如何在焦点和单击时更改 ListView 项目的颜色 [英] How to change color of ListView items on focus and on click
问题描述
我的应用中有一个列表视图(这是 xml 布局):
i have a list View in my app (this is the xml layout):
<?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>
我的列表视图的每一项都由两个 TextView 组成:
Each item of my list View is composed of two TextView:
<?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>
我正在通过 ArrayAdapter 填充我的 listView,方式如下:
I'm populating my listView from an ArrayAdapter, in this way:
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视图时更改这些子视图的文本颜色和背景.
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.
我该怎么做?
推荐答案
当父行被选中时,你的列表行中的子视图应该被认为是选中的,所以你应该能够设置一个正常状态的 drawable/color-列出您要更改的视图,无需杂乱的 Java 代码.请参阅这篇SO帖子.
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.
具体来说,您可以将 textViews 的 textColor
设置为这样的 XML 资源:
Specifically, you'd set the textColor
of your textViews to an XML resource like this one:
<?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>
这篇关于如何在焦点和单击时更改 ListView 项目的颜色的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!