Android 如何通过单击可展开列表子项在viewpager中打开特定选项卡?
我使用的是可展开列表,当我单击子列表项时,会打开带有选定第一个选项卡的Viewpager,但我想打开我单击的Viewpager中的特定选项卡或片段。 假设我单击“移动开发”,我想在viewpager中打开移动开发选项卡。以下是我的代码: 可扩展列表视图:- 公共类服务\u片段扩展片段{Android 如何通过单击可展开列表子项在viewpager中打开特定选项卡?,android,android-fragments,android-viewpager,android-adapter,Android,Android Fragments,Android Viewpager,Android Adapter,我使用的是可展开列表,当我单击子列表项时,会打开带有选定第一个选项卡的Viewpager,但我想打开我单击的Viewpager中的特定选项卡或片段。 假设我单击“移动开发”,我想在viewpager中打开移动开发选项卡。以下是我的代码: 可扩展列表视图:- 公共类服务\u片段扩展片段{ ExpandableListAdapter listAdapter; ExpandableListView expListView; List<String> listDataHeader; Hash
ExpandableListAdapter listAdapter;
ExpandableListView expListView;
List<String> listDataHeader;
HashMap<String, List<String>> listDataChild;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.services_fragment, container, false);
((AppCompatActivity) getActivity()).getSupportActionBar().setTitle("Services");
expListView = (ExpandableListView) view.findViewById(R.id.service_listview);
prepareListData();
listAdapter = new ExpandableListAdapter(getActivity(), listDataHeader, listDataChild);
expListView.setAdapter(listAdapter);
expListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
Toast.makeText(
getActivity(),
listDataHeader.get(groupPosition)
+ " : "
+ listDataChild.get(
listDataHeader.get(groupPosition)).get(
childPosition), Toast.LENGTH_SHORT)
.show();
if (groupPosition == 0) {
Container_Activity.showFragment(new Development_fragment_viewpager(), "");
} else if (groupPosition == 1) {
Container_Activity.showFragment(new Designing_fragment_viewpager(), "");
} else if (groupPosition == 2) {
Container_Activity.showFragment(new Seo_fragment_viewpager(), "");
}
return false;
}
});
expListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
@Override
public void onGroupExpand(int groupPosition) {
Toast.makeText(getActivity(),
listDataHeader.get(groupPosition) + " Expanded",
Toast.LENGTH_SHORT).show();
}
});
return view;
}
private void prepareListData() {
listDataHeader = new ArrayList<String>();
listDataChild = new HashMap<String, List<String>>();
listDataHeader.add("Development");
listDataHeader.add("Designing");
listDataHeader.add("SEO & SEM");
List<String> development = new ArrayList<String>();
development.add("Web Development");
development.add("Mobile Development");
development.add("Software Development");
List<String> designing = new ArrayList<String>();
designing.add("Logo");
designing.add("Brochure");
designing.add("Catalog");
designing.add("Other 3D Design");
List<String> seosem = new ArrayList<String>();
seosem.add("SEO");
seosem.add("SMM");
listDataChild.put(listDataHeader.get(0), development); // Header, Child data
listDataChild.put(listDataHeader.get(1), designing);
listDataChild.put(listDataHeader.get(2), seosem);
}
TabLayout tabLayout;
ViewPager viewPager;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
final View view=inflater.inflate(R.layout.development_fragment_viewpager,container,false);
tabLayout= (TabLayout) view.findViewById(R.id.tabLayout_development);
tabLayout.setupWithViewPager(viewPager);
tabLayout.addTab(tabLayout.newTab().setText("Web Development"));
tabLayout.addTab(tabLayout.newTab().setText("Mobile Development"));
tabLayout.addTab(tabLayout.newTab().setText(" Software Development"));
tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
viewPager= (ViewPager) view.findViewById(R.id.development_pager);
Development_Adapter adapter = new Development_Adapter(getChildFragmentManager(), tabLayout.getTabCount());
viewPager.setAdapter(adapter);
tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@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) {
}
});
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
return view;
}
}
适配器类:-
公共类开发适配器扩展FragmentStatePagerAdapter{
int TabCount;
public Development_Adapter(FragmentManager fm,int TabCount) {
super(fm);
this.TabCount=TabCount;
}
@Override
public Fragment getItem(int position) {
switch (position){
case 0:
Web_development_fragment web_development_fragment=new Web_development_fragment();
return web_development_fragment;
case 1:
Mobileapplication_fragment mobileapplication_fragment=new Mobileapplication_fragment();
return mobileapplication_fragment;
case 2:
Software_development software_development=new Software_development();
return software_development;
default:
return null;
}
}
@Override
public int getCount() {
return TabCount;
}
}您可以在片段中设置参数,并在片段中获取数据
Fragment fragment=new new Development_fragment_viewpager();
Bundle bundle1=new Bundle();
bundle.putInt("PagePosition",2);
fragment.setArguments(bundle1);
Container_Activity.showFragment(fragment,"");
现在在您的片段覆盖oncreate方法中
int pageno=0;
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bundle bundle=getArguments();
if (bundle!=null){
pageno=bundle.getInt("PagePosition");
}
}
现在,在onCrateView中,只需调用一个方法
viewPager.setCurrentItem(pageno, false);
并且它已经完成了使用viewpager.setCurrentItem(索引)function@Keerthivasan你能举个例子解释一下吗,,每次打开pageposition 2 itemin Bundle时,我都会选择子列表中的任何项目。我已传递了页码,因此您必须传递要打开iti的Bundle中的页码。我也传递了Bundle中的页码,但始终显示我传递的位置没有任何更改。您只想打开列表上的特定选项卡单击“什么?”否则你想在我的viewpager中有三个选项卡,在第一组可展开列表中有三个子项,这三个项等于三个选项卡布局,然后我想在列表中单击“Web开发”在viewpager中打开一个webdevelopment选项卡。单击“软件开发”打开一个软件开发选项卡,如下所示。