android中设置ListView的选中的Item的背景颜色(附源码)

http://longyi-java.iteye.com/blog/976067

ListView中没有默认的选择颜色，只有选择Item后的焦点颜色，鼠标点击时Item有颜色，放开鼠标后颜色也就没有了，要实现放开鼠标后选择项的背景还是有颜色的。

1、配置main.xml

Java代码

<?xmlversion="1.0"encoding="utf-8"?>
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ListViewandroid:id="@+id/listView"android:listSelector="#000000"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
</LinearLayout>

设置Item的获取焦点颜色为白色android:listSelector="#000000"（即不显示背景颜色）

2、配置用于ListView显示Item的button_layout.xml

Java代码

<?xmlversion="1.0"encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/LinearLayoutButton"
android:layout_width="144px"
android:layout_height="99px"
android:gravity="center"
android:orientation="vertical">
<TextView
android:id="@+id/TextViewButton"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:textSize="20px">
</TextView>
</LinearLayout>

3、实现Activity

Java代码

packagecom.listButtonTest.www;
importjava.util.ArrayList;
importandroid.app.Activity;
importandroid.content.Context;
importandroid.graphics.Color;
importandroid.os.Bundle;
importandroid.os.Handler;
importandroid.os.Message;
importandroid.view.LayoutInflater;
importandroid.view.View;
importandroid.view.ViewGroup;
importandroid.widget.AdapterView;
importandroid.widget.BaseAdapter;
importandroid.widget.LinearLayout;
importandroid.widget.ListView;
importandroid.widget.TextView;
publicclasslistButtonTestextendsActivity{
privateListViewlistView=null;
privateListAdapterlistAdapter=null;
/**Calledwhentheactivityisfirstcreated.*/
@Override
publicvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
listView=(ListView)this.findViewById(R.id.listView);
ArrayList<ButtonView>buttonListView=newArrayList<ButtonView>();
ButtonViewa=newButtonView(R.string.l1);
buttonListView.add(a);
ButtonViewb=newButtonView(R.string.l2);
buttonListView.add(b);
ButtonViewc=newButtonView(R.string.l3);
buttonListView.add(c);
ButtonViewd=newButtonView(R.string.l4);
buttonListView.add(d);
ButtonViewe=newButtonView(R.string.l5);
buttonListView.add(e);
listAdapter=newListAdapter(buttonListView);
listView.setAdapter(listAdapter);
listView.setDividerHeight(0);
listView.setOnItemClickListener(newListView.OnItemClickListener(){
@Override
publicvoidonItemClick(AdapterView<?>arg0,Viewarg1,intarg2,
longarg3){
//TODOAuto-generatedmethodstub
listAdapter.setSelectedPosition(arg2);
listAdapter.notifyDataSetInvalidated();
}
});
};
publicclassListAdapterextendsBaseAdapter{
ArrayList<ButtonView>arrayList=null;
LayoutInflaterinflater;
Viewview;
ButtonLayoutHolderbuttonLayoutHolder;
LinearLayoutbuttonLayout=null;
TextViewbuttonText=null;
privateintselectedPosition=-1;//选中的位置
publicListAdapter(ArrayList<ButtonView>buttonListView){
//TODOAuto-generatedconstructorstub
arrayList=buttonListView;
}
@Override
publicintgetCount(){
//TODOAuto-generatedmethodstub
returnarrayList.size();
}
@Override
publicObjectgetItem(intposition){
//TODOAuto-generatedmethodstub
returnarrayList.get(position);
}
@Override
publiclonggetItemId(intposition){
//TODOAuto-generatedmethodstub
returnposition;
}
publicvoidsetSelectedPosition(intposition){
selectedPosition=position;
}
@Override
publicViewgetView(intposition,ViewconvertView,ViewGroupparent){
//TODOAuto-generatedmethodstub
inflater=(LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view=inflater.inflate(R.layout.button_layout,null,false);
buttonLayoutHolder=(ButtonLayoutHolder)view.getTag();
if(buttonLayoutHolder==null){
buttonLayoutHolder=newButtonLayoutHolder();
buttonLayoutHolder.buttonLayout=(LinearLayout)view
.findViewById(R.id.LinearLayoutButton);
buttonLayoutHolder.textView=(TextView)view
.findViewById(R.id.TextViewButton);
view.setTag(buttonLayoutHolder);
}
buttonLayout=buttonLayoutHolder.buttonLayout;
buttonText=buttonLayoutHolder.textView;
if(selectedPosition==position){
buttonText.setSelected(true);
buttonText.setPressed(true);
buttonLayout.setBackgroundColor(Color.RED);
}else{
buttonText.setSelected(false);
buttonText.setPressed(false);
buttonLayout.setBackgroundColor(Color.TRANSPARENT);
}
buttonText.setTextColor(Color.WHITE);
buttonText.setText(arrayList.get(position).textViewId);
returnview;
}
};
}
classButtonView{
inttextViewId;
ButtonView(inttId){
textViewId=tId;
}
}
classButtonLayoutHolder{
LinearLayoutbuttonLayout;
TextViewtextView;
}

在listView的setOnItemClickListener事件中标记这次选择的Item的下标：listAdapter.setSelectedPosition(arg2);

然后调用listAdapter.notifyDataSetInvalidated()通知后台重新刷新界面。

在ListAdapter的getView()方法中，如果是选中的Item则显示背景颜色，如果不是则不显示背景颜色。

source download

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