getSupportFragmentManager()在我的适配器类中不起作用？

Question

我试图从我当前的片段添加一个意图到另一个片段.为此我在卡片中的ImageButton上添加了一个OnclickListener.

但它不能正常工作,我在代码中找不到错误.

package com.example.kgb.homescreen.myaccount;

import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.support.v4.app.Fragment;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageButton;

import com.example.kgb.R;
import com.example.kgb.components.UpdatedTextView;

import java.util.ArrayList;


public class MyAccountsCardAdapter extends RecyclerView.Adapter<MyAccountsCardAdapter.ViewHolder> {

    private static Context context;

    public MyAccountsCardAdapter(Context context) {
        this.context=context;
    }

    private ArrayList<MyAccountsCard>cardArrayList;
    public MyAccountsCardAdapter(ArrayList<MyAccountsCard> cardData) {
        this.cardArrayList=cardData;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View itemView= LayoutInflater.from(parent.getContext()).inflate(R.layout.accounts_card_layout, parent, false);
        ImageButton imButton = (ImageButton) itemView.findViewById(R.id.shareButton);
        return new ViewHolder(itemView,imButton);
    }

    @Override
    public void onBindViewHolder(MyAccountsCardAdapter.ViewHolder holder, int position ){
        //holder.accountBalance.setTextColor(Color.parseColor("#000000"));

        Log.d("ABBB","haiii" + holder.accountType.getText());
        if(holder.accountType.getText().equals("Savings"))
        {
            holder.accountBalance.setTextColor(Color.parseColor("#000000"));
        }
        holder.accountNo.setText(cardArrayList.get(position).getAccountNo());
        holder.scheme.setText(cardArrayList.get(position).getScheme());
        holder.accountType.setText(cardArrayList.get(position).getAccountType());
        holder.accountBalance.setText(cardArrayList.get(position).getAccountBalance());
    }

    @Override
    public int getItemCount(){return cardArrayList.size();}

    public static class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

        public ImageButton iButton;
        UpdatedTextView accountNo=(UpdatedTextView) itemView.findViewById(R.id.acc_no);
        UpdatedTextView scheme=(UpdatedTextView) itemView.findViewById(R.id.acc_scheme);
        UpdatedTextView accountType=(UpdatedTextView) itemView.findViewById(R.id.acc_type);
        UpdatedTextView accountBalance=(UpdatedTextView) itemView.findViewById(R.id.acc_bal);
        public ViewHolder(View itemView, ImageButton imButton) {

            super(itemView);
            itemView.setOnClickListener(this);
            iButton = imButton;
            context = itemView.getContext();

        }

        @Override
        public void onClick(View v) {

            Fragment mFragment = new CardExpandFragment();
            context.getSupportFragmentManager().beginTransaction().replace(R.id.cardExpand, mFragment).commit();
        }
    }
}

Answer 1

最好FragmentManager从您的活动（或如果您正在使用的片段）传递给您的适配器构造函数

FragmentManager fragmentManager;
public MyAccountsCardAdapter(Context context ,ArrayList<MyAccountsCard> cardData ,FragmentManager fragmentManager) {
    this.cardArrayList=cardData;
    this.fragmentManager = fragmentManager;
}

然后打电话

Fragment mFragment = new CardExpandFragment();
fragmentManager .beginTransaction().replace(R.id.cardExpand, mFragment).commit();

Answer 2

对于那些使用kotlin的人,你可以简单地做这样的事情

val dialog = IntervModifFragment()//The fragment that u want to open for example
       val ft = (context as AppCompatActivity).supportFragmentManager.beginTransaction()
        dialog.show(ft, ContentValues.TAG)