Android 如何在RecyclerView.Adapter类中获取活动按钮单击侦听器
当用户按#按钮时,它将在RecyclerView的聚焦编辑文本上打印#,这有多可能。 我的代码和输出如下。 请帮帮我 我什么都做了,但是被困在这里了。我能得到一些关于如何实现这一点的建议或链接吗 activity_main.xmlAndroid 如何在RecyclerView.Adapter类中获取活动按钮单击侦听器,android,android-edittext,android-recyclerview,Android,Android Edittext,Android Recyclerview,当用户按#按钮时,它将在RecyclerView的聚焦编辑文本上打印#,这有多可能。 我的代码和输出如下。 请帮帮我 我什么都做了,但是被困在这里了。我能得到一些关于如何实现这一点的建议或链接吗 activity_main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<Button
android:id="@+id/btnAt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="\@" />
<Button
android:id="@+id/btnHash"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="\#" />
</LinearLayout>
<android.support.v7.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
MainActivity.java
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private RecyclerView mRecyclerView; // RecyclerVIew
private CheckItemAdapter myAdapterRecyclerView; //The Adapter for RecyclerVIew
Button btnAt, btnHash;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mRecyclerView = (RecyclerView) findViewById(R.id.recyclerView);
setAdapter();
btnAt = (Button) findViewById(R.id.btnAt);
btnHash = (Button) findViewById(R.id.btnHash);
}
public void setAdapter() {
mRecyclerView.setLayoutManager(new LinearLayoutManager(this)); // Set LayoutManager in the RecyclerView
myAdapterRecyclerView = new CheckItemAdapter(this, getData()); // Create Instance of MyAdapterRecyclerView
mRecyclerView.setAdapter(myAdapterRecyclerView); // Set Adapter for RecyclerView
}
public ArrayList<ItemModel> getData() {
ArrayList<ItemModel> itemModelArrayList = new ArrayList<ItemModel>();
ItemModel itemModel = new ItemModel();
itemModel.setChkText("ABC");
itemModelArrayList.add(itemModel);
itemModel = new ItemModel();
itemModel.setChkText("ABC");
itemModelArrayList.add(itemModel);
itemModel = new ItemModel();
itemModel.setChkText("ABC");
itemModelArrayList.add(itemModel);
itemModel = new ItemModel();
itemModel.setChkText("ABC");
itemModelArrayList.add(itemModel);
itemModel = new ItemModel();
itemModel.setChkText("ABC");
itemModelArrayList.add(itemModel);
itemModel = new ItemModel();
itemModel.setChkText("ABC");
itemModelArrayList.add(itemModel);
itemModel = new ItemModel();
itemModel.setChkText("ABC");
itemModelArrayList.add(itemModel);
return itemModelArrayList;
}
@Override
public void onClick(View v) {
if (v.getId() == R.id.btnAt) {
//print @ on focused EditText of RecyclerView item
} else if (v.getId() == R.id.btnHash) {
//print # on focused EditText of RecyclerView item
}
}
}
public类MainActivity扩展AppCompatActivity实现View.OnClickListener{
private RecyclerView mRecyclerView;//RecyclerView
private CheckItemAdapter MyAdapterRecyclView;//RecyclView的适配器
按钮btnAt,btnHash;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mRecyclerView=(RecyclerView)findViewById(R.id.RecyclerView);
setAdapter();
btnAt=(按钮)findviewbyd(R.id.btnAt);
btnHash=(按钮)findViewById(R.id.btnHash);
}
公共void setAdapter(){
mRecyclerView.setLayoutManager(新的LinearLayoutManager(this));//在RecyclerView中设置LayoutManager
MyAdapterRecyclView=new CheckItemAdapter(this,getData());//创建MyAdapterRecyclView的实例
mRecyclerView.setAdapter(myAdapterRecyclerView);//为RecyclerView设置适配器
}
公共ArrayList getData(){
ArrayList itemModelArrayList=新的ArrayList();
ItemModel ItemModel=新的ItemModel();
itemModel.setChkText(“ABC”);
itemModelArrayList.add(itemModel);
itemModel=新的itemModel();
itemModel.setChkText(“ABC”);
itemModelArrayList.add(itemModel);
itemModel=新的itemModel();
itemModel.setChkText(“ABC”);
itemModelArrayList.add(itemModel);
itemModel=新的itemModel();
itemModel.setChkText(“ABC”);
itemModelArrayList.add(itemModel);
itemModel=新的itemModel();
itemModel.setChkText(“ABC”);
itemModelArrayList.add(itemModel);
itemModel=新的itemModel();
itemModel.setChkText(“ABC”);
