recycleview和fragment以及ViewPager2的主页面代码
时间: 2023-06-02 18:01:42 浏览: 79
以下是一个包含RecyclerView、Fragment和ViewPager2的主页面代码示例:
MainActivity.java
```
public class MainActivity extends AppCompatActivity {
private ViewPager2 viewPager;
private TabLayout tabLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewPager = findViewById(R.id.viewPager);
tabLayout = findViewById(R.id.tabLayout);
ArrayList<String> titles = new ArrayList<>();
titles.add("Tab 1");
titles.add("Tab 2");
viewPager.setAdapter(new ViewPagerAdapter(this, titles));
new TabLayoutMediator(tabLayout, viewPager,
(tab, position) -> tab.setText(titles.get(position))
).attach();
}
}
```
ViewPagerAdapter.java
```
public class ViewPagerAdapter extends FragmentStateAdapter {
private final ArrayList<String> titles;
public ViewPagerAdapter(@NonNull FragmentActivity fragmentActivity, ArrayList<String> titles) {
super(fragmentActivity);
this.titles = titles;
}
@NonNull
@Override
public Fragment createFragment(int position) {
switch (position) {
case 0:
return new Tab1Fragment();
case 1:
return new Tab2Fragment();
default:
return null;
}
}
@Override
public int getItemCount() {
return titles.size();
}
}
```
Tab1Fragment.java
```
public class Tab1Fragment extends Fragment {
private RecyclerView recyclerView;
private ArrayList<String> itemList;
public Tab1Fragment() {
// Required empty public constructor
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
itemList = new ArrayList<>();
for (int i = 1; i <= 20; i++) {
itemList.add("Item " + i);
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_tab1, container, false);
recyclerView = view.findViewById(R.id.recyclerView);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
recyclerView.setAdapter(new RecyclerViewAdapter(itemList));
return view;
}
}
```
Tab2Fragment.java
```
public class Tab2Fragment extends Fragment {
public Tab2Fragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_tab2, container, false);
}
}
```
RecyclerViewAdapter.java
```
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private final ArrayList<String> itemList;
public RecyclerViewAdapter(ArrayList<String> itemList) {
this.itemList = itemList;
}
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.item_layout, parent, false);
return new ItemViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
((ItemViewHolder) holder).bind(itemList.get(position));
}
@Override
public int getItemCount() {
return itemList.size();
}
public static class ItemViewHolder extends RecyclerView.ViewHolder {
private final TextView textView;
public ItemViewHolder(@NonNull View itemView) {
super(itemView);
textView = itemView.findViewById(R.id.textView);
}
public void bind(String item) {
textView.setText(item);
}
}
}
```
activity_main.xml
```
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.material.tabs.TabLayout
android:id="@+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabGravity="fill"
app:tabMode="fixed" />
<androidx.viewpager2.widget.ViewPager2
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@id/tabLayout" />
</RelativeLayout>
```
fragment_tab1.xml
```
<?xml version="1.0" encoding="utf-8"?>
<androidx.recyclerview.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
```
fragment_tab2.xml
```
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Tab 2" />
</LinearLayout>
```
item_layout.xml
```
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
```