Question

如何在ListView中的LinearLayout中添加Views？我想在ListView中显示一些额外的信息，我想在for循环中添加它们来处理要添加的项目。这是我目前的代码：

的活动：

<LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" >

        <android.support.v7.widget.RecyclerView
            android:id="@+id/recycler"
            android:layout_height="match_parent"
            android:layout_width="match_parent"
            android:scrollbars="vertical"
            android:layout_marginTop="0dp" />

</LinearLayout>

list_recycler：

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center_vertical"
    android:paddingRight="?android:attr/scrollbarSize">

    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="15dp"
        android:layout_marginEnd="6dp"
        android:layout_marginTop="6dp"
        android:layout_marginBottom="6dp">

        <TextView android:id="@+id/list_title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="@color/textColor"
            android:textSize="16sp"
            android:layout_alignParentLeft="true"/>

        <TextView android:id="@+id/list_title_summary"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="@color/textColor"
            android:textSize="16sp"
            android:layout_alignParentLeft="true"/>


        <!-- VIEWS SHOULD BE ADDED HERE -->
        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="vertical">

        </LinearLayout>

    </RelativeLayout>

</LinearLayout>

适配器：

public class RVAdapter extends RecyclerView.Adapter<RVAdapter.RecyclerViewHolder> {

    public static class RecyclerViewHolder extends RecyclerView.ViewHolder {

        TextView personName;
        TextView personAge;

        RecyclerViewHolder(View itemView) {
            super(itemView);
            personName = (TextView)itemView.findViewById(R.id.person_name);
            personAge = (TextView)itemView.findViewById(R.id.person_age);
        }
    }

    List<Items> list;

    public RVAdapter(List<Items> list){
        this.list = list;
    }

    @Override
    public void onAttachedToRecyclerView(RecyclerView recyclerView) {
        super.onAttachedToRecyclerView(recyclerView);
    }

    @Override
    public RecyclerViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
        View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_recycler, viewGroup, false);
        return new RecyclerViewHolder(v);
    }

    @Override
    public void onBindViewHolder(RecyclerViewHolder recyclerViewHolder, int i) {
        recyclerViewHolder.personName.setText(persons.get(i).name);
        recyclerViewHolder.personAge.setText(persons.get(i).age);
    }

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

产品：

public class Items {
    String name;
    String age;

    public Items(String name, String age) {
        this.name = name;
        this.age = age;
    }
}

如何在ListView中的LinearLayout中添加视图？不同ListView项目中的每个LinearLayout应包含不同的视图，因此它们不能相同。

我的数据如何：

ListView
    Entry1
        LinearLayout
            SubEntry1
            SubEntry2
            SubEntry3
    Entry2
        LinearLayout
            SubEntry1
            SubEntry2
            SubEntry3
    Entry3
        LinearLayout
            SubEntry1
            SubEntry2
            SubEntry3

所以Entry1..Entry3是ListViews，所有子条目应该是TextViews，通过代码添加到其对应的ListView条目中的LinearLayout

Answer 1

为布局添加id，说@+id/item_content，然后在getView中执行：

itemContent = (LinearLayout)convertView.findViewById(R.id.item_content);
itemContent.removeAllViews();
//then you can add your views to the layouts depending on each item here using 
itemContent.addView(yourView);

您不能简单地遍历ListView项并向其添加内容。这就是我们的适配器。更新数据并在数据发生更改时通知适配器。

我建议你在这种情况下使用RecyclerView。

修改

您添加的内容不是数据结构，而是您的布局结构。无论如何，你应该有这个。

public class RowItem { private final String title; private final String desc; private ArrayList<String> contents; }

然后你会这样做;

itemContent = (LinearLayout)convertView.findViewById(R.id.item_content); itemContent.removeAllViews(); //then you can add your views to the layouts depending on each item here using for(String item : rowItem.getContents()){ TextView textView = new TextView(parent.getContext()); textView.setText(item); itemContent.addView(textView); }

阅读RecyclerView和ExpandableListView

Android在ListView中添加视图

1 个答案: