Question

我正在尝试将当前片段的意图添加到另一个片段。为此，我在卡片中的ImageButton上添加了一个OnclickListener。

但是它不能正常工作，我无法在我的代码中找到错误。

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

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)

Answer 2

只需将您的活动传递给适配器并使用

即可

activity.getSupportFragmentManager()

但这不是个好主意。在适配器中使用Listener，并在要设置适配器的活动中调用它。

Answer 3

FragmentManager fm = new CardExpandFragmentmFragment ()
               FragmentTransaction ft = fm.beginTransaction();
               ft.replace(R.id.cardExpand, fm, "fragment_card");
               ft.commit();

Answer 4

最好将FragmentManager从您的活动传递到您的适配器构造函数（如果您正在使用，则从片段传递）

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

然后致电

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

Answer 5

使用onClick将Fragment/Activity操作移至使用adapter的相应interface。最好不要在Fragment transactions中执行adapter classes。

如你所见：

itemView.setOnClickListener(this);

此代码行表示onClickListener没有特定的image button。您设置的click listener适用于整个项目。

Answer 6

不要在ViewHolder中分配上下文值。您已经从构造函数传递了上下文值。

   public ViewHolder(View itemView, ImageButton imButton) {

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

    }

您只需要将您的上下文转换为AppcompatActivity。只需确保您正在使用AppCompatActivity而不是Activity并从Adapter的构造函数中的Activity传递Context值。不仅仅是它可以施展

    @Override
    public void onClick(View v) {

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

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

6 个答案: