Question

这是我的带适配器的主班

 ListView listView;
 Bean bean;
 ArrayList<Bean> arrayList;
 ArrayAdapter<Bean> arrayAdapter;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    listView = (ListView) findViewById(R.id.list_item);
    arrayList = new ArrayList<>();
    bean= new Bean("demo");
   arrayList.add(bean);
   arrayAdapter= new ArrayAdapter<>(this,android.R.layout.simple_list_item_1,arrayList);
    listView.setAdapter(arrayAdapter); }

这是我的Bean类

  public class Bean {

     String name;


     public String getName() {
         return name;
     }

     public void setName(String name) {
         this.name = name;
     }

     public Bean(String name)
     {
        this.name=name;
     }
}

列表在我的应用程序中显示如下：

请帮助我解决此问题的过程很费时间，但仍然是相同的错误

Answer 1

为您的Bean类覆盖toString方法。

Answer 2

要完全自定义显示数据的方式，可以覆盖ArrayAdapter定义来创建数据。

自定义布局：item_bean.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="horizontal" >
    <!-- Here, you can display index for example -->
    <TextView
      android:id="@+id/tvIndex"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:style="@style/styleIndex" />
    <TextView
      android:id="@+id/tvName"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:style="@style/styleName" /> <!-- You can use your own style -->
</LinearLayout>

自定义适配器：BeansAdapter

public class BeansAdapter extends ArrayAdapter<Bean> {
    public UsersAdapter(Context context, ArrayList<Bean> beans) {
       super(context, 0, beans);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
       // Get the data item for this position
       Bean bean = getItem(position);    
       // Check if an existing view is being reused, otherwise inflate the view
       if (convertView == null) {
          convertView = LayoutInflater.from(getContext()).inflate(R.layout.item_bean, parent, false);
       }
       // Lookup view for data population
       TextView tvIndex = (TextView) convertView.findViewById(R.id.tvIndex);
       TextView tvName = (TextView) convertView.findViewById(R.id.tvName);
       // Populate the data into the template view using the data object
       tvIndex.setText(position);
       tvName.setText(bean.getName());
       // Return the completed view to render on screen
       return convertView;
   }
}

我的阵列列表数据未显示在列表视图中，而只是包装名称显示在列表视图中

2 个答案: