[英]Create Base Adapters For All Recycler View Adapters
public abstract class BaseAdapters extends RecyclerView.Adapter<BaseAdapters.MyViewHolder> implements View.OnClickListener {
protected Context parentContext;
public int layout_id;
protected List<?> dataList = new ArrayList<>();
public class MyViewHolder extends RecyclerView.ViewHolder {
MyViewHolder(View view) {
super(view);
declareViews(view,this);
}
}
@Override
public void onClick(View view) {
onClickViews(view);
}
@Override
public int getItemViewType(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public void onBindViewHolder(@NonNull MyViewHolder holder, int i) {
bindView(holder, i);
}
public void notifyList(List<?> filterdNames) {
this.dataList = filterdNames;
notifyDataSetChanged();
}
@Override
public int getItemCount() {
if (dataList.size() == 0)
return 5;
else
return dataList.size();
}
@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int i) {
View itemView = LayoutInflater.from(parent.getContext()).inflate(layout_id, parent, false);
return new MyViewHolder(itemView);
}
public abstract MyViewHolder bindView(MyViewHolder holder, int position);
public abstract void onClickViews(View view);
public abstract void declareViews(View view,MyViewHolder holder);
}
How can i perform on click of every item selection using holder in child class extending with it.我如何在使用它扩展的子类中的持有人点击每个项目选择时执行。
import android.app.Activity;
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import java.util.ArrayList;
import java.util.List;
public abstract class BaseAdapter extends RecyclerView.Adapter<BaseAdapter.MyViewHolder> {
public int layout_id;
protected List<?> dataList = new ArrayList<>();
Context BASE_CONTEXT;
public View itemview;
public BaseAdapter(Context context) {
this.BASE_CONTEXT = context;
}
@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(layout_id, viewGroup, false);
return new MyViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull MyViewHolder viewHolder, int position) {
onBindViewHold(position, dataList.get(position));
}
public abstract View getView(View view);
@Override
public int getItemCount() {
return dataList.size() == 0 ? 0 : dataList.size();
}
public abstract void onBindViewHold(int position, Object itemView);
class MyViewHolder extends RecyclerView.ViewHolder {
public MyViewHolder(@NonNull View itemView) {
super(itemView);
itemview = itemView;
getView(itemView);
}
}
public <T extends View> T bind(int id) {
return itemview.findViewById(id);
}
}
public class Adapter extends BaseAdapter {
TextView tv;
Adapter(Context context, ArrayList<String> arrayList){
super(context);
dataList=arrayList;
layout_id=R.layout.content_main2;
}
@Override
public View getView(View view) {
tv = bind(R.id.tv);
return view;
}
@Override
public void onBindViewHold( final int position, Object itemView) {
String text=(String) itemView;
Log.e("tv",tv.toString());
tv.setText(text);
tv.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(BASE_CONTEXT, ""+position, Toast.LENGTH_SHORT).show();
}
});
}
}
You can refer this sample adapter class and edit it as per your requirement:您可以参考此示例适配器类并根据您的要求对其进行编辑:
public class absadapter extends RecyclerView.Adapter<absadapter.exViewHolder> {
List<abs.Ex> exList;
Context context;
absadapter(List exList) {
this.exList= exList;
}
public static class exViewHolder extends RecyclerView.ViewHolder{
CardView cardView;
TextView exname;
ImageView exlogo;
exViewHolder(View itemView){
super(itemView);
cardView= itemView.findViewById(R.id.cardView);
exname= itemView.findViewById(R.id.ex_name);
exlogo=itemView.findViewById(R.id.exlogo);
}
}
@Override
public absadapter.exViewHolder onCreateViewHolder(ViewGroup parent, int viewType){
View viewthigh= LayoutInflater.from(parent.getContext()).inflate(R.layout.custom_abslayout,parent,false);
absadapter.exViewHolder evh=new absadapter.exViewHolder(viewthigh);
return evh;
}
@Override
public void onBindViewHolder(final absadapter.exViewHolder holder, final int position){
holder.exname.setText(exList.get(position).name);
holder.exlogo.setImageResource(exList.get(position).logoId);
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (position == 0 ){
v.getContext().startActivity(new Intent(v.getContext(), abdetails.class));
}
if (position == 1) {
v.getContext().startActivity(new Intent(v.getContext(), declinecrunch.class));
}
if (position == 2) {
v.getContext().startActivity(new Intent(v.getContext(), dumsidebend.class));
}
}
});
}
@Override
public void onAttachedToRecyclerView(RecyclerView recyclerView){
super.onAttachedToRecyclerView(recyclerView);
}
@Override
public int getItemCount() {
return exList.size();
}
Refer this for Main Class:请参阅主类:
public class abs extends AppCompatActivity {
RecyclerView recyclerView;
Context context;
private List<Ex> exlist;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_abs);
recyclerView= findViewById(R.id.recyclerView);
recyclerView.setHasFixedSize(true);
LinearLayoutManager layoutManager=new LinearLayoutManager(context);
recyclerView.setLayoutManager(layoutManager);
initializeData();
initializeAdapter();
}
private void initializeData(){
exlist=new ArrayList<>();
exlist.add(new abs.Ex("Crunches",R.drawable.crunchesgif));
exlist.add(new abs.Ex("Decline Crunch",R.drawable.declinecrunch));
exlist.add(new abs.Ex("Dumbell Side Bends",R.drawable.dumbbellsidebend));
exlist.add(new abs.Ex("Hanging Leg Raises",R.drawable.hanginglegraises));
exlist.add(new abs.Ex("Incline Leg Raises",R.drawable.inclinelegraises));
exlist.add(new abs.Ex("Kneeling Cable Crunch",R.drawable.cablecrunch));
exlist.add(new abs.Ex("Legs Raises",R.drawable.legraises));
exlist.add(new abs.Ex("Flat Bench Lying Leg Raises",R.drawable.flatbenchlyinglegraise));
exlist.add(new abs.Ex("Seated Jack Knife",R.drawable.seatedjackknife));
exlist.add(new abs.Ex("Twisting Hip Raise",R.drawable.twistinghipraise));
exlist.add(new abs.Ex("Weighted Crunch",R.drawable.weightedcrunch));
exlist.add(new abs.Ex("Plank",R.drawable.plank));
exlist.add(new abs.Ex("Side Plank",R.drawable.sideplank));
exlist.add(new abs.Ex("Superman",R.drawable.superman));
exlist.add(new abs.Ex("Twist Crunch",R.drawable.twistcrunch));
}
public void initializeAdapter(){
absadapter rvadapter=new absadapter(exlist);
recyclerView.setAdapter(rvadapter);
}
class Ex{
String name;
int logoId;
Ex(String name,int logoId){
this.name=name;
this.logoId=logoId;
}
}
overriding the method which handles click events in sub-classes of "BaseAdapters" should do it( based on your comments on other posts i assume bindView() handles click events; override whichever method you know handles click events):覆盖处理“BaseAdapters”子类中的点击事件的方法应该这样做(根据您对其他帖子的评论,我假设 bindView() 处理点击事件;覆盖您知道处理点击事件的任何方法):
class new_adapter extends BaseAdapters{
//...
@Override
public MyViewHolder bindView(MyViewHolder holder, int position){
//you could alter how click events are handled here.
}
//...
}
There can be many ways, one of them is, you can use Java Generics .可以有很多方法,其中之一是,您可以使用Java 泛型。
Set click in your onCreateViewHolder
, set click and pass your list item of clicked row, or anything you need.在您的onCreateViewHolder
中设置点击,设置点击并传递您点击行的列表项,或您需要的任何内容。 You can customize method onClickViews
if you need position or anyother field.如果您需要位置或任何其他字段,您可以自定义onClickViews
方法。
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int position) {
..
itemView.setOnClickListener(v -> onClickViews(itemView, dataList.get(position)));
..
}
and和
public abstract void onClickViews(View view, T object);
Use like使用喜欢
public class SampleAdapter extends BaseAdapters<Item> {
@Override
public int getRowLayout() {
return R.layout.row;
}
@Override
public void onClickViews(View view, Item object) {
// row clicked
}
}
I edited your class a bit.我编辑了你的课程。
public abstract class BaseAdapters<T> extends RecyclerView.Adapter<BaseAdapters.MyViewHolder> {
protected List<T> dataList = new ArrayList<>();
public class MyViewHolder extends RecyclerView.ViewHolder {
MyViewHolder(View view) {
super(view);
declareViews(view, this);
}
}
@Override
public void onBindViewHolder(@NonNull MyViewHolder holder, int i) {
bindView(holder, i);
}
public void notifyList(List<T> filteredNames) {
dataList = filteredNames;
notifyDataSetChanged();
}
@Override
public int getItemCount() {
return dataList.size();
}
@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int position) {
View itemView = LayoutInflater.from(parent.getContext()).inflate(getRowLayout(), parent, false);
itemView.setOnClickListener(v -> onClickViews(itemView, dataList.get(position)));
return new MyViewHolder(itemView);
}
public abstract @LayoutRes
int getRowLayout();
public abstract MyViewHolder bindView(MyViewHolder holder, int position);
public abstract void onClickViews(View view, T object);
public abstract void declareViews(View view, MyViewHolder holder);
}
This is extend version of rupali
answer, i found recycle issue on recycle-view viewholder
while scrolling on items.这是rupali
答案的扩展版本,我在滚动项目时在recycle-view viewholder
上发现了回收问题。 so if needed you can use below one,所以如果需要,你可以使用下面的一个,
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import java.util.ArrayList;
import java.util.List;
public abstract class BaseRecyclerViewAdapter extends RecyclerView.Adapter<BaseRecyclerViewAdapter.BaseViewHolder> {
public int layout_id;
protected List<?> dataList = new ArrayList<>();
protected BaseActivity Context;
public BaseRecyclerViewAdapter(BaseActivity context) {
this.Context = context;
}
@NonNull
@Override
public BaseViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(layout_id, viewGroup, false);
return new BaseViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull BaseViewHolder viewHolder, int position) {
onViewHolderBind(viewHolder,position, dataList.get(position));
}
@Override
public int getItemCount() {
return dataList.size();
}
public abstract void onViewHolderBind(BaseViewHolder viewHolder, int position, Object data);
public class BaseViewHolder extends RecyclerView.ViewHolder {
public BaseViewHolder(@NonNull View itemView) {
super(itemView);
}
}
}
Uses用途
public class LicenseListAdapter extends BaseRecyclerViewAdapter {
public LicenseListAdapter(BaseActivity appLicensePlanActivity, List<LicenseRatePlanResponse> licenseRatePlanResponseData) {
super(appLicensePlanActivity);
dataList = licenseRatePlanResponseData;
layout_id = R.layout.item_list_license_plan;
}
@Override
public void onViewHolderBind(BaseViewHolder viewHolder, int position, Object data) {
Button btnBuyButtonOfLicencePlaneILLP;
TextView lblAmountOfLicencePlaneILLP, lblDayOfLicencePlaneILLP;
lblAmountOfLicencePlaneILLP = viewHolder.itemView.findViewById(R.id.lblAmountOfLicencePlaneILLP);
lblDayOfLicencePlaneILLP = viewHolder.itemView.findViewById(R.id.lblDayOfLicencePlaneILLP);
btnBuyButtonOfLicencePlaneILLP = viewHolder.itemView.findViewById(R.id.btnBuyButtonOfLicencePlaneILLP);
final LicenseRatePlanResponse tempLicensePlan = (LicenseRatePlanResponse) data;
lblAmountOfLicencePlaneILLP.setText(KSUtility.GetFloatWithOutPrecesion(tempLicensePlan.getAmount()).toString() +" only");
lblDayOfLicencePlaneILLP.setText(tempLicensePlan.getValidityDays().toString() +" days");
btnBuyButtonOfLicencePlaneILLP.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
PaymentHelper.OpenPaymentDialog(Context, TransactionType.LicenseRenew, tempLicensePlan.getAmount(),tempLicensePlan.getLicenseRatePlanId());
}
});
}
}
The Base Recycler Adapter will be like this Base Recycler Adapter 将是这样的
public class BaseRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private final int BOTTOM_VIEW_TYPE = 3;
private List<Object> listModels;
private Context mContext;
private OnItemClickListener onClickListener = null;
public BaseRecyclerViewAdapter(Context context) {
this.mContext = context;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view;
switch (viewType) {
case BOTTOM_VIEW_TYPE:
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.rv_bottomview_type, parent, false);
return new ChildViewHolder(view);
}
return null;
}
@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
final Object model = listModels.get(position);
if (model != null && model.getId() > 0) {
((BaseViewHolder) holder).bind(model, position);
} else if (model != null) {
((TopViewViewHolder) holder).bind(model, position);
}
}
@Override
public int getItemViewType(int position) {
if (listModels.get(position).getId() > 0) {
return BASE_VIEW_TYPE;
} else {
return TOP_VIEW_TYPE;
}
}
@Override
public int getItemCount() {
return null == listModels ? 0 : listModels.size();
}
public void setOnItemClickListener(OnItemClickListener onItemClickListener) {
this.onClickListener = onItemClickListener;
}
private class ChildViewHolder extends RecyclerView.ViewHolder {
TextView tv_bottomName;
BottomViewHolder(View v) {
super(v);
tv_bottomName = v.findViewById(R.id.tv_bottomName);
}
void bind(Object object, final int position) {
tv_bottomName.setOnClickListener(view -> onClickListener.onItemClick(object, tv_bottomName, position));
}
}
} }
And use a Custom interface for OnItemClickListner并为 OnItemClickListner 使用自定义接口
public interface OnItemClickListener {
void onItemClick(Object object, View view, int position);}
And Implement the listner in activity or fragment并在活动或片段中实现监听器
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