Android从String Array中设置listItem背景颜色

Question

有谁知道如何以编程方式从字符串数组中设置列表项的背景？我有两个字符串数组，一个是文本视图的标题，另一个是颜色引用。我已经将标题数组添加到数组适配器并显示但现在我想更改数组中每个项目的背景颜色

继承我的布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="50dp"
      >

    <TextView
        android:id="@android:id/text1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_marginTop="10dp"
        android:layout_marginLeft="18dp"
        android:text="Large Text"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:gravity="center" />

</RelativeLayout> 

到目前为止我的代码

     ListView menuList = (ListView) findViewById(R.id.listView1);
        String[] items = {"menuItem1","menuItem2","menuItem3","menuItem4","menuItem4","menuItem5","menuItem6","menuItem7","menuItem8"};  
  String[] colors = {"#ffffff","#000000","#ffffBB","#ffffDD","#ff654d","#ffffff","#ffffff","#ffffff","#ffffff"};   
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.drawer_list_item, android.R.id.text1, items);
        menuList.setAdapter(adapter);

Answer 1

使用自定义适配器，如下所示：

public class MyAdapter extends ArrayAdapter<String> {

    Context context; 
    int layoutResourceId;    
    String data[] = null;
    String color[] = null;

    public MyAdapter(Context context, int layoutResourceId, String[] data, String[] color) {
        super(context, layoutResourceId, data);
        this.layoutResourceId = layoutResourceId;
        this.context = context;
        this.data = data;
        this.color = color;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View row = convertView;
        StringHolder holder = null;

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

            holder = new StringHolder();
            holder.txtTitle = (TextView)row.findViewById(R.id.text1);

            row.setTag(holder);
        }
        else
        {
            holder = (StringHolder)row.getTag();
        }

        holder.txtTitle.setText(data[position]);
        row.setBackgroundColor(Color.parseColor(color[position]));

        return row;
    }

    static class StringHolder
    {
        TextView txtTitle;
    }
}

然后按如下方式设置listView的适配器：

ArrayAdapter<String> adapter = new MyAdapter(this, R.layout.drawer_list_item, items, colors);
menuList.setAdapter(adapter);

更新刚刚注意到：您还需要更新布局文件。它似乎错误地定义了textview的id。

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:tools="http://schemas.android.com/tools"
                android:layout_width="match_parent"
                android:layout_height="50dp"
        >

    <TextView
            android:id="@+id/text1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_marginTop="10dp"
            android:layout_marginLeft="18dp"
            android:text="Large Text"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:gravity="center" />

</RelativeLayout> 

结果如下：

Answer 2

这就是我为2种颜色所做的。

我在color.xml中保留了2个颜色的字符串，并且我已经在listview的自定义适配器中使用它

if (position % 2 == 0)

            convertView.setBackgroundResource(R.color.color1);
        else
            convertView.setBackgroundResource(R.color.color2);

Answer 3

您可以使用自定义数组适配器。扩展ArrayAdapter并覆盖getView以根据参数position返回带背景颜色的文本视图。