帮我写一个用recyclerView设置数组适配器
时间: 2024-05-01 10:21:42 浏览: 90
好的,这里给您提供一个使用RecyclerView设置数组适配器的示例代码:
1. 首先,需要在 build.gradle 文件中添加 RecyclerView 的依赖:
```
implementation 'androidx.recyclerview:recyclerview:1.2.0'
```
2. 在布局文件中添加 RecyclerView:
```xml
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
```
3. 创建一个自定义的 Adapter 类,继承自 RecyclerView.Adapter,并实现以下方法:
```java
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
private String[] mData;
public MyAdapter(String[] data) {
mData = data;
}
@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.item_layout, parent, false);
return new MyViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {
holder.textView.setText(mData[position]);
}
@Override
public int getItemCount() {
return mData.length;
}
static class MyViewHolder extends RecyclerView.ViewHolder {
TextView textView;
public MyViewHolder(View itemView) {
super(itemView);
textView = itemView.findViewById(R.id.textView);
}
}
}
```
4. 创建一个布局文件作为 RecyclerView 的每个 Item 的样式,例如 item_layout.xml:
```xml
<TextView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="16dp"
android:textSize="18sp" />
```
5. 在 Activity 或 Fragment 中,初始化 RecyclerView 和 Adapter,并将 Adapter 设置给 RecyclerView:
```java
public class MainActivity extends AppCompatActivity {
private RecyclerView mRecyclerView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mRecyclerView = findViewById(R.id.recyclerView);
String[] data = new String[]{"Item 1", "Item 2", "Item 3", "Item 4", "Item 5"};
MyAdapter adapter = new MyAdapter(data);
mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
mRecyclerView.setAdapter(adapter);
}
}
```
这样就完成了使用 RecyclerView 设置数组适配器的过程。希望对您有所帮助!
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