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;
}
}
}慕数据2535060