在 Android 的 Fragment 中让
TextList 滚动起来，可借助 `ListView` 或者 `RecyclerView` 来实现。以下是使用 `ListView` 和 `RecyclerView` 的示例代码。
### 使用 `ListView`
1. **在布局文件里添加 `ListView`**
```xml
<!-- my_fragment.xml -->
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView
android:id="@+id/listView"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</FrameLayout>
```
2. **在 Fragment 中设置 `ListView` 及其适配器**
```java
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import java.util.ArrayList;
import java.util.List;
public class MyFragment extends Fragment {
private List<String>
textList = new ArrayList<>();
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.my_fragment, container, false);
// 初始化数据
for (int i = 0; i < 20; i++) {
textList.add("Item " + i);
}
// 获取 ListView
ListView listView = view.findViewById(R.id.listView);
// 创建适配器
ArrayAdapter<String> adapter = new ArrayAdapter<>(requireContext(), android.R.layout.simple_list_item_1,
textList);
// 设置适配器
listView.setAdapter(adapter);
return view;
}
}
```
### 使用 `RecyclerView`
1. **在布局文件中添加 `RecyclerView`**
```xml
<!-- my_fragment.xml -->
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</FrameLayout>
```
2. **创建 `RecyclerView` 的适配器**
```java
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import java.util.List;
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
private List<String>
textList;
public MyAdapter(List<String>
textList) {
this.
textList =
textList;
}
@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(android.R.layout.simple_list_item_1, parent, false);
return new MyViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {
holder.textView.setText(
textList.get(position));
}
@Override
public int getItemCount() {
return
textList.size();
}
public static class MyViewHolder extends RecyclerView.ViewHolder {
TextView textView;
public MyViewHolder(@NonNull View itemView) {
super(itemView);
textView = itemView.findViewById(android.R.id.text1);
}
}
}
```
3. **在 Fragment 中设置 `RecyclerView` 及其适配器**
```java
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import java.util.ArrayList;
import java.util.List;
public class MyFragment extends Fragment {
private List<String>
textList = new ArrayList<>();
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.my_fragment, container, false);
// 初始化数据
for (int i = 0; i < 20; i++) {
textList.add("Item " + i);
}
// 获取 RecyclerView
RecyclerView recyclerView = view.findViewById(R.id.recyclerView);
// 设置布局管理器
recyclerView.setLayoutManager(new LinearLayoutManager(requireContext()));
// 创建适配器
MyAdapter adapter = new MyAdapter(
textList);
// 设置适配器
recyclerView.setAdapter(adapter);
return view;
}
}
```
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