我正在使用滑动选项卡的材料设计导航抽屉，并已经实现了相同的功能。现在我想在一个选项卡片段中添加带有recycler视图的cardview，但不知道如何操作。
请问是否有人能够帮助我？
以下是我的选项卡片段代码：
请问是否有人能够帮助我？
以下是我的选项卡片段代码：
public class TabFragment extends Fragment {
public static TabLayout tabLayout;
public static ViewPager viewPager;
public static int int_items = 2 ;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
/**
*Inflate tab_layout_tens and setup Views.
*/
View x = inflater.inflate(R.layout.tab_layout_tens,null);
tabLayout = (TabLayout) x.findViewById(R.id.tabs);
viewPager = (ViewPager) x.findViewById(R.id.viewpager);
/**
*Set an Apater for the View Pager
*/
viewPager.setAdapter(new MyAdapter(getChildFragmentManager()));
/**
* Now , this is a workaround ,
* The setupWithViewPager dose't works without the runnable .
* Maybe a Support Library Bug .
*/
tabLayout.post(new Runnable() {
@Override
public void run() {
tabLayout.setupWithViewPager(viewPager);
}
});
return x;
}
class MyAdapter extends FragmentPagerAdapter{
public MyAdapter(FragmentManager fm) {
super(fm);
}
/**
* Return fragment with respect to Position .
*/
@Override
public Fragment getItem(int position)
{
switch (position){
case 0 : return new CurrentFragment();
case 1 : return new FavouriteFragment();
}
return null;
}
@Override
public int getCount() {
return int_items;
}
/**
* This method returns the title of the tab according to the position.
*/
@Override
public CharSequence getPageTitle(int position) {
switch (position){
case 0 :
return "Current";
case 1 :
return "Favourite";
}
return null;
}
}
}
这是我的Fragment类，我已经添加了RecyclerView，但在设置适配器时出现了NULL Point异常。
public class FavouriteFragment extends Fragment {
private List<Person> persons;
private RecyclerView rv;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.favourite_layout,container,false);
RecyclerView rv = (RecyclerView)rootView.findViewById(R.id.rv);
final LinearLayoutManager llm = new LinearLayoutManager(getActivity());
rv.setLayoutManager(llm);
initializeData();
initializeAdapter();
return rootView;
}
private void initializeData(){
persons = new ArrayList<>();
persons.add(new Person("XYZ", "jhxdjksd", R.drawable.profilepic));
persons.add(new Person("ABC", "bsxhbs", R.drawable.profilepic));
persons.add(new Person("PQR", "bsahxb", R.drawable.profilepic));
}
private void initializeAdapter(){
RVAdapter adapter = new RVAdapter(persons);
rv.setAdapter(adapter);
}
}
MainActivity
public class Tens extends AppCompatActivity {
DrawerLayout mDrawerLayout;
NavigationView mNavigationView;
FragmentManager mFragmentManager;
FragmentTransaction mFragmentTransaction;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tens);
/**
*Setup the DrawerLayout and NavigationView
*/
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
mNavigationView = (NavigationView) findViewById(R.id.shitstuff) ;
/**
* Lets inflate the very first fragment
* Here , we are inflating the TabFragmentTens as the first Fragment
*/
mFragmentManager = getSupportFragmentManager();
mFragmentTransaction = mFragmentManager.beginTransaction();
mFragmentTransaction.replace(R.id.containerView,new TabFragmentTens()).commit();
/**
* Setup click events on the Navigation View Items.
*/
mNavigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
Fragment fragment = null;
Class fragmentClass = null;
switch(menuItem.getItemId()) {
case R.id.nav_item_tracker:
Intent intent = new Intent(
Tens.this, Tracker.class);
startActivity(intent);
break;
case R.id.nav_item_clinic:
fragmentClass = ClinicFragment.class;
break;
case R.id.nav_item_about:
Intent intent0 = new Intent(
Tens.this, AboutFragment.class);
startActivity(intent0);
break;
case R.id.nav_item_settings:
Intent intent1 = new Intent(
Tens.this, SettingsFragment.class);
startActivity(intent1);
break;
case R.id.nav_item_logout:
Intent intent2 = new Intent(
Tens.this, MainActivity.class);
startActivity(intent2);
break;
}
try {
fragment = (Fragment) fragmentClass.newInstance();
} catch (Exception e) {
e.printStackTrace();
}
FragmentTransaction xfragmentTransaction = mFragmentManager.beginTransaction();
xfragmentTransaction.replace(R.id.containerView, new TabFragmentTens()).commit();
mDrawerLayout.closeDrawers();
return false;
}
});
android.support.v7.widget.Toolbar toolbar = (android.support.v7.widget.Toolbar) findViewById(R.id.toolbar);
ActionBarDrawerToggle mDrawerToggle = new ActionBarDrawerToggle(this,mDrawerLayout, toolbar,R.string.app_name,
R.string.app_name);
mDrawerLayout.setDrawerListener(mDrawerToggle);
mDrawerToggle.syncState();
}
}
这是我的RecyclerView类：-
public class RVAdapter extends RecyclerView.Adapter<RVAdapter.PersonViewHolder> {
public static class PersonViewHolder extends RecyclerView.ViewHolder {
CardView cv;
TextView personName;
TextView personAge;
ImageView personPhoto;
PersonViewHolder(View itemView) {
super(itemView);
cv = (CardView)itemView.findViewById(R.id.cv);
personName = (TextView)itemView.findViewById(R.id.person_name);
personAge = (TextView)itemView.findViewById(R.id.person_age);
personPhoto = (ImageView)itemView.findViewById(R.id.person_photo);
}
}
List<Person> persons;
RVAdapter(List<Person> persons){
this.persons = persons;
}
@Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
}
@Override
public PersonViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.card_view_tens_fvrt, viewGroup, false);
PersonViewHolder pvh = new PersonViewHolder(v);
return pvh;
}
@Override
public void onBindViewHolder(PersonViewHolder personViewHolder, int i) {
personViewHolder.personName.setText(persons.get(i).name);
personViewHolder.personAge.setText(persons.get(i).age);
personViewHolder.personPhoto.setImageResource(persons.get(i).photoId);
}
@Override
public int getItemCount() {
return persons.size();
}
我想在Favourite片段中添加recycler view和cardview。我知道如何实现cardview，但无法在片段中实现它。