Android 如何在列表中实现圆角效果
我已经成功地在CustomAdapter类中实现了圆角ListView,如下所示:Android 如何在列表中实现圆角效果,android,android-listview,android-custom-view,Android,Android Listview,Android Custom View,我已经成功地在CustomAdapter类中实现了圆角ListView,如下所示: @Override public View getView(final int position, View convertView, ViewGroup parent) { // convert view = design View v = convertView; if (v == null) { viewHolder = new ViewHolder();
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
// convert view = design
View v = convertView;
if (v == null) {
viewHolder = new ViewHolder();
v = layoutInflater.inflate(layout, null);
viewHolder.textTitle = (TextView) v.findViewById(R.id.textTitle);
if (position == 0 && arrayList.size() == 1) {
v.setBackgroundResource(R.drawable.top_list_selector);
}
else if (position == 0) {
v.setBackgroundResource(R.drawable.top_list_selector);
}
else if (position == arrayList.size() - 1) {
v.setBackgroundResource(R.drawable.bottom_list_selector);
} else {
v.setBackgroundResource(R.drawable.mid_list_selector);
}
v.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) v.getTag();
}
但我不知道如何在下面的类中实现相同的功能,我知道我必须使用countryList
来代替arrayList
,但是视图和位置如何
public class CountryFragment extends Fragment {
View view;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.fragment_social, container, false);
displayListView();
return view;
}
private void displayListView() {
//Array list of countries
List<String> countryList = new ArrayList<String>();
countryList.add("Country 1");
countryList.add("Country 2");
countryList.add("Country 3");
countryList.add("Country 4");
countryList.add("Country 5");
//create an ArrayAdapter from the String Array
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(getActivity(),
R.layout.adapter_social, countryList);
ListView listView = (ListView) view.findViewById(R.id.listCountry);
// Assign adapter to ListView
listView.setAdapter(dataAdapter);
//enables filtering for the contents of the given ListView
listView.setTextFilterEnabled(true);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
switch( position )
{
case 0:
Toast.makeText(getActivity(), "Country 1", Toast.LENGTH_SHORT).show();
break;
.....
}
}
});
}
}
公共类CountryFragment扩展了片段{
视图;
@凌驾
CreateView上的公共视图(布局、充气机、视图组容器、捆绑包保存状态){
视图=充气机。充气(R.layout.fragment\u,container,false);
displayListView();
返回视图;
}
私有void displayListView(){
//国家列表
List countryList=new ArrayList();
国家列表。添加(“国家1”);
国家列表。添加(“国家2”);
国家列表。添加(“国家3”);
国家列表。添加(“国家4”);
国家列表。添加(“国家5”);
//从字符串数组创建ArrayAdapter
ArrayAdapter dataAdapter=新的ArrayAdapter(getActivity(),
R.layout.u社会,国家列表);
ListView=(ListView)view.findViewById(R.id.listCountry);
//将适配器分配给ListView
setAdapter(dataAdapter);
//启用对给定ListView内容的筛选
setTextFilterEnabled(true);
setOnItemClickListener(新的AdapterView.OnItemClickListener(){
public void onItemClick(AdapterView父级、视图、,
内部位置,长id){
开关(位置)
{
案例0:
Toast.makeText(getActivity(),“Country 1”,Toast.LENGTH_SHORT.show();
打破
.....
}
}
});
}
}
在1代码示例中,用户创建了一个自定义适配器来显示项目列表,如
MyCustomeAdapter extends BaseAdapter
其中,正如在代码中一样,您只是简单地显示了内置适配器,该适配器不支持进行所有这些更改的重写getView()
方法
因此,为了完成示例所做的工作,创建一个类
static class MyListAdapter extends BaseAdapter {
private List<View> views = new ArrayList<View>();
public void addView(View view){
views.add(view);
}
public int getCount() {
return views.size();
}
public Object getItem(int position) {
return views.get(position).getTag();
}
public long getItemId(int position) {
return views.get(position).getId();
}
public View getView(int position, View convertView, ViewGroup parent) {
return views.get(position);
}
}
静态类MyListAdapter扩展BaseAdapter{
私有列表视图=新的ArrayList();
公共无效添加视图(视图){
视图。添加(视图);
}
public int getCount(){
返回视图。size();
}
公共对象getItem(int位置){
返回视图.get(position.getTag();
}
公共长getItemId(int位置){
返回视图.get(position.getId();
}
公共视图getView(int位置、视图转换视图、视图组父视图){
返回视图。获取(位置);
}
}
而不是做
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(getActivity(),
R.layout.adapter_social, countryList);
ArrayAdapter dataAdapter=新的ArrayAdapter(getActivity(),
R.layout.u社会,国家列表);
做
MyListAdapter listAdapter=新的MyListAdapter()
LayoutInflater充气机=getLayoutInflater();
int item_布局=0;
for(int i=0;i
如果您使用的是阵列适配器,则必须使用自定义适配器类,否则无法实现此目的。@umeshchabra谢谢我使用自定义适配器实现了它
LayoutInflater inflater = getLayoutInflater();
int item_layout = 0 ;
for(int i = 0 ; i < values.length;i++) {
//decide which layout to show depending on the item position
if(i==0) {
item_layout = R.layout.top_list_layout ;
} else if(i==values.length-1) {
item_layout = R.layout.bottom_list_layout;
} else {
item_layout = R.layout.mid_list_layout;
}
TextView button = (TextView)inflater.inflate(item_layout, null);
button.setText(values[i]);
button.setTag(new Integer(i));
listAdapter.addView(button);
}
//lv.setSelector(R.color.transparent);
lv.setAdapter(listAdapter);