自定义适配器,选中项背景 [英] Custom adapter, selected item background
问题描述
自定义适配器视图有问题.我尝试在 Click
事件上更改 view
的背景.我有 AdapterView.OnItemClickListener
,在那里我得到选定的项目,并调用 myListView.invalidate();
失效后,调用适配器getView(...)
.这里的代码:
@覆盖public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;ProjectAdapterData projectItem;如果(行==空){LayoutInflater inflater = LayoutInflater.from(context);row = inflater.inflate(R.layout.project_small_item_layout, null);ProjectAdapterData projectAdapterData = new ProjectAdapterData();row.setTag(projectAdapterData);name = (TextView)row.findViewById(R.id.txtObjectName);if (objectData[position].Name!= null)name.setText(objectData[位置].Name);地址 = (TextView)row.findViewById(R.id.txtObjectAdress);if (objectData[position].Adress != null)地址.setText(objectData[位置].地址);}别的 {background = (RelativeLayout)row.findViewById(R.id.rlProjectBackground);if (objectData[position].isSelected)background.setBackgroundColor(context.getResources().getColor(R.color.cProjectSelected));别的background.setBackgroundResource(R.color.cProjectUnSelected);//这是调用,但没有结果row.invalidate();}返回行;}
我的问题,为什么背景没有改变?
我的选择器列表
<item android:state_selected="true"android:color="@color/cProjectSelected"/><item android:state_selected="false"android:color="@color/cProjectUnSelected"/></选择器>
你可以使用选择器来突出显示项目
在drawable文件夹中创建一个xml文件
list_selector.xml
并在 xml 中为您的列表视图设置 listSelector,例如
android:listSelector="@drawable/list_selector"
颜色.xml
对于 custom_list_item 布局应该是
</LinearLayout>
<块引用>
并且您的应用程序的最低版本应该是 11
I have a problem whith custom adapter view.
I try, change background of view
on Click
event.
I have AdapterView.OnItemClickListener
, where i get selected item, and calling myListView.invalidate();
After invalidate, calling adapters getView(...)
. Here code for this:
@Override public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
ProjectAdapterData projectItem;
if (row == null) {
LayoutInflater inflater = LayoutInflater.from(context);
row = inflater.inflate(R.layout.project_small_item_layout, null);
ProjectAdapterData projectAdapterData = new ProjectAdapterData();
row.setTag(projectAdapterData);
name = (TextView)row.findViewById(R.id.txtObjectName);
if (objectData[position].Name!= null)
name.setText(objectData[position].Name);
adress = (TextView)row.findViewById(R.id.txtObjectAdress);
if (objectData[position].Adress != null)
adress.setText(objectData[position].Adress);
}
else {
background = (RelativeLayout)row.findViewById(R.id.rlProjectBackground);
if (objectData[position].isSelected)
background.setBackgroundColor(context.getResources().getColor(R.color.cProjectSelected));
else
background.setBackgroundResource(R.color.cProjectUnSelected); //it's calls, but no result
row.invalidate();
}
return row;
}
My question, why background doesn't change?
My selector_list
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_selected="true"
android:color="@color/cProjectSelected"/>
<item android:state_selected="false"
android:color="@color/cProjectUnSelected"/>
</selector>
you can use selector to highlight item
In drawable folder create a xml file
list_selector.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" android:exitFadeDuration="@android:integer/config_mediumAnimTime">
<item android:drawable="@color/blue" android:state_activated="true"/>
<item android:drawable="@color/blue" android:state_selected="true"/>
<item android:drawable="@color/transparent"/>
</selector>
and set listSelector in xml for your listview like
android:listSelector="@drawable/list_selector"
color.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="BLACK">#000000</color>
<color name="WHITE">#FFFFFF</color>
<color name="light_grey">#a5acb0</color>
<color name="brown">#525964</color>
<color name="dark_grey">#212121</color>
<color name="aqua">#a6b1ba</color>
<color name="red_cherry">#C9282D</color>
<color name="silver">#A9A9A9</color>
<color name="black">#000000</color>
<color name="transparent">#00000000</color>
<color name="white">#FFFFFF</color>
<color name="blue">#00aceb</color>
<color name="spiritclips_bck">#8AB8E0</color>
<color name="translucent_black">#55000000</color>
<color name="grid_bck">#627583</color>
<color name="grey">#393430</color>
<color name="dark_grey_bg">#1f1c17</color>
<color name="login_font_color_1">#546778</color>
<color name="login_font_color_2">#8E8E8E</color>
<color name="blue_txt">#0f5690</color>
</resources>
for custom_list_item the layout should be
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="?android:attr/activatedBackgroundIndicator" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:textStyle="bold" />
</LinearLayout>
and minimum version of your application should be 11
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