要实现Android搜索视图过滤器RecyclerView Volley,可以按照以下步骤进行操作:
dependencies {
implementation 'com.android.volley:volley:1.2.0'
}
public class MyAdapter extends RecyclerView.Adapter implements Filterable {
private List originalList; // 原始数据列表
private List filteredList; // 过滤后的数据列表
public MyAdapter(List list) {
originalList = list;
filteredList = list;
}
// 创建ViewHolder
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_layout, parent, false);
return new ViewHolder(view);
}
// 绑定ViewHolder
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
String item = filteredList.get(position);
holder.textView.setText(item);
}
// 获取数据项数量
@Override
public int getItemCount() {
return filteredList.size();
}
// 获取过滤器
@Override
public Filter getFilter() {
return new Filter() {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
List filtered = new ArrayList<>();
if (TextUtils.isEmpty(constraint)) {
filtered = originalList;
} else {
String filterPattern = constraint.toString().toLowerCase().trim();
for (String item : originalList) {
if (item.toLowerCase().contains(filterPattern)) {
filtered.add(item);
}
}
}
results.values = filtered;
results.count = filtered.size();
return results;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
filteredList = (List) results.values;
notifyDataSetChanged();
}
};
}
// ViewHolder类
public static class ViewHolder extends RecyclerView.ViewHolder {
TextView textView;
public ViewHolder(View itemView) {
super(itemView);
textView = itemView.findViewById(R.id.text_view);
}
}
}
public class MainActivity extends AppCompatActivity {
private RecyclerView recyclerView;
private EditText searchEditText;
private MyAdapter adapter;
private List dataList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView = findViewById(R.id.recycler_view);
searchEditText = findViewById(R.id.search_edit_text);
// 初始化数据列表
dataList = new ArrayList<>();
dataList.add("Apple");
dataList.add("Banana");
dataList.add("Orange");
dataList.add("Pineapple");
// 创建适配器
adapter = new MyAdapter(dataList);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setAdapter(adapter);
// 设置搜索视图的监听器
searchEditText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
adapter.getFilter().filter(s);
}
@Override
public void afterTextChanged(Editable s) {
}
});
}
}
以上代码示例实现了一个简单的RecyclerView和搜索视图的过滤器功能。当用户输入文字时,RecyclerView会根据输入内容进行过滤,并显示过滤后的结果。