如何在焦点和单击上更改ListView项目的颜色

i have a list View in my app (this is the xml layout):

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>

Each item of my list View is composed of two TextView:

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>

I'm populating my listView from an ArrayAdapter, in this way:

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);

My goal is to be able to change the text color and the backgorund of these child views whenever the parent is selected or pressed.

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。

How can i do it?

我该怎么做?

7 个解决方案

#1

The child views in your list row should be considered selected whenever the parent row is selected, so you should be able to just set a normal state drawable/color-list on the views you want to change, no messy Java code necessary. See this SO post.

每当选择父行时,应该考虑选择列表行中的子视图,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。

Specifically, you'd set the textColor of your textViews to an XML resource like this one:

具体来说,您将textViews的textColor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> 

#2

In your main.xml include the following in your ListView:

在main.xml中,在ListView中包含以下内容:

android:drawSelectorOnTop="false"

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

#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>

#4

Here's a good article on how to use selectors with lists.

这是一篇关于如何将选择器与列表一起使用的好文章。

Instead of setting it to be the android:background of the ListView, I believe you want to set android:listSelector as shown below:

而不是将它设置为ListView的android:background,我相信你想设置android:listSelector,如下所示:

<ListView android:id="@+id/list" 
  android:layout_width="fill_parent"
  android:layout_height="wrap_content" 
  android:layout_gravity="center"
  android:divider="@null" 
  android:dividerHeight="0dip"
  android:listSelector="@drawable/list_selector" />

#5

listview.setOnItemLongClickListener(new OnItemLongClickListener() {

        @Override
        public boolean onItemLongClick(final AdapterView<?> parent, View view,
                final int position, long id) {
            // TODO Auto-generated method stub

             parent.getChildAt(position).setBackgroundColor(getResources().getColor(R.color.listlongclick_selection));

            return false;
        }
    });

#6

Very old but I have just struggled with this, this is how I solved it in pure xml. In res/values/colors.xml I added three colours (the colour_...);

很老,但我刚刚挣扎于此,这就是我在纯xml中解决它的方法。在res / values / colors.xml中我添加了三种颜色(颜色_...);

<resources>

    <color name="black_overlay">#66000000</color>

    <color name="colour_highlight_grey">#ff666666</color>
    <color name="colour_dark_blue">#ff000066</color>
    <color name="colour_dark_green">#ff006600</color>

</resources>

In the res/drawable folder I created listview_colours.xml which contained;

在res / drawable文件夹中我创建了包含的listview_colours.xml;

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@color/colour_highlight_grey" android:state_pressed="true"/>
    <item android:drawable="@color/colour_dark_blue" android:state_selected="true"/>
    <item android:drawable="@color/colour_dark_green" android:state_activated="true"/>
    <item android:drawable="@color/colour_dark_blue" android:state_focused="true"/>
</selector>

In the main_activity.xml find the List View and add the drawable to listSelector;

在main_activity.xml中找到List View并将drawable添加到listSelector;

<ListView
    android:id="@+id/menuList"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:listSelector="@drawable/listview_colours"
    android:background="#ff222222"/>
</LinearLayout>

Play with the state_... items in the listview_colours.xml to get the effect you want.

使用listview_colours.xml中的状态_...项目来获得所需的效果。

There is also a method where you can set the style of the List View but I never managed to get it to work

还有一种方法可以设置列表视图的样式,但我从未设法让它工作

#7

Declare list item components as final outside your setOnClickListener or whatever you want to apply on your list item like this:

将列表项组件声明为setOnClickListener之外的final或您要在列表项上应用的任何内容,如下所示:

final View yourView;
final TextView yourTextView;

And in overriding onClick or whatever method you use, just set colors as needed like this:

在覆盖onClick或您使用的任何方法时,只需根据需要设置颜色,如下所示:

yourView.setBackgroundColor(Color.WHITE/*or whatever RGB suites good contrast*/);
yourTextView.setTextColor(Color.BLACK/*or whatever RGB suites good contrast*/);

Or without the final declaration, if let's say you implement an onClick() for a custom adapter to populate a list, this is what I used in getView() for my setOnClickListener/onClick():

或者没有最后的声明,如果让我们说你为自定义适配器实现一个onClick()来填充列表,这就是我在setOnClickListener / onClick()的getView()中使用的:

//reset color for all list items in case any item was previously selected
for(int i = 0; i < parent.getChildCount(); i++)
{
  parent.getChildAt(i).setBackgroundColor(Color.BLACK);
  TextView text=(TextView) parent.getChildAt(i).findViewById(R.id.item);
  text.setTextColor(Color.rgb(0,178,178));
}
//highlight currently selected item
 parent.getChildAt(position).setBackgroundColor(Color.rgb(0,178,178));
 TextView text=(TextView) parent.getChildAt(position).findViewById(R.id.item);
 text.setTextColor(Color.rgb(0,178,178));