问题描述
我创建了一个主页片段,并在里面创建了选项卡布局并使用了一个 java 类并扩展了 fragmentPagerAdapter
然后当我想初始化主页片段中的 TabAdapter 时需要 getSupportFragmentManager
并且我无法设置它一个片段(家庭片段)我能做些什么来修复它?
我的 TabAdapter 代码:
import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentPagerAdapter;
public class TabAdapter extends FragmentPagerAdapter {
private int numberOfTabs;
public TabAdapter(FragmentManager fm,int behavior) {
super(fm);
this.numberOfTabs = behavior;
}
@NonNull
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new MobileCatFragment();
case 1:
return new TabletCatFragment();
case 2:
return new LaptopCatFragment();
default:
return null;
}
}
@Override
public int getCount() {
return numberOfTabs;
}
}
和我尝试初始化 TabAdapter 时的主片段:
TabAdapter tabAdapter = new TabAdapter( ???,tlCategory.getTabCount());
tlCategory 是我的 TabLayout...
更新:
这是我的家庭片段代码:
@Override
public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_home,container,false);
progressDialog = new ProgressDialog(getContext());
sessionManager = new SessionManager(getContext());
TabAdapter tabAdapter = new TabAdapter(getChildFragmentManager(),tlCategory.getTabCount());
imgBtnSearch = view.findViewById(R.id.imgBtnSearch);
imgBtnSearch.setonClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
searchDialog();
}
});
svBanner = view.findViewById(R.id.svBanner);
svBanner.setAutoCycle(true);
svBanner.setScrollTimeInSec(8);
svBanner.setIndicatorAnimation(IndicatorAnimationType.WORM);
showBanner();
tlCategory = view.findViewById(R.id.tlCategory);
tiMobile = view.findViewById(R.id.tiMobile);
tiTablet = view.findViewById(R.id.tiTablet);
tiLaptop = view.findViewById(R.id.tiLaptop);
vpTabs = vpTabs.findViewById(R.id.vpTabs);
vpTabs.setAdapter(tabAdapter);
tlCategory.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
vpTabs.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
return view;
}
解决方法
如果您从片段调用 TabAdapter,请使用 SELECT *
FROM table
WHERE COALESCE(textfield,text2,'X') != 'Word'
你是从 AppCompatActivity/Activity 调用 TabAdapter 吗?
TabAdapter tabAdapter = new TabAdapter( getChildFragmentManager(),tlCategory.getTabCount());
您需要使用 getFragmentManager()
它应该是 ChildFragmentManager 因为你不能用 Fragment 引用调用 getSupportFragmentManger()
TabAdapter tabAdapter = new TabAdapter( getChildFragmentManager(),tlCategory.getTabCount());
或者您有活动参考电话
requirActivity().getSupportFragmentManager()