[英]How can I make a click for Recycler View and scan with equals? - Java
由于 ListView 不够优化,我决定切换到 Recycler View。 打我的第一个问题是这个。
我的 RecyclerView 适配器:
public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.ViewHolder> {
private List<String> mData;
private LayoutInflater mInflater;
private ItemClickListener mClickListener;
// data is passed into the constructor
MyRecyclerViewAdapter(Context context, List<String> data) {
this.mInflater = LayoutInflater.from(context);
this.mData = data;
}
// inflates the row layout from xml when needed
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = mInflater.inflate(R.layout.adapter_box, parent, false);
return new ViewHolder(view);
}
// binds the data to the TextView in each row
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
String animal = mData.get(position);
holder.myTextView.setText(animal);
}
// total number of rows
@Override
public int getItemCount() {
return mData.size();
}
// stores and recycles views as they are scrolled off screen
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
TextView myTextView;
ViewHolder(View itemView) {
super(itemView);
myTextView = itemView.findViewById(R.id.text_adapter);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View view) {
if (mClickListener != null) mClickListener.onItemClick(view, getAdapterPosition());
}
}
// convenience method for getting data at click position
String getItem(int id) {
return mData.get(id);
}
// allows clicks events to be caught
void setClickListener(ItemClickListener itemClickListener) {
this.mClickListener = itemClickListener;
}
// parent activity will implement this method to respond to click events
public interface ItemClickListener {
void onItemClick(View view, int position);
}
使用 ListView 我可以这样做:
ListView listView = findViewById(R.id.testL);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if (parent.getItemAtPosition(position).equals("hello")) {
TextView details = word_dialog.findViewById(R.id.word_edit_desc);
details.setText("hello");
}
}
});
我如何才能获得相同的结果,但只能使用回收视图?:
@Override
public void onItemClick(View view, int position) {
}
如果您能帮助我,我将不胜感激!
我希望能够单击 MainActivity.java 中的回收器视图项目,我已经做到了,现在我需要能够对使用等号排序的每一行执行自己的操作
ArrayList<String> animalNames = new ArrayList<>();
animalNames.add("Dog");
animalNames.add("Cow");
animalNames.add("Camel");
animalNames.add("Sheep");
animalNames.add("Goat");
// set up the RecyclerView
recyclerView = findViewById(R.id.myList);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
adapter = new MyRecyclerViewAdapter(this, animalNames);
adapter.setClickListener(this);
recyclerView.setAdapter(adapter);
if (somecode.equals("Dog")){
soundPlay(MediaPlayer.create(getBaseContext(), R.raw.star));
}
if (somecode.equals("Camel")){
soundPlay(MediaPlayer.create(getBaseContext(), R.raw.tick));
}
这是 Recyclerview 的 Inbuild Click 事件和另一种使用界面的方法
holder.itemView.setOnClickListener(v ->
if (animal.equals("Your animal String"){
//Your code
}
);
如果想使用界面那么这是参考链接
您可以在适配器中定义一个接口,如下所示
public interface ClickListener{
void onClick();
}
在片段或活动中实施您的适配器:
ClickListener listener = () ->{
TextView details = word_dialog.findViewById(R.id.word_edit_desc);
details.setText("hello");
}
然后使用构造函数或 setter 将接口传递给适配器,您可以在绑定时在 viewHolder 中使用接口,如下所示:
itemView.setOnClickListener(()->{
if (your_list.get(getAdapterPosition()).equals("hello")) {
interface_var_name.onClick()
}
});
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