Java 使用自定义适配器自定义Android ListView

我正在使用自定义适配器处理列表视图，但我的代码似乎不起作用。我不知道怎么了。有人能帮我吗。以下是我所做的代码：

student_record.xml：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >

    <LinearLayout android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical"
        android:layout_above="@+id/footerlayout"
        android:id="@+id/listviewlayout">

        <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_gravity="top|start"
                android:paddingTop="10dp"
                android:paddingBottom="10dp"
                android:paddingLeft="10dp"
                android:paddingStart="10dp"
                android:paddingRight="10dp"
                android:paddingEnd="10dp"
                android:background="@drawable/header"
                android:text="@string/student_record"
                android:textSize="15sp"
                android:textColor="#ffffff" />

        <ListView
            android:id="@+id/listView1"
            android:layout_height="wrap_content"
            android:layout_width="match_parent" >
        </ListView>

    </LinearLayout>

    <LinearLayout android:id="@+id/footerlayout"
            android:layout_marginTop="3dip"
            android:layout_height="wrap_content"
            android:orientation="vertical" 
            android:layout_width="fill_parent" 
            android:gravity="center"
            android:layout_alignParentBottom="true">

            <Button
                android:id="@+id/tableOfSpecificationButton"
                android:layout_width="match_parent"
                android:layout_height="35dp"
                android:layout_marginTop="10dp"
                android:layout_marginLeft="10dp"
                android:layout_marginStart="10dp"
                android:layout_marginRight="10dp"
                android:layout_marginEnd="10dp"
                android:background="@drawable/roundedbutton"
                android:text="@string/table_of_specifications"
                android:textColor="#ffffff"
                android:textSize="15sp" />


            <Button
                android:id="@+id/itemAnalysisButton"
                android:layout_width="match_parent"
                android:layout_height="35dp"
                android:layout_marginTop="10dp"
                android:layout_marginBottom="10dp"
                android:layout_marginLeft="10dp"
                android:layout_marginStart="10dp"
                android:layout_marginRight="10dp"
                android:layout_marginEnd="10dp"
                android:background="@drawable/roundedbutton"
                android:text="@string/item_analysis"
                android:textColor="#ffffff"
                android:textSize="15sp" />

    </LinearLayout>
    </RelativeLayout>

StudentRecordCustomAdapter.java

package com.checkaidev1;

import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

public class StudentRecordCustomAdapter extends ArrayAdapter<Student> {

    Context ctx;
    int layoutResourceId;    
    Student data[] = null;
    String[] score;
    LayoutInflater inflater;

    public StudentRecordCustomAdapter(Context context, int layoutResourceId, Student data[], String[] score) {
        super(context, layoutResourceId, data);
        // TODO Auto-generated constructor stub
        this.ctx = context;
        this.layoutResourceId = layoutResourceId;
        this.data = data;
        this.score = score;
    }

     public View getView(int position, View convertView, ViewGroup parent){

         View row = convertView;
         ViewHolder holder = null;

         if(row == null)
         {
             LayoutInflater inflater = ((Activity)ctx).getLayoutInflater();
             row = inflater.inflate(layoutResourceId, parent, false);

             holder = new ViewHolder();
             holder.studentTextView = (TextView) convertView.findViewById(R.id.studentTextView);
             holder.scoreTextView = (TextView) convertView.findViewById(R.id.scoreTextView);

             row.setTag(holder);

         }

         else
         {
             holder = (ViewHolder)row.getTag();
         }

        Student student = data[position];
            holder.studentTextView.setText(student.name);
            holder.scoreTextView = (TextView) convertView.findViewById(R.id.scoreTextView);

            return row;

     }

     static class ViewHolder
        {
            TextView studentTextView;
            TextView scoreTextView;
        }

}

---

谢谢大家!

首先，您没有名为Student的模型类，即使您将它们声明为Student。用字符串替换它们。 这样写

 String student_data[] = new String[]
            {
                    new String("Ace"),
                    new String("Brian"),
                    new String("Cathy"),
                    new String("Dave"),
                    new String("Ethel")
            };
StudentRecordCustomAdapter adapter = new StudentRecordCustomAdapter(StudentRecord.this,R.layout.student_row,student_data,score);

像这样接待他们

public StudentRecordCustomAdapter(Context context, int layoutResourceId, String data[], String[] score) {
    super(context, layoutResourceId, data);
    // TODO Auto-generated constructor stub
    this.ctx = context;
    this.layoutResourceId = layoutResourceId;
    this.data = data;
    this.score = score;
}

这是错误的

String student = data[position];

您可以直接访问并将变量设置为textView。。像

holder.studentTextView.setText(data[position]);

---

检查您的代码。更改它们并重试您想要执行的操作…

我建议始终为您需要在应用程序中使用的每个自定义适配器扩展BaseAdapter。您的代码似乎很好。

将这一行重复两次holder.scoreTextView=TextView convertView.findViewByIdR.id.scoreTextView；第二，您必须执行holder.scoreTextView.setTextdata[position]

我想您还没有复制适配器类。相反，您复制了两次活动！你到底遇到了什么问题？它只是不幸地显示应用程序已经停止。你能发布错误stacktrace吗，因为没有它很难帮助你

String student = data[position];

holder.studentTextView.setText(data[position]);