在Android小部件上实现列表
我需要在Android小部件上实现可滚动列表功能。我知道小部件不支持ListView,我曾想过在滚动视图中使用一组按钮,但我不知道如何实现适配器的“回收”功能(使用屏幕上显示的尽可能多的按钮,并在滚动时“回收”它们,刷新按钮上显示的数据)。有人能帮我吗?提前感谢据我所知,您希望实现自定义列表适配器:在Android小部件上实现列表,android,listview,widget,Android,Listview,Widget,我需要在Android小部件上实现可滚动列表功能。我知道小部件不支持ListView,我曾想过在滚动视图中使用一组按钮,但我不知道如何实现适配器的“回收”功能(使用屏幕上显示的尽可能多的按钮,并在滚动时“回收”它们,刷新按钮上显示的数据)。有人能帮我吗?提前感谢据我所知,您希望实现自定义列表适配器: public class YourAdapterName extends BaseAdapter{ private Context mContext; private Vector mValues
public class YourAdapterName extends BaseAdapter{
private Context mContext;
private Vector mValuestoShow;
/**
* Constructor to be called to initialize adapter with values.
* @param context
* @param vector
*/
public YourAdapterName(Context context, Vector vector){
mContext = context;
mValuestoShow = vector;
}
public int getCount() {
if(null != mValuestoShow){
return mValuestoShow.size();
}
return 0;
}
public Object getItem(int position) {
if(position < mValuestoShow.size())
return mValuestoShow.get(position);
else
return null;
}
public long getItemId(int position) {
return 0;
}
/**
* This method can be override to enable/disable particular list row.
*/
@Override
public boolean isEnabled(int position) {
//Write your code here......
return super.isEnabled(position);
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder ;
if(convertView == null){
LayoutInflater li =(LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = li.inflate(R.layout.your_layout, null);
holder = new ViewHolder();
holder.txt_name = (TextView) convertView.findViewById(R.id.name_txt);
convertView.setTag(holder);
}else{
holder = (ViewHolder) convertView.getTag();
}
/**
* Use of enable method how to set different color for disabled row....
* You can also customize your row background color or text color without using enable method
* in the same way as below is done as per your conditions.
*/
if(!isEnabled(position)){
holder.txt_name.setBackgroundColor(mContext.getResources().getColor(R.color.color_code));
holder.txt_name.setTextColor(mContext.getResources().getColor(R.color.white));
}else{
holder.txt_name.setBackgroundColor(mContext.getResources().getColor(R.color.color_code));
holder.txt_name.setTextColor(mContext.getResources().getColor(R.color.black));
}
holder.txt_name.setText(getItem(position).toString());
return convertView;
}
class ViewHolder {
TextView txt_name;
}
}
公共类YourAdapterName扩展BaseAdapter{
私有上下文;
私人向量机;
/**
*要调用的构造函数以使用值初始化适配器。
*@param上下文
*@param向量
*/
公共YourAdapterName(上下文,向量){
mContext=上下文;
mValuestoShow=向量;
}
public int getCount(){
if(null!=mValuestoShow){
返回mValuestoShow.size();
}
返回0;
}
公共对象getItem(int位置){
if(位置
您的_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width = "fill_parent"
android:layout_height = "wrap_content"
android:padding = "10dp" >
<TextView
android:id = "@+id/txt_type1"
android:layout_width = "wrap_content"
android:layout_height = "wrap_content" />
<TextView
android:id = "@+id/txt_type2"
android:layout_width = "wrap_content"
android:layout_height = "wrap_content" />
<Button
android:id = "@+id/btn"
android:layout_width = "wrap_content"
android:layout_height = "wrap_content" />
</RelativeLayout>
注:您可以根据需要添加更多视图,如按钮、图像按钮、编辑文本