从适配器访问片段

Posted 2023-04-15

【中文标题】从适配器访问片段

【英文标题】：Access fragment from adapter

【发布时间】：2014-08-13 20:45:20

【问题描述】：

我的想法是我有一个列表视图，其中每个项目都是一个产品，当我单击该项目时，我需要从列表视图适配器内部的单击转到另一个片段。

我的适配器是：

package info.android.adapter;

import info.android.ProductFragment;
import info.android.R;

import java.util.ArrayList;

import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentTransaction;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class ProductOffersListAdapter extends BaseAdapter 

    private Context context;
    private ArrayList<info.android.model.ProductsOffers> navProOffers;

    public ProductOffersListAdapter(Context context, ArrayList<info.android.model.ProductsOffers> navProOffers) 
        this.context = context;
        this.navProOffers = navProOffers;
    

    @Override
    public int getCount() 
        return navProOffers.size();     
    

    @Override
    public info.android.model.ProductsOffers getItem(int position)         
        return navProOffers.get(position);
    

    @Override
    public long getItemId(int position) 
        return position;
    

    @Override
    public View getView(int position, View convertView, ViewGroup parent) 
        if (convertView == null) 
            LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
            convertView = mInflater.inflate(R.layout.fragment_row, null);
        

        convertView.setOnClickListener(new OnClickListener() 
              @Override
              public void onClick(View v) 
                          // I NEED CLALL HERE FRAGMENT_PRODUCT.XML                             
              
            );

        ImageView img = (ImageView) convertView.findViewById(R.id.image); 

        TextView txtCodigo = (TextView) convertView.findViewById(R.id.txtCodigo);
        TextView txtCiudad = (TextView) convertView.findViewById(R.id.txtCiudad);               
        TextView txtVF = (TextView) convertView.findViewById(R.id.txtVF);

        String sVF =  Double.toString(getItem(position).ValorFinal) + "€";  

        txtVF.setText(sVF);
        txtCiudad.setText(getItem(position).ciudad);
        txtCodigo.setText(getItem(position).codigo);

        convertView.setTag(getItem(position).codigo);

        img.setImageBitmap(getItem(position).Imagen);

        return convertView;
    

你必须假设所有代码都在工作。

如何进入适配器内部的产品片段？

【参考方案1】：

您需要在构造函数中传递它。 例如：

public class ProductOffersListAdapter extends BaseAdapter

 private Context context;
 private ArrayList<info.android.model.ProductsOffers> navProOffers;
 Fragment myFragment;

 public ProductOffersListAdapter(Context context, ArrayList<info.android.model.ProductsOffers> navProOffers, Fragment myFragment) 
 
    this.context = context;
    this.myFragment = myFragment;
    this.navProOffers = navProOffers;
 

...

【讨论】：

还有...如何在点击事件中显示片段？

【参考方案2】：

我解决这个问题的方法是：

Intent i = new Intent(v.getContext(), MainActivity.class);                      
i.putExtra("fragment_value", "2");
v.getContext().startActivity(i);

在主类中，我将参数作为值，并通过开关在我感兴趣的主类中设置片段。

【参考方案3】：

public class ProductOffersListAdapter extends BaseAdapter 

    private Context context;
    private ArrayList<info.android.model.ProductsOffers> navProOffers;

    public ProductOffersListAdapter(Context context, ArrayList<info.android.model.ProductsOffers> navProOffers) 
        this.context = context;
        this.navProOffers = navProOffers;
    

    @Override
    public int getCount() 
        return navProOffers.size();     
    

    @Override
    public info.android.model.ProductsOffers getItem(int position)         
        return navProOffers.get(position);
    

    @Override
    public long getItemId(int position) 
        return position;
    

    @Override
    public View getView(int position, View convertView, ViewGroup parent) 
        if (convertView == null) 
            LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
            convertView = mInflater.inflate(R.layout.fragment_row, null);
        

        convertView.setOnClickListener(new OnClickListener() 
              @Override
              public void onClick(View v) 
                          // I NEED CLALL HERE FRAGMENT_PRODUCT.XML   
             // TO call fragment  use this 
          AppCompatActivity appCompatActivity = (AppCompatActivity) v.getcontext();
    FragmentManager fragmentManager = appCompatActivity.getSupportFragmentManager();
    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
    fragmentTransaction.replace(frameLayout.getId(),fragment);
        fragmentTransaction.commit();



                          
              
            );

        ImageView img = (ImageView) convertView.findViewById(R.id.image); 

        TextView txtCodigo = (TextView) convertView.findViewById(R.id.txtCodigo);
        TextView txtCiudad = (TextView) convertView.findViewById(R.id.txtCiudad);               
        TextView txtVF = (TextView) convertView.findViewById(R.id.txtVF);

        String sVF =  Double.toString(getItem(position).ValorFinal) + "€";  

        txtVF.setText(sVF);
        txtCiudad.setText(getItem(position).ciudad);
        txtCodigo.setText(getItem(position).codigo);

        convertView.setTag(getItem(position).codigo);

        img.setImageBitmap(getItem(position).Imagen);

        return convertView;