recycleview和fragment的主页面代码
时间: 2023-05-30 14:08:05 浏览: 55
以下是一个使用RecyclerView和Fragment的主页面代码示例:
MainActivity.java
```
public class MainActivity extends AppCompatActivity {
private RecyclerView mRecyclerView;
private MyAdapter mAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mRecyclerView = findViewById(R.id.recycler_view);
mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
mAdapter = new MyAdapter(getSupportFragmentManager());
mRecyclerView.setAdapter(mAdapter);
}
}
```
activity_main.xml
```
<?xml version="1.0" encoding="utf-8"?>
<androidx.recyclerview.widget.RecyclerView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
```
MyAdapter.java
```
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
private static final int NUM_PAGES = 3;
private FragmentManager mFragmentManager;
public MyAdapter(FragmentManager fragmentManager) {
mFragmentManager = fragmentManager;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.item_page, parent, false);
return new MyViewHolder(view);
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
holder.bind(position);
}
@Override
public int getItemCount() {
return NUM_PAGES;
}
public class MyViewHolder extends RecyclerView.ViewHolder {
private FrameLayout mContainer;
public MyViewHolder(View itemView) {
super(itemView);
mContainer = itemView.findViewById(R.id.container);
}
public void bind(int position) {
Fragment fragment = new MyFragment();
Bundle args = new Bundle();
args.putInt(MyFragment.ARG_PAGE_NUMBER, position + 1);
fragment.setArguments(args);
mFragmentManager.beginTransaction()
.replace(mContainer.getId(), fragment)
.commit();
}
}
}
```
item_page.xml
```
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
```
MyFragment.java
```
public class MyFragment extends Fragment {
public static final String ARG_PAGE_NUMBER = "page_number";
private int mPageNumber;
public MyFragment() {
// Required empty public constructor
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mPageNumber = getArguments().getInt(ARG_PAGE_NUMBER);
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_my, container, false);
TextView textView = view.findViewById(R.id.text_view);
textView.setText("Page " + mPageNumber);
return view;
}
}
```
fragment_my.xml
```
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/text_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:textSize="36sp" />
```
在这个示例中,RecyclerView用于显示多个页面(每个页面都是一个Fragment),而MyAdapter负责将页面绑定到RecyclerView。每个页面由一个FrameLayout容器包含,并使用FragmentManager动态添加Fragment。每个Fragment都有一个参数,用于指示它是第几页。最后,每个Fragment都显示一个文本视图,显示它是第几页。