Android Java RecyclerView轮播图实现无限手动轮播,完整代码
时间: 2023-11-16 08:06:57 浏览: 170
Android首页无限轮播功能的示例代码
以下是一个简单的Android Java RecyclerView轮播图实现无限手动轮播的完整代码:
1. 首先,在你的布局文件中添加RecyclerView控件:
```
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
```
2. 创建一个RecyclerAdapter类,用于设置RecyclerView的适配器:
```
public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.ViewHolder> {
private Context context;
private List<Integer> imageList;
public RecyclerAdapter(Context context, List<Integer> imageList) {
this.context = context;
this.imageList = imageList;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.item_image, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
// 设置图片
holder.imageView.setImageResource(imageList.get(position % imageList.size()));
}
@Override
public int getItemCount() {
// 返回一个较大的数,使RecyclerView可以无限循环
return Integer.MAX_VALUE;
}
public static class ViewHolder extends RecyclerView.ViewHolder {
ImageView imageView;
public ViewHolder(@NonNull View itemView) {
super(itemView);
imageView = itemView.findViewById(R.id.image_view);
}
}
}
```
3. 创建一个MainActivity类,用于设置RecyclerView的布局管理器和数据源:
```
public class MainActivity extends AppCompatActivity {
private RecyclerView recyclerView;
private RecyclerAdapter adapter;
private List<Integer> imageList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 初始化数据源
imageList = new ArrayList<>();
imageList.add(R.drawable.image1);
imageList.add(R.drawable.image2);
imageList.add(R.drawable.image3);
// 初始化RecyclerView
recyclerView = findViewById(R.id.recycler_view);
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
layoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);
recyclerView.setLayoutManager(layoutManager);
adapter = new RecyclerAdapter(this, imageList);
recyclerView.setAdapter(adapter);
// 设置自动轮播
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
int position = recyclerView.getCurrentItem();
recyclerView.setCurrentItem(position + 1);
new Handler().postDelayed(this, 3000);
}
}, 3000);
}
}
```
4. 创建一个item_image.xml布局文件,用于设置每个轮播图的样式:
```
<ImageView
android:id="@+id/image_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop" />
```
这样,你就可以实现一个简单的Android Java RecyclerView轮播图了,支持无限循环和自动轮播。
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