为列表视图中的每个元素设置不同的分隔线颜色 [英] Setting different divider color to each element in list view

问题描述

我想要一个列表，列表元素之间有不同的分隔线.我用这段代码定义了一个高度为 1 的白色分隔线:

I want to have a list with different dividers between the list elements. I have used this code to define a white divider with height 1:

_listView.setDivider(new ColorDrawable(Color.WHITE));
_listView.setDividerHeight(1);

然而，它将所有元素的分隔线设置为白色，我只希望其中一些元素为白色，而其他元素为不同颜色.

However it sets the divider for all the element to be white, and I want only some of them to be white and the other in different color.

我该怎么做?

推荐答案

将分隔线设置为高度为 0 并在您的项目布局中实现一个高度为 1 的视图，并在每次视图时根据列表项更改其颜色已建成.

Set the divider to height to 0 and implement a View in your item layout with the height of 1 and change its color based on the list item every time the view is built.

这是一个 XML 布局示例:

Here's an XML layout sample:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical" >

    <TextView 
        android:id="@+id/text"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" />

    <View 
        android:id="@+id/divider"
    android:layout_width="fill_parent"
    android:layout_height="1dp"
    android:background="#FFFFFFFF" />

</LinearLayout>

这就是您在适配器中更改颜色的方式:

And this is how you change the color in the adapter:

public class MyAdapter extends BaseAdapter {
    /** List of items to show */
    private ArrayList<String> items = new ArrayList<String>();
    private Context context;
    private int color[];

    public OffersAdapter(Context c, ArrayList<String> items, int color[])
    {
        super();
        this.context = c;
        this.items = items;
        this.color = color;
    }

    public int getCount() {
        return items.size();
    }

    public Object getItem(int position) {
        return null;
    }

    public long getItemId(int position) {
        return 0;
    }

public View getView(final int position, View convertView, ViewGroup parent) {
    final ViewHolder viewHolder;

    if(null == convertView)
    {
        LayoutInflater inflater = LayoutInflater.from(context);
        convertView = inflater.inflate(R.layout.list_item, parent, false);

        viewHolder.text = (TextView) convertView.findViewById(R.id.text);
        viewHolder.divider = (View) convertView.findViewById(R.id.divider);

        convertView.setTag(viewHolder);
    } else {
        //Retrieve the current view
        viewHolder = (ViewHolder) convertView.getTag(); 
    }

    //This is where you chance the divider color based on the item  
    viewHolder.divider.setBackgroundColor(color[position]);

  viewHolder.text.setText(items.get(position));

    return convertView;
}

//Holds the current view
 private static class ViewHolder {
         public TextView text;
         public View divider;
     }   
}

其中 int color[] 是您要使用的颜色列表.

Where int color[] is a list of the colors you want to use.

更多关于ViewHolder 在这里阅读.

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