在 ListView 中重复项目？它不能正常工作第一个项目显示在第 3 个位置并再次从第一个项目重复

Question

一切正常，但现在我不知道发生了什么，我有 72 个项目要显示在 listView 中，它不能正常工作第一个项目显示在第 3 个位置，其他项目再次从又是第一项??

package com.example.kishorsinh.yogaapp.Adapter;

import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import com.example.kishorsinh.yogaapp.Model.InstructionsData;
import com.example.kishorsinh.yogaapp.R;

import java.util.List;

public class InstructionsAdapter extends BaseAdapter {

    Context applicationContext;
    List<InstructionsData> iData;

    public InstructionsAdapter(Context applicationContext, List<InstructionsData> iData) {
        this.applicationContext=applicationContext;
        this.iData=iData;
    }

    @Override
    public int getCount() {
        return iData.size();
    }

    @Override
    public Object getItem(int position) {
        return iData.get(position);
    }

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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        MyViewHolder myViewHolder;
        if(convertView==null)
        {
            LayoutInflater layoutInflater=(LayoutInflater) applicationContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView=layoutInflater.inflate(R.layout.instructions_list,parent,false);
            myViewHolder=new MyViewHolder();
            myViewHolder.imageView=(ImageView) convertView.findViewById(R.id.inst_image);
            myViewHolder.textView1=(TextView) convertView.findViewById(R.id.inst_name);
            //myViewHolder.textView2=(TextView) convertView.findViewById(R.id.detail_inst);
            InstructionsData instructionsData=iData.get(position);
            myViewHolder.imageView.setImageResource(instructionsData.getImage_inst());
            myViewHolder.textView1.setText(instructionsData.getInstructionslist());
            //myViewHolder.textView2.setText(instructionsData.getInstructionslist());
            convertView.setTag(myViewHolder);
        }
        else
        {
            myViewHolder=(MyViewHolder)convertView.getTag();
        }

        return convertView;
    }

    private class MyViewHolder
    {
        ImageView imageView;
        TextView textView1;
        //TextView textView2;
    }

}

它只是重复您在下图中看到的所有列表名称...

https://i.stack.imgur.com/8MkM6.jpg

Answer 1

如你所说

its don't working fine first item display at 3rd position and other item that it repeats again from the 1st item again

您需要为每个项目无条件绑定数据，就像您仅在 converconvertView == null

时绑定数据一样

所以只删除这个

if(convertView==null)

有条件并且始终无条件绑定数据

Answer 2

您的 getView 方法逻辑错误，重复项的出现是视图重用造成的，请按照代码片段更改您的 getView 方法。

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    MyViewHolder myViewHolder;
    if(convertView==null)
    {
       LayoutInflater layoutInflater=(LayoutInflater) applicationContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
       convertView=layoutInflater.inflate(R.layout.instructions_list,parent,false);
       myViewHolder=new MyViewHolder();
       myViewHolder.imageView=(ImageView) convertView.findViewById(R.id.inst_image);
       myViewHolder.textView1=(TextView) convertView.findViewById(R.id.inst_name);
       //myViewHolder.textView2=(TextView) convertView.findViewById(R.id.detail_inst);
       convertView.setTag(myViewHolder);
    }
    else{
        myViewHolder=(MyViewHolder)convertView.getTag();
    }
    InstructionsData instructionsData=iData.get(position);
    myViewHolder.imageView.setImageResource(instructionsData.getImage_inst());
    myViewHolder.textView1.setText(instructionsData.getInstructionslist());
    //myViewHolder.textView2.setText(instructionsData.getInstructionslist());
    return convertView;
 }

在 ListView 中重复项目？它不能正常工作第一个项目显示在第 3 个位置并再次从第一个项目重复

Repeating items in ListView? its don't working fine first item display at 3rd position and repeats again from the 1st item again

android

listview

adapter

custom-adapter