我们如何在android中的fragment类中找到适配器类的项？

本文介绍了我们如何在android中的fragment类中找到适配器类的项？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 package com.example.aaa.maaqualatnew.adapter;import android.content.Context;import android.database.Cursor;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.Button;import android.widget.ImageView;import android.widget.TextView;import android.widget.Toast;import com.android.volley.AuthFailureError;import com.android.volley.Request;import com.android.volley.RequestQueue;import com.android.volley.Response;import com.android.volley.VolleyError;import com.android.volley.toolbox.StringRequest;import com.android.volley.toolbox.Volley;import com.bumptech.glide.Glide;import com.example.aaa.maaqualatnew.Global.GlobalData;import com.example.aaa.maaqualatnew.R;import com.example.aaa.maaqualatnew.databasehandler.DataBaseHandler;import com.example.aaa.maaqualatnew.extra.GeneralUtilities;import com.example.aaa.maaqualatnew.fragment.CategoryFragment;import com.example.aaa.maaqualatnew.model.PojoCategory;import org.json.JSONArray;import org.json.JSONException;import org.json.JSONObject;import java.util.ArrayList;import java.util.HashMap;import java.util.Map;public class CategoryAdapter extends BaseAdapter { private ArrayList<PojoCategory> mList; private Context mContext; private ViewHolder viewHolder; private DataBaseHandler dbh; public CategoryAdapter(Context mContext, ArrayList<PojoCategory> mList) { this.mContext = mContext; this.mList = mList; dbh = new DataBaseHandler(mContext); } @Override public int getCount() { if (mList != null) { return mList.size(); } return 0; } @Override public Object getItem(int position) { return mList.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(final int position, View view, ViewGroup parent) { LayoutInflater layoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); if (view == null) { view = layoutInflater.inflate(R.layout.category, parent, false); viewHolder = new ViewHolder(); viewHolder.Dish_name = (TextView) view.findViewById(R.id.nameofdish); viewHolder.dish_description = (TextView) view.findViewById(R.id.dishdescription); viewHolder.Dish_rate = (TextView) view.findViewById(R.id.rateofdish); viewHolder.item_image = (ImageView) view.findViewById(R.id.img_item); // viewHolder.btnAddCart = (Button) view.findViewById(R.id.btn_add_cart); viewHolder.tv_Number = (TextView) view.findViewById(R.id.tv_add_sub); viewHolder.mBtnAdd = (Button) view.findViewById(R.id.btn_add); viewHolder.mBtnMinus = (Button) view.findViewById(R.id.btn_sub); } else { viewHolder = (ViewHolder) view.getTag(); } view.setTag(viewHolder); final PojoCategory pojoCategory = (PojoCategory) getItem(position); viewHolder.Dish_name.setText(pojoCategory.getDish_name()); viewHolder.dish_description.setText(pojoCategory.getdish_description()); viewHolder.Dish_rate.setText(pojoCategory.getDish_rate()); Glide.with(mContext).load(pojoCategory.getCategory_Image()).into(viewHolder.item_image); // viewHolder.btnAddCart.setTag(position); /* viewHolder.btnAddCart.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { String tag = viewHolder.btnAddCart.getTag().toString(); int position = Integer.parseInt(tag); } });*/ viewHolder.mBtnAdd.setTag(pojoCategory); viewHolder.mBtnMinus.setTag(pojoCategory); if (pojoCategory.getmQuantity() > 0) { viewHolder.tv_Number.setText("" + pojoCategory.getmQuantity()); } else { viewHolder.tv_Number.setText("" + 0); } viewHolder.mBtnAdd.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { PojoCategory pojoCategory = (PojoCategory) v.getTag(); int mValue = pojoCategory.getmQuantity(); mValue++; viewHolder.tv_Number.setText("" + mValue); pojoCategory.setmQuantity(mValue); notifyDataSetChanged(); dbh.insertData(pojoCategory.getDish_name(), pojoCategory.getDish_rate(), pojoCategory.getCategory_Image()); } }); viewHolder.mBtnMinus.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { PojoCategory pojoCategory = (PojoCategory) v.getTag(); int mValue = pojoCategory.getmQuantity(); if (mValue > 0) { mValue--; viewHolder.tv_Number.setText("" + mValue); } pojoCategory.setmQuantity(mValue); notifyDataSetChanged(); } }); return view; } class ViewHolder { TextView Dish_name, dish_description, Dish_rate, tv_Number; ImageView item_image; // Button btnAddCart; Button mBtnAdd, mBtnMinus; }} 我尝试过： i希望在片段类中找到适配器类的项目！如果有人告诉我怎么能这样做？What I have tried:i want to find the item of the adapter class in the fragment class ! if anyone tell me how can i do this ??推荐答案 你想根据连接适配器的listview位置得到适配器项目值吗？如果是，则执行以下操作： Do you want to get adapter item values based on listview position where the adapter has been attached? If yes then do like:mListView.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Object obj = mListView.getAdapter().getItem(position); String value = obj.toString(); Log.d("MyLog", "Value is: "+value); }}); 这篇关于我们如何在android中的fragment类中找到适配器类的项？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！