            public void onTabSelected(TabLayout.Tab tab) {
                viewPager.setCurrentItem(tab.getPosition());
            }
            //标签没选中
            @Override
            public void onTabUnselected(TabLayout.Tab tab) {

            }

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

            }
        });
    }
    class MyAdpter2 extends FragmentPagerAdapter{

        public MyAdpter2(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            switch (position)
            {
                case 0:
                    return new Fragment1();
                case 1:
                    return new Fragment2();
                case 2:
                    return new Fragment3();
                case 3:
                    return new Fragment4();
                case 4:
                    return new Fragment5();
            }

            return null;
        }

        @Override
        public int getCount() {
            return tabText.length;
        }
    }
}




//碎片1的代码
public class Fragment3 extends Fragment implements AdapterView.OnItemClickListener{
    private List<Character> list = new ArrayList<Character>();
    private int[] image1 = {R.drawable.icon_1tools,R.drawable.icon_2fire,R.drawable.icon_3survival,
            R.drawable.icon_4food,R.drawable.icon_5science,R.drawable.icon_6fight,R.drawable.icon_7build,
            R.drawable.icon_8refine,R.drawable.icon_9magic,R.drawable.icon_10dress,R.drawable.icon_11ancient_altar};
    private String[] name = {"1", "2", "3", "4", "5", "6", "7", "8",
            "9
            ", "10", "11"};

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

        View view = inflater.inflate(R.layout.gvmain_layout,container,false);
        addList();
        GridView gridView = (GridView) view.findViewById(R.id.main_gridlayout);
        MyAdapter adapter = new MyAdapter(getActivity(),R.layout.item,list);
        gridView.setAdapter(adapter);
        gridView.setOnItemClickListener(this);
        return view;
    }
    private void addList() {

        for (int i = 0; i < image1.length; i++) {
            list.add(new Character(name[i], image1[i]));
        }


    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

    }
    public class MyAdapter extends ArrayAdapter<Character> {
        public int resourceId;

        public MyAdapter(Context context, int resource, List<Character> objects) {
            super(context, resource, objects);
            resourceId =resource;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            Character character = getItem(position);//获得实例
            View view;
            ViewHoleder viewHoleder;
            if (convertView == null){

                view = LayoutInflater.from(getContext()).inflate(resourceId,null);
                viewHoleder = new ViewHoleder();
                viewHoleder.fruitImage = (ImageView) view.findViewById(R.id.image);
                viewHoleder.fruitName = (TextView) view.findViewById(R.id.text);
                view.setTag(viewHoleder);
            }else {

                view = convertView;
                viewHoleder = (ViewHoleder) view.getTag();
            }
            viewHoleder.fruitImage.setImageResource(character.getImageId());
            viewHoleder.fruitName.setText(character.getName());
            return view;
        }
        class ViewHoleder{
            ImageView fruitImage;
            TextView fruitName;
        }
    }

}

Answer 1

找到原因了，因为每次加载的时候addList()中的i没有存储，但是list的数据却存储下来了，i变成0，后又重新添加了数据一次