itemModelArrayList.add(itemModel);
itemModel=新的itemModel();
itemModel.setChkText(“ABC”);
itemModelArrayList.add(itemModel);
返回itemModelArrayList;
}
@凌驾
公共void onClick(视图v){
if(v.getId()==R.id.btnAt){
//在RecyclerView项的文本上打印@
}else if(v.getId()==R.id.btnHash){
//在RecyclerView项的聚焦编辑文本上打印
}
}
}
CheckItemAdapter
public class CheckItemAdapter extends RecyclerView.Adapter<CheckItemAdapter.MyViewHolder> {
private ArrayList<ItemModel> mList;
Context context;
public CheckItemAdapter(Context context, ArrayList<ItemModel> mList) {
this.mList = mList;
this.context = context;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { // create a new view
View itemLayoutView = LayoutInflater.from(context).inflate(R.layout.single_check_list, parent, false);
// create ViewHolder
MyViewHolder viewHolder = new MyViewHolder(itemLayoutView);
return viewHolder;
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
ItemModel itemModel = mList.get(position);
holder.editCheckItem.setText(itemModel.getChkText());
}
@Override
public int getItemCount() {
if (mList != null)
return mList.size();
else
return 0;
}
public class MyViewHolder extends RecyclerView.ViewHolder {
public EditText editCheckItem;
public CheckBox chkItem;
public TextView txtRemove;
public MyViewHolder(View itemLayoutView) {
super(itemLayoutView);
editCheckItem = (EditText) itemLayoutView.findViewById(R.id.editCheckItem);
}
}
}
[![output image][1]][1]
公共类CheckItemAdapter扩展了RecyclerView.Adapter{
私有数组列表;
语境;
公共CheckItemAdapter(上下文,ArrayList mList){
this.mList=mList;
this.context=上下文;
}
@凌驾
public MyViewHolder onCreateViewHolder(视图组父级,int-viewType){//创建新视图
View itemLayoutView=LayoutFlater.from(上下文)。充气(R.layout.single\u check\u list,parent,false);
//创建视图持有者
MyViewHolder viewHolder=新的MyViewHolder(itemLayoutView);
返回视图持有者;
}
@凌驾
公共无效onBindViewHolder(MyViewHolder,int位置){
ItemModel ItemModel=mList.get(位置);
holder.editCheckItem.setText(itemModel.getChkText());
}
@凌驾
public int getItemCount(){
如果(mList!=null)
返回mList.size();
其他的
返回0;
}
公共类MyViewHolder扩展了RecyclerView.ViewHolder{
公共编辑文本编辑检查项;
公共卫生设施;
公共文本视图txtRemove;
公共MyViewHolder(视图项布局视图){
超级(itemLayoutView);
editCheckItem=(EditText)itemLayoutView.findViewById(R.id.editCheckItem);
}
}
}
[![输出图像][1][1]
创建自己的单击侦听器
private static OnItemClickListener listener;
public interface OnItemClickListener {
void onItemClick(View itemView, int position);
}
public void setOnItemClickListener(OnItemClickListener listener) {
YourAdapterClass.listener = listener;
}
// and in constructor of ViewHolder use it.
yourButtonView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (listener != null) {
listener.onItemClick(itemView, getLayoutPosition());
}
}
});
所以代码应该在您的RecyclerView适配器中。在活动/片段中,您只需要使用适配器的方法setOnItemClickListener。这是您提问的正常做法。在活动中将按钮声明为静态按钮 例如: 实际上:
public static Button btnTest;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_family_member);
btnTest = (Button)findviewbyid(R.id.btnTest);
}
在Adpter中:
ABCActivity.btnTest.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
您应该像这样在BindViewHolder中选中焦点:
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
ItemModel itemModel = mList.get(position);
holder.editCheckItem.setText(itemModel.getChkText());
if(holder.editCheckItem.hasFocus()) {
// Add your # character to your edit text
holder.editCheckItem.append("#");
}
}
然后,只需通知您的适配器:
@Override
public void onClick(View v) {
if (v.getId() == R.id.btnAt) {
//print @ on focused EditText of RecyclerView item
} else if (v.getId() == R.id.btnHash) {
//print # on focused EditText of RecyclerView item
myAdapterRecyclerView.notifyDataChanged();
}
}
我试过这个。。。它将在最后一个位置添加#每次EditText我必须在活动中编写哪些代码以及我必须在适配器中编写哪些代码请解释me@MihirPatel您应该在Adapter/ViewHolder类中编写的所有代码。在活动中,您只需要适配器.setOnItemClickListener(新的适配器类.OnItemClickListener(…){…});我猜当你点击#按钮时,你的编辑文本会在失去焦点之前点击。你应该像这样处理这个问题:EditText是焦点