如何在焦点和单击上更改ListView项目的颜色

Question

我在我的应用程序中有一个列表视图(这是xml布局):

   <?xml version="1.0" encoding="utf-8"?>
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
       android:id="@+id/arrayList"
       android:layout_width="fill_parent"
android:layout_height="fill_parent"
       android:textFilterEnabled="true"
       android:scrollbars="vertical"
       android:drawSelectorOnTop="true">
</ListView>

我的列表View中的每个项目都由两个TextView组成:

    <?xml version="1.0" encoding="utf-8"?>
<TableLayout android:layout_width="fill_parent"
       xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/row_container"
       android:padding="5px" android:layout_height="wrap_content"
       android:background="@color/white" android:shrinkColumns="0">
               <TableRow>
               <TextView android:layout_height="wrap_content"
                       android:layout_width="wrap_content" android:layout_below="@+id/
description"
                       android:id="@+id/description"
                       android:textColor="@color/black"
                       android:scrollHorizontally="true"
                       android:singleLine="true"></TextView>
       </TableRow>
       <TableRow>
               <TextView android:layout_width="wrap_content"
                       android:layout_height="wrap_content" android:id="@+id/result"
                       android:textColor="@color/grey"
                       android:maxLines="1"
                       android:scrollHorizontally="true"></TextView>
       </TableRow>

</TableLayout>

我正在以这种方式从ArrayAdapter填充我的listView:

public class Matches extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);        
    //set layout

    setContentView(R.layout.list_layout);
  // obtain reference to listview
  ListView listView = (ListView) findViewById(R.id.arrayList);

  ArrayAdapter<Match> arrayAdapter = new ArrayAdapter<Match>(
        this, R.layout.custom_row, R.id.description, createItems()) {

     @Override
     public View getView (int position, View convertView, ViewGroup parent){
        Match item = getItem (position);
        LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View rowView = inflater.inflate(R.layout.custom_row, null);
        TextView description = (TextView)rowView.findViewById(R.id.description);
        TextView result = (TextView)rowView.findViewById(R.id.result);
        description.setText(item.description + "  Risultato: " + item.result );
        result.setText(item.date + "  " + item.hour);
        return rowView;
     }
  };

  listView.setAdapter(arrayAdapter);

我的目标是能够在选择或按下父级时更改这些子视图的文本颜色和backgorund.

我该怎么做？

Answer 1

每当选择父行时,应该认为列表行中的子视图被选中,因此您应该能够在要更改的视图上设置普通状态drawable/color-list,而不需要杂乱的Java代码.看到这篇SO帖子.

具体来说,您将textColortextViews设置为XML资源,如下所示:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_focused="true" android:drawable="@color/black" /> <!-- focused -->
    <item android:state_focused="true" android:state_pressed="true" android:drawable="@color/black" /> <!-- focused and pressed-->
    <item android:state_pressed="true" android:drawable="@color/green" /> <!-- pressed -->
    <item android:drawable="@color/black" /> <!-- default -->
</selector> 

Answer 2

在main.xml中,在ListView中包含以下内容:

android:drawSelectorOnTop="false"

android:listSelector="@android:color/darker_gray"

Answer 3

<selector xmlns:android="http://schemas.android.com/apk/res/android" >    
    <item android:state_pressed="true" android:drawable="@drawable/YOUR DRAWABLE XML" /> 
    <item android:drawable="@drawable/YOUR DRAWABLE XML" />
</selector